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. 09, 1982
Filed:
Nov. 14, 1979
Frederick J Adams, Clevedon, GB;
Cam Gears Limited, Hertfordshire, GB;
Abstract
A speed control system includes a pair of rotatable plates having at least one power transmission roller positioned in a toroidal track formed by annular grooves in the plates. Each plate is received within a rotatable housing to which it is drivingly connected by means of a cooperating track follower and helical track so that the plate rotates with the associated housing but is free to move axially relative thereto in a screw-like motion. One housing is driven by an engine and its plate drives the other plate by means of the power transmission roller. The roller is mounted on a carrier pivotally mounted about an axis which is substantially normal to the axis of rotation of the plates and is offset from the center of the roller so that, on axial displacement of the plates, the carrier pivots so that the positions of engagement between the roller and the respective grooves change thus effecting a change in relative angular velocity of the plates. The plates are biased towards each other and into engagement with the roller by fluid under pressure in an expansible chamber associated with one of the plates and by a spring acting on the other plate. The pressure in the expansible chamber is controlled in response to the rotational speed of one of the plates.