Fluid regeneration circuit

Details Fluid regeneration circuit Fluid regeneration circuit

1992-05-15

1993-06-22

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

Inlet fluid supplemented by controlled fluid pressurized in...

91445, 91459, F15B 1104

Patent

active

052208621

ABSTRACT:
Fluid regeneration circuits are useful for filling expanding sides of a hydraulic motor with fluid being exhausted from the other side. The components of the currently available regeneration circuits are disposed in or adjacent to the directional control valve such that the fluid used for regeneration must pass through relatively long motor conduits between the control valve and the hydraulic cylinder. The regeneration circuit of the present invention includes a load check valve which forces the fluid exhausted from the head end chamber of a hydraulic motor to pass through a poppet valve controllably opened by a control signal. A low pressure relief valve causes an increase in the fluid pressure of the exhausted fluid passing through the poppet valve such that when the pressure level exceeds the pressure level of the fluid in an expanding side rod end chamber of the hydraulic motor, the exhausted fluid passes through a regeneration check valve and fills the expanding rod end chamber. The components of the regeneration circuit can be mounted directly to the hydraulic motor or in close proximity thereto minimizing the length of conduits through which the fluid must traverse as well as bypassing the directional control valve.

REFERENCES:
patent: 2367682 (1945-01-01), Kehle
patent: 3906840 (1975-09-01), Bianchetta et al.
patent: 3984979 (1976-10-01), Budzich
patent: 4194436 (1980-03-01), Imada
patent: 4610193 (1986-09-01), Barker et al.
patent: 5046309 (1991-09-01), Yoshino
patent: 5048395 (1991-09-01), Ohshima

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