Pumping ratchet winch
OwnerThomas G. Harvey, Jr.inventor
Life of this patent
Estimating the term…
Abstract
The handle arm of a ratchet winch is convertibly connectible to the ratchet drive lever either to provide a stiff arm swingable conjointly with the ratchet drive lever relative to the winch frame for high-speed operation of the winch, or to provide a pumping arm rockable relative to the ratchet drive lever and engageable with the frame to pry the ratchet drive lever and swing it incrementally relative to the winch frame for high-power operation of the winch. The winch can be anchored by a tie bridging across the winch frame. Wire rope is led onto the winch drum by a traveling fairlead.
Claims21
In a ratchet winch including a drum for hauling a line, a frame mounting the drum for rotation, ratchet means for rotatively driving the drum relative to the frame and having a ratchet wheel, a drive pawl engageable with the ratchet wheel to drive it, a ratchet arm swingable to effect ratchet wheel rotating movement of the drive pawl, stop means engageable with the ratchet wheel to hold it against retrograde rotation and a handle arm for swinging the ratchet arm, the improvement comprising a hinge joint connecting the ratchet arm and the handle arm, and conversion means for selectively converting said hinge joint between a stiff arm condition in which the ratchet arm is swingable conjointly with the handle arm relative to the frame for effecting high-speed rotation of the drum and a pumping arm condition in which the handle arm is rockable relative to the ratchet arm about the hinge joint axis for swinging the ratchet arm incrementally relative to the frame through an angle much smaller than the angle of swing of the handle arm relative to the frame for effecting high-power rotation of the drum.
In a winch including a drum for hauling a line, a frame mounting the drum for rotation and means for rotatively driving the drum relative to the frame, the improvement comprising a tie slidably connected to the frame, bridging the frame and having one end connected to one end of the line, the other end of the line being connected to the drum and a portion of the line between its ends being connected to a load, anchor-connecting means connecting the other end of said tie to a fixed anchor remote from the frame, said tie thereby transmitting tension between such load and such anchor bypassing the frame, and frame-connecting means for connecting the frame and said tie for providing relative movement of said frame and said tie, said frame-connecting means including abutment means interengaged between the frame and said tie.
In a winch including a drum for hauling a line, a frame mounting the drum for rotation relative to the frame and drive means for rotatively driving the drum relative to the frame, the improvement comprising a traveling fairlead for line to be wound on the drum including a guide tube through which the line passes, a guide roller engageable by the line and carried by said tube with its rotative axis perpendicular to the longitudinal axis of said tube, and mounting means mounting said tube for reciprocation axially of the drum as the line is wound and for rotation of said tube about its axis in all reciprocated positions to displace said guide roller orbitally about the longitudinal axis of said tube, said mounting means including an elongated slot in said frame having its length substantially parallel to the drum axis and slidably receiving said tube.
In a ratchet winch including a drum for hauling a line, a frame mounting the drum for rotation, ratchet means for rotatively driving the drum relative to the frame and having a ratchet wheel, a drive pawl engageable with the ratchet wheel to drive it, a ratchet arm swingable to effect ratchet wheel rotating movement of the drive pawl, means engageable with the ratchet wheel to hold it against retrograde rotation, and a handle arm for swinging the ratchet arm, the improvement comprising a tie carried by the frame and bridging the frame, means connecting said tie to a load and an anchor independently of the frame for transmitting stress between such load and such anchor bypassing the frame, a hinge joint connecting the ratchet arm and the handle arm, and conversion means for selectively converting said hinge joint between a stiff arm condition in which the ratchet arm is swingable conjointly with the handle arm relative to the frame for effecting high-speed rotation of the drum and a pumping arm condition in which the handle arm is rockable relative to the ratchet arm about the hinge joint axis for swinging the ratchet arm incrementally relative to the frame through an angle much smaller than the angle of swing of the handle arm relative to the frame for effecting high-power rotation of the drum.
In a ratchet winch including a drum for hauling a line, a frame mounting the drum for rotation, ratchet means for rotatively driving the drum relative to the frame and having a ratchet wheel, a drive pawl engageable with the ratchet wheel to drive it, a ratchet arm carrying said drive pawl and swingable about the axis of the drum relative to the frame to effect ratchet wheel rotating movement of the drive pawl, and stop means engageable with the ratchet wheel to hold it against retrograde rotation, the improvement comprising a handle arm, pivot means mounting said handle arm on the ratchet arm for swinging relative to the ratchet arm about the axis of said pivot means lever means including a cam follower carried by said handle arm and a cam carried by the frame and engageable by said cam follower for effecting incremental swinging of the ratchet arm relative to the frame by swinging of said handle arm relative to the ratchet arm and the frame by pumping manipulation through an angle much greater than the angle of incremental swinging of the ratchet arm relative to the frame.
Dependencies are inferred from the claim text.