US2642272A - Blade mounting structure for linoleum and asphalt tile remover - Google Patents

Description

June 16, 1953 .T. c. RUSH 2,642,272

BLADE MOUNTING STRUCTURE FOR LINOLEUM 1 AND ASPHALT TILE REMOVER 2 Sheets-Sheet 1 Filed Jan. 16, 1950' Thomas 6. Rush IN VEN TOR.

June 16, 1953 1', c, RU 2,642,272

BLADE MOUNTING STRUCTURE FOR LINOLEUM AND ASPHALT TILE REMOVER Filed Jan. 16, 1950 2 Sheets-Sheet 2 F 1g. 6 a R F ig; I0 Fig. I! 68 64 I Thomas 6. Rush INVENTOR.

Patented June 16, l953 UNITED s'rlu'es PATENT OFFICEn- BLADE MOUNTING. STRUCTURE'FOR, Lmo- LEUM AND ASPHALT TILE REMoven Thomas C. Rush, Mansfield, Mo. Application Jamal-v16, 1950, Serial No. 138,867-

comprising a plurality of circumferentially and axially disposed blades carried by a shaft and rotatable therewith for 'abrading, scraping or otherwise treating a surface.

Important features of this. invention reside in the provision of a surface scraper having a mobile base together with a rotor and an operating means therefor supported upon the base, to-

gether with improved constructions of knives carried by the rotor for scraping a surface.

These, together with various ancillary features and objects which will later become apparent as the following description proceeds, are attained by the present invention, preferred embodiments of which have been illustrated by way of example only in the accompanying drawings, wherein:

Figure 1 is a side elevational view, parts being broken away, showing a suitable embodiment in accordance with the principles of this invention; Figure 2 is a bottom plan view of the mobile supporting base forming a part .of the construcon of Fi ure 1 -and showil 's' more particul r y he erti al a justing mcans ofthe same;

Figure 3 s. a" diagrammatic view'illiisir-anus he adial or ircumferenti llv' spaced arranse-' m rit of the kn ves or the rotor of the device;

Figur 4 is a fragmentary end view showin ne c nstruction o kn fe a dits arran ement u on e t r shaft; Figure 5 is an end elevational 'ew of the arl lt fisi r 2 2 2 Claims. (01. 262-203 V Figure his a view taken at right angles to Figure 10;.

Figure 12 is atrragmentary elevational view showing a modified construction for mounting the blades on the rotor shaft showing a different construction of supporting arm and knife blade secured thereon; and. I

Fi ure 13 is a vertical transverse sectional I view taken substantially upon the plane indi--- cated by the section line [3- 43 of Figure '12.

- Referring now more specifically to the ac companying drawin s wherein like numerals designate similar parts {throughout the various views, attention is directed first to Figures i and 2, wherein it will be seen that the numeral l 0 represents generally a supporting platform or 7 base which is provided with a customary handle Figu e 1s, a p an view iii the a rieiiri ure b in cco dance with. t e e t QiFisu e F gu iege-vert cal tra sve se sectionalview ak bs a tially upon the plane indicated by the section line 1-H! of Figured;

\ F gure 8 is a side e cvati n viewof one of he su po t ng arm and a knife carried, thereby; Figu 9 is a view tak n at ri ht auslcsto Fig: ure- 8;,

Figure 1,0 is alv -cw sim la o Figure 8 but howi g a modified con truc on of supporting arm and blade;

e ass d? tr 12 which, in conjunction with a, pair orfixed supporting rollers and a vertically adjustable supporting roller 16 render the base mobile as desired. T a

A suitable prime .mover of any desired character indicated at, l8, and which may conveniently comprise an electric motor or the like, is provided with a driving belt 20 which serves to impart rotation to a rotor indicated generally by the numeral .22.

,At its outer or forward end, the base or. platform L0 is provided with a pair of outwardly extending plate-like support brackets 24 which are disposed in vertical parallel relation and which are provided with vertically elongated slots 26 throughwhich extend fastening bolts 28 which serve to vertically adjust and secure in adjusted position journal members 3!] of any desired character which are thus mounted upon the adjacent or inner surfaces of the vertical support brackets 24 for vertical adjustment thereon. The above mentioned rotor assembly 22. is intended to be journaled in the journal bearingstll and to be vertically adjustable while extending horizontally between the same in'a manher which will be readily apparent. An arcuateto overlie and rest upon the arcuately shaped outer surface of the brackets 24, these arcuated surfaces being indicated atv 36. The shield 32 is thus positioned by gravity in the position shown in Figure ,1, to thus enclose the upper portion of the rotor 22; but may be pivoted in a clockwise direction about its pivot pins 34 to an open position, whereby access may be had to the upper portion of the rotor-assembly. Referring now more specifically to Figure 2, it

will be seen that the vertically adjustable supporting wheel I6 is journaled upon one extremity of a connecting rod 38, the other end of this connecting rod being slidably received in a bracket 40 which thus serves to slidingly retain the end of the rod 38 to the lower surface of the platform ill.

A pair of supporting brackets or bearing 42 are suitably secured to the bottom surface of the base ID, and rotatably journaled therebetween a crank shaft 44 having a crank throw or crank.

45 disposed thus between the bearings 42.

means of a connecting rod cap 48, the connecting 1 rod 33 is secured to the crank throw 46 in such a manner that by rotating the crank shaft 44 through a predetermined angular movement, the

angular. relation of the connecting rod 31 with to. assume a position from which the same may yield if excessive resistance is encountered by the cutting edge 10 during rotation of the rotor.

7 Alternatively, the blade construction of Figures i. and may be employed, the same consisting of a triangular shaped plate It having one apex secured to the pivot pin 14, having another apex l8 constituting its cutting edge, and having a respect to the base In may be varied whereby the A vertical spacing of the supporting wheel IS with respect to the under surface of the, base it! may likewise'be varied to'thereby shift or adjust the inclination of the base ID with respect to the floor or other supporting surface whereby the rotor assembly 22 maybe raised or lowered in a manner which will now be readily understood;

This rotor assembly, as shown in Figure 6, preferably comprises an axle or shaft 56 of any desired character which is journaled betweenand supported between the two journal bearings 36 for rotation abouta horizontal axis and for ver-' tical adjustment as above set forth. A plurality of radially extending support arms 52 are rigidly or otherwise securedto the shaft 50 for rotation therewith, and the outer ends of these arms are provided with blades having cutting edges which are adapted to scrape or abrade the surface with which the rotor is to beemployed. While it is within the purview of thisinvention to form these cutting edges integral with the arms 52,, it is to be understood that it'is preferred to form the same separately and to detachably mount the cutting blades upon the arms in order to obtain the benefits of a superior material for the cutting edges and a more economical material for the supporting arms.

While, as shown in Figures 6 and 7, the supporting arms 52 are provided with beveled edges or the like 54 to constitute the cutting blades, it is preferred to form the blades separate from the arms, as shown in Figures 8 and 9. For this purpose, the blades may consist of flat plates. or the like 56 which are provided with elongated slots 58 for the receptionof fastening bolts 66 whereby the blades may be separately attached to and adjustably mounted upon theends of the support arms 52.

Alternatively, instead of the support arm construction disclosed in Figures 6v and 7, the arrangement shown in Figures and 11 may be employed, this consisting of aradi-ally extending; arm 62 having a hub portion 64 adapted to be retained by pivot pins in the same manner as at 14 in Figures 4 and 5. The arm 62, at its outer extremity, has an inclined portion 66 which extends backwardlyand has an edge 68 which is. disposed preferably upon a radius of the, hub 54.

As shown in Figure5, the shaft .0 may be third apex disposed to one side of the radius joining the center of the shaft 50 with a cutting edge 18 for the same purpose as set forth in connection with the arrangement of Figures 10 and 11;.

Preferably, a multiplicity of blades is provided about the rotor shaft, and it is preferred to form this plurality of blades in an arrangement in which the blades are spaced equidistantly both axially and circumferentially of the rotor shaft, For this purpose, as shown in the diagrammatic view in Figure 3 in conjunction with the showing of Figure 6, this principle of the invention has been illustrated in connection with an assembly consisting of sixteen rotor blades or arms, the same being numbered A-P, respectively. As will be seen from Figure 6, the adjacent blades or arms A through P are disposed consecutively at even axial distances along the rotor shaft, and as shown in Figure 3 are disposed at equal angular intervals about the shaft. However, blades which are adjacent axially of the shaft are pref-' erably disposed in non-adjacent but in regular spaced relation circumferentially of the shaft. Thus, as will be apparent from Figure 3, each. blade is disposed at an angular interval with respect to the next axially adjacent blade, which is equivalent to 360 divided by one-half N plus 1, in which N is equal to the number of the blades.

While various other arrangements of the blades could be provided, the foregoing arrangement is particularly advantageous and effective for the purposes intended.

In addition to the foregoing arrangements, the construction of Figures l2 and 13 may be employed. In this. construction, the shaft 50 has detachably secured thereon a cylindrical drum 5| provided with a plurality of axially extending, circumferentially spaced slots 82, there being one such slot for each of the intended blades. The drum may be retained as by set screws, not shown, on the shaft 50. A bladesupporting arm or holder 84 in'the form of a strip vof metallic resilient material has a cir the blade. By this arrangement, each of the cut ting blades is resiliently mounted and carried by the rotor for rotation therewith.

Referring again to'Figure 12, it will be seen that the lots 82 extend from the opposite ends one end and half from the other end, the slots in each of the two end sets being spaced at equal circumferential angles, and they slots of the two sets being alternated or staggered with respect to each other. By this means, the coiled and angulated portions of the spring holders may be inserted in the slots from the ends thereof and shoved axially upon the shaft, being retained thereon as by a collar or cap plate 94, which in turn is secured as by fastening screws 96 to thereby lock the cylindrical hubs of the resilient blade holders together in endwise alignment.

From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous modifica ing base and operating means for a rotor, a rotor adapted to be mounted on the base and actuated by the operating means, including a shaft, a drum mounted on said shaft, a plurality of blades mounted on said drum for rotation therewith, said blades being displaced on said drum at equal axial and circumferential intervals with respect to each other, said drum having circumferentiallyspaced axially extending slots, a plurality of arms, each embracing said drum and having one end anchored in one of said slots, said blades each being mounted on the other end of one of said arms.

2. The combination of claim 1 wherein said arms consist of resilient metal straps.

THOMAS C. RUSH.

References Cited in the file of this patent UNITED STATES PATENTS Number

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