Expansible chamber devices – With cushioning means effective over a portion only of stroke
Patent
1979-03-26
1981-03-31
Cohen, Irwin C.
Expansible chamber devices
With cushioning means effective over a portion only of stroke
92135, 92194, 92240, F01B 1102, F16J 908
Patent
active
042586143
ABSTRACT:
A cylinder device has a main body having therein a cylinder having an inner closed end and an outer open end, a piston slidably fitted in the cylinder and having a small diameter portion on the inner end thereof, a liquid pressure chamber defined between the piston and the inner end of the cylinder, a cup seal fitted around the small diameter portion of the piston with a lip portion thereof directed toward the liquid pressure chamber and sealingly engaged with the cylinder, an annular retainer disposed in the liquid pressure chamber, a spring acting between the piston and the annular retainer to urge the retainer against the inner end of the cylinder, the configuration of the annular retainer being such that when the piston is at the innermost position in the cylinder the annular retainer engages the lip portion of the cup seal to prevent the lip portion from radially inward deflection.
REFERENCES:
patent: 1200001 (1916-10-01), McClelland
patent: 1431355 (1922-10-01), Andrews
patent: 1602536 (1926-10-01), McElroy
patent: 2059729 (1936-11-01), Dick
patent: 2424225 (1947-07-01), Dick
patent: 2571538 (1951-10-01), Christensen
patent: 2637976 (1953-05-01), Myers et al.
patent: 2865695 (1958-12-01), Mazeika
Cohen Irwin C.
Tokico Ltd.
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