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. 06, 2014
Filed:
Oct. 20, 2011
Venkatesh Gopalakrishnan, Troy, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Russell P. Durrett, Bloomfield Hills, MI (US);
Venkatesh Gopalakrishnan, Troy, MI (US);
Paul M. Najt, Bloomfield Hills, MI (US);
Russell P. Durrett, Bloomfield Hills, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A free piston linear alternator includes a cylinder having a pair of outer chambers, a pair of opposed pistons and a combustion chamber disposed between the opposed pistons. Each outer chamber is disposed between respective ones of the pistons and a respective outer end of the cylinder. The pistons are axially opposed from each other and independently generate electric current when each of the pistons linearly translate. Each of a pair of return members is disposed within a respective one of the outer chambers, and each of the return members is configured to return respective ones of the pistons to a respective first position from a respective second position after combustion.