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. 15, 1981
Filed:
Sep. 27, 1979
William F Esthimer, Walpole, MA (US);
Bird-Johnson Company, Walpole, MA (US);
Abstract
Possible damage to a clutch caused by engagement or disengagement when the engine is running at a high speed is prevented by an engine-clutch control interlock system which prevents the clutch from being engaged or disengaged except when the engine is running at a speed below a nominal, selected idle speed. The system comprises an engine speed monitor which produces a speed signal indicative of whether the engine is running above or below the selected idle speed, a clutch control monitor which produces a signal indicative of whether or not a clutch actuator control signal is being generated and a clutch status monitor which produces a signal indicative of whether the clutch is engaged or disengaged. A clutch actuator signal is conducted to the clutch either to engage or disengage it only when the monitors indicate that a clutch control signal is being generated and the engine is running below the nominal idle speed. A speed control signal is conducted to the engine speed controller only when the clutch status monitor indicates that a disengaged clutch has engaged.