Winch for roller reefing

• US 4,924,795 A
• Filed: 11/18/1988
• Issued: 05/15/1990
• Est. Priority Date: 11/18/1988
• Status: Expired due to Fees

• Current Assignee: Lewmar Marine Ltd. (LCI Industries)
• Original Assignee: International Marine Industries, Inc.
• Inventors: Ottemann, William C.
• Primary Examiner(s): Peters, Jr., Joseph F.
• Assistant Examiner(s): Bartz, Clifford T.
• Application Number:
  US07/273,460
• Time in Patent Office: 543 Days
• Field of Search: 114/102-107
• US Class Current: 114/107
• CPC Class Codes: B63H 2009/105 using drives for actuating reefing mechanism, e.g. roll reefing drives
• CPC Class Codes: B63H 9/1028 by furling around stays

Abstract

In a sailboat having a sail such as a Genoa jib with roller reefing for spirally winding the sail on a fairing around a stay, a winch mechanism for turning the fairing about the stay and spirally winding the sail to and from the fairing is disclosed. The winch includes a high mechanical advantage clutch, preferably a cone clutch, normally engaged by load between the sail and sheet exerting an unwinding force upon the fairing through the normally engaged clutch to a normally stationary clutch driving shaft. The clutch driving shaft has a first clutch member ratchetted from the vessel to permit turning of the entire clutch for taking in of the sail. The clutch includes a second clutch member attached for rotation with the fairing relative to the vessel and driven for both sail take-up and let out by the normally stationary clutch driving shaft. The normally stationary clutch driving shaft is in turn driven usually by a hydraulic motor or upon motor failure by a ratchetted winch handle.

Claims

1. A winch for rotating a fairing about a stay on a sailing vessel, the fairing having a sail attached thereto for roller reefing of the sail in a spiral wind about the fairing, the winch comprising:

a normally stationary shaft having a shaft for driving a clutch;

a high mechanical advantage clutch member having a first clutch member and a second clutch member relatively movable with respect to each other between positions of normal engagement and a position of disengagement;

said first clutch member mounted for one way rotation relative to the vessel in a first direction to permit said sail to be gathered to said fairing for the reefing of said sail;

said second clutch member having a peripheral portion driven from said normally stationary shaft said second clutch member attached to said fairing for rotation with said fairing for reefing in and reefing out said sail;

a clutch engagement member positioned between said normally stationary shaft and said fairing, said clutch engagement member urging said clutch into said normally engaged position responsive to torque transmitted between said normally stationary shaft and said fairing; and

,

driving means attached to said normally stationary shaft for maintaining said shaft stationary during nondriving operation, rotating said first and second clutch members in a first direction for engaging said clutch and taking in said sail, and rotating said second clutch member in a second and opposite direction for temporarily disengaging said clutch to permit release of said sail corresponding to the rotation of said normally stationary shaft.

2. The invention of claim 1 and wherein said clutch engagement member acting responsive to torque between said normally stationary shaft and said fairing includes opposed radial ramps, one said radial ramp rotating with respect to said fairing and acting on said second clutch member said second radial ramp configured in said second clutch member, said radial ramps adapted for engagement of said clutch member responsive to torque transmitted from said fairing to said normally stationary shaft.

3. The invention of claim 1 and where said clutch engagement member includes mating first and second coarse screw threads said first mating screw threads being configured to rotate responsive to torque transmitted from said fairing to said normally stationary shaft;

said second mating screw threads being configured in said second clutch member whereby engagement of said clutch normally occurs.

4. The invention of claim 1 and wherein said normally stationary shaft is driven by a hydraulic motor.

5. The invention of claim 1 and wherein said normally stationary shaft is driven by a ratchetted winch handle.

6. The invention of claim 1 and wherein said normally stationary shaft drives said second clutch member through mating gears.