Overspeed protection system for a vehicle

Details Overspeed protection system for a vehicle Overspeed protection system for a vehicle

1994-12-22

1996-11-19

Pitts, Andrea L.

192 clutches and power-stop control

Clutch and brake

192 12C, 192105BA, B60K 4124

Patent

active

055753655

ABSTRACT:
The invention provides an overspeed protection system for a vehicle such as a mine skip travelling along a vertical set of rails 60. In use an idler wheel 62 in contact with a rail 60 rotates a shaft 12 forming part of a clutch 10 at speeds which are directly proportional to the linear travelling speed of the vehicle. When the rotational speed of the shaft 12 exceeds a predetermined limit the clutch 10 frictionally transfers torque from the shaft 12 to a shaft 14, which in turn drives an hydraulic pump 64. The pump 64 pressurises hydraulic fluid in a supply line 67 until it opens a valve 68, which admits a pressurised fluid from a reservoir 74 into a braking means 80, which performs a clamping action on an associated rail 60 to restrain the motion of the vehicle.

REFERENCES:
patent: 1594259 (1926-07-01), Hardman
patent: 2017352 (1935-10-01), Quick
patent: 2468092 (1949-04-01), Mahnke
patent: 2652230 (1953-09-01), Hoyle et al.
patent: 2778469 (1957-01-01), McIntyre
patent: 2833384 (1958-05-01), Wilson
patent: 3187871 (1965-06-01), Rice
patent: 3367465 (1968-02-01), Newman
patent: 3610382 (1971-10-01), Makinson
patent: 4175727 (1979-11-01), Clarke

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