US 2874946 A
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Description (OCR text may contain errors)
Feb. 24, 1959 y. A. SINGLETERRY ET'AL 2,
' FLOOR COVERING'STRIPPER Filed 0st. 28, 1955 2 Sheets- Sheet 1 1,, .W 7 J1 2w y Fig 2 Ve rnon A. Single terry Bernard D. Brown JNVENTORS.
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Feb. 24, 1959 v. A. SINGLETERRY ET AL FLOOR COVERING STRIPPER 2 Sheets-Sheet 2 Filed Oct. 28, 1955 Fig.3
U S. m, r R m e n 0 WT a A Mom MI nafV .mBm 0 M in a mm Q2 8 VB 8 2,874,946 FLOOR covnnnscsrmrrnn Vernon A. Singleterry and Bernard D. Brown Rosemead, Calif.
Application October 28, 1955, Serial No. 543,508 1 Claim. (Cl. 262- 13) the market, such as asphalt, rubber, cork and a large group of plastic tiles. The primary object of this invention is to provide a machine which breaks the bond between the floor covering, as linoleum or tile, while the machine is moved a long the floor, thereby removing the floor covering by a chipping or breaking action rather than by a cutting action.
Another object of the invention is to provide a floor stripping machine which removes the floor covering from the original floor or other supporting surface by a rapidly oscillating blade having a blunt chisel edge, for example, a cutting edge at about 15 measured from the vertical, together with knives which work with the cutter to sever the floor covering into strips as it is being released from its bond with the floor surface.
Another object of the invention is to provide on a floor covering removal machine means for guiding the removed linoleum or other covering so that it is rolled ahead of the attendant as he walks the machine forward to strip the floor covering.
These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:
Figure 1 is a perspective view of a machine which embodies the principles of the invention;
Figure 2 is a sectional view taken on the plane of the line 2-2 of Figure 1 and in the direction of the arrows;
Figure 3 is a sectional view taken on the plane of line 33 of Figure 2 and in the direction of the arrows showing particularly the means for oscillating the cutter; and
Figure 4 is a sectional view taken substantially on the plane of line 4-4 of Figure 2 and in the direction of the arrows.
The machine 10 has a handle shank 12 with a handle 14 at one end adapted to be grasped by a walking attendant as he moves the machine 10 forward while it is performing its intended operation. A fork 16 is attached to the lower end of the shank 12 and has trunnions 18 carried by it, the latter mounting the handle for pivotal movement in order to serve as a convenience for the attendant.
Housing 20 having an open bottom and a motor seat 22 bounded by flange 24 is used as a support for the various operative parts of the machine 10. The fork 16 is operable for pivotal movement in wells 26 and 28 4 United States atent ICC 2 formed in the upper part of housing 20 and trunnions 18 are mounted in suitable apertures provided in vertical portions of the housing which serve as walls for the wells 26 and 28.
A motor 30 is disposed in the seat 22 and bounded by the flange 24 at its lower end. The motor may be bolted or fixed in other ways to the housing 20, and has a line cord 32 extending therefrom. This cord passes through the handle shank 12 and is interrupted by a switch convenient tothe attendant. The motor 30 must be capable of reasonably high speed in order that the floor covering may be removed by breaking its bond with the original floor. For example, a speed of about 1450 R. P. M. for a one-quarter horsepower motor is suggested.
Shaft 34 driven by motor 30 is vertically disposed and mounted for rotation in thrust bearings 36 and 38 respectively. 'A bearing support plate 40is secured to and within housing 20 and has an aperturein which the bearing 36 is pressed or otherwise fixed. The lower thrust bearing 38 for shaft 34 is similarly secured in an opening in a lower plate 44, the latter extending across a substantial part of the open bottom of housing 20. Screws 46 or other fasteners hold lower plate 44 secured to housing 20. Wheels 47 and 48 are disposed in openings formed in plate 44, the wheels being mounted on spindles carried by plate 44, housing 20 or both. Wheels 47 and 48 function to support the back part of the machine and form a pivot about which the attendant may rock the machine.
Means for oscillating the cutter 50 are attached to the cutter and are drivingly connected with shaft 34. The preferred means consist of a shuttle 56 that is retained captive in an opening 58 which is formed in the blade support 60. Opening 58 has clearance at the sides of it for the shuttle 56, and there is little or no clearance at the front and rear surfaces of the shuttle which rest on the front and rear walls of opening 58. .An eccentric 62 is pressed, keyed as at 64 or otherwise fixed to shaft 34 for rotation therewith. An antifriction bearing 64 is mounted on the periphery of eccentric 62, and disposed in the seat 66 formed in a central aperture in shuttle 56. In view of the clearance on the sides of shuttle 56, when shaft 34 is rotated, only the fore and aft component of movement is transmitted to the support plate 60, all lateral components being taken up as lost motion in opening 58. Cutter 50 is removahly secured to the support plate 60 by having a portion of it overlap the support plate and by being bolted, as at 68 thereto. I
Means for cutting the linoleum, tile or other floor covering into strips as the machine 10 is actuated are attached to the cutter 50. They comprise a pair of knives 70 and 72 which are mounted at the outer, lateral edges of the cutter 50 and which rise upwardly therefrom. These cutters have their cutting edges terminating forwardly at the leading portion of edge 54.
In operation, the attendant energizes motor 30 by actuation of the switch located convenient to handle 14. As the motor 30 is actuated, shaft 34 rotates in its bearings 36 and 38. This rotation is converted to oscillatory movement of the cutter 50 through the eccentric 62,
shuttle 56 and support plate 60.
The rear portion of the housing 20 is supported on the wheels 47 and 48 and the front portion is supported by having it bear on surface 52 of the cutter 50. Inasmuch as the motor 30 is capable of rather high rates of speed and the edge 54 of the cutter 50 is blunt, the bonding material between the floor covering and the floor surface is cracked and broken as machine 10 is moved forwardly. Once the floor covering is started, that is, a small portion originally removed, surface 52 comes to rest on the original flo'onand'the remainder of the room, corridor or other covered flooring is removed instrips as the bonding material is broken by the oscillation of cutter 50. v
The knives 70 and 72 oscillating with cutter 50 tale vertical cuts in the flodrcovering'thre'by defining the strips which tend to 'roll up the machine 10 as it is moved forward by the attendant.
Thefront surface 74 of housing 20 is convex and coacts with the inner surfaces 76 and 78 of knives 72 and 70 respectively to form a guide for the strips of floor covering that are removed from the original floor. These guidesroll the floor covering-forwardly in front of the attendant and the machine 10 as it is moved during its normal operation.
The foregoing is considered as'illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.
What is claimed as new is as follows:
A composition-floor covering stripping machine/comprising a housing, a driven shaft carried by said housing, means drivingly connected to said driven shaft for breaking the bond between the covering and floor to which it is bonded, said bond breaking means including a blade having a blunt chisel forward edge having a face tilted rearwardly approximately 15 from a vertical reference plane, and a flat original floor contacting surface extending rearwardly from said edge.
References Cited in the file of this patent UNITED STATES PATENTS 437,414 Felmlee Sept. 30, 1890 1,313,597 Hunter Aug. 19, 1919 2,279,454 Fischer Apr. 14, 1942 2,345,425 Phillips- Mar. 28, 1244 2,777,680 Robb Jan. 15, 1957 FOREIGN PATENTS 1,047g5s'9 France July 22, 1953