Abstract: A pneumatic dispensing gun includes a receptacle having a conduit for receiving a pressurized gas, a cartridge supported on the receptacle, an end cap attached to the cartridge and having a path communicating with the conduit of the receptacle, and a regulating device attached to the end cap for regulating the pressurized gas or for allowing pressurized gas supplied to the dispensing gun to be released when required, and for preventing the pressurized gas supplied to the dispensing gun from being over pressurized, and thus for suitably and adjustably dispensing the flowable material from the cartridge.

Abstract: A caulk dispensing gun for dispensing a viscous material received in a cartridge, includes a stock having a piston rod, an actuating plate having an aperture for receiving the piston rod, and a trigger pivotally secured to the stock and having an actuating pin for engaging with the actuating plate. The actuating plate may move the piston rod incrementally and forwardly relative to the stock to force the viscous material out of the cartridge. An adjusting device may adjust the inclination of the actuating plate relative to the piston rod, to adjust a frictional engagement between the actuating plate and the piston rod, particularly after the piston rod and the actuating plate have been worn out after use.

Abstract: A dispensing gun includes a stock having a frame for holding a cartridge, a rod slidably engaged through the stock and having a plunger for moving a viscous material out of the cartridge. A trigger and an actuating plate may move the rod incrementally and forwardly and rearwardly relative to the stock. A release plate is engaged on the rod for limiting the rearward movement of the rod relative to the stock. A spring member is engaged with the release plate for moving the rod forwardly and/or for moving the release plate away from an abutment of the stock.