EP0587340A1 - Apparatus for scraping detritus from a surface - Google Patents
Apparatus for scraping detritus from a surface Download PDFInfo
- Publication number
- EP0587340A1 EP0587340A1 EP93306686A EP93306686A EP0587340A1 EP 0587340 A1 EP0587340 A1 EP 0587340A1 EP 93306686 A EP93306686 A EP 93306686A EP 93306686 A EP93306686 A EP 93306686A EP 0587340 A1 EP0587340 A1 EP 0587340A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- operating shaft
- scraping blade
- case
- detritus
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L13/02—Scraping
- A47L13/08—Scraping with scraping blades
Definitions
- This invention relates to an apparatus for scraping detritus such as chewing gum, dirt and other substances from surfaces such as floor surfaces in buildings e.g. stations, from street pavements, and the like.
- an apparatus for scraping detritus from a surface comprising an operating shaft of a length suitable for operation by a user while standing, a scraping blade carried at the lower end of the said operating shaft, and means for driving the said scraping blade to reciprocate to and fro in the lengthwise direction of the said operating shaft.
- the said operating shaft is at least partly hollow and said driving means comprises a cam housed inside said operating shaft and rotatable by a prime mover and having a cam surface, and a scraping blade support member received in said operating shaft and engageable at its upper end with the said cam surface so as to be reciprocable by rotation of the cam.
- detritus such as chewing gum, dirt and other substances adhered to floor surfaces and the like can be quickly scraped up by a user while in an easy posture, and thus the working efficiency of such an operation can be substantially improved.
- reference numeral 1 indicates a hollow cylindrical operating shaft of such length that a user can operate the apparatus by pressing a later described scraping blade 2, located at the lower end of the shaft, against the ground surface 3 or the like, while standing upright.
- the operating shaft 1 may be provided with a suitable handle for a user to hold.
- a cam rod 4 rotatable by a primer mover is provided inside the operating shaft 1.
- the cam rod 4 has a cam surface 4b arranged to rotate about an axis parallel to the length of the operating shaft 1, and is prevented by a thrust bearing 5 and a locking ring 6 from moving in the axial direction.
- a primer mover 7 is mounted on the operating shaft 1 at the rear end thereof, and the lower end 8a of a rotary shaft 8 arranged to be rotated by the prime mover 7 is connected to the upper end 4a of the cam rod 4 so that the cam rod is rotated by the primer mover 7 by way of the rotary shaft 8.
- an electric motor constitutes the prime mover 7 and is connected to an outside electric power source through a cable 9, but a battery may be used instead, or indeed an internal combustion engine.
- the prime mover 7 may be carried by the operator on his back and connected to the apparatus through a flexible shaft or the like, so as to be of the so-called knapsack type.
- Reference numeral 15 indicates a main switch.
- a scraping blade support member 10, engageable at its rear end with the cam surface 4b of the cam rod 4, is housed in the hollow operating shaft 1 so as to be movable by a predetermined stroke in the axial direction of the operating shaft.
- the scraping blade support member is formed at its rear end with a concavity 10a which houses a ball 11, and has a lateral extension 12 arranged to limit downward movement of the member 10 with respect to the operating shaft 1.
- the cam surface 4b of the cam rod 4 is formed to cause the scraping blade support member 10 to reciprocate in the axial direction when the ball 11 engages the cam surface.
- a semi-spherical convexity may be formed at the rear end of the member 10, in place of the ball 11.
- a scraping blade 2 in the shape of a flat spatula is fixed to the lower end of the scraping blade support member 10, by screws 13.
- the prime mover 7 causes the cam rod 4 to rotate. Then, if the scraping blade 2 is pressed against the ground surface 3 or the like, as shown in Fig. 1, by means with the operating shaft 1, the rear end of the scraping blade support member 10 will be pressed against the cam surface 4b through the ball 11, and the member 10 will reciprocate axially together with the scraping blade 2. As a result the scraping blade will enter between the ground surface 3 and a substance 14 such as chewing gum adhered thereto, so that the said substance 14 may be scraped off.
- Figs. 3 to 6 show another embodiment which is the same in its essential features as the embodiment of Figs. 1 and 2 but is a more refined design.
- the main differences from the first embodiment are, first, that the operating shaft 1 is provided with two handles 16, 17 so as to be easier to operate; second, the operating shaft is provided with a housing 18 for a battery or the like so as to be conveniently operable in the absence of mains electric power; third, an electric motor 7 is provided adjacent to the cam rod 4; and fourth, a locking member 12a for the scraping blade support member 10 is provided at the tip of the operating shaft 1.
- the locking member 12a for the support member 10 is substantially L-shaped, with one leg thereof being inserted in a slot 19 formed in the support member 10 and the other leg fixed to the tip of the operating shaft 1 by screws 20.
- the two handles 16 and 17 comprise a main handle 16 and a sub-handle 17.
- the main handle 16 is provided at the rear end of the operating shaft 1 and the sub-handle 17 between the ends of the shaft.
- the main handle 16 is formed as a loop, and carries a trigger type on/off switch.
- the on/off switch comprises a main switch body 21 located internally of the main handle 16, a switch lever 22 for operation by the user, and biasing mean in the form of a spring 23 which pushes the switch lever 22 away from the main switch body 21.
- the main switch body 21 is connected to the electric motor 7 through lead wires 24 so as to control the operation of the electric motor.
- a switch button 21a is provided in the main switch body 21, facing the switch lever 6.
- the switch lever 22 is shaped as a yoke, with actuating parts 22a, 22b at its respective ends and a central operating part 22c which contacts the button 21a.
- the switch lever is arranged so that the operating part 22c faces the switch button 21a with predetermined spacing therebetween and the two actuating parts 22a, 22b protrude through holes 25a, 25b in the handle 16.
- the distance between the actuating parts 22a, 22b is slightly more than the width of a typical adult's hand.
- the switch lever 22 as a whole is urged away from the main switch body 21 by the biasing spring 23, so that the spindles 26, 27 always contact the elongate holes 22d, 22e at the ends 28a, 28b thereof nearer to the main switch body 21, and a predetermined spacing is thereby maintained between the switch button 21a and the operating part 22c.
- the apparatus should be turned over from time to time. This being so, with the on/off switch constructed as described above, it is advantageous that a user can operate the switch using either of the actuating parts 22a, 22b, without changing his working posture.
- the apparatus constructed as described above may be used together with a detritus collecting box 30 as shown in Figs. 9 to 13.
- the detritus collection box 30 comprises a case 31 of inverted U-shaped transverse cross-section, having a top wall 31a and left and right side walls 31b, 31c, and is adapted to be removably attached to the scraping blade 2 of the apparatus.
- grooves 32b, 32c are formed near the bottom of the inside faces of left and right side walls 31b, 31c of the case 31, to slidably receive the side edges of the scraping blade.
- the case 31 is made of transparent plastics material so that the amount of detritus collected can be seen.
- the case 31 can be attached to the scraping blade 2 by sliding the scraping blade along the grooves 32b, 32c until the tip 2a of the blade extends an appropriate distance from the front edge of the case 31.
- the scraping blade 2 is then gripped at its opposite edges between the side walls 31b, 31c of the case 31, so that the case cannot readily slip down any further.
- the case 31 may possibly slip along it in due course. Therefore, as shown in Fig. 10, the side walls 31b, 31c of the case 31 are connected at their lower edges by a narrow connecting member 33 having a protruding portion 34 on its upper surface which engages in a transverse groove in the scraping blade 2, to hold the parts together.
- the upper surface of the scraping blade extends into the interior of the case so that detritus 14 scraped up by the reciprocating movement of the scraping blade passes into the case.
- a front closure 37 is provided in the front opening 36 of the case 31 so as to enable the front opening to be partially opened and closed in stepwise fashion.
- the front closure 37 is arranged so as, in one position, to open only the lower part of the front opening 36, and in another position to fully open the front opening, so that the opening height of the front opening can be adjusted.
- the front closure 37 comprises two flaps 39, 40 connected to each other by a hinge 38 and mounted to the front edge of the top wall 31a of the case 31 by a hinge 41.
- the closure 37 is securable against the front edges of the side walls 31b, 31c of the case 31, to prevent opening of the closure when the case 31 is inclined.
- a securing strip 42 is provided on the lower flap 39 and a holding member 43 for the securing strip is provided on the top wall 31a of the case 31.
- a rear closure flap 45 is provided for the rear opening 44 of the case 31, to enable the opening 44 to be freely opened and closed.
- the flap 45 is connected to the rear edge of the top wall 31a of the case 31 by a hinge 46.
- the detritus collection box 30 constructed as described above is attached to the scraping blade 2 of the apparatus and is normally used with only the lower flap 39 of the front closure 37 open.
- the physical state of the detritus 14 such as chewing gum and the like undergoes changes with temperature. That is, it will be quite hard at low temperatures during winter, but soft and sticky at high temperatures in summer. Consequently, when the temperature is relatively low, detritus such as chewing gum or the like will curl up on the upper surface of the scraping blade 2 when scraped up. However, the detritus will nevertheless be automatically transferred from the front opening 15 to the interior of the case 31 during such curling, because the distance (see Fig. 9) from the top portion 2a of the scraping blade 2 to the front opening 36 of the case 31, and the opening height Y (i.e.
- the height Y of the lower flap 39 are chose so that the detritus 14 is automatically transferred from the front opening 15 to the inside of the case 31 by curling and turning over (see Fig. 11).
- the temperature is high, chewing gum or the like is transferred from the front opening 36 to the inside of the case whilst sticking to some extent to the upper surface of the scraping blade 2 (see Fig. 12).
- Curled or sticky detritus 14 will not easily escape from the front opening 36 once transferred to the inside of the case 31, since the front opening 36 is open only to the height Y of the lower flap 39.
- the lower flap 39 is closed and the apparatus is carried to an appropriate disposal place such as a trash can where the detritus can be disposed of by fully opening the front closure 37 and the rear flap 45.
- Fig. 13 shows another embodiment of the detritus collecting box in which the front opening 36 of the case 31 is openable and closable in stepwise fashion.
- such stepwise opening of the front opening 36 is achieved by providing a front closure 37 which is freely slidable up and down in the front opening.
- the left and right side walls 31b, 31c of the case 31 extend slightly beyond the top wall 31a at 47b and 47c, and these extensions are formed with vertical grooves 48b, 48c in which the front closure 37 is slidable up and down.
- the closure 37 is pushed down until it contacts the upper surface of the scraping blade 2
- the front opening 36 of the case 31 is completely closed, and when the closure 37 is pulled up to a desired extent, the front opening of the case is opened to that extent.
- the degree of opening of the front opening 36 can be adjusted more selectively as compared with the previous embodiment.
- detritus collecting box 30 enables detritus 14 scraped up by the scraping blade 2 to be automatically collected in the case 31, whereby the labor cost for collecting the scraped up detritus can be saved and the operation of scraping up the detritus can be generally improved in efficiency and carried out in an easy working posture by the user.
Abstract
Description
- This invention relates to an apparatus for scraping detritus such as chewing gum, dirt and other substances from surfaces such as floor surfaces in buildings e.g. stations, from street pavements, and the like.
- Heretofore, in order to remove chewing gum or the like adhered to the surface of a station platform for example, a worker had to use a small hand tool such as a spatula, while bending down or squatting. However, in carrying out such an operation, quite large force is sometimes required, with the result that muscular pain is caused by the necessary working posture, working efficiency is low, and it takes a long time to achieve good results.
- It is an object of the present invention to provide an apparatus by means of which adhered substances such as those mentioned above can be quickly scraped off by a user in an unstressful standing working posture.
- Thus according to the present invention there is provided an apparatus for scraping detritus from a surface, comprising an operating shaft of a length suitable for operation by a user while standing, a scraping blade carried at the lower end of the said operating shaft, and means for driving the said scraping blade to reciprocate to and fro in the lengthwise direction of the said operating shaft.
- In a preferred form of the invention the said operating shaft is at least partly hollow and said driving means comprises a cam housed inside said operating shaft and rotatable by a prime mover and having a cam surface, and a scraping blade support member received in said operating shaft and engageable at its upper end with the said cam surface so as to be reciprocable by rotation of the cam.
- By means of apparatus according to the present invention, detritus such as chewing gum, dirt and other substances adhered to floor surfaces and the like can be quickly scraped up by a user while in an easy posture, and thus the working efficiency of such an operation can be substantially improved.
- Some embodiments of the invention will now be described by way of example and with reference to the accompanying drawings, which:-
- Fig. 1 is a perspective view of a first embodiment of the invention, in use;
- Fig. 2 is an enlarged axial cross-sectional view of relevant parts of the apparatus of Fig. 1;
- Fig. 3 is a perspective view of a second embodiment;
- Fig. 4 is an enlarged perspective view of relevant parts of the apparatus of Fig. 3;
- Fig. 5 is an axial cross-sectional view of part of the apparatus of Fig. 3;
- Fig. 6 is an exploded perspective view of part of the apparatus of Fig. 3;
- Fig. 7 is a cross-sectional view of the main handle of the apparatus of Fig. 3;
- Fig. 8 is a cross-sectional view of the on/off switch of the apparatus of Fig. 3;
- Fig. 9 is a perspective view of a detritus collecting box for use with the apparatus of either of the previous embodiments;
- Fig. 10 is a cross-sectional view showing the manner of interconnection of the scraping blade and the detritus collecting box;
- Figs. 11 and 12 are cross-sectional views illustrating the collection of adhered substances; and
- Fig. 13 is a perspective view of another embodiment of a detritus collecting box.
- Referring first to the embodiment of Figs. 1 and 2, reference numeral 1 indicates a hollow cylindrical operating shaft of such length that a user can operate the apparatus by pressing a later described
scraping blade 2, located at the lower end of the shaft, against theground surface 3 or the like, while standing upright. As in the another embodiment to be described later, the operating shaft 1 may be provided with a suitable handle for a user to hold. - As shown in Fig. 2, a
cam rod 4 rotatable by a primer mover is provided inside the operating shaft 1. Thecam rod 4 has acam surface 4b arranged to rotate about an axis parallel to the length of the operating shaft 1, and is prevented by a thrust bearing 5 and alocking ring 6 from moving in the axial direction. Aprimer mover 7 is mounted on the operating shaft 1 at the rear end thereof, and thelower end 8a of arotary shaft 8 arranged to be rotated by theprime mover 7 is connected to theupper end 4a of thecam rod 4 so that the cam rod is rotated by theprimer mover 7 by way of therotary shaft 8. In this embodiment an electric motor constitutes theprime mover 7 and is connected to an outside electric power source through a cable 9, but a battery may be used instead, or indeed an internal combustion engine. Theprime mover 7 may be carried by the operator on his back and connected to the apparatus through a flexible shaft or the like, so as to be of the so-called knapsack type.Reference numeral 15 indicates a main switch. - A scraping
blade support member 10, engageable at its rear end with thecam surface 4b of thecam rod 4, is housed in the hollow operating shaft 1 so as to be movable by a predetermined stroke in the axial direction of the operating shaft. The scraping blade support member is formed at its rear end with aconcavity 10a which houses a ball 11, and has alateral extension 12 arranged to limit downward movement of themember 10 with respect to the operating shaft 1. - The
cam surface 4b of thecam rod 4 is formed to cause the scrapingblade support member 10 to reciprocate in the axial direction when the ball 11 engages the cam surface. A semi-spherical convexity may be formed at the rear end of themember 10, in place of the ball 11. - A
scraping blade 2 in the shape of a flat spatula is fixed to the lower end of the scrapingblade support member 10, byscrews 13. - In operation, when the
main switch 15 is switched on, theprime mover 7 causes thecam rod 4 to rotate. Then, if thescraping blade 2 is pressed against theground surface 3 or the like, as shown in Fig. 1, by means with the operating shaft 1, the rear end of the scrapingblade support member 10 will be pressed against thecam surface 4b through the ball 11, and themember 10 will reciprocate axially together with thescraping blade 2. As a result the scraping blade will enter between theground surface 3 and asubstance 14 such as chewing gum adhered thereto, so that the saidsubstance 14 may be scraped off. - In the apparatus of the above described embodiment, even when the
switch 15 is on, unless thescraping blade 2 is pressed against theground surface 3, thescraping blade 2 will not reciprocate and will thus be safe. This is because when the scraping blade supportmember 10 and thescraping blade 2 hang down, without contacting theground surface 3, their weight causes the ball 11 to be disengaged from thecam surface 4b, and in particular from the upstanding part thereof, and consequently thescraping blade 2 does not reciprocate. On the other hand, when work is started and thescraping blade 2 is pressed against theground surface 3, the blade will reciprocate. - Figs. 3 to 6 show another embodiment which is the same in its essential features as the embodiment of Figs. 1 and 2 but is a more refined design. The main differences from the first embodiment are, first, that the operating shaft 1 is provided with two
handles housing 18 for a battery or the like so as to be conveniently operable in the absence of mains electric power; third, anelectric motor 7 is provided adjacent to thecam rod 4; and fourth, alocking member 12a for the scrapingblade support member 10 is provided at the tip of the operating shaft 1. - The
locking member 12a for thesupport member 10 is substantially L-shaped, with one leg thereof being inserted in aslot 19 formed in thesupport member 10 and the other leg fixed to the tip of the operating shaft 1 byscrews 20. - The two handles 16 and 17 comprise a
main handle 16 and asub-handle 17. Themain handle 16 is provided at the rear end of the operating shaft 1 and thesub-handle 17 between the ends of the shaft. Themain handle 16 is formed as a loop, and carries a trigger type on/off switch. - Referring to Fig. 7, the on/off switch comprises a
main switch body 21 located internally of themain handle 16, aswitch lever 22 for operation by the user, and biasing mean in the form of aspring 23 which pushes theswitch lever 22 away from themain switch body 21. - The
main switch body 21 is connected to theelectric motor 7 throughlead wires 24 so as to control the operation of the electric motor. A switch button 21a is provided in themain switch body 21, facing theswitch lever 6. - The
switch lever 22 is shaped as a yoke, with actuatingparts central operating part 22c which contacts the button 21a. The switch lever is arranged so that theoperating part 22c faces the switch button 21a with predetermined spacing therebetween and the two actuatingparts holes handle 16. The distance between the actuatingparts - Two
elongate holes parts Spindles handle 16 extend through theholes switch lever 22 as a whole is urged away from themain switch body 21 by the biasingspring 23, so that thespindles elongate holes ends main switch body 21, and a predetermined spacing is thereby maintained between the switch button 21a and the operatingpart 22c. - In operation, if the user pushes for example the actuating
part 22a, against the force of thespring 23, the switch lever 22 tilts about thespindle 27 associated with the other actuatingpart 22b, as shown in Fig. 8. As a result, theoperating part 22c pushes the switch button 21a of themain switch body 21, which results in the switch going on. When the actuatingpart 22a is released theswitch lever 22 is returned to its original position by the force of thespring 23 which results in the switch going off. The same effect is achieved by operating the actuatingpart 22b. - During long-term operation of the apparatus to scrape off detritus such as chewing gum or the like, the side of the
tip 2a of thescraping blade 2 which contacts theground surface 3 will wear. Therefore, in order to uniformly use both sides of the tip of the scraping blade, the apparatus should be turned over from time to time. This being so, with the on/off switch constructed as described above, it is advantageous that a user can operate the switch using either of the actuatingparts - The apparatus constructed as described above may be used together with a
detritus collecting box 30 as shown in Figs. 9 to 13. - The
detritus collection box 30 comprises acase 31 of inverted U-shaped transverse cross-section, having a top wall 31a and left andright side walls scraping blade 2 of the apparatus. Thusgrooves right side walls case 31, to slidably receive the side edges of the scraping blade. Preferably thecase 31 is made of transparent plastics material so that the amount of detritus collected can be seen. - As shown in Fig. 10, the
case 31 can be attached to thescraping blade 2 by sliding the scraping blade along thegrooves tip 2a of the blade extends an appropriate distance from the front edge of thecase 31. Thescraping blade 2 is then gripped at its opposite edges between theside walls case 31, so that the case cannot readily slip down any further. However, since thescraping blade 2 vibrates up and down in use, thecase 31 may possibly slip along it in due course. Therefore, as shown in Fig. 10, theside walls case 31 are connected at their lower edges by a narrow connectingmember 33 having a protrudingportion 34 on its upper surface which engages in a transverse groove in thescraping blade 2, to hold the parts together. - When the
case 31 is attached to thescraping blade 2 as described above, the upper surface of the scraping blade extends into the interior of the case so thatdetritus 14 scraped up by the reciprocating movement of the scraping blade passes into the case. - A
front closure 37 is provided in thefront opening 36 of thecase 31 so as to enable the front opening to be partially opened and closed in stepwise fashion. Thus thefront closure 37 is arranged so as, in one position, to open only the lower part of thefront opening 36, and in another position to fully open the front opening, so that the opening height of the front opening can be adjusted. - In more detail, the
front closure 37 comprises twoflaps hinge 38 and mounted to the front edge of the top wall 31a of thecase 31 by ahinge 41. Theclosure 37 is securable against the front edges of theside walls case 31, to prevent opening of the closure when thecase 31 is inclined. - A securing
strip 42 is provided on thelower flap 39 and a holdingmember 43 for the securing strip is provided on the top wall 31a of thecase 31. Thus, if thelower flap 39 is opened and the securingstrip 42 is connected to the holdingmember 43, the front of thecase 31 will be open to an extent equal to the height Y of the lower flap 39 (see Fig. 9). If theupper flap 40 is opened also, then the front of thecase 31 is fully opened. - A
rear closure flap 45 is provided for therear opening 44 of thecase 31, to enable theopening 44 to be freely opened and closed. Theflap 45 is connected to the rear edge of the top wall 31a of thecase 31 by ahinge 46. - The
detritus collection box 30 constructed as described above is attached to thescraping blade 2 of the apparatus and is normally used with only thelower flap 39 of thefront closure 37 open. - The physical state of the
detritus 14 such as chewing gum and the like undergoes changes with temperature. That is, it will be quite hard at low temperatures during winter, but soft and sticky at high temperatures in summer. Consequently, when the temperature is relatively low, detritus such as chewing gum or the like will curl up on the upper surface of thescraping blade 2 when scraped up. However, the detritus will nevertheless be automatically transferred from thefront opening 15 to the interior of thecase 31 during such curling, because the distance (see Fig. 9) from thetop portion 2a of thescraping blade 2 to thefront opening 36 of thecase 31, and the opening height Y (i.e. the height Y of the lower flap 39) are chose so that thedetritus 14 is automatically transferred from thefront opening 15 to the inside of thecase 31 by curling and turning over (see Fig. 11). On the other hand, when the temperature is high, chewing gum or the like is transferred from thefront opening 36 to the inside of the case whilst sticking to some extent to the upper surface of the scraping blade 2 (see Fig. 12). - Curled or
sticky detritus 14 will not easily escape from thefront opening 36 once transferred to the inside of thecase 31, since thefront opening 36 is open only to the height Y of thelower flap 39. - After the scraping up and collecting of the
detritus 14 is completed as described above, thelower flap 39 is closed and the apparatus is carried to an appropriate disposal place such as a trash can where the detritus can be disposed of by fully opening thefront closure 37 and therear flap 45. - Fig. 13 shows another embodiment of the detritus collecting box in which the
front opening 36 of thecase 31 is openable and closable in stepwise fashion. - In this embodiment, such stepwise opening of the
front opening 36 is achieved by providing afront closure 37 which is freely slidable up and down in the front opening. The left andright side walls case 31 extend slightly beyond the top wall 31a at 47b and 47c, and these extensions are formed withvertical grooves front closure 37 is slidable up and down. When theclosure 37 is pushed down until it contacts the upper surface of thescraping blade 2, thefront opening 36 of thecase 31 is completely closed, and when theclosure 37 is pulled up to a desired extent, the front opening of the case is opened to that extent. Thus in this embodiment the degree of opening of thefront opening 36 can be adjusted more selectively as compared with the previous embodiment. - Use of the
detritus collecting box 30 as described above enablesdetritus 14 scraped up by thescraping blade 2 to be automatically collected in thecase 31, whereby the labor cost for collecting the scraped up detritus can be saved and the operation of scraping up the detritus can be generally improved in efficiency and carried out in an easy working posture by the user.
Claims (4)
- An apparatus for scraping detritus from a surface, comprising an operating shaft of a length suitable for operation by a user while standing, a scraping blade carried at the lower end of the said operating shaft, and means for driving the said scraping blade to reciprocate to and fro in the lengthwise direction of the said operating shaft.
- An apparatus as claimed in claim 1, wherein said operating shaft is at least partly hollow and said driving means comprises a cam housed inside said operating shaft and rotatable by a prime mover and having a cam surface, and a scraping blade support member received in said operating shaft and engagable at its upper end with the said cam surface so as to be reciprocable by rotation of the cam.
- An apparatus as claimed in claim 1 or 2, further comprising a case for receiving scraped up detritus, grooves being provided on inside walls of said case to slidably receive side edges of the said scraping blade to enable the case to be attached to the blade, the front of said case being open and having an openable and closable closure means.
- An apparatus as claimed in any of claims 1 to 3, further including an on/off switch for said drive means comprising a main switch body provided inside a handle of said operating shaft, a switch operating lever having two actuating parts which extend from said handle and an operating part arranged to contact main switch body to operate the switch upon the user pushing either one of said actuating parts, and biasing mean urging said switch lever in the direction away from said main switch body.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP64738/92U | 1992-08-24 | ||
JP6473892U JP2586055Y2 (en) | 1992-08-24 | 1992-08-24 | Waste collection and storage device in the adhering matter scraping device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0587340A1 true EP0587340A1 (en) | 1994-03-16 |
EP0587340B1 EP0587340B1 (en) | 1997-06-11 |
Family
ID=13266796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19930306686 Expired - Lifetime EP0587340B1 (en) | 1992-08-24 | 1993-08-24 | Apparatus for scraping detritus from a surface |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0587340B1 (en) |
JP (1) | JP2586055Y2 (en) |
DE (1) | DE69311475T2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022228244A1 (en) * | 2021-04-30 | 2022-11-03 | 北京顺造科技有限公司 | Surface cleaning apparatus and controlling method therefor |
US11695312B2 (en) | 2017-09-01 | 2023-07-04 | Milwaukee Electric Tool Corporation | Electrostatic discharge dissipation structure |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2443602A (en) * | 1944-12-05 | 1948-06-22 | Ruth G Clark | Scraping and calking tool for ships |
US2649604A (en) * | 1949-12-24 | 1953-08-25 | Hess Alexander Mcd | Kitchen appliance, scrapercollector |
US3733637A (en) * | 1971-06-07 | 1973-05-22 | A Becker | Floor scraper |
DE2645737A1 (en) * | 1976-10-09 | 1978-04-13 | Rolf Erkens | Tool for stripping wall paper or paint - has oscillating blade driven by connecting rod from electric motor |
GB2039812A (en) * | 1978-12-19 | 1980-08-20 | Litler Jones T | Implement for Removal of Adhesive Matter from Surfaces |
GB2093751A (en) * | 1981-03-02 | 1982-09-08 | Achille Geoffrey David | Wallpaper stripping device |
US4888846A (en) * | 1988-01-05 | 1989-12-26 | Gpac, Inc. | Asbestos scraper |
-
1992
- 1992-08-24 JP JP6473892U patent/JP2586055Y2/en not_active Expired - Lifetime
-
1993
- 1993-08-24 DE DE1993611475 patent/DE69311475T2/en not_active Expired - Fee Related
- 1993-08-24 EP EP19930306686 patent/EP0587340B1/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2443602A (en) * | 1944-12-05 | 1948-06-22 | Ruth G Clark | Scraping and calking tool for ships |
US2649604A (en) * | 1949-12-24 | 1953-08-25 | Hess Alexander Mcd | Kitchen appliance, scrapercollector |
US3733637A (en) * | 1971-06-07 | 1973-05-22 | A Becker | Floor scraper |
DE2645737A1 (en) * | 1976-10-09 | 1978-04-13 | Rolf Erkens | Tool for stripping wall paper or paint - has oscillating blade driven by connecting rod from electric motor |
GB2039812A (en) * | 1978-12-19 | 1980-08-20 | Litler Jones T | Implement for Removal of Adhesive Matter from Surfaces |
GB2093751A (en) * | 1981-03-02 | 1982-09-08 | Achille Geoffrey David | Wallpaper stripping device |
US4888846A (en) * | 1988-01-05 | 1989-12-26 | Gpac, Inc. | Asbestos scraper |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11695312B2 (en) | 2017-09-01 | 2023-07-04 | Milwaukee Electric Tool Corporation | Electrostatic discharge dissipation structure |
WO2022228244A1 (en) * | 2021-04-30 | 2022-11-03 | 北京顺造科技有限公司 | Surface cleaning apparatus and controlling method therefor |
Also Published As
Publication number | Publication date |
---|---|
DE69311475D1 (en) | 1997-07-17 |
EP0587340B1 (en) | 1997-06-11 |
JP2586055Y2 (en) | 1998-12-02 |
DE69311475T2 (en) | 1997-12-04 |
JPH0621565U (en) | 1994-03-22 |
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