Abstract: A portable drywall joint compound pump workstation has a joint compound supply reservoir with an open top and closed bottom removably attached to a wheeled framework. The workstation further has a pump assembly including a pump control removably connected to the framework for pumping joint compound from the supply reservoir to a workstation outlet extending from the pump control. The pump assembly includes a high pressure cylinder connected to a valve and quick coupling arrangement which, in turn, is in communication with the supply reservoir through the bottom end thereof. A discharge line extends between the high pressure cylinder and the pump control for feeding joint compound from the supply reservoir to the pump control. A first discharge port is provided on the pump control for continuously feeding a variety of drywall finishing tools. A second discharge port is provided on the pump control for supplying wash down water to clean tools or act as a source of high pressure fluid.

Abstract: A drywall compound dispensing system for applying drywall compound to a wallboard has a delivery tube for delivering drywall compound entirely therethrough provided with a supply end connected to a source of pressurized drywall compound, and a dispenser end opposite to the supply end connected for pivotal movement with a drywall compound dispensing head. A tandem control lever arrangement is located at the supply end of the delivery tube and is engaged by one hand of the user for supplying manual or continuous flow of drywall compound through the delivery tube, and disabling pivotal movement of the dispensing head.

Abstract: An apparatus is provided for permitting a substantially continuous flow of drywall compound to a wallboard joint. The apparatus includes a delivery tube for delivering drywall compound completely therethrough. The delivery tube has a first end connected to a drywall compound supply assembly fed directly by a source of pressurized drywall compound. The delivery tube also has a second end opposite the first end in communication with a drywall compound dispensing head. A normally closed, pressure sensitive valve arrangement is interposed between the second end of the delivery tube and the dispensing head for controlling the starting and stopping of drywall compound flow between the delivery tube and the dispensing head.

Abstract: A drywall taper is provided for applying drywall compound and tape to a wallboard joint. The drywall taper has an applicator head mounted on one end of a drywall compound storage device having a movable plunger with a drywall compound flow path extending from an opposite end of the storage device to an outlet on the applicator head. A pressurized air arrangement is provided for pushing the plunger and delivering drywall compound through the drywall compound flow path. An actuating arrangement is slidably disposed upon the storage body and is engaged with a tape advancing mechanism, a tape severing device and a creaser wheel assembly for separately controlling tape advancement, tape severing and creaser wheel movement. In another version, the plunger is eliminated so that a substantially continuous flow of pressurized drywall compound is provided through an unobstructed delivery tube to the applicator head.

Abstract: An apparatus for dispensing liquified material includes a hollow storage body for holding a supply of liquified material within a flexible, collapsible bag located within the hollow storage body. A power supply head is connected to the bottom end of the hollow storage body. A liquified material supply head is connected to the top end of the storage body and has a liquified material passageway. An externally powered source is placed in communication with the power supply head to provide a compressive force on the bag holding the liquified material. The force is selectively applied to the bag so that liquified material is forced out of the bag in the hollow storage body through the liquified material passageway in the liquified material supply head.

Abstract: A drywall finishing head is provided for applying mastic material over a tape joint between adjacent wallboard surfaces. The finishing head includes a coater connected to a pneumatic applicator for delivering the mastic material. A wiper blade extends across the length of the coater with a cover underlying the wiper blade and a backer bar overlying the wiper blade. A cam assembly is rotatably mounted on a tensioning portion of the coater. Adjustment of the cam assembly is constructed and arranged to change the force of the backer boar so that a proper crown or profile of mastic material can be delivered to the tape joint through a gap between the cover and the wiper blade.