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:
Apr. 16, 2002
Filed:
Mar. 10, 2000
Chris Hills, Layton, UT (US);
EDO Electro-Ceramic Products, Salt Lake City, UT (US);
Abstract
A piezoelectric motor has a head to movably engage a separate member, and one or more piezoelectric blocks coupled to the head, and displacing the head and separate member by selectively expand and contract in response to an applied electric field. An electrode extends between the head and the piezoelectric block. One or more apertures are formed in the electrode to create a space between the head and the at least one piezoelectric block to receive an adhesive to join the head and the piezoelectric block. A joint is formed between the piezoelectric block and head which has a first rigid zone to displace as the piezoelectric block expands, and a second compliant zone to comply. The electrode extends only through a portion of the joint, or the rigid zone, and the adhesive extends through at least another portion of the joint, or the compliant zone. A pre-load mechanism applies a force to the piezoelectric block and head in a linear direction oriented perpendicular to the separate member to force the head against the separate member.