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. 03, 1992
Filed:
Mar. 05, 1990
David A Zornes, Redmond, WA (US);
Jan W Van Wyk, Kirkland, WA (US);
Balanced Engines, Inc., Tacoma, WA (US);
Abstract
A Scotch yoke mechanism has a yoke frame with opposed parallel tracks engaged by rollers presented by a block assembly and is arranged to transmit power between a rotating crankshaft on a crankpin of which the block assembly is mounted and oppositely directed pistons mounted on the yoke frame, which moves linearly along a reciprocation axis. Two additional Scotch yoke mechanisms of the same type are presented by a cage surrounding the yoke frame and presenting two additional pistons opposing those of the first-mentioned Scotch yoke mechanism. The cage operates from two spaced apart crankpins which are aligned, and also moves linearly along the reciprocation axis.