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:
Feb. 20, 2007
Filed:
May. 05, 2005
Wendell L. Gilbert, Lebanon, TN (US);
Michael A. Macmillan, Nashville, TN (US);
Wendell L. Gilbert, Lebanon, TN (US);
Michael A. MacMillan, Nashville, TN (US);
TRW Automotive U.S. LLC, Livonia, MI (US);
Abstract
An improved valve assembly () includes a primary spring () which extends along a valve stem (). A spring retainer () holds the primary spring () on the valve stem () and has a thread convolution () which engages a thread convolution () on the valve stem (). The spring retainer () has a force transmitting surface () which engages a reference surface () on the valve stem () with a retainer preload force which is at least as great as a primary spring preload force. Shims () are provided between the primary spring () and the spring retainer () to enable a desired primary spring preload force to be obtained.