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. 13, 2012
Filed:
Mar. 22, 2010
Applicants:
Robert O. Burkhart, Novi, MI (US);
Gregory M. Pietron, Canton, MI (US);
Yuji Fujii, Ann Arbor, MI (US);
Inventors:
Robert O. Burkhart, Novi, MI (US);
Gregory M. Pietron, Canton, MI (US);
Yuji Fujii, Ann Arbor, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
F15B 13/044 (2006.01); H02N 2/06 (2006.01); F16K 31/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A valve-actuator includes a chamber, a spool that opens and closes connections between ports in the chamber, an actuator including a housing containing a piezoelectric stack having a bore, and a spring contacting the spool through the bore and forcing the stack toward the chamber, the stack expanding and contracting in response to a voltage, the spool moving in the chamber in response to said expansion and contraction.