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:
Aug. 01, 1989
Filed:
Mar. 10, 1988
Applicant:
Inventors:
Stanley Abkowitz, Lexington, MA (US);
Harold L Heussi, Essex, MA (US);
Harold P Ludwig, Woburn, MA (US);
Stephen A Kraus, Clinton, MA (US);
Assignee:
Dynamet Technology Inc., Burlington, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
1231 / ; 123 9051 ; 251368 ; 291567 ;
Abstract
A poppet valve having a valve stem of titanium alloy strengthened by the inclusion of a compound containing titanium such as TiC, TiB or TiB.sub.2. The valve stem is joined to a valve head formed from a powder of a titanium alloy, preferably of the same composition as the alloy of the stem. The head and the stem are joined by cold compaction followed by vacuum sintering and a high temperature compaction.