US3167801A - Scraping devices - Google Patents

Description

Feb. 2, 1965 H. B. ENGINEER 3,167,801

SCRAPING DEVICES Filed March 21, 1965 Inventor H- 5. Engineer ZZJW Attorneys United States Patent ngland Filed Mar. 21, 1963, Ser. No. 267,007

' 6 Claims. (Cl. 15-236) This invention relates to a device for scraping woodwork or paint which can be used in place of the conventional sandpaper block.

An object of the present invention is to provide a scraping device comprising a block adapted tobe held in the hand and having mounted in one surface thereof a plurality of blades which extend substantially parallel to one another in spaced apart relation, the sharp edges of the blades projecting a short distance above said surface. Another object of the invention is to prov de an arrangement for resiliently mounting the blades 1n the block so that the sharp edges of the blades may all he in the same plane and by lightly pressing on the device when it is applied to a surface to be scraped, the sharp edges of the blades will all be engaged with the surface. A further object is to provide an arrangement for resiliently mounting the blades which is suitable not only for hand operated devices but also mechanically dnven scrapers.

In order that the present invention may be readily understood, reference will now be made to the accompanying drawing which shows two embodiments thereof by way of example and in which:

FIGURE 1 is a plan view of a hand operated device constructed in accordance with the invention,

FIGURE 2 is a side view thereof,

FIGURE 3 is a section along the line AA in FIG- URE 1,

FIGURE 4 is an end view of the device shown in FIG- URE 1,

FIGURE 5 is a section along the line BB in FIG- URE 1,

FIGURE 6 is a section along the line 0-0 in FIG- URE l, and

FIGURE 7 is a section through part of a rotary scraper constructed in accordance with the invention.

Referring to the embodiment shown in FIGURES l to 6, the device comprises a body in the form of a block 1 of rigid material provided with three transverse slots or recesses 2 to accommodate the blades 3 and longitudinal channels 4 to accommodate stretched elastic bands 5, two such bands being looped around the block with the upper lengths engaging in slots 6 extending inwardly from opposite end edges of the blades. The bottoms of the transverse slots 2 may be enlarged to provide a clearance and allow the blades to move into the slots, while supported by the resilient bands, so as to enable the initial pressure applied on the device correctly to align all the blades on the surface to be scraped. The length of the elastic bands is shorter than the peripheral lengths of the channels into which they fit so as to ensure that the belts are maintained under tension when fitted. The thickness of the belts is preferably slightly greater than the width of the slots so that the blades are gripped by the resilience of the belts and are in vertical position when the device is not in use.

The block can be a plastic moulding, a sheet metal pressing or made of wood or other suitable material with, if desired, metal inserts to form the blade slots.

The blades may be double-edged and can be resharpened without removal from the device by operating the device on a hard, smooth surface, such as plate glass.

The invention can also be applied to a rotary scraper, as illustrated in FIGURE 7, by mounting the blades in 3 ,l 6 7 ,8 d l Fatented Feb. 2, 1955 slots 8 arranged radially around a cylindrical body or core 9 and suspending them in position by two elastic belts it) fitted around the core and passing through slots 11 in the blocks.

Whilst particular embodiments have been described it will be understood that various modifications may be made without departing from the scope of the invention as defined by the appended claims. For example, the slots in which the elastic strips fit need not be open at the ends but can be enclosed slots through which the strips or belts" can be threaded. Moreover, instead of making the body of the scraping device in one piece it may be formed from a plurality of separate parts and the blades may be located in position by disposing them between juxtaposed portions of adjacent parts. i

I claim:

1. A scraping device comprising a body, a surface on said body having a plurality of spaced recesses therein which extend generally parallel to one another, a plurality of blades received respectively in said recesses and having sharp edges facing outwardly of said recesses, and elastic strips mounted on said body and passing through slots in said blades, the distance between said slots and the edges of said blades opposite their sharp edges being less than the depth of said recesses, whereby said blades are resiliently supported normally substantially perpendicular to said surface with their sharp edges projecting above said surface and their opposite edges spaced from the bottoms of said recesses.

2. A scraping device comprising a body, a surface on said body having a plurality of spaced slots therein Which extend generally parallel to one another, a plurality of blades received respectively in said slots and having sharp edges facing outwardly of said slots, and a plurality of elastic bands looped over parts on the body to stretch the bands, said stretched bands having stretched lengths passing through slots in said blades, the distance between the slots in said blades and the edges thereof opposite their sharp edges being less than the depth of the slots in said body, whereby said blades are resiliently supported normally substantially perpendicular to said surface with their sharp edges projecting above said surface and their opposite edges spaced from the bottoms of said slots.

3. A device as claimed in claim 2, wherein the thickness of said stretched lengths of the elastic bands is greater than the width of the slots in the blades, the blades thereby being gripped by the resilience of the bands.

4. A scraping device comprising a rigid cylindrical core having slots in its cylindrical external surface, said slots extending generally axially of the core and being spaced therearound, a plurality of blades received respectively in said slots and having sharp edges facing outwardly of said slots, and elastic strips mounted on said core and passing through slots in said blades, the depth between the slots in said blades and the edges thereof opposite said sharp edges being less than the depth of the slots in said core whereby said blades are resiliently supported normally extending substantially radially of said core with their sharp edges projecting above said external surface of said core and their opposite edges spaced from the bottoms of said slots.

5. A scraping device comprising a rigid block, a surface on said block having a plurality of spaced slots therein which extend generally parallel to one another, a plurality of blades received respectively in said slots and having sharp edges facing outwardly of said slots, each of said blades being formed with two slots extending inwardly from opposite end edges of the blade respectively, and two endless elastic bands looped around said block and extending generally transversely to said slots in said surface, said bands being retained in stretched relation by said block. and having stretched lengths passing through the slots-at said opposite end edges of the. blades respectively, the distance betweem the slots in said blades and the edges thereof opposite said sharp edges being less than the depth of the slots in said block whereby said blades are resiliently supported by the bands with their sharpedges projecting above said surface and their opposite edges spaced from the bottoms of said slots, and the thickness of said stretched lengths of the elastic bands being greater than the width of the slots in the blades to resiliently grip said blades.

6. A scraping device comprising a rigid block having a fiat surface, said surface having a plurality of spaced slots therein extending generally parallel to one another, a plurality of blades received respectively in said slots and having sharp edges facing outwardly of said slots, and two endless elastic bands loopedaround the block and extending generally transversely to the slots in said surface, said bands being retained in stretched relation by the block and having stretched lengths passing through. slots in said blades, the distance between the slots in said blades and the edges thereof opposite said sharp edges being less than the depth of the slots in said block whereby said blades are resiliently supported by said blades with their sharp edges projecting a short distance above said surface and their opposite, edges spaced from the bottoms of said slots, the thickness of said stretched lengths being greater than the Width of the slots in the blades, whereby said blades are gripped by the resilience of the bands, and the slots in said surface being slightly i wider than the thickness of the blades to permit the blades to deflect transversely thereof during to-and-fro motion of the device.

Claims (1)

1. A SCRAPING DEVICE COMPRISING A BODY, A SURFACE ON SAID BODY HAVING A PLURALITY OF SPACED RECESSES THEREIN WHICH EXTEND GENERALLY PARALLEL TO ONE ANOTHER, A PLURALITY OF BLADES RECEIVED RESPECTIVELY IN SAID RECESSES AND HAVING SHARP EDGES FACING OUTWARDLY OF SAID RECESSES, AND ELASTIC STRIPS MOUNTED ON SAID BODY AND PASSING THROUGH SLOTS IN SAID BLADES, THE DISTANCE BETWEEN SAID SLOTS AND THE EDGES OF SAID BLADES OPPOSITE THEIR SHARP EDGES BEING LESS THAN THE DEPTH OF SAID RECESSES, WHEREBY SAID BLADES ARE RESILIENTLY SUPPORTED NORMALLY SUBSTANTIALLY PERPENDICULAR TO SAID SURFACE WITH THEIR SHARP EDGES PROJECTING ABOVE SAID SURFACE AND THEIR OPPOSITE EDGES SPACED FROM THE BOTTOMS OF SAID RECESSES.

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