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. 19, 1991
Filed:
Nov. 30, 1988
Roelf J Meijer, Ann Arbor, MI (US);
Robert P Verhey, Ann Arbor, MI (US);
Stirling Thermal Motors, Inc., Ann Arbor, MI (US);
Abstract
An actuating mechanism for controlling the swashplate angle in a Stirling cycle engine or other engine having parallel reciprocating pistons. The actuation system uses an electric motor for changing swashplate angle. Various embodiments for gear trains for communicating rotation of the electric motor rotor to the swashplate are described. In a first embodiment, a planet gear carrier is driven by the motor and the planet gears simultaneously mesh with two ring gears having a differing number of teeth. Rotation of the carrier creates a high reduction drive for the second ring gear. In accordance with a second embodiment, the ring gear carrier is permitted to freely rotate and a driving sun gear is provided which meshes with the planet gears. In accordance with a third embodiment, the planet gear carrier is driven and the planet gears have two different diameter scrtions which mesh with the two ring gears, thus avoiding the high friction associated with a mismatching of the teeth of the planet gear and ring gears of the first and second embodiments. The fourth embodiment combines the features of the second and third embodiment configurations.