Balance free-piston hydraulic pump

Details Balance free-piston hydraulic pump Balance free-piston hydraulic pump

1982-03-02

1984-10-16

Ostrager, Allen M.

Power plants

Pressure fluid source and motor

Having plural energy input means, pumps or diverse pump outlets

60484, 60520, 417338, 417383, F02G 104

Patent

active

044766815

ABSTRACT:
A four piston hydraulic pump driven by a four cylinder free-piston Stirling engine has four stepped pistons operating out of phase in pairs. The hydraulic fluid pumped between the hydraulic cylinder can be tapped for hydraulic power. The stepped pistons give the option of utilizing low flow/high pressure, or high flow/low pressure. The non-utilized flow ensures that the timing between pistons will always remain correct. Since the arrangement is symmetrical, it remains balanced.

REFERENCES:
patent: 3100965 (1963-08-01), Blackburn
patent: 3811283 (1974-05-01), Hartmann et al.

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