Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Reexamination Certificate
2005-12-20
2005-12-20
Lazo, Thomas E. (Department: 3745)
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
C060S445000
Reexamination Certificate
active
06976357
ABSTRACT:
A plurality of hydraulic actuators are connected by valve assemblies to fluid supply and return conduits. Desired operating velocities are specified for the hydraulic actuators and used to define the amounts of fluid flow required by each actuator to move at the respective velocity. Provide the requisite flow amounts, fluid at related pressures must be provided at the different hydraulic actuators. In order for those pressures to occur, a pump has to furnish fluid at a greater pressure to allow for supply conduit losses. A process is provided for determining the pressure that the pump must provide to satisfy the greatest pressure that is necessary for the desired operation of all the hydraulic actuators.
REFERENCES:
patent: 6173573 (2001-01-01), Kamada
patent: 6328275 (2001-12-01), Yang et al.
patent: 6715402 (2004-04-01), Pfaff et al.
patent: 6718759 (2004-04-01), Tabor
patent: 6775974 (2004-08-01), Tabor
Haas George E.
HUSCO International Inc.
Lazo Thomas E.
Quarles & Brady LLP
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