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:
Feb. 05, 2002
Filed:
Oct. 14, 1997
Carl Robert Deckard, Austin, TX (US);
Other;
Abstract
This positive displacement device features relative rotation and translation of a piston and a cylinder where the rotation accomplishes a rotary valve function and the translation accomplishes a change in chamber volume function. The preferred embodiment is a ported, single-piston, four-stroke internal combustion engine with one moving part and low emissions, a sinusoidal cam on the cylinder is confined between two fixed cams relative to the generally fixed piston. The cam creates a four-stroke translational movement of the cylinder about the piston for each revolution of the cylinder. A transfer port on the cylinder facilitates movement of the intake charge from an intake port on the piston into the combustion chamber where it is compressed, ignited, and then removed by means of the transfer port and an exhaust port on the piston.