Manual multi-ratio tension-applying device

Details Manual multi-ratio tension-applying device Manual multi-ratio tension-applying device

2005-12-06

2005-12-06

Graham, Matthew C. (Department: 3683)

Machine element or mechanism

Control lever and linkage systems

Elements

C074S524000, C074S546000, C074S547000, C254S342000, C254S365000, C254S344000, C303S001000

Reexamination Certificate

active

06971278

ABSTRACT:
A tension applying device including a housing in which are mounted a primary shaft, a main shaft, a pinion shaft, and a load-member sheave shaft. A ratchet handle is associated with the primary shaft for imparting rotation thereto when pumped by a user. Rotation of the primary shaft causes rotation of the main shaft which, in turn, is imparted to the pinion shaft and to a load-member sheave mounted on the load-chain sheave shaft. Rotation of the load-member sheave then applies tension to the load member which, in turn, is connected to a desired application. The tension applying device further includes a plurality of drive mechanisms for achieving different mechanical advantages between the ratchet handle and the load-member sheave, thereby allowing a desired input force to attain a desired output force. Further, the load on the tension member may be used for automatically switching between the plurality of drive mechanisms and for a load limit lock-up.

REFERENCES:
patent: 3712155 (1973-01-01), Stommel et al.
patent: 4921219 (1990-05-01), Ottemann et al.
patent: 5127283 (1992-07-01), O'Brien et al.
patent: 5842684 (1998-12-01), Aho
patent: 6053069 (2000-04-01), Stroer
patent: 6179093 (2001-01-01), Daugherty, Jr.

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