The present invention provides a plunger (20) for a dispenser, the plunger including a large diameter body portion (23) provided with ring-shaped contact surfaces (24, 25) that contact an inner wall surface of a syringe, a rear opening (26) formed in a backside of the large diameter body portion (23), and a small diameter body portion (22) provided with a front opening (28), wherein the front opening (28) is formed in a size allowing a liquid material to be directly pressed by pressurized air, and allowing at least the plunger (20) to move following a fall in water head position, which is caused with discharge and consumption of the liquid material. With those features, the liquid material can be prevented from adhering to the inner wall surface of the syringe, and the liquid material in the syringe can be prevented from flowing backwards.

A resiliently deformable member for use in an apparatus for dispensing a viscous material from a container, such as an apparatus consisting of a container for holding the viscous material and a dispensing gun. The resiliently deformable member has a relaxed state and a compressed state. In use, the resiliently deformable member applies a force between the container and the dispensing gun to modulate the flow of the material from the container.

A reusable cartridge piston for use with film bag cartridges comprises a piston base, an intermediate portion and a piston head. An extension axis extends from the piston base through the intermediate portion and through the piston head. The piston also includes a lip sections extending radially outwardly with respect to the extension axis from a sidewall of the piston head, the piston base and the piston head being spaced apart from one another by the intermediate portion, with a gap between the piston base and the lip sections. The lip sections are respectively spaced apart from one another by slits formed between two neighboring lip sections, with the slits extending in a radial direction with respect to the extension axis of the piston. The piston base, the intermediate portion, the piston head and the lip sections are formed as one piece.

An apparatus for applying viscous material to workpieces has at least two material outlets. A needle valve is assigned to each material outlet, the valve needle of which being able to close the respective material outlet on a valve seat. Each valve needle is assigned a cylinder, in the piston chamber of which a piston is movable by pressure applied by a fluid, and which cylinder has a piston rod for impingement on the respective valve needle, the piston rod being connected to the piston, being guided out of the piston chamber on an end face facing the valve seats and extending longitudinally. The cylinders are arranged one behind the other longitudinally and the piston rod of at least one of the cylinders is guided in a sealed manner through the piston chamber of at least one further cylinder arranged closer on the valve seats.

Caulking systems and caulking system accessories are described herein.

This invention is a gun shaped device used in the application of caulk, paste and or other semi solid high viscosity fluids. The device contains a barrel portion for the tube to be inserted into, and a plunger portion with a flat round metal piece with a fitting that attaches to a set of shortened rods. The set of shortened rods acts as a plunger and goes through a guide toward the back of the handle. The barrel can be shortened for use of smaller tubes of caulk.

An object is to suppress a variation in amount of a sealant that is applied on an object to be sealed. There is provided a sealant discharge nozzle configured such that a sealant from a cartridge is discharged from a discharge hole of the sealant discharge nozzle. The sealant discharge nozzle has a leading end portion comprising a pair of side wall portions; and a connecting wall portion configured to connect the pair of side wall portions with each other and provided in cooperation with the pair of side wall portions to form a first recess that is open on one side in a first direction perpendicular to an axial direction of the sealant discharge nozzle, and on a leading end side. The discharge hole has an opening formed on a first recess side of the connecting wall portion.

A control method of an electromechanical apparatus (10) for installing a plunger tip (31) in a syringe (21), the control method comprising: providing a syringe (21) with at least one opening (22); providing a plunger tip (31) configured for snug insertion in the opening (22); pushing the plunger tip (31) inside the syringe (21), by a pusher rod (60) of the electromechanical apparatus (10), the plunger tip (31) passing through an intermediate cannula element (50); monitoring over time a force exchanged between the plunger tip (31) and the pusher rod (60), providing a force signal (401, 402, 403, 404) by a force detector (61) of the electromechanical apparatus (10); analyzing the force signal (401, 402, 403, 404) to determine an installation status of the plunger tip (31) in the syringe (21).

A reversible and reusable caulk dispenser for use with a caulk gun. The caulk dispenser has a tubular cartridge with a plunger inside the cartridge near a first open end of the cartridge and an end cap with a nozzle that can be attached at an open second end of the cartridge. A foil packet of caulk or sealant material is inserted in the cartridge of the dispenser. A closed end of the packet is positioned adjacent the plunger while an open end of the packet is at the end of the cartridge where the end cap is attached. The dispenser is used in a standard caulk gun and the caulk material expelled through the nozzle as the caulk gun is operated. When the packet is emptied the dispenser can be reused with a new packet inserted and the end cap attached now to the opposite end of the cartridge.

A hand-held lubrication device that allows for both one- and two-handed operation. The device utilizes a front-facing mounted trigger that actuates a rear-mounted plunger via two tie rods.