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US 4,236,651 AGranted
Dispenser device with valve piston pump
AssigneeTrisa Burstenfabrik AG
InventorsWalter Meyer, Anton J. Bara
Life of this patent
Estimating the term…
Abstract
A dispenser device comprising a reservoir for a flowable or fluent filled material as well as a piston pump equipped with a valve arrangement. The valve arrangement is coaxially dispositioned with regard to the pump and possesses parts connected with the piston and parts connected with the cylinder of the piston pump.
Claims24
A dispenser device for dosed dispensing of a fluent material, comprising:
- reservoir means for containing the fluent material;
- a piston pump having a cylinder part and a piston part which are movable relative to one another for selectively performing a suction stroke and a dispensing pumping stroke;
- a valve arrangement having an inlet valve and an outlet valve;
- said outlet valve being arranged in the piston part and said inlet valve being arranged in the cylinder part;
- each valve having a closure member, the two closure members being connected with one another by a valve stem for common actuation in the same direction;
- said two closure members together with the valve stem forming a valve body;
- each closure member coacting with a valve seat arranged at the cylinder part and the piston part, respectively;
- a first spring means, arranged between the closure member of the inlet valve and one end of the piston part, for bearing at one end against said closure member of the inlet valve and at the other end against said one end of the piston part;
- said first spring means, in the rest condition of the piston pump, maintaining said outlet valve closed and being compressed after closing of the inlet valve for keeping the inlet valve closed;
- said reservoir means having an outlet opening means for forming the valve seat of the inlet valve;
- said cylinder part of the piston pump being in fluid flow connection with the reservoir means and having a cylinder chamber communicating with said outlet opening means;
- said valve body being coupled with the piston part of the piston pump and being displaceable relative thereto against the pressure of said first spring means during said dispensing pumping stroke;
- and
- a second spring means acting between said piston part and said cylinder part for resiliently moving the piston part and the cylinder part relative to one another during the suction stroke.
11 more elements
A brush having a bristle carrier carrying a bristle set comprising:
- reservoir means for dispensingly housing the fluent material;
- a piston pump having a cylinder part and a piston part which are movable relative to one another for selectively performing a suction stroke and a dispensing pumping stroke;
- a valve arrangement having an inlet valve and an outlet valve;
- said outlet valve being arranged in the piston part and said inlet valve being arranged in the cylinder part;
- each valve having a closure member, the two closure members being connected with one another by a valve stem for common actuation in the same direction;
- said two closure members together with the valve stem forming a valve body;
- each closure member coacting with a valve seat arranged at the cylinder part and the piston part, respectively;
- a first spring means, arranged between the closure member of the inlet valve and one end of the piston part, for bearing at one end against said closure member of the inlet valve and at the other end against said one end of the piston part;
- said first spring means, in the rest condition of the piston pump, maintaining said outlet valve closed and being compressed after closing of the inlet valve for keeping the inlet valve closed;
- said reservoir means having an outlet opening means for forming the valve seat of the inlet valve;
- said cylinder part of the pump being in fluid flow connection with the reservoir means and having a cylinder chamber communicating with said outlet opening means;
- said valve body being coupled with the piston part of the piston pump and being displaceable relative thereto against the pressure of said first spring means during said dispensing pumping stroke;
- and
- a second spring means acting between said piston part and said cylinder part for resiliently moving the piston part and the cylinder part relative to one another during the suction stroke.
11 more elements
Dependencies are inferred from the claim text.