A cartridge fitting portion of a cylindrical syringe made of a resin includes an end surface opening portion, a continuous opening portion continuous with the end surface opening portion, opened in a radial direction, and extending in an extending direction, and a recess portion configured to communicate with the end surface opening portion, the continuous opening portion, and an internal passage in a cylindrical body. The recess portion includes a flange fitting recess to be fitted with a flange portion of a cartridge, and a cylindrical portion fitting recess that communicates with the flange fitting recess and is fitted with a part of the cylindrical portion. A wall portion surrounding the cylindrical portion fitting recess of the cartridge fitting portion is configured to warp into snap engagement with the part of the cylindrical portion when the part of the cylindrical portion is inserted from the continuous opening portion.

A dispenser including a sub-assembly to engage and disengage a plunger rod. The sub-assembly minimizes the need for springs and other biasing members within the dispenser.

A dispenser for dispensing a mixing of viscous materials is provided, to dispense a two or more component material such as a two or more component sealant or adhesive. The dispenser comprises a dispensing mechanism for dispensing respective materials from a material holder through a dynamic mixer. The dispensing mechanism is driven by a first electric motor and the dynamic mixer is driven by a second electric motor. Advantageously, a simple and effective multicomponent dispenser with a dynamic mixer is provided.

A grease gun which uses a piston to mechanically push grease from a standard tube without the need for air pressure. A grease tube chamber is sized to hold a standard tube of grease, and may be closed at a first or front end by a cap with a dispensing nozzle. At a second end, a piston assembly includes a plunger rod with a piston that may be advanced towards the front end by a drive handle assembly. As the piston advances, it enters into the open rear end of a grease tube, pushing the grease forward where it is dispensed through the nozzle on the cap. When not in use, the plunger rod is urged rearwards by a spring, pulling the piston away from the grease to reduce potential leakage.

A grease gun cylinder walled cartridge adapted for direct attachment to any of a variety of grease gun head constructions and grease pumping systems, wherein the cartridge wall can be of any color or completely clear and see through, wherein the grease column within the cartridge is pressured toward and through an inlet port in the gun head, which port opens on the section stroke of a piston mounted in said cylinder into a loading portion of a cylinder of the grease pumping system, and wherein the grease column pressuring means is ambient air pressure.

A dispensing gun with an onboard tool stowage system is provided and has a frame body that includes a handle housing and a cartridge frame portion extending from said handle housing. The cartridge frame portion is configured for receiving a cartridge of work material therein. The frame body further includes at least one retention structure that has at least one receiving post protruding from said frame body. The dispensing gun further includes at least one accessory tool configured for detachable coupling with said at least one receiving post when stowed thereon, and a drive mechanism that is operably coupled to said frame body. The drive mechanism includes a drive member which passes displaceably into the cartridge frame portion responsive to operation of a trigger operatively disposed in the handle housing.

A caulking gun includes a main body, a pushing rod, a pushing element, a bar-linkage assembly, and a trigger. The main body is formed with a handle extending downward. The pushing element and the bar-linkage assembly are arranged in the main body. The pushing rod is inserted through the main body and the pushing element. The bar-linkage assembly includes two bars aligned horizontally but not parallel to each other. One of the bars abuts against the pushing element. The trigger is pivotally disposed on the main body, and one end of the trigger abuts against a roller between the two bars. When the trigger is pulled, the roller is pushed upward by the trigger to push the pushing element forward via the bar-linkage assembly so that the pushing element inclines to bring the pushing rod move forward.

A grease gun cylinder walled cartridge adapted for direct attachment to any of a variety of grease gun head constructions and grease pumping systems, wherein the cartridge wall can be of any color or completely clear and see through, wherein the grease column within the cartridge is pressured toward and through an inlet port in the gun head, which port opens on the section stroke of a piston mounted in said cylinder into a loading portion of a cylinder of the grease pumping system, and wherein the grease column pressuring means is ambient air pressure.

A caulking gun includes a housing having a channel opened upwardly, a supporting bracket engageable into the channel of the housing and having an opening for detachably attaching a cartridge member, and a latch device having a latch member slidably attached to the housing and movable relative to the housing for selectively engaging with the supporting bracket and for preventing the supporting bracket and the cartridge member from being disengaged from the housing. The latch member includes two anchors engageable into the channel of the housing for engaging with the supporting bracket and for preventing the supporting bracket and the cartridge member from being disengaged from the housing.

A hand held craft gun including a housing assembly and a receptacle defined therein. A housing handle and shaft are disposed on the housing adjacent either side of the receptacle with the shaft extending away from the housing handle. A plunger handle supporting a plunger rod is disposed on the shaft and a simple yet unique coupling is employed for pivoting the plunger rod between a position unaligned with the receptacle for fun and quick filling and refilling of a modeling compound and a position aligned with the receptacle for easy extruding of the modeling compound. Additionally, at least one storage cavity at the housing handle and/or plunger handle partially contains the plunger rod in a folded position for quick and easy transport of the craft gun.