The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2005
Filed:
Sep. 06, 2002
Miguel I. Avila, Chihuahua, MX;
Miguel I. Avila, Chihuahua, MX;
Delphi Technologies, Inc., Troy, MI (US);
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.