Pumps – Expansible chamber type – Valved piston
Patent
1998-08-25
2000-09-12
Walberg, Teresa
Pumps
Expansible chamber type
Valved piston
F04B 5312
Patent
active
061168734
ABSTRACT:
A floor pump consists of a pump seat, a pumping rod, a pivoting member, an air nozzle, and an air guiding hose. The pump seat is composed of a cylinder and a base. The cylinder is provided in the bottom end thereof with a cross through hole in communication with a chamber of the cylinder. The pumping rod is composed of a handle and a rod body which is inserted into the chamber of the pump seat and is connected at the bottom end thereof with a valve plug for forcing air into the cross through hole. The pivoting member is provided with a shaft tube which is received in the cross through hole and is connected at one end thereof with a tube head in such a manner that other end of the shaft tube is jutted out of the cross through hole, and that the other end of the shaft tube is connected with a locating member. The shaft tube is provided in the periphery thereof with two leakproof rings for preventing the leak of air that has entered the cross through hole. Located between the leakproof rings is an air admitting hole via which air is admitted to the shaft tube. The air is then allowed to flow into the tube head via an air duct. The tube head is provided therein with a check valve to avert the reverse flow of air. The air nozzle has a head which is provided with an injector and is engageable with the inflation valve of an inflatable object. The air guiding hose is connected with the tube head of the pivoting member and the head of the air nozzle and is intended to guide the air to flow from the air duct of the pivoting member to the air nozzle.
REFERENCES:
patent: 3907461 (1975-09-01), Bouder
patent: 4120614 (1978-10-01), Bouder
patent: 5127804 (1992-07-01), Chappell
Patel Vinod D.
Walberg Teresa
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