Expansible chamber devices – With force exerting means to move fluid from non-working...
Patent
1982-09-29
1984-08-07
Garrett, Robert E.
Expansible chamber devices
With force exerting means to move fluid from non-working...
92 82, 92 86, 92168, F15B 2104
Patent
active
044636636
ABSTRACT:
A compressible bellows surrounds a piston rod of the hydraulic cylinder of a hydraulic elevator. The lower end of the bellows surrounds a liquid receiving recess in the gland box of the cylinder and, when a sealing ring on the piston rod closes and compresses the bellows, the leaked hydraulic fluid is discharged from the recess, via a ball check valve, and a return tube to a sump.
REFERENCES:
patent: 1787700 (1931-01-01), Persons
patent: 3369411 (1968-02-01), Hines
patent: 4017214 (1977-04-01), Smith
patent: 4154434 (1979-05-01), Wallis
Hanson Russell B.
Hanson, Jr. Wallace A.
Garrett Robert E.
Moritz Scott L.
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