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:
Sep. 05, 1978
Filed:
Jun. 24, 1977
William I Callaghan, Mentor, OH (US);
Towmotor Corporation, Mentor, OH (US);
Abstract
A rocker shaft is rotatably mounted and integral with a control valve of a hydrostatic transmission. The valve shaft may be rotated in an arc to either side of a neutral position. A housing is mounted to the control valve with rocker shaft projecting into the housing. A pair of levers are pivotally mounted on the rocker shaft in scissored relationship thereon and an actuating arm is rotatably mounted on the housing to engage camming surfaces defined on first ends of the levers. A drive member or dog is secured to the rocker shaft to engage between second ends of the levers whereby pivotal movments of the actuating arm will transmit pivotal movements of the levers to the rocker shaft to control mechanisms of the control valve. The second ends of the levers are biased towards each other into engagement with the drive member by a coil spring and a stop lug is secured on each of the levers to engage and pivot the other one of the levers in response to pivotal movements of the actuating arm. The stop lug is incorporated as a device to assure positive response of the valve shaft at a high speed reversal of an input shaft secured to the actuating arm.