Dispensing device for storing and applying at least one liquid or pasty substance
First Claim
1. A dispensing device for storing and applying at least one liquid or pasty substance, which device comprisesa housing;
- a dispensing nozzle attached thereto;
at least one cartridge adapted for being lodged in the interior of said housing and having cartridge wall means adapted for enclosing contents of at least one substance therein, and a discharge outlet;
said cartridge being longitudinally displaceable between a rearward and a forward end position in said housing;
a piston assembly comprising at least one piston for expelling a quantity of the aforesaid substance from said cartridge;
mounting means for said at least one cartridge in said housing;
at least one valve means for controlling dispensing of contents of said cartridge therefrom;
said valve means being associated with said cartridge and said housing in a manner such that said valve means are closed in said rearward end position, and said valve means are open in said forward end position of said cartridge;
means for displacing said cartridge and said piston assembly in a forward direction; and
restoring means for returning said cartridge from a forward position to said rearward end position thereof.
1 Assignment
0 Petitions
Accused Products
Abstract
A dispensing device comprises a cartridge unit with at least two chambers containing liquid or pasty substances and pistons therein being connected with each other by at least one blade adapted for cutting through a dividing wall, between two chambers and separating their contents, only one piston assembly being required which can be operated with a propellant under excess pressure preferably not exceeding 6 bars. As no piston rod is required the construction of the device is very compact. In a first step for actuating the pistons, the cartridge unit is moved forward toward an exit end of the device bearing a discharge nozzle whereby valves in the device are opened and contents from the cartridge unit are conveyed to the discharge nozzle. After each discharge a restoring element returns the cartridge unit to a rearward end position whereby the valves are closed and no contents can leak from the cartridge.
136 Citations
26 Claims
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1. A dispensing device for storing and applying at least one liquid or pasty substance, which device comprises
a housing; -
a dispensing nozzle attached thereto; at least one cartridge adapted for being lodged in the interior of said housing and having cartridge wall means adapted for enclosing contents of at least one substance therein, and a discharge outlet;
said cartridge being longitudinally displaceable between a rearward and a forward end position in said housing;a piston assembly comprising at least one piston for expelling a quantity of the aforesaid substance from said cartridge; mounting means for said at least one cartridge in said housing; at least one valve means for controlling dispensing of contents of said cartridge therefrom;
said valve means being associated with said cartridge and said housing in a manner such that said valve means are closed in said rearward end position, and said valve means are open in said forward end position of said cartridge;means for displacing said cartridge and said piston assembly in a forward direction; and restoring means for returning said cartridge from a forward position to said rearward end position thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A dispensing device for storing and applying at least one liquid or pasty substance, which device comprises
a housing; -
a dispensing nozzle attached thereto; at least one cartridge adapted for being lodged in the interior of said housing and having cartridge wall means adapted for enclosing contents of at least one substance therein, and a discharge outlet;
said cartridge wall means comprising at least one cuttable cartridge wall being manufactured at least partially from cuttable material;said at least one cartridge being longitudinally displaceable between a rearward and a forward end position in said housing; a piston assembly comprising at least two pistons by said cuttable cartridge wall and having frontal faces adapted for exerting pressure on said cartridge contents and extending up to a forward end plane; a piston-coupling unit adapted for connecting said at least two pistons with each other for joint displacement in said housing; at least one cutting member being mounted behind said forward end plane of said frontal faces of said two pistons and serving for cutting through said cuttable cartridge wall between said pistons; guiding means for said at least one cartridge in said housing; at least one valve means for controlling dispensing of contents of said cartridge therefrom;
said valve means being associated with said cartridge and said housing in a manner such that said valve means are closed in said rearward end position, and said valve means are open in said forward end position of said cartridge;means for displacing said at least one cartridge and said piston assembly in a forward direction; and a restoring means for returning said cartridge from said forward position to said rearward end position thereof; said piston assembly having slot means, associated with said pistons thereof, of a cross sectional area and configuration such that said cuttable cartridge wall can pass thereinto, and can pass therethrough after having been cut. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification