US 3381861 A
Description (OCR text may contain errors)
y 7, 1968 R. H. STEIN 3,381,861
GUN FOR APPLYING ADHESIVES TO SURFACES Filed July 6, 1966 INVENTOR- ROY STE/N ATTORNEY United States Patent 3,381,861 GUN FOR APPLYENG ADHESEVES T0 SURFACES Roy H. Stein, 3924) Zephyr St, Wheat Ridge, Colo. 80033 Filed July 6, 1966, Ser. No. 563,180 4 Claims. (Cl. 222-256) ABSTRACT OF THE DISCLOSURE A gun for applying adhesives to surfaces either in spaced apart Spots or in continuous strips on surfaces, provided with means for preventing oozing of the compound out of the applicator orifices between spot applications and at the end of the applying operation. The gun comprises a hollow tube or casing, a compound cartridge releasably positioned in the casing, a hollow elongated vertical handle communicating with the casing, a plunger tube slidable in the vertical handle and a plunger rod slidable in the plunger tube, the plunger tube being accessible through the vertical handle, the rod being provided with a horizontal handle on its upper end and a foot on its lower end extending into the compound cartridge. The gun includes means on the vertical handle and plunger tube for moving the tube downwardly so the foot bears on the compound, and manually operable means for releasing the plunger tube to prevent oozing of compound.
This invention relates to a gun for applying adhesive compounds to surfaces such as floors, walls, roofs and the like for the purpose of installing tile, linoleum, shingles and other surface coverings thereon.
The main object of the invention is to provide an applicator which is simple in construction and efiicient for applying adhesive or other plastic compounds either in spaced apart spots or in continuous strips on a surface.
Another object is to provide means in the applicator for preventing oozing of the compound out of the ap plicator orifices between spot applications and at the end of the adhesive applying operation.
Other objects and advantages of the invention will be apparent from the drawings and following description.
In the drawings:
FIG. 1 is an elevational side view of an adhesive gun embodying my invention.
FIG. 2 is a horizontal sectional view on an enlarged scale in the plane of the line 2-2 of FIG. 1.
FIG. 3 is a vertical sectional view, on an enlarged scale, of a portion of the apparatus shown in FIG. 1.
FIG. 4 is a transverse horizontal sectional view on an enlarged scale in the plane of the line 44 of FIG. 1.
FIG. 5 is a vertical sectional view of the pump construction in the plane of the line 55 of FIG. 4.
FIG. 6 is a horizontal sectional view of the pump mechanism, in the plane of the line 66 of FIG. 5.
In the embodiment of the invention shown in the drawings, the adhesive gun or applicator comprises a semicylindrical hollow cartridge containing tube or casing 10 provided with a base plate 11 mounted by a hub 12 on a pipe nipple 13. A circular cap 14 is fixedly secured to the upper end of the tube 10, and the hub 15 of the top cap has mounted therein by screw threads a pipe member 16.
The handle 17 is a hollow tubular member provided with a grip portion 18 at its upper end and a housing 19 integral with its lower end. The housing 19 is connected to the upper threaded end of the pipe member 16. Extending longitudinally through the vertical portion of the handle 17, through the housing 19 and pipe member 16, is a slidable plunger tube 20 which projects downwardly into the cartridge containing tube 10. A plunger 3,381,861 Patented May 7, 1968 rod 21 with grip portion 22 is slidable within the plunger tube 20, the handle 17 and tube 20 being provided with a vertically extending slot 23 which permits the grip portion 22 to protrude from the slot when the plunger rod 21 is moved up or down.
The lower end of the plunger rod 21 has fixed thereon a plunger foot 24 and a suction cup 25 located within the foot 24. A plunger spring 26 is coiled about the plunger rod 21 and bears at opposite ends on the foot 24 and the plunger tube 20. A fiat bottom flanged circular dish shaped member 27 rests on the adhesive or other compound 28 in a cartridge 29 which fits within the semicylindrical tube 10.
The cartridge 29 is clamped into place within the tube 10 by a cartridge hold-down rod 30 with clip 31 and hold-down spring 32 in bracket 33 on tube 10, the clip bearing on the upper edge of the cartridge 29 as shown in FIG. 3.
Within the housing 19 is a plunger release member 35 provided with an inner end 36 and an outer end 37. The inner end 36 engages a notch 38 in the housing wall. The plunger release member 35 is apertured to fit around the plunger tube 20 to clamp the tube while the member 35 is in unreleased position. The outer end 37 extends beyond the housing 19 for manual release of the member 35. A plunger rod feed washer 39 is mounted on the plunger tube 20 and retained between coils of a plunger feed spring 40. The washer 39 serves as a holding clamp on the plunger tube 20. The upper end of the spring 40 bears against the plunger release member 35 and the lower end bears on the bottom of the housing 19.
A plunger lever 41 having an inner end 42 is pivotally mounted near said end on a pin 43 in the housing 19, with the end 42 bearing on the feed washer 39. A rigid grip arm 44 projects from the handle 17 above the lever 41 for cooperation with the lever.
The pipe 13 communicates with the interior of the cartridge 29 for passage of the compound 28 through the pipe 13 into a metering pump 45. A wheel 46 supports the pump and functions to actuate the pump vanes to dispense a predetermined amount of the compound 28. The compound 28 passes through the pump to an orificed tabber shoe 47 which may be shaped to apply compound to spaced apart spots or to continuous strips on a surface. The tabber shoe is mounted in the pump by a pin 48. A shield 49 is mounted on the shoe 47 between its applicator end and the pump 45. The construction of the pump may vary as desired for applying compound at spaced locations or in continuous strip.
The operation of the device is as follows: The plunger rod 21 is raised to the FIG. 1 position and then a cartridge 29 containing adhesive or other compound is placed on the base plate 11 through the open side of the semi-cylindrical tube 10, and is firmly held in position therein by the clip 31 of the clamping rod 30 bearing on the upper edge of the cartridge. The dish shaped follower 27 is placed on top of the compound 28 in the cartridge. Plunger rod is pushed down to top of compound in cartridge. The lever 41 is manipulated by gripping the lever and the rigid grip member 44 above it, and squeezing the lever toward the grip member as needed to cause the lever end 42 to bear down on the washer 39 and spring 40, thereby moving the plunger tube 20 and plunger rod 21 downwardly and causing the plunger foot 24 to bear on the dish member 27 to press the compound down into the applicator pump.
To stop the flow of material through the pump between applications or at the end of the operation, the operator depresses the plunger release member 35 by bearing down on the end 37. This releases the hold of the member 35 on the plunger tube 20, and due to the expansible urging of the spring 26, the suction cup 25 and foot 24 together with the plunger rod 21 and tube 20 are raised, thereby relieving pressure on the compound and stopping the flow of material and any tendency to ooze out through the applicator shoe.
The vanes 50 in the pump may be located to cause the shoe 47 to dispense small daubs of the compound every six inches, for example, as desi'ed, but this construction may be varied for different applications. The wheel 46 on pump shaft 51 rotates the pump mechanism as the wheel travels over a surface, and thus controls the placement of adhesive material where desired.
Changes may be made in details of construction and arrangement of parts without departing from the scope of the invention as defined by the appended claims.
1. An adhesive gun for applying compounds to surfaces comprising (a) a hollow open sided casing having an apertured base plate and an apertured top cap spaced from the base plate,
(b) a compound container releasably positioned in the casing on said base plate,
(c) a hollow elongated slotted vertical handle communicating with the casing,
(d) a plunger tube slidable in the handle extending from the upper end of the handle downwardly through the top cap into the compound container, said tube being slotted in register with the slot in the vertical handle,
(e) a plunger rod slidable in the plunger tube, said rod being provided with a handle on its upper end projecting from the plunger tube to slide in the slots of the tube and vertical handle, said rod extending downwardly into the compound container.
(f) a foot on the plunger rod for bearing on compound in the container,
(g) manually operable cooperating means on the vertical handle and plunger tube accessible through the handle for moving the plunger tube and plunger rod downwardly and causing the plunger foot to press compound out of the container,
(h) a metering pump connected to the casing in communication with the compound container, and
(i) an orificed dispenser shoe on the pump for applying compound to a surface,
2. The adhesive gun defined by claim 1, in which the manually operable cooperating means on the vertical handle and plunger tube include a hollow housing formed in the vertical handle, a plunger release plate mounted on the plunger tube in said housing, said plate having one end pivotally mounted in the housing and a free end projecting from the housing, and resilient means normally holding the plunger release plate in unreleased position on the plunger tube.
3. The adhesive gun defined by claim 1, in which the means on the handle and on the plunger tube for moving the plunger tube and plunger rod downwardly comprises a clamping washer on the plunger tube and a pivotally mounted lever on the handle, actuation of the lever causing the lever to bear on the clamping washer to move the plunger tube and rod downwardly.
4. The adhesive gun defined by claim 1, which includes a plunger release plate tiltably mounted in the handle and having a free end, said plate engaging and clamping the plunger tube, a coiled spring on the plunger tube normally holding the release plate in clamping position, depression of the free end of the release plate serving to release its hold on the plunger tube and to thereby relieve pressure by the plunger rod foot on the compound to prevent oozing of the compound through the pump shoe orifices.
References Cited UNITED STATES PATENTS 1,737,783 12/1929 Butler 222-256 1,894,274 1/1933 Jacques 222-256 2,070,206 2/1937 Hudson 222327 X 2,350,683 6/1944 Jossim et al. 103-161 2,602,570 7/ 1952 Sherbondy 222-327 3,070,263 12/1962 McMullen 222--177 3,211,103 10/ 1965 Kiekhaefer 103 117 ROBERT B. REEVES, Primary Examiner.
N. L. STACK, Assistant Examiner.