US 2817931 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
Dec. 31, 1957 Y c, HQUSER 2,817,931
DRY WALL ANGLE SANDER Filed Aug. 16, 1956 INVENTOR. BURDET E c Hous R- United States Paten O.
DRY WALL ANGLE SANDER Burdette C. Houser, Palmdale, Calif.
Application August 16, 1956, Serial No. 604,415
Claims, (Cl. 51-487) This invention relates to sanders and scrapers for plaster and like walls, particularly an angle dry wall sander and the like.
The main object of my invention is to provide an effective tool for sanding the corners and angles of a plaster and like wall to make the wall angle clear and clean and particularly free from irregularities.
Another object of my invention is to provide a sander for smoothing the sides of wall angles on finished dry plaster walls to put the same in final finished condition so that they can be painted.
A further object of this invention is to have a special sander which may be used with a handle of any selected length, and in fact, with one of a set of difierent lengths in order to make it possible to reach not only various parts nearby of the corners in walls, but also higher wall corners and the angles formed by walls and ceilings, etc.
Yet another object of the invention is to have such a sander equipped with means for gripping emery cloth and sand paper in renewable condition so that the sander may be sharp and capable of perfect operation at all times, and not likely to wear out or lose accuracy.
It is, of course a practical object of the invention to make a dry wall angle sander of the character indicated which is simple to use, relatively light in construction, and quickly changed from a long handle to a short handle and vice versa.
An object with a view to economy is also to make such a sander in sufiiciently simple form at low cost in order to encourage wide distribution on the market.
Other objects and advantages of my invention will appear in greater detail as the specification proceeds.
In order to facilitate ready comprehension of this invention for a proper appreciation of the salient features thereof, the invention is illustrated on the accompanying drawing forming part hereof, and in which:
Figure 1 is a vertical transverse section of a sander made according to my invention and embodying the same in a practical form, the section being taken on line 1--1 in Figure 2; and
Figure 2 is a front elevation of the sander as seen from the right in Figure 1.
In these views, the same reference numerals indicate the same or like parts and features.
When plaster walls have been generally formed by plastering, various parts may still require finishing to render them clean cut and proper in appearance, and this is especially true of corners between walls and between the ceiling and the walls, etc. If these corners are manually sanded, considerable labor is required. Consequently, this situation presents a problem, and upon considering this problem, it has occurred to me that a sanding tool should be available to present a sanding surface toward two wall surfaces at an angle simultaneously, while being self-adjusting within a few degrees, so that an equable pressure may be exerted upon both surfaces to obtain a smooth and satisfactory result. As a con- 2,817,931 Patented Dec. 31, 1957 sequence of such consideration, I have succeeded in producing an angle sander along the lines already indicated which will now be described in detail in the following, due reference being bad to the drawing pertaining to the application as already alluded to.
Hence, in the practice of my invention, a pair of flat plates 3 and 4 are hinged together by means of a hinge formed of the two hinge members 5 and 6 secured to the plates and interconnected by means of a hinge pin 7, the hinge being preferably a piano hinge. Upon the ends of the hinge pin are pivotally mounted the two hinging ends 8, 8 of a bracket 9 that extends into a slot 10 between the forked ends 11, 11 of a short pipe or tube 12 which is threaded at its outer end 13. This end is adaptedto be engaged by a long handle having a corresponding thread so as to make it possible for a workman standing on the floor to reach high portions of the walls and the ceiling of a room with the device.
However, the bracket may also be connected at two intermediate points to portions of the hinge pin when 1 the hinge itself is as long as the plates 3 and 4. Bracket 9 is retained in association with short tube 12 by means of a bolt having a head 14 and a nut 15 screwed on the other end, this bolt 16 extending transversely through this tube and ends 11 as well as bracket 9 and allowing the assembly to swivel about bolt 16 when nut 15 is not screwed tight. For the purpose of retaining sand paper or emery cloth upon the device, two features are included. First, the plates are provided with corresponding blocks of sponge rubber 17 and 18 for padding the sand paper, while a pair of sand paper clamps of semicircular split tubes 19 and 20 are secured to these plates by means of clamp screws 21 and 22 extending through the clamps which are secured in place by wing nuts 23 and 24 screwed on these clamp screws 21 and 22. The ends 25 and 26 of a sheet 27 of sand paper are caught under clamps 19 and 20 and nuts 23 and 24 and this sheet disposed externally of the plates and their pads 17 and 18 in effective position to engage against the surfaces of two walls making a more or less right angled juncture when the device is brought into active contact with the wall angles.
On the other hand, in order to ensure that the two plates or wings 3 and 4 with their pads and sandpaper associated therewith are maintained at about apart within a few degrees one way or the other, preferably about 94, to the two plates or wings are secured the ends of two arcuate leaf springs 28 and 29 by means of screws or bolts 30, 30, 31 and 31 provided with spacing nuts 32, 32, etc., and held thereon by outer locking nuts 33, 33, etc. The result is that this pair of leaf springs tend resiliently to determine the angle of plates or wings 3 and 4 with their pads and sandpaper so that the device will automatically fit varying angles of meeting walls and walls with ceilings. Plates or wings 3 and 4 may be made of metal, wood or flat plastic plates, while the other parts such as hinge, bracket, mounting tube, clamps and bolts, screws and nuts may all be of metal, if desired.
The arrangement is such that when a long or medium length pipe or handle is screwed to the end 13 of tube 12 and the device completely assembled as described, the device is readily raised to the ceiling or moved up and down in corners of meeting walls to clean and sharpen the finish of the wall angles, the device meanwhile adjusting itself both as to the actual angles encountered, and also as to position along the walls by virtue of the swiveling effect of the bracket on the bracket screw or bolt 16.
The sanding device may be made larger or smaller and of any desired size and weight, a light weight being desirable and scarcely larger than actually shown on the drawing for common use.
Manifestly, variations may be resorted to, and parts and features may be modified or used without others within the scope of the appended claims.
Having now fully described my invention, I claim:
1. A sander according to the type described, including a pair of angularly related plates or wings hinged together by means of a hinge formed of two hinge members interconnected by means of a hinge pin defining an included angle, a bracket also pivotally connected to the hinge pin within the angle of the two plates and extending a predetermined distance from between the plates away from said hinge pin, a handle mounting connected to the bracket and adapted to have a handle of selected length attached thereto by which to support the sander as a whole in contact with a wall angle or corner, and means for attaching a sheet of sand paper and the like to the plates exteriorly of the angle thereof.
2. A sander according to claim 1, wherein the plates are provided externally with a pair of corresponding pads or resilient material such as sponge rubber and the like to pad the sand paper.
3. A sander according to claim 2, wherein the means for attaching the sand paper includes a pair of clamps individually mounted upon the inner sides of the plates and each including an elongated member and a screw projecting through a portion of the clamp and having an adjusting wing nut upon the screw for tightening the elongated clamp member against the plate to grip the end of the sand paper thereon.
4. A sander according to claim 3, wherein the handle mounting includes a tube member having an open end slot into which the bracket extends and upon the opposite end a thread with which a handle may be engaged in line with said tube member.
5. A sander according to claim 4, wherein at least one arcuate leaf spring is secured at one end to the rear inner portion of one plate and at the other end to a corresponding rear inner portion of the other plate, said spring determining the angle of the plates.
References Cited in the file of this patent UNITED STATES PATENTS 1,501,192 Severus July 15, 1924 1,562,415 Newman Nov. 17, 1925 2,066,829 Erickson Jan. 5, 1937 2,233,565 Whelan Mar. 4, 1941 2,417,356 Field Mar. 11, 1947 2,523,884 Swenson Sept. 26, 1950