Endless belt power transmission systems or components – Guard or housing for belt or pulley – Extending along entire length of belt run
Patent
1997-05-22
1998-09-22
Hannon, Thomas R.
Endless belt power transmission systems or components
Guard or housing for belt or pulley
Extending along entire length of belt run
474148, F16H 706, F16H 720
Patent
active
058106871
ABSTRACT:
A power window transmission includes a loop-like endless chain (12) surrounding and engaging opposed driving and driven sprocket (20, 18). The driving sprocket (20) is mechanically coupled to a motor (26) and the driven sprocket (18) is driven by the chain (12) to drive window crank handle shaft coupled thereto to operate the window. The sprockets (18, 20) are encased in separate and individual casings (32, 34) each of which is fixed to the car door structure with a bracket (64) provided with stepless-adjustable fastening device (68) fastened precisely to the car door structure. The sections of the chain located outside the sprocket casings (32, 34) are enclosed in flexible tubes (80) incorporating spring-based slack take-up device (81) arranged between an end of each of the tubes (80) and one of the sprocket casings (32, 34) to take up slacks of the tubes (80) following the change of length of the chain (12). The casings (32, 34) are also provided with lips (40) located around the inner rims thereof to support the sprocket (18, 20) against the thrusts applied thereto by the motor shaft and the window crank handle shaft.
REFERENCES:
patent: 2640367 (1953-06-01), Reiser
patent: 3885471 (1975-05-01), Morine et al.
patent: 4609365 (1986-09-01), Eberle
patent: 4767386 (1988-08-01), Spaggiari
patent: 5440944 (1995-08-01), Chen
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