Gearless Ratcheting Binder
AssigneeColumbus McKinnon Corporation
InventorWilliam P. Wells, Jr.
Life of this patent
Estimating the term…
Abstract
A gearless binder has a main tube with internal threads at opposed open ends. The gearless binder has a pair of semicircular threaded shafts threadably received in the opposed open ends such that, when the shafts are connected by hooks to a chain and prevented from rotation, the rotation of the tube by a gearless mechanism causes the shafts to simultaneously move inward relative to the tube increasing tension on the opposed hooks to secure a load. A spring disposed around the tube provides a gripping force on the tube to allow for rotation of the tube in a first direction to cause the threaded members to enter the tube to secure a load.
Claims19
A gearless binder comprising:
- an internally threaded tube having opposing, open ends;
- threaded shafts threadably inserted into the opposing open ends, the threads in the tube and the threads on the shafts adapted to provide common contraction and extension of the shafts relative to the tube interior with the shafts not turning and the tube turning,
- a helical spring disposed around the outside of the tube;
- wherein opposite ends of the spring are configured such that rotation of the one end in a first direction causes the spring to tighten around the tube and rotation of the other end in a second direction opposite the first direction causes the spring to loosen its grip on the tube.
A gearless binder comprising:
- an internally threaded tube having opposing, open ends;
- threaded shafts threadably inserted into the opposing open ends and the threads in the tube and on the shafts adapted to provide common contraction and extension of the shafts relative to the tube interior with the shafts not turning and the tube turning;
- a helical spring disposed around the outside of the tube;
- a handle configured to rotatably engage with opposite ends of the spring such that rotation of the handle in a first direction causes the spring to tighten around the tube and rotation of the handle in a second direction opposite from the first direction causes the spring to loosen its grip on the tube such that the spring can be moved into a new location along the length of the tube;
- and,
- a housing mounted around the tube and enclosing the spring and a portion of the handle.
A gearless binder comprising:
- an internally threaded tube having opposing, open ends;
- threaded shafts threadably inserted into the opposing open ends and the threads in the tube and on the shafts adapted to provide common contraction and extension of the shafts relative to the tube interior with the shafts not turning and the tube turning;
- a helical spring disposed around the outside of the tube, the helical spring having a first end and a second end disposed opposite the first end;
- and,
- means for rotating the first end of the spring in a first direction to wrap the spring tighter around the tube and means for rotating the second end of the spring in a second direction to unwrap the spring from the tube.
Dependencies are inferred from the claim text.