Low leak pressure control actuator

Details Low leak pressure control actuator Low leak pressure control actuator

2005-03-15

2005-03-15

Michalsky, Gerald A. (Department: 3753)

Fluid handling

Systems

Supply and exhaust

C251S129140

Reexamination Certificate

active

06866063

ABSTRACT:
A low leak pressure control actuator for, e.g., controlling pressure in an automatic transmission system, includes a poppet and a check ball slidably disposed within a housing. The poppet and check ball are movable between a de-energized configuration, plural partially energized configurations, and a fully energized configuration. In the de-energized configuration, the poppet and check ball prohibit all flow to and from the supply port and permit flow between the control port and the exhaust port. In the partially energized configurations, the poppet and check ball permit flow to and from all of the ports, and incremental changes in the internal displacement of the poppet produce incremental changes in a control pressure. In the fully energized configuration flow, the poppet and check ball prohibit all flow to the exhaust port and permit fluid flow between the supply port and the control port.

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