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:
Mar. 27, 2001
Filed:
Feb. 22, 1999
Brett M. Bailey, Peoria, IL (US);
Willibald G. Berlinger, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A free piston internal combustion engine includes a housing with a combustion cylinder and a second cylinder. A piston includes a piston head reciprocally disposed within the combustion cylinder, a second head reciprocally disposed within the second cylinder, and a plunger rod rigidly attached to each of and interconnecting the piston head and the second head. The piston head defines a bearing with the inside surface of the combustion cylinder. A single bearing is carried by the housing within the second cylinder and reciprocally carries the plunger rod. The single bearing is the only bearing which directly carries the plunger rod.