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:
Apr. 21, 1981
Filed:
May. 07, 1979
Gerald Haft, Brookfield, WI (US);
Otto H Scharpf, Brookfield, WI (US);
Outboard Marine Corporation, Waukegan, IL (US);
Abstract
A powered device has a center of gravity and includes an engine comprising a block member, a crankshaft having opposite first and second end portions, and generally spaced supports on the block member for supporting the crankshaft for rotation with the first end portion extending toward the center of gravity and the second end portion extending beyond the supports. A piston is located in the block member for reciprocative movement, and a connecting rod has a first end portion pivotally connected with the piston and a rotationally balanced second end portion rotationally connected with the crankshaft intermediate the supports for converting the reciprocative movement of the piston into rotation of the crankshaft about its axis. The engine includes a counterweight on the crankshaft adjacent to the second end portion of the crankshaft for generating an offsetting foce during piston reciprocation to reduce vibration axially along the reciprocative axis of the piston and rotationally about an axis which extends through the center of gravity of the device.