Expansible chamber devices – With support or frame
Patent
1994-07-26
1995-12-05
Lopez, F. Daniel
Expansible chamber devices
With support or frame
92164, 92166, F01B 2900
Patent
active
054719097
ABSTRACT:
A fluid cylinder, particularly for steering a marine outboard motor, has a tubular body portion, and a piston rod and a piston movable relative to the body portion. First and second end plugs engage open end portions of the body portion and at least one end plug has an opening to receive the piston rod passing therethrough. First and second end caps enclose the first and second end plugs and open end portions of the body portion respectively, and retainers, e.g. bars, cooperate with the end caps to retain the end caps on the body portion. A seal is provided in a seal groove on an outer surface of the said one end plug, and a flat washer is located adjacent the outer face of the plug and has a clearance opening to receive the piston rod passing therethrough. An inner surface of the washer engages the seal and an outer surface of the end plug, and an outer surface of the washer is engaged by the first end cap. The end cap has an integral bracket extending laterally therefrom to avoid increasing length of the cylinder, and preferably is made by die-casting for strength and manufacturing simplicity. To avoid weeping of hydraulic fluid under pressure through the commonly porous die-cast material of the end cap, the seals, the end plug and body portion isolate the end cap from exposure to fluid under pressure.
REFERENCES:
patent: 165727 (1875-07-01), Gordon
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patent: 2744802 (1956-05-01), Strayer
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patent: 5002510 (1991-03-01), Rump
patent: 5092801 (1992-03-01), McBeth
patent: 5213527 (1993-05-01), Fetchko
Miller, Hydraulic cylinders, May 1954, 92/161.
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