Motor driven by a pressurized fluid medium for operating an impa

Details Motor driven by a pressurized fluid medium for operating an impa Motor driven by a pressurized fluid medium for operating an impa

1974-05-17

1977-05-31

Schwadron, Martin P.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

Position responsive

83617, 91 5, 91 27, 91402, 92 85B, 92143, 188316, F15B 1522

Patent

active

040261921

ABSTRACT:
A motor driven by a pressurized fluid medium for operating an impact tool in a linear direction adapted for metal stamping and high velocity milling comprising a housing and a piston unit. The latter comprises a drive piston, a piston rod and a tool. In addition, the motor includes a kinetic energy absorbing device comprising a hydraulic fluid chamber and a retard piston which is rigidly connected to said piston unit and arranged to reciprocate in said fluid chamber. The retard piston retards the piston unit at the end of the strokes only and is freely passed by hydraulic fluid during the working stroke. Cup-shaped means are provided to restrict said by-pass flow of hydraulic fluid at the end of the strokes and thereby protect the motor from excessive stresses during no-load conditions.

REFERENCES:
patent: 625454 (1899-05-01), Maxim
patent: 675880 (1901-06-01), Carlisle
patent: 1062749 (1913-05-01), Townsend
patent: 1384216 (1921-07-01), Smith
patent: 2997025 (1961-08-01), Ottestad
patent: 3105414 (1963-10-01), Cvjetkovic
patent: 3303756 (1967-02-01), Geeson
patent: 3352143 (1967-11-01), Bollar
patent: 3363513 (1968-01-01), Ottestad
patent: 3431985 (1969-03-01), Bowen
patent: 3596562 (1971-08-01), Foster
patent: 3695378 (1972-10-01), Garrison
patent: 3739863 (1973-06-01), Wohlwend
patent: 3850078 (1974-11-01), Polizzi
patent: 3872776 (1975-03-01), Kongelbeck

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