B - Operations – Transporting – 65 – G
Patent
B - Operations, Transporting
65
G
74/263
B65G 23/44 (2006.01)
Patent
CA 1147170
(59-2) ABSTRACT A hydraulic tensioning arrangement for and endless drive belt for a vehicle accessories drive system. The vehicle alter- nator is pivotally mounted on the engine and is driven by a pulley which is drivingly engaged with the drive belt. A hydrau- lically actuated piston is mounted in a generally fixed position on the engine closely adjacent to the alternator and is opera- tively connected to the alternator for pivotally moving it to a belt tensioning position. Hydraulic fluid is supplied to the piston cylinder from the vehicle's power steering fluid supply. A ratchet bar is mounted on the piston cylinder and is slidably engaged in a guide bracket mounted on the alternator. A spring- biased pawl is mounted on the guide bracket and is engageable with a series of teeth formed on the extended end of the ratchet bar. The pawl-teeth engagement prevents movement of the alter- nator away from the belt tensioning position during a decrease in hydraulic fluid or pressure in the piston cylinder to mechanically maintain a constant predetermined belt tensioning force on the belt at all times without the use of springs.
370010
Macrae & Co.
Spun Steel Ltd.
LandOfFree
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