A control assembly for a material dispenser includes a plunger movably located within a bore of the assembly, the plunger having first and second ends, the first end having an abutment for moveably retaining the plunger within the bore and the second end for engaging a switch during operation of the material dispenser to cease operation. A biasing member located within the bore, the biasing member engaging the first end of the plunger, the biasing member allowing for the manual movement of the plunger without harm to the switch of the material dispenser during use.

Disclosed is a two liquid type cartridge syringe having an improved exhaust structure, and more particularly, a two liquid type cartridge syringe having an improved exhaust structure, in which an exhaust structure for discharging air remaining in a cartridge to the outside is improved, in order to ensure that the air remaining in the cartridge is completely exhausted in the process of assembling a piston with the cartridge, thereby preventing the remaining air from suppressing forward movement of the piston inside the cartridge.

The present invention provides actuation mechanisms that incorporate a transmission assembly that allows the mechanisms to cause actuation of workpieces according to a plurality of transmission modes (e.g., at least one forward transmission mode and at least one reverse transmission mode) on demand. Motion, direction, and/or force can be controlled by selecting the corresponding transmission mode. The mechanisms preferably are trigger-actuated by hand (i.e., manually) to cause movement of a workpiece in a desired direction. Desired directions can be linear or nonlinear. The same hand used for trigger action can also be used to change transmission modes in many modes of practice, even while using substantially the same grip used for trigger actuation. In other instances, actuation can be automated rather than manual. Preferably, both actuation and witching among transmission modes can be accomplished with one hand, even while maintaining substantially the same grip that is used for actuation.

A trigger assembly can be used to activate a motor controller to cause a motorized device to respond in a certain manner. For example, when the motorized device is a power tool, based on a number of pulls of the trigger, the motor controller can run the power tool in a forward direction or a reverse direction. A power tool running in the forward direction can receive a tap of the trigger. A timer can be started upon detecting the pull of the trigger. Another tap of the trigger can be detected within a time period determined based on the timer. The power tool can be forced to perform a reverse operation when the other tap f the trigger is within the time period.

A method, computer program product, and apparatus for receiving, at a fluid dispensing apparatus, a control signal, wherein the control signal may be received from a base station, wherein the control signal, when received, may cause the fluid dispensing apparatus to perform operations. The operations may include generating a positive pressure within a fluid cartridge of the fluid dispensing apparatus by adjusting, via a motor of the fluid dispensing apparatus, a drive rod and piston of the fluid dispensing apparatus in a first direction relative to the fluid cartridge to dispense fluid in the fluid cartridge via a nozzle of the fluid dispensing apparatus. The operations may include generating a negative pressure within the fluid cartridge by adjusting, via the motor, the drive rod and piston in a second direction relative to the fluid cartridge to draw fluid into the fluid cartridge via the nozzle.

An applicator for ejecting doses of a flowable component includes a housing, an application tip connected to the housing, an actuation mechanism, and an insert which is detachable from the housing. The insert is adapted to be inserted into the housing, and has a storage volume for the flowable component. The housing includes a receiving portion adapted to the insert. The insert includes a drive portion which is adapted to cooperate with the actuation mechanism so that the operation of the actuation mechanism results in a displacement of the insert relative to the housing and on a displacement axis.

Spackling or caulking devices using cartridges for applying spackling or caulking to one or more surfaces or objects and methods of using the same.

A dispenser for a fluid material includes a handle portion and a cartridge having the material to be dispensed. The cartridge is easily mounted to the handle portion or removed, whereby the handle portion may be used with a variety of cartridges, each of which may contain a selected material. The handle portion includes a plunger that is moved linearly by actuation of a trigger mechanism, which is engaged by a user's finger. The trigger mechanism is configured to release pressure applied to the plunger quickly upon release of pressure on the trigger and to allow the plunger to move away from the cartridge to ensure release of pressure in the material to be dispensed to prevent dripping.

Embodiments included herein are directed towards an apparatus that may be used to dispense a fluid. The apparatus may include a housing, wherein the housing includes a first end and a motor, wherein the first end is configured to be coupled to a syringe. The motor may be configured to be operatively connected to a drive tube, wherein at least a portion of the drive tube is configured to extend from and retract into an opening in the first end of the housing in response to the motor. One or more of the motor and the drive tube may be rotationally fixed to the housing. A first end of the drive tube may be configured to be coupled to a piston of the syringe.

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.