Hydraulic flow control system and method

Details Hydraulic flow control system and method Hydraulic flow control system and method

2011-03-29

2011-03-29

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control of motive fluid flow

C091S436000

Reexamination Certificate

active

07913491

ABSTRACT:
Apparatus and methods are provided for controlling a double-acting hydraulic cylinder during a load-induced rod-extending operation. The apparatus includes a activation circuit and valve for providing a flow path from a pump to the cylinder head end; a flow regeneration circuit and valve fluidly connecting the cylinder rod end and the cylinder head end and configured for providing flow from the rod end to the head end during rod extension; and a controller responsive to rod-extending rate demands and rod-position sensor signals, and operatively connected to the regeneration flow valve and the activation valve. The activation valve also includes a return valve part to control flow from the rod end to the fluid reservoir during rod extension. Both the activation valve and the return valve part are controllable by the controller independently from the regeneration flow valve.

REFERENCES:
patent: 3267966 (1966-08-01), Williams
patent: 3434392 (1969-03-01), Landers
patent: 3824896 (1974-07-01), Tull, III
patent: 4194436 (1980-03-01), Imada
patent: 4955282 (1990-09-01), Ranson
patent: 5370038 (1994-12-01), Poppe et al.
patent: 5415076 (1995-05-01), Krone et al.
patent: 5669282 (1997-09-01), Tanino et al.
patent: 5791226 (1998-08-01), Chung et al.
patent: 5862831 (1999-01-01), Chung et al.
patent: 5996465 (1999-12-01), Morikawa et al.
patent: 6173639 (2001-01-01), A'Hearn et al.
patent: 6267041 (2001-07-01), Skiba et al.
patent: 6955115 (2005-10-01), A'Hearn et al.
patent: 2007/0151442 (2007-07-01), Kraft
patent: 2008/0072749 (2008-03-01), Pfaff et al.

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