초록 ▼

A pump chamber dispenser for toothpaste or other viscous or pasty product comprises a pump member (54) moulded form elastomeric material and having a domed central portion (56) and a bifurcated peripheral portion providing inner and outer skirts arranged to lie against respective surfaces of a proje

A pump chamber dispenser for toothpaste or other viscous or pasty product comprises a pump member (54) moulded form elastomeric material and having a domed central portion (56) and a bifurcated peripheral portion providing inner and outer skirts arranged to lie against respective surfaces of a projection (36) formed on the end wall (18) of the dispenser body (10), and to serve as inlet and exit valves controlling an inlet port (20) communicating the pump chamber (21) with the reservoir chamber (22), and an exit port communicating the pump chamber with a discharge nozzle (58). The nozzle is integral with a cover fixed to the body (10) and enclosing the pump member, the cover including a button (70) for acting on the pump member to operate the dispenser.

대표청구항 ▼

A pump chamber dispenser for viscous or pasty product, comprising a body including a tubular side wall and an end wall panel integral with the side wall, a closed reservoir chamber within the body for receiving viscous or pasty product to be dispensed, the chamber being defined partly by said end wa

A pump chamber dispenser for viscous or pasty product, comprising a body including a tubular side wall and an end wall panel integral with the side wall, a closed reservoir chamber within the body for receiving viscous or pasty product to be dispensed, the chamber being defined partly by said end wall panel, a piston within the chamber to move the viscous or pasty product toward said end wall panel, a unitary pumping member of elastomeric material mounted on the end wall panel outside of the reservoir chamber and confining with the end wall panel a variable volume pump chamber, the pumping member including integral inlet and exit valve elements, an inlet port for conducting product to the pumping chamber from the reservoir chamber and an exit port for conducting product from the pumping chamber to a discharge nozzle, the inlet and exit ports being controlled by the inlet and exit valve elements, respectively, said end wall panel having a substantially annular projection directed away from the reservoir chamber and extending around an axis substantially parallel to the longitudinal axis of the body, the projection having inner and outer substantially cylindrical surfaces and a portion of said end wall panel surrounds said projection with the portion of said end wall panel being substantially planar, and said pumping member being rotationally symmetrical about an axis substantially parallel to the longitudinal axis of the body and having a domed portion and inner and outer coaxial skirts extending from the edge of the domed portion and forming said inlet and exit valve elements, respectively, said skirts lying against said radially inner and outer surfaces of said projection with said outer skirt extending from the domed portion toward but terminating before the substantially planar portion of said end wall panel, said inlet port extending through the end wall panel from said groove to said radially inner surface of the projection, and said inlet port being closable by the inner skirt, a recess provided in said end wall panel and extending across the projection to define said exit port, the exit port communicating with the pumping chamber and opening at the said radially outer surface of the projection at a position to be closable by the outer skirt, and a cover member fixed to the body by a snap connection and including said discharge nozzle, the cover member having a movable part for acting on the domed portion of the pumping member to reduce the volume of the pumping chamber, and being arranged to enclose the pumping member during operation of the pump dispenser.