Tensioning device for flexible drive element

Details Tensioning device for flexible drive element Tensioning device for flexible drive element

1986-01-22

1987-05-05

Novosad, Stephen J.

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

474111, F16H 708

Patent

active

046628622

ABSTRACT:
A tensioning device (10) for a flexible drive element (16), the tensioning device comprising a first tensioning member (40) shaped to form a channel (52) having a first contact surface (58), and a second tensioning member (140) shaped to form a channel (152) having a second contact surface (158). Straps (34, 36) and engagement means (42, 44, 142, 144) secure the first and second tensioning members a selected distance away from one another by means of a ratchet-like mechanism arranged such that the force required to move the tensioning members toward one another is smaller than the force required to move the tensioning members away from one another. The tensioning device may be operated without any means securing the tensioning device with respect to the sprockets. Grooves (60, 160) are provided in the respective channels to maintain the sides of the flexible drive element out of contact with the channel sides.

REFERENCES:
patent: 976115 (1910-11-01), Bard
patent: 2210276 (1940-08-01), Bremer
patent: 2639623 (1953-05-01), Ausherman
patent: 2963918 (1960-12-01), Blakstad
patent: 3575058 (1971-04-01), Kraus
patent: 3630096 (1971-12-01), Brewer
patent: 3673884 (1972-07-01), Southiere
patent: 3811332 (1974-05-01), Brown et al.
patent: 3931745 (1976-01-01), Dobberpuhl
patent: 3933055 (1976-01-01), Newhouse et al.
patent: 3964331 (1976-06-01), Oldfield

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