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:
Aug. 11, 1981
Filed:
Jul. 18, 1979
Nolte V Sproul, Canton, OH (US);
Dyneer Corporation, Westport, CT (US);
Abstract
A hydraulic tensioning device for maintaining a predetermined amount of tensioning force on an endless drive belt for the vehicle accessories drive system. A hydraulic cylinder is adapted to be mounted in a fixed position with respect to the vehicle engine and is operatively connected to the hydraulic fluid system of the engine. A bellcrank mechanism is pivotally mounted on the cylinder and has a belt-engaging idler pulley rotatably mounted on an extended end of one of the levers. The other lever is operatively engaged by the cylinder piston which pivots the idler pulley into tensioning engagement with the drive belt. A check valve is provided in the incoming hydraulic fluid passage of the cylinder and keeps that portion of the cylinder chamber which is located behind the piston filled with hydraulic fluid to maintain a constant predetermined tensioning force on the belt whether the engine is running or stopped, and to provide a shock-absorbing damping action for the idler pulley. The cylinder is connected to the power steering pump of the vehicle to provide a relatively high pressure to the cylinder for activation of the piston.