Implements or apparatus for applying pushing or pulling force – Portable implements or apparatus for tensioning flexible... – Including rotatably driven drum for engaging either material...
Patent
1991-02-15
1993-06-08
Matecki, Katherine
Implements or apparatus for applying pushing or pulling force
Portable implements or apparatus for tensioning flexible...
Including rotatably driven drum for engaging either material...
254364, 254376, 410103, 242107, B66D 532, B61D 4500
Patent
active
052172082
ABSTRACT:
Methods and apparatus for maintaining a restraining device placed over a load in constant tension as the load shifts during transit are disclosed. The present invention provides a winch having two ratchets, the first of which provides the initial tension in the restraining device. The second ratchet is connected to a spring, which is connected to the shaft upon which the restraining device is wound. By operating the second ratchet, the spring is displaced and an urging force is created. Upon a reduction of the initial tension in the restraining device, the urging force acts upon the shaft, advancing the shaft and the first ratchet, thereby maintaining the tension in the restraining device. Since the first ratchet is advanced, any slack in the restraining device is accumulated and the strap is locked into a tighter position. Methods and apparatus providing a locking bar to prevent unauthorized use of the winch and theft of the restraining device are also disclosed.
REFERENCES:
patent: 565064 (1896-08-01), Wright et al.
patent: 2991975 (1961-07-01), Alexander
patent: 3827650 (1974-08-01), Stevens et al.
patent: 4063712 (1977-12-01), Arbogast
patent: 4382736 (1983-05-01), Thomas
Matecki Katherine
Union Camp Corporation
Wissing William K.
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