CA2080800A1 - Pump and applicator for drywall filler - Google Patents
Pump and applicator for drywall fillerInfo
- Publication number
- CA2080800A1 CA2080800A1 CA 2080800 CA2080800A CA2080800A1 CA 2080800 A1 CA2080800 A1 CA 2080800A1 CA 2080800 CA2080800 CA 2080800 CA 2080800 A CA2080800 A CA 2080800A CA 2080800 A1 CA2080800 A1 CA 2080800A1
- Authority
- CA
- Canada
- Prior art keywords
- pump
- applicator
- filler
- spreader
- slot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000945 filler Substances 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000007654 immersion Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Landscapes
- Coating Apparatus (AREA)
Abstract
A gear-type pump for immersion in a container of drywall filler. A drive shaft is operatively connected to the pump and extends above the container. A motor is operatively connected to the shaft above the container. A conduit has an inlet connected to the pump and an outlet above the container. A spreader is connectedto the outlet of the conduit and has a slot therein for passing strips of material to be coated with the filler. Pinch rollers are mounted near the spreader for moving the strips through the slot.
Description
20~0~
PU~IP AND APPLICATOR FOR DRYWALL FILLER
BACKGROUND OF THE INVEN~ON
1. Field of the Invention This invention relates to pumps for paste-like drywall filler and to applicatorsassociated with such pumps for coating drywall tape and other types of strips.
PU~IP AND APPLICATOR FOR DRYWALL FILLER
BACKGROUND OF THE INVEN~ON
1. Field of the Invention This invention relates to pumps for paste-like drywall filler and to applicatorsassociated with such pumps for coating drywall tape and other types of strips.
2. Description of Related Art In conventional drywall construction, strips of paper or sometirnes other materials, such as glass fibre mesh, are used to cover joints between adjacent panels.
Other strips, either rigid or flexible, are used at corners. Such strips are coated with the common paste-like drywall filler, commonly known as "mud", and are then positioned over the particular joint to be finished.
Manually coating the tape or other strips can be a relatively slow job which occupies a considerable percentage of the time it takes to finish drywall. For this reason, various devices have been developed in the past to automate the job of coating tape or other strips with filler. An example is found in the United States Patent No.
4,202,288 to Davy which discloses a drywall tape dispenser/mud applicator including pinch rolls for pulling the coated tape from the applicator opening.
United States Patent No. 4,996,941 to Mills discloses an applicator for coating tape with drywall mud where the coated tape is wound on a second spool.
United States Patent No. 2,594,48~ to Olden shows a system for applying a 25 liquid to a moving strip of material using a motor driven pump and a motor driven -roll. Fluid is applied at a rate proportional to the speed of the moving strip.
In United States Patent No. 2,779,307 to Foresta, there is a special hopper for adhesive or cement which is applied to a tape.
United States Patent No. 4,757,783 to Matheny shows a system t`or pulling tape through a slot in the bottom of a bucket of mud.
All of the above patents which relate to applicators for coating drywall tape with mud have one thing in common. They all require that the tape be pulled along the bottom of the container of drywall mud. The tape must be pulled through the bottom of the container to utilize the last of the mud when the container is nearly empty. In some cases, this leads to a tortuous path for the drywall tape past rollers and the like, extending downwardly from above the surface of the mud to the bottom of the mud and them back up above the surface again. Pulling the tape through such a lengthy and convoluted path can be difficult whether done manually or by motor.
The apparatus can be quite complicated, thus giving rise to an increased likelihood of operational problems.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved applicator for coating drywall tape and strips of other material with drywall filler wherein the slripS of material are drawn in a relatively short path through the filler, thus reducing the etfort needed to pull the strips.
It is another object of the invention to provide an improved pump for drywall fillers suitable for use with an applicator for drywall tape or for pumping drywall filler or similar materials to a point of application.
It is a further object of the invention to provide an improved pump for drywall filler and an applicator for coating drywall tape with filler which are of simple, rugged construction and efficient in operation.
In accordance with these objects, one aspect of the invention provides a drywall filler applicator including a pump having a conduit extending upwardly therefrom. A spreader is connected to the conduit and has a slot therethrough. Strips 2a~0~l~v of the material to be coated with the filler are passed through the slot in the spreader, while the pump pumps the filler through the conduit.
A second aspect of the invention provides a container with paste-like drywall S filler therein. A gear-type pump is within the container and is immersed in the filler.
A drive shaft is operatively connected to the pump and extends above the container.
A motor is operatively connected to the shaft above the container. A conduit has an inlet connected to the pump and an outlet above ~he container.
BRIEF DESCRlPTION OF THE I~RAWINGS
Fig. 1 is a side elevation of a combina~ion of a container with drywall filler therein, a pump within the container immersed in the filler, a conduit extendingupwardly from the pump with a drywall tape dispenser and drywall filler applicator mounted at the top of the conduit;
Fig. 2 is an enlarged end elevation of the upper portion of the conduit, tape dispenser, drywall filler applicator and the drive train for the pinch rollers thereof;
Fig. 3 is a top view thereof;
Fig. 4 is an isometric view of a straight gate for the spreader of the drywall filler applicator;
Fig. 5 is an isometric view of a V-shaped gate for the applicator;
Fig. 6 is an isometric view of a curved gate for the applicator; and Fig. 7 is a bottom view of the pump.
2 ~
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring first to Fig. 1, container 10 is in a form of a bucket in this examplealthough other large, open topped containers could be substituted. A special container is not required as for some prior art. The container has paste-like drywall filler 12 therein. The filler is conventional and generally plaster-like. A gear-type pump 14 is located in the container near the bottom. It has a pair of rotatable gears 16 and 18 therein as shown in Fig. 7. Pump 14 is a comentional sump pump for an internal combustion engine in this embodiment which is employed because of its rugged 10 construction, low price and suitability for the purpose. However, other types of pumps could be substituted. The pump is driven by a power train consisting of a shaft 20 connected to gear 16 and extending upwardly to a position above the container 10. An electric drill 22, shown in ghost in Fig. 3, engages top 24 of the shaft to drive the pump.
A conduit 26 is connected to outlet 28 of the pump and extends upwardly therefrom to a position above the container. The conduit in this case is a metal pipe, although plastic pipes or hoses could be used instead. There is a clip 11 on theconduit for engaging the top of the container. The top 30 of the pipe is connected to 20 pipes 27, 29 and 31, shown in Fig. I and 3, the latter being connected to a spreader 32 extending horizontally at the outlet thereof. The spreader includes a pipe 33, which is best shown in Fig. 4, which has an open end 37 so excess filler can drop back into the container. A plate 41 is connected to the tront of the pipe. A gate 34 is slidably received in front of the spreader and is held in a desired position by bolts 25 36 and 38, equipped with washers 49 and 51, which are threadedly received in plate 41. A horizontal plate 39 is connected to the pipe and spaced-apart therefrom to form a slot 35 below the pipe and gate. Sides 40, on each side of the plate closes the sides of the slot.
A pair of rubber pinch rollers 42 and 44 are rotatably mounted on braclcet 48.
As seen in Fig. 2 and 3, top roller 42 has a recessed center portion 46 located between larger diameter outer portions 52 and 54.
'~8~
The rollers are powered by a drive train 60 which~ in this example, is driven off of shaft 20. A worm 62, shown best in Fig. 2 is located on shaft 20 and engages gear 64. Shaft 68 connects gear 64 to a bevel gear 66. Bevel gear 66 engages another bevel gear 70 on axle 71 of roller 44. Roller 42 frictionally engages roller 44. Thus, both rollers are rotated when drill 22 rotates shaft 20.
A tape dispenser 72 is mounted on to~ 30 of conduit 26~ In this example it is cradle like, having a side 74, the opposite side being formed by pipe 29. There are end members 76 and 80 which are pipes in the il!ustrated example~ Rollers 73and 75 form the bottom of the dispenser. A roll of drywall tape 82, shown in ghost in Fig.l, is rotatably mounted on the spindle. Free end 84 of the tape extends through slot 35 and between pinch rollers 42 and 44. The applicator may also include means for preventing rotation of the drill 22 for hands-free operation, althoughalternatively the drill could be held by hand when the pump is operated. The means could simply be a fork shaped to receive one of the handles 94 of the drill 22. An elongated coil spring could form a loop about the drill to hold it in position.
Operation In operation, the pump is placed in the container which is filled with drywall filler. Drill 22 is operated to rotate shaft 20 and thereby gears 16 and 18 of pump 14. This pumps the filler upwardly through conduit 26 and then through spreader 32.
Rotation of shaft 20 rotates worm 62, gear 64, shaft 68, bevel ge~rs 66 and 70, roller 44 and also roller 42. The pinch rollers pull the tape through the slot 35 in the spreader, thus coating the upper surface of the tape with drywall filler 12 as best understood from Fig.l. The recessed center portion 46 in the top roller allows clearance for the filler so it is not squeezed off by the rollers as the tape is pulled through. After a required length of tape has been coated, it can be cut off and placed in a bucket strapped to the worker's waist and then carried to the position where it is to be applied.
2 ~
Alternatives and Variations The apparatus can be used as a pump for other purposes besides coating - drywall tape. For example, it can also be used for coating the metal strips commonly used to make corners. Fig. 5 shows a V-shaped gate 98 which can be used on the spreader in place of gate 34. A right angle corner strip can then be pulled through the slot under the gate and the inside is there~y coated with filler. The pinch rollers and tape dispenser are removed in this instance. Alternatively, a gate with an inverted V shape on the bottom thereof can be used to coat the outside of a right angle corner section.
Fig. 6 shows a gate 101 with a convex bottom used for coating the inside of a round corner section. Other shaped gates may be used for other shapes of strips.
While an electric drill is used as a motor for this embodiment, other types of motors could be used, such as a standard electric motor coupled to shaft 20.
Alternative means can be used to drive the pinch rollers. For example, they could be coupled to a separate electric motor. Alternatively, they could be driven by a turbine powered by the mud flowing through conduit 26.
Furthermore, the spreader and pinch rollers can be removed and the device can be used as a pump for pumping drywall filler or similar materials. There arereleasable O-ring connectors 100 and 102, shown in Fig. 2 and 3, which connect pipes 27, 29 and 31 to conduit 26 and spreader 32, respectively. The pipes can be pulled away from these connectors and some other conduit connected to conduit 26instead. A hose can be connected to the end of the conduit which may be connected to other tools such as the type of applicator known as a "bazookan.
It will be understood by someone skilled in the art that many of the details given above are by way of example only and are not intended to limit the scope of the invention which is to be interpreted with reference to the following claims.
Other strips, either rigid or flexible, are used at corners. Such strips are coated with the common paste-like drywall filler, commonly known as "mud", and are then positioned over the particular joint to be finished.
Manually coating the tape or other strips can be a relatively slow job which occupies a considerable percentage of the time it takes to finish drywall. For this reason, various devices have been developed in the past to automate the job of coating tape or other strips with filler. An example is found in the United States Patent No.
4,202,288 to Davy which discloses a drywall tape dispenser/mud applicator including pinch rolls for pulling the coated tape from the applicator opening.
United States Patent No. 4,996,941 to Mills discloses an applicator for coating tape with drywall mud where the coated tape is wound on a second spool.
United States Patent No. 2,594,48~ to Olden shows a system for applying a 25 liquid to a moving strip of material using a motor driven pump and a motor driven -roll. Fluid is applied at a rate proportional to the speed of the moving strip.
In United States Patent No. 2,779,307 to Foresta, there is a special hopper for adhesive or cement which is applied to a tape.
United States Patent No. 4,757,783 to Matheny shows a system t`or pulling tape through a slot in the bottom of a bucket of mud.
All of the above patents which relate to applicators for coating drywall tape with mud have one thing in common. They all require that the tape be pulled along the bottom of the container of drywall mud. The tape must be pulled through the bottom of the container to utilize the last of the mud when the container is nearly empty. In some cases, this leads to a tortuous path for the drywall tape past rollers and the like, extending downwardly from above the surface of the mud to the bottom of the mud and them back up above the surface again. Pulling the tape through such a lengthy and convoluted path can be difficult whether done manually or by motor.
The apparatus can be quite complicated, thus giving rise to an increased likelihood of operational problems.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an improved applicator for coating drywall tape and strips of other material with drywall filler wherein the slripS of material are drawn in a relatively short path through the filler, thus reducing the etfort needed to pull the strips.
It is another object of the invention to provide an improved pump for drywall fillers suitable for use with an applicator for drywall tape or for pumping drywall filler or similar materials to a point of application.
It is a further object of the invention to provide an improved pump for drywall filler and an applicator for coating drywall tape with filler which are of simple, rugged construction and efficient in operation.
In accordance with these objects, one aspect of the invention provides a drywall filler applicator including a pump having a conduit extending upwardly therefrom. A spreader is connected to the conduit and has a slot therethrough. Strips 2a~0~l~v of the material to be coated with the filler are passed through the slot in the spreader, while the pump pumps the filler through the conduit.
A second aspect of the invention provides a container with paste-like drywall S filler therein. A gear-type pump is within the container and is immersed in the filler.
A drive shaft is operatively connected to the pump and extends above the container.
A motor is operatively connected to the shaft above the container. A conduit has an inlet connected to the pump and an outlet above ~he container.
BRIEF DESCRlPTION OF THE I~RAWINGS
Fig. 1 is a side elevation of a combina~ion of a container with drywall filler therein, a pump within the container immersed in the filler, a conduit extendingupwardly from the pump with a drywall tape dispenser and drywall filler applicator mounted at the top of the conduit;
Fig. 2 is an enlarged end elevation of the upper portion of the conduit, tape dispenser, drywall filler applicator and the drive train for the pinch rollers thereof;
Fig. 3 is a top view thereof;
Fig. 4 is an isometric view of a straight gate for the spreader of the drywall filler applicator;
Fig. 5 is an isometric view of a V-shaped gate for the applicator;
Fig. 6 is an isometric view of a curved gate for the applicator; and Fig. 7 is a bottom view of the pump.
2 ~
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring first to Fig. 1, container 10 is in a form of a bucket in this examplealthough other large, open topped containers could be substituted. A special container is not required as for some prior art. The container has paste-like drywall filler 12 therein. The filler is conventional and generally plaster-like. A gear-type pump 14 is located in the container near the bottom. It has a pair of rotatable gears 16 and 18 therein as shown in Fig. 7. Pump 14 is a comentional sump pump for an internal combustion engine in this embodiment which is employed because of its rugged 10 construction, low price and suitability for the purpose. However, other types of pumps could be substituted. The pump is driven by a power train consisting of a shaft 20 connected to gear 16 and extending upwardly to a position above the container 10. An electric drill 22, shown in ghost in Fig. 3, engages top 24 of the shaft to drive the pump.
A conduit 26 is connected to outlet 28 of the pump and extends upwardly therefrom to a position above the container. The conduit in this case is a metal pipe, although plastic pipes or hoses could be used instead. There is a clip 11 on theconduit for engaging the top of the container. The top 30 of the pipe is connected to 20 pipes 27, 29 and 31, shown in Fig. I and 3, the latter being connected to a spreader 32 extending horizontally at the outlet thereof. The spreader includes a pipe 33, which is best shown in Fig. 4, which has an open end 37 so excess filler can drop back into the container. A plate 41 is connected to the tront of the pipe. A gate 34 is slidably received in front of the spreader and is held in a desired position by bolts 25 36 and 38, equipped with washers 49 and 51, which are threadedly received in plate 41. A horizontal plate 39 is connected to the pipe and spaced-apart therefrom to form a slot 35 below the pipe and gate. Sides 40, on each side of the plate closes the sides of the slot.
A pair of rubber pinch rollers 42 and 44 are rotatably mounted on braclcet 48.
As seen in Fig. 2 and 3, top roller 42 has a recessed center portion 46 located between larger diameter outer portions 52 and 54.
'~8~
The rollers are powered by a drive train 60 which~ in this example, is driven off of shaft 20. A worm 62, shown best in Fig. 2 is located on shaft 20 and engages gear 64. Shaft 68 connects gear 64 to a bevel gear 66. Bevel gear 66 engages another bevel gear 70 on axle 71 of roller 44. Roller 42 frictionally engages roller 44. Thus, both rollers are rotated when drill 22 rotates shaft 20.
A tape dispenser 72 is mounted on to~ 30 of conduit 26~ In this example it is cradle like, having a side 74, the opposite side being formed by pipe 29. There are end members 76 and 80 which are pipes in the il!ustrated example~ Rollers 73and 75 form the bottom of the dispenser. A roll of drywall tape 82, shown in ghost in Fig.l, is rotatably mounted on the spindle. Free end 84 of the tape extends through slot 35 and between pinch rollers 42 and 44. The applicator may also include means for preventing rotation of the drill 22 for hands-free operation, althoughalternatively the drill could be held by hand when the pump is operated. The means could simply be a fork shaped to receive one of the handles 94 of the drill 22. An elongated coil spring could form a loop about the drill to hold it in position.
Operation In operation, the pump is placed in the container which is filled with drywall filler. Drill 22 is operated to rotate shaft 20 and thereby gears 16 and 18 of pump 14. This pumps the filler upwardly through conduit 26 and then through spreader 32.
Rotation of shaft 20 rotates worm 62, gear 64, shaft 68, bevel ge~rs 66 and 70, roller 44 and also roller 42. The pinch rollers pull the tape through the slot 35 in the spreader, thus coating the upper surface of the tape with drywall filler 12 as best understood from Fig.l. The recessed center portion 46 in the top roller allows clearance for the filler so it is not squeezed off by the rollers as the tape is pulled through. After a required length of tape has been coated, it can be cut off and placed in a bucket strapped to the worker's waist and then carried to the position where it is to be applied.
2 ~
Alternatives and Variations The apparatus can be used as a pump for other purposes besides coating - drywall tape. For example, it can also be used for coating the metal strips commonly used to make corners. Fig. 5 shows a V-shaped gate 98 which can be used on the spreader in place of gate 34. A right angle corner strip can then be pulled through the slot under the gate and the inside is there~y coated with filler. The pinch rollers and tape dispenser are removed in this instance. Alternatively, a gate with an inverted V shape on the bottom thereof can be used to coat the outside of a right angle corner section.
Fig. 6 shows a gate 101 with a convex bottom used for coating the inside of a round corner section. Other shaped gates may be used for other shapes of strips.
While an electric drill is used as a motor for this embodiment, other types of motors could be used, such as a standard electric motor coupled to shaft 20.
Alternative means can be used to drive the pinch rollers. For example, they could be coupled to a separate electric motor. Alternatively, they could be driven by a turbine powered by the mud flowing through conduit 26.
Furthermore, the spreader and pinch rollers can be removed and the device can be used as a pump for pumping drywall filler or similar materials. There arereleasable O-ring connectors 100 and 102, shown in Fig. 2 and 3, which connect pipes 27, 29 and 31 to conduit 26 and spreader 32, respectively. The pipes can be pulled away from these connectors and some other conduit connected to conduit 26instead. A hose can be connected to the end of the conduit which may be connected to other tools such as the type of applicator known as a "bazookan.
It will be understood by someone skilled in the art that many of the details given above are by way of example only and are not intended to limit the scope of the invention which is to be interpreted with reference to the following claims.
Claims (14)
1. A drywall filler applicator, comprising:
a pump having a conduit extending upwardly therefrom; and a spreader connected to the conduit and having a slot therethrough, whereby strips of material to be coated with a filler are passed through the slot in thespreader while the pump pumps the filler through the conduit.
a pump having a conduit extending upwardly therefrom; and a spreader connected to the conduit and having a slot therethrough, whereby strips of material to be coated with a filler are passed through the slot in thespreader while the pump pumps the filler through the conduit.
2. An applicator as claimed in claim l, wherein the spreader has a straight slot.
3. An applicator as claimed in claim 2, wherein a dispenser for drywall tape is mounted on the applicator in a position such that tape unrolled from the dispenser can pass through the slot in the spreader.
4. An applicator as claimed in claim 3, wherein pinch rollers are rotatably mounted on the applicator adjacent the slot in the spreader in a position to engage tape unrolled from the dispenser.
5. An applicator as claimed in claim 4, having means for rotating the pinch rollers.
6. An applicator as claimed in claim 5, wherein the pump has a drive train, the means for rotating the pinch rollers being operatively connected to the drive train of the pump.
7. An applicator as claimed in claim 4, wherein at least one of the pinch rollers has a recessed center portion to permit filler on the tape to pass between the rollers.
8. An applicator as claimed in claim 1, wherein the slot has a V-shaped edge for applying filler to rectilinear corner members.
9. An applicator as claimed in claim 1, wherein the slot has a curved edge for applying filler to round corners.
10. In combination:
a container with paste-like drywall filler therein, a gear-type pump within the container and immersed in the filler, a drive shaft operatively connected to thepump and extending above the container, a motor operatively connected to the shaft above the container, and a conduit having an inlet connected to the pump and an outlet above the container.
a container with paste-like drywall filler therein, a gear-type pump within the container and immersed in the filler, a drive shaft operatively connected to thepump and extending above the container, a motor operatively connected to the shaft above the container, and a conduit having an inlet connected to the pump and an outlet above the container.
11. A combination as claimed in claim 10, wherein a spreader is connected to theoutlet of the conduit and has a slot therein for passing strips of material to be coated with the filler.
12. A combination as claimed in claim 11, further including pinch rollers mounted near the spreader for moving the strips through the slot.
13. A combination as claimed in claim 12, further including motorized means for rotating the pinch rollers.
14. A drywall filler applicator for drywall tape, comprising:
a gear-type pump near the bottom of the apparatus, the pump having an outlet;
a conduit connected to the outlet of the pump and having an outlet above the pump;
a spreader near the outlet of the conduit and having a straight slot therein;
pinch rollers mounted on the applicator adjacent the spreader;
a motorized drive operatively connected to the pinch rollers;
a dispenser for rolls of drywall tape mounted near the spreader;
a drive shaft connected to the pump and extending upwardly therefrom; and a motor operatively connected to the shaft above the pump.
a gear-type pump near the bottom of the apparatus, the pump having an outlet;
a conduit connected to the outlet of the pump and having an outlet above the pump;
a spreader near the outlet of the conduit and having a straight slot therein;
pinch rollers mounted on the applicator adjacent the spreader;
a motorized drive operatively connected to the pinch rollers;
a dispenser for rolls of drywall tape mounted near the spreader;
a drive shaft connected to the pump and extending upwardly therefrom; and a motor operatively connected to the shaft above the pump.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US77793091A | 1991-10-17 | 1991-10-17 | |
| US777,930 | 1991-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2080800A1 true CA2080800A1 (en) | 1993-04-18 |
Family
ID=25111732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2080800 Abandoned CA2080800A1 (en) | 1991-10-17 | 1992-10-16 | Pump and applicator for drywall filler |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2080800A1 (en) |
-
1992
- 1992-10-16 CA CA 2080800 patent/CA2080800A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |