Abstract: A material dispenser for receiving a material container and for dispensing material from the container is disclosed. The material dispenser includes a frame having a body, depending handle and rails that extend forward from the body. The material dispenser also includes a trigger actuated plunger mechanism that is operative to push a piston in the material container to dispense material from the container. The material container is held in the material dispenser by a rear receptacle and a distal receptacle. The rear receptacle is coupled to the rails and may be pivoted between a position that is facing the distal receptacle and a position that is oblique to the distal receptacle. The distal receptacle is also coupled to the rails and includes an opening that is located between the rails, and a clip that can engage and retain the material container.

Abstract: A material dispenser for receiving a material container and for dispensing material from the container is disclosed. The material dispenser includes a frame having a body, depending handle and rails that extend forward from the body. The material dispenser also includes a trigger actuated plunger mechanism that is operative to push a piston in the material container to dispense material from the container. The material container is held in the material dispenser by a rear receptacle and a distal receptacle. The rear receptacle is coupled to the rails and may be pivoted between a position that is facing the distal receptacle and a position that is oblique to the distal receptacle. The distal receptacle is also coupled to the rails and includes an opening that is located between the rails, and a clip that can engage and retain the material container.

Abstract: A caulk gun having a piston with a flexible rim providing dripless dispensing of caulk or adhesive and including a tube-engaging receptacle for securely holding a tube is disclosed. The advantages of a dripless caulk gun are provided by a piston having a flexible circumferential rim that engages an inside surface of a caulk or adhesive dispensing tube to create an atmospheric seal. The plunger moves the piston against an inside movable surface of the dispensing tube. When the trigger is released, the plunger mechanism moves backward, and the piston creates a partial vacuum within the caulk tube thereby halting dispensing. The dispensing tube is attached to the caulk gun by secure engagement with a tube-engaging receptacle. The receptacle may be provided with threads that threadingly engage with a portion of the dispensing tube.

Abstract: A dripless caulk gun is disclosed having a biased-spring drive mechanism and a plunger that presses against an inside surface of a caulk tube for dispensing caulk. At the end of the plunger is a piston having a flexible rim which creates a seal between the piston and an inside surface of the caulk tube, thus creating a partial vacuum in a volume between the piston and the inside end face of the caulk tube when the plunger is moved backward. The partial vacuum causes a drive plate within the caulk tube to move back into the partial vacuum, thereby relieving all built-up pressure within the caulk-filled portion of the caulk tube which immediately ends dispensing of caulk.

Abstract: A dripless caulk gun is disclosed having a biased-spring drive mechanism and a plunger that presses against an inside surface of a caulk tube for dispensing caulk. At the end of the plunger is a piston having a flexible rim which creates a seal between the piston and an inside surface of the caulk tube, thus creating a partial vacuum in a volume between the piston and the inside end face of the caulk tube when the plunger is moved backward. The partial vacuum causes a drive plate within the caulk tube to move back into the partial vacuum, thereby relieving all built-up pressure within the caulk-filled portion of the caulk tube which immediately ends dispensing of caulk.