Selective metered dose dispensing device
AssigneeNH Real Estate Holdings Ltd.
InventorsJohn-Philip Ventur, Billy Morrison, Andrea Bednarczyk, Marco DelBusso
Life of this patent
Estimating the term…
Abstract
An improved dispensing device for application and dispensing of viscous liquid substances comprising of a storage reservoir, dosing mechanism with audible and tactile feedback, dispensing plunger, nozzle tip, and end of travel pressure release mechanism. The dosing and the dispensing are de-coupled, allowing a preselection of dosage volume and controlled dispensing. A pressure relief mechanism is incorporated to eliminate oozing of liquids after the termination of dispensing.
Claims11
A dispenser for dispensing a metered amount of a viscous substance, comprising:
- a cylindrical reservoir for holding the substance, having an open downstream end and an open upstream end;
- a nozzle on the downstream end of the reservoir;
- a piston with a threaded stem located in the reservoir, the threaded stem extending beyond the open upstream end of the reservoir;
- a cylindrical dosing plunger for rotation about the threaded stem
- a stop-nut located in the reservoir and through which the stem passes with the piston located on the downstream side of the stop-nut and the cylindrical plunger located on the upstream side of the stop-nut;
- a spring located between the stop-nut and the cylindrical plunger,
- such that when the plunger is depressed, downstream movement of the threaded stem and in turn the piston is induced for dispensing the substance through the nozzle with the spring contacting the piston and the plunger, and release of pressure on the plunger causes the piston to recoil a distance upstream whereby dispensing of the substance is stopped.
A dispenser for dispensing a metered amount of a viscous substance, comprising:
- a cylindrical reservoir for holding the substance, having an open downstream end and an open upstream end;
- a frusto-conical piston on the downstream end of the reservoir;
- a piston with a stem located in the reservoir,
- a ratchet for advancing the stem in the reservoir,
- a spring,
- such that when the plunger is depressed, downstream movement of the stem and in turn the piston is induced for dispensing the substance from the device and release of pressure on the plunger causes the piston to recoil a distance upstream whereby dispensing of the substance is stopped.
Dependencies are inferred from the claim text.