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:
May. 07, 1991
Filed:
Feb. 27, 1990
Brent R Cottingham, Ocean Springs, MS (US);
Other;
Abstract
An energy transfer unit comprises an upper wall, a lower wall spaced apart from the upper wall and being substantially parallel thereto, and at least three piston members pivotably mounted between the upper wall and the lower wall forming a chamber therebetween. Each piston member includes a piston face and a first edge. The pistons are disposed between the upper wall and the lower wall whereby the first edge of one piston member is slidably engaged with the face of an adjacent piston member. Preferably four piston members are provided thereby resulting in the compression chamber defining an alternatingly expanding or contracting cube.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile