Winch control

Details Winch control Winch control

1976-11-17

1977-09-20

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

60422, 60484, 60905, 91413, 74471R, F15B 102, F15B 1116

Patent

active

040487997

ABSTRACT:
A control for a hydraulically operated winch or the like having a hydraulically disengaged brake, a multi-speed, hydraulically controlled transmission, and a drum to be driven or braked. The control system includes means whereby the transmission is placed in neutral, automatically, whenever the brake is to be disengaged to lower a load and a control valve including a spool with small and large slots along with a drum-driven metering pump controls fast and slow lowering speeds. Emergency free fall of the load is accomplished in the valve by bypassing the small metering slot. An arrangement of an accumulator and check valves allow hydraulic disengagement of the brake even if the engine is dead and there is provided a recirculating hydraulic circuit to conserve oil in such an instance so that the accumulator volume can be minimized. A system is included whereby the accumulator may be discharged, when the prime mover is inoperative to allow the operator of the winch to leave the location with the load suspended with the knowledge that the load cannot be lowered either intentionally or accidentally.

REFERENCES:
patent: 2775429 (1956-12-01), Ashton
patent: 2983101 (1961-05-01), Tyler
patent: 3519247 (1970-07-01), Christison
patent: 3685290 (1972-08-01), Kruschg

Affiliated with

Also associated with

Rating

Winch control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Winch control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Winch control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-664529