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. 05, 1985
Filed:
Mar. 19, 1982
Stephen M Clancey, Battle Creek, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A fluid coupling device is disclosed of the type including an output coupling (13) and an input coupling member (11). The speed of operation of the coupling device is determined by the amount of fluid in the operating chamber (37), and fluid communication from the reservoir chamber (41) into the operating chamber is controlled by movement of a valve arm (49) relative to a fill opening (50). The fill opening includes an outer edge (79) which is disposed at an angle relative to a radial line, such that the valving is of the modulating type, i.e., movement of the valve arm in response to increasing temperature results in radially outward movement of the outermost point of the flow area. In accordance with the invention, the valve arm defines an included open area (73) having a leading edge (74) and a trailing edge (75). The flow area is determined by the area of overlap (77,81) of the open area (73) and the fill opening (50). The result is a modulating but limited area which is effective to substantially reduce hysteresis of the coupling device during operation in the decreasing temperature condition, whereby the input horsepower consumed by the device is substantially reduced.