Torque limiting device for hydraulic piston pump

Details Torque limiting device for hydraulic piston pump Torque limiting device for hydraulic piston pump

2006-10-03

2006-10-03

Kershteyn, Igor (Department: 3745)

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Cylinders parallel to rotation axis

C092S012200, C092S131000, C417S222100

Reexamination Certificate

active

07114432

ABSTRACT:
A torque control for a hydrostatic piston pump that provides for a servo piston rod that is connected to the swashplate of the pump and connected to a servo piston within a first cavity that receives compensation pressure that urges the servo piston toward the swashplate. The servo piston has a stem that extends into a bore and is in contact with the stem of a maximum displacement piston that extends into a second cavity that is acted upon by system pressure to urge the maximum displacement piston toward the swashplate. Additionally, within the second cavity is a set of Bellville washers that surround the stem of the maximum displacement piston to limit the movement of the maximum displacement piston toward the swashplate.

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