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:
Dec. 10, 2002
Filed:
Mar. 21, 2001
Robert Henry Sinclair, Pretoria, ZA;
Philip Loveday, Midrand, ZA;
David Ronald Jones, Basingstoke, GB;
Michael Yuri Shatalov, Pretoria, ZA;
Frederik A. Koch, Warmbaths, ZA;
Jeremy Wallis, Pretoria, ZA;
Johannes Nicolaas Bothma, Pretoria, ZA;
Jonathan Du Pre Le Roux, Centurion, ZA;
CSIR, Pretoria, ZA;
Abstract
A displacement generator ( ) has a housing ( ) defining a chamber ( ) containing an incompressible liquid ( ). A port ( ) of the housing ( ) is closed by a movable member ( ). Within the chamber ( ), opposing, convex, flexible walls ( ) form an internal modulating chamber ( ), which optionally contains a compressible gas. Opposed ends of the walls ( ) can be displaced toward and away from each other by a motion transducer, e.g. a stack of ceramic piezoelectric members ( ), respectively to pressurize and depressurize the chamber ( ) and thus to displace the member ( ) to and fro to form an output of the displacement generator.