US2551105A

US2551105A - Tool for use on plaster or the like

Info

Publication number: US2551105A
Application number: US100172A
Authority: US
Inventors: Leslie J Eiden; Clifford R Magers
Original assignee: ROBERT L HOFFMANN
Current assignee: ROBERT L HOFFMANN
Priority date: 1949-06-20
Filing date: 1949-06-20
Publication date: 1951-05-01
Anticipated expiration: 1968-05-01

Description

May 1, 1951 J. EIDEN ETAL Toor.r EoR UsE oN PLAsTER 0E THE LIKE Filed June 20, 1949 IN VEN TORS ets/e J: Ya/en Patented May l, 1951 TOOL FOR USE ON PLASTER O THE LIKE Leslie J. Eiden, Los. Angeles, and Clifford R. Magers, Tarzana, Calif.; said Eiden assignor to Robert L. Hoffmann, San Jose, Calif.

Application June 20, 1949, Serial No. 100,172

l6 Claims.

about or surfaces are developed or established. 1Q

For certain operations floats having faces `of sponge rubber have been used and found very satisfactory. Floatsof this type have heretofore involved a board or plate with a sheath of sponge rubber applied thereto by an adhesive, or theV ll like. and in practice this type of construction has not proved altogether satisfactory.

The present invention provides, generally, a plaster working tool characterized by a head, a

handle and means coupling the handleto the head, the head being formed of a body of sponge rubber, or the like, having a foraminous metal plate embedded therein. The handle is of simple form involving a grip and standards projecting i line 2-.-2 on Fig. l.

tional View taken as indicated by line 3 3 on Fig.

y which description reference is made to the accompanying drawings, in which:

Fig. 1 is a perspective view of the tool embodying the present invention. Fig. 2 is a vdetailed sectional View taken substantially as indicated by Fig. 3 is a transverse sec- 2. Fig. 4 is a plan section taken substantially as indicated by line 4-4 on Fig. 2. Fig. 5 is a View similar to Fig. 3, showing the tool after extensive use or following removal of a part of the body to expose the metal core, and Fig. 6 is anend view of the tool showing the head in a deformed condition.

The tool provided by the present invention involves, generally, a head or working element A characterized by a body l of sponge rubber, or the like, and a foraminous metal core Il within the body, a handle B characterized by a grip l2 and standards I3, and means C coupling the head A and the handle B, which means is characterized by posts I4 projecting from the-head and pins l5 connecting the posts and the handle.

The head A of the tool is the work engaging from the grip to engage the back of the head., element and in accordance with thepresentin- The means coupling the head and handle involves posts anchored to the metal plate that is embedded in the head to project from the back of the head and pins are engaged through eyes on the posts and through bores in the handle and 301 have threaded ends that receive retaining nuts:

It is `a general object of the present invention t0. provide a tool of the general character referred to in which the head has a body of sponge rubber, a

or the like, of suitable size, shape and' thickness, 35

while a foraminous plate or sheet of metal is completely embedded in the body of rubber and is substantially coextensive therewith in order to afford elective backing for the working face of the body -while at the same time being completely 40 protected or shielded by the body.

A further object of the invention is to provide a simple dependable construction serving to effectively couple a handle to a head of the character referred to. The present invention provides a releasable connection or coupling between the head and handle which in no way interferes with free use of the tool and which connects the handle with the core or metal plate within the body of rubber, providing a rigid dependable structure.

The various objects and features of our invention will be fully understoody from the following detailed description of a typical preferred form and application of the invention, throughout vention it is of simple construction and forma.- tion and involves merely the body l0 of sponge rubber or the like and the foraminous plate which is embedded in the body. The body I0 of sponge rubber, or like material, may in practice be of any suitable size or shape, it being preferred ordinarily that it be a rectangular element with a at'bottom or working face 20 and a back face 2| parallel with the working face. The side Vand end edges 22 may be plain and flat, as shown throughout the drawings. The body l0 may vary considerably in thickness, it being preferred generally that the body be of such thickness as to receive the foraminous plate or core Il, as shown throughout the drawings, and so that there is a working section X of the body below the core or between the core and the working face 20' of such thickness as to give the tool the desired body. It is further desirable that there be a'v portion Y of the body I0 above the foraminous core or between the core and the back face 2|, to provide an eiective pad protecting the users hand or fingers from the foraminous core.

The core Il as provided by the present invention is a plate or sheet of metal completely embedded in` the body l0 and in plan configuration it is somewhat smaller than the body IU so that its several edges 25 are spaced inward somewhat from the edges 22 of the body and are thereby protected by the edge portions of the body.

Where it is desired to provide a body I with a flat working face 2D, as shown in Figs. 1 to 3 of the drawings, it is preferred that the core II be a fiat sheet metal body or plate, in which case the portion X of the body between the core and the working face 2() is of uniform thickness throughout. It is to be understod that, if desired. the body A may be other than flat and by empolying a core II of sheet metal the body may be given any desired shape within reasonable limits by simply deeoting or deforming the core, as indicated in Fig. 6 of the drawings.

In carrying out the present invention the core' II is preferably provided with a multiplicity of openings or perforations through it so that it has the general appearance of foraminous sheet metal such as is commonly known as metal lath. It is preferred, however, to employ a core which is somewhat stiffer or heavier than ordinary metal lath, and in the form of the invention illustrated the core is such as to have smooth top and bottom faces 3) and 3 I, respectively. If foraminous metal plates such as are commonly used as metal lath are employed in carrying out the invention, the faces of the core may be rough or irregular.

rIhe body of sponge rubber, or the like, and the foraminous sheet metal core II are permanently combined or joined into a unit by molding, vulcanizing or otherwise handling or treating the material of the body l so that the core II is embedded or incorporated in the body I0 with portions of the body II] occupying and continuing through the perforations of the core to thereby integrally bond the portions X and Y of the body. Through thus embedding the core in the body the parts are united so that the body will not separate or peel from the core as is the case where attempts are made to secure facings of rubber or the like to backings or bodies of metal or wood, through the use of adhesives designed for such purpose.

The handle B has a grip I2 that may be shaped and proportioned to be convenient for the hand of Va. user and the standards I3 of the handle project from the ends of the grip and have enlarged ends or base portions 35 which engage and bear upon the back face 2| of the head A. Itis tol be understood that in practice the handleB may be varied'widely in form and construction and it may be formed either as a unit or as a fabrication emplcyingany suitable material or materials as circumstances require.

The means C Aprovided by the present inventionfc coup-le the handle B with the head A involves two pairs of posts I4 extending from the core II oi the head to project from the back face 2| of the head at points spaced so that the. posts receivey the standards I3 of the handle. In the preferred form of the invention the posts I4 are permanently or integrally joined with the metal core Ii of head A. In the drawings the posts are shown as integral continuations of bars 4I) which are integrally joined to the core I-I by Welding' material 4I.

The posts I4 of each pair are spaced apart to snugly receive a standard I3 of the handle and in the case illustrated an apertured part or eye 53 is provided on the upper end of each post. The standard |31 or handle portion occurring between the posts is provided with a transverse opening or bore 45 and a pin I5 is carried between the eyes of the posts and extends through thebore 45. The vpin is provided at one end with ahead 4E engaging one eye and is threaded at the other end to carry a rretainer A1. The retainer- 6l shown in the drawings is in the form of a wing nut threaded on the pin to engage the eye that occurs at the threaded end of the pin. xThrough the-construction just described the handle is effectively connected or coupled to the head A of the tool and the parts may be proportioned so that the portion Y of sponge rubber beneath the base portions 35 of the handle are compressed somewhat when the handle is coupled to the standards, with the result that the structure is tightand is without clearance beneath the standards of the handle where foreign matter might accumulate.

In -using the tool provided by the present invention it is gripped by the handle B and it may bernanipulated in the manner of an ordinary float to work or handle plaster or other like material. As above pointed out, the head A may be used while nat, as shown in Figs. 1 to 3, or if desired it may be shaped as circumstances require. By employing a sheet metal core Il of material that can be bent or deformed the tool can be bent into and out of various positions at will. It is to be understood, of course, that if desired Pthe core I l may be made of a rigid or heavy material so that it remains fiat and is not subject to deflection. After extensive use of the tool the portion X of the body I0 may be worn down or away, leaving a part or parts of the core II exposed or, if desired, such removal of the body A may be accomplished deliberately in order to expose the core. With the core exposed the tool can be used to advantage as a scratcher or in performing' operations quite different from those ordinarily performed by a float.

Having described only a typical preferred form and application of our invention, We do not wish to be limited or restricted to the Specific details herein set forth, but wish to reserve to ourselves any variations or modifications that may appear to those skilled in the art, and fall within the scope of the following claims.

Having described .our invention, We claim:

i. A tool of the character described including, a head with back and front faces and including, a body of rubber-like material in the form of sponge and a rigid foraminous core in the body and completely covered thereby, and a substantially U-shaped handle having an elongate grip portion and standards at the ends of the grip portion and engaged with the back of the head, the said body having exterior surfaces at the front and back of the head exposed except at the points Where the standards of the handle engage the head.

2. A tool of the character described including, a head with back and front faces and including, a body of rubber-like material in the form of sponge and a rigid foraminous sheet metal core in the body and completely coveredthereby, and a substantially U-shaped handle having an elongate grip portion and standards at the ends of the grip portion and engaged with the back of the head, the said body having exterior surfaces at the front and back ofthe head exposed except at the points where the standards of the handle engage the head, the core being the sole rein-V forcement for the said body.

3. A tool of the character described including, a head with back and front faces and including, a flat body of rubber-like material inthe form of sponge and a rigid foraminous core in the body and completely covered thereby, and a substantially U-shaped handle having an elongate grip portion and standards at the ends of the grip n a head with back and front faces and including,

a body of rubber-like material in the form of sponge and a rigid foraminous core in the body and completely covered thereby, a substantially U-shaped handle having an elongate grip portion and standards at the ends of the grip portion and engaged with the back of the head, the said body having exterior surfaces at the front and back of the head exposed except at the points where the standards of the handle engage the head, and means releasably connecting the handle and head including, posts xed to the core and projecting from the back of the head and removable fasteners connecting the posts and the standards of the handle.

5. A tool of the character described including, a head with back and front faces and including, a body of rubber-like material in the form of sponge and a rigid foraminous core in the body and completely covered thereby, a substantially U-shaped handle having an elongate grip portion and standards at the ends of the grip portion and engaged with the back of the head, the said body having exterior surfaces at the front and back of the head exposed except at the points where the standards of the handle engage the head, and means releasably connecting the handle and head including, posts fixed to the core and projecting from the back of the head and removable fasteners connecting the posts and the standards of the handle, there being two posts at each standard adjacent opposite sides thereof, and each fastener being engaged through a standard and with the posts at opposite sides of the standard.

, 6. A tool of the character described including, a head with back and front faces and including, a body of rubber-like material in the form of sponge and a rigid foraminous core in the body and completely covered thereby, a substantially U-shaped handle having an elongate grip portion and standards at the ends of the grip portion and engaged with the back of the head, the said body having exterior surfaces at the front and back of the head exposed except at the points where the standards of the handle engage the head, and means releasably connecting the handle and head including, posts fixed to the core and projecting from the back of the head and fasteners connecting the -posts and the standards of the handle, there being two posts at each standard adjacent opposite sides thereof, the posts having openings through them at parts opposite the standards and each fastener being a screw fastener with a pin portion slidably engaged through a standard and through the openings of the posts adjacent said standard, a head on one end of the pin portion engaging the post at one side of the said standard, and a nut threaded on the pin portion and engaging the post at the opposite side of said standard.

LESLIE J. EIDEN. CLIFFORD R. MAGERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,825,080 Morford Sept. 29, 1931 2,126,948 Dewhirst Aug. 16, 1938 2,259,653 Mitchell Oct. 21, 1941