Piston assembly and method

Details Piston assembly and method Piston assembly and method

1991-01-09

1992-02-25

Look, Edward K.

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

Condition responsive means for modifying working member...

91519, 92108, F15B 1300

Patent

active

050902962

ABSTRACT:
A piston assembly employs a central velocity tube which provides an increase in speed of the initial downward stroke phase while requiring less power than conventional hydraulic cylinder assemblies. A second stage hydraulic surge causes the piston to forcefully descend the final increment of the downstroke for an increase in power of the piston. The return or upstroke of the piston is of conventional hydraulic design.

REFERENCES:
patent: 2284228 (1942-05-01), Page
patent: 3168853 (1965-02-01), Prince
patent: 3511133 (1970-05-01), Day
patent: 3996839 (1976-12-01), Norwood
patent: 4300584 (1981-11-01), Kosarzecki
patent: 4750408 (1988-06-01), Stoll
patent: 4976187 (1990-12-01), Yeazel

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