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2. Active heave compensation - Wikipedia

   en.wikipedia.org/wiki/Active_heave_compensation

   [4] [5] Hydraulic "active boost" winches control the oil flow from the pump(s) to the winch so that the target position is reached. Hydraulic winch systems can use accumulators and passive heave compensation to form a semi-active system with both an active and a passive component. In such systems the active part will take over when the passive ...

3. Level luffing crane - Wikipedia

   en.wikipedia.org/wiki/Level_luffing_crane

   Later systems have used modern electronic controls and quickly reversible motors with good slow-speed control to the hoist winch motors, so as to give a positioning accuracy of inches. Some early systems used controllable hydraulic gearboxes to achieve the same result, but these added complexity and cost and so were only popular where high ...

4. M1120 HEMTT Load Handling System - Wikipedia

   en.wikipedia.org/wiki/M1120_HEMTT_Load_Handling...

   With the exception of the wrecker variant, this chassis is common on all HEMTT variants Bolted construction with Grade 8 bolts is used throughout. A centrally mounted self-recovery winch is an option and this is fitted to around 20% of production. [1] The two-door forward control cab seats two.

5. Anchor windlass - Wikipedia

   en.wikipedia.org/wiki/Anchor_windlass

   The combined port anchor windlass and winch of the modern ferry Stena Britannica. The hydraulically operated brake and pawl allows the anchor to be dropped from the ship's bridge. [citation needed] A windlass is a machine used on ships that is used to let-out and heave-up equipment such as a ship's anchor or a fishing trawl. On some ships, it ...

6. High lead logging - Wikipedia

   en.wikipedia.org/wiki/High_lead_logging

   The "high lead" feature is added by elevating both lines near the winch or 'head' end. This is accomplished by running the lines through a block called the "head block" because it is on the head end of the project. Early on, it was customary to trim and top a tree making it into a 'spar pole' or 'spar tree' for the purpose of supporting the ...

7. Shuttle valve - Wikipedia

   en.wikipedia.org/wiki/Shuttle_valve

   Winch brake circuit: a shuttle valve provides brake control in pneumatic winch applications. When the compressor is operated the shuttle valves direct air to open the brake shoes. When the control valve is centered, the brake cylinder is vented through the shuttle valve, and the brake shoes are allowed to close. [clarification needed]

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   mail.aol.com

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9. Winch - Wikipedia

   en.wikipedia.org/wiki/Winch

   [3] [4] The snubbing winch is used to pull vehicles out of mud, snow, sand, rocks, and water, and to pull vehicles through or over obstacles. The winch is made of cable made up of a braided synthetic rope, or a steel cable wrapped around a motorized drum. Each is controlled electronically, allowing the operator to control the winch speed. [5]