Brakes – Internal-resistance motion retarder – Including seal or guide
Patent
1982-10-26
1985-09-24
Halvosa, George E. A.
Brakes
Internal-resistance motion retarder
Including seal or guide
188315, 277152, F16F 936
Patent
active
045428115
ABSTRACT:
A shock absorber capable of effectively preventing a gas from leaking from a gas chamber, maintaining an oil seal in a firmly-held state, and preventing the reciprocating movements of a rod from adversely affecting the function of the oil seal, comprising an oil cylinder and a gas tube, which are joined together in a concentrically-arranged state to form a gas chamber therebetween; a rod, which is moved reciprocatingly in the oil cylinder; a bearing having an axially extending cylindrical support portion and fixed to an end portion of the oil cylinder to form an oil chamber in cooperation with the oil cylinder and rod support in such a manner that the rod can be slidingly moved; and an oil seal, which has a main lip sealingly slidable with respect to a circumferential surface of the rod, and a frustoconical check valve lip resiliently contacting an outer surface of the cylindrical support portion and adapted to allow an oil to flow from the oil chamber to the gas chamber and prevent the oil from flowing in the opposite direction, and the seal is held on the cylindrical support portion as a radially-extending portion, with which the main lip and check valve lip are connected integrally with each other.
REFERENCES:
patent: 3520384 (1970-07-01), Nicholls
patent: 3804217 (1974-04-01), Keijzer
patent: 4005769 (1977-02-01), Itoh
patent: 4108287 (1978-08-01), Kato
Gilday Michael P.
Halvosa George E. A.
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