Endless belt power transmission systems or components – Means for adjusting belt tension or for shifting belt,... – Tension adjuster or shifter driven by electrical or fluid motor
Patent
1993-05-06
1994-08-02
Bui, Thuy M.
Endless belt power transmission systems or components
Means for adjusting belt tension or for shifting belt,...
Tension adjuster or shifter driven by electrical or fluid motor
305 10, F16H 700
Patent
active
053341066
ABSTRACT:
A hydraulic recoil and belt tension control system is connected to a hydraulic motor of an endless belt propulsion device so that a common source of fluid is used to both drive the hydraulic motor and maintain proper tension in a drive belt of the propulsion device. The hydraulic recoil and belt tension control system includes first and second check valves to direct pressurized fluid from the appropriate one of first and second motor conduits to an actuating chamber of a belt tension actuator. A relief valve relieves excessive pressure in the actuating chamber and returns fluid exhausted from the actuating chamber during recoil through either of third and fourth check valves to the appropriate one of the first and second motor conduits. Utilizing the hydraulic motor drive circuit as the source of fluid for the hydraulic recoil and belt tension control systems eliminates at least two conduits between the propulsion device and the vehicle to which the propulsion device is mounted.
REFERENCES:
patent: 3310127 (1967-03-01), Siber et al.
patent: 3327798 (1967-06-01), Siber et al.
patent: 3901563 (1975-08-01), Day
patent: 3972569 (1976-08-01), Bricknell
patent: 4543079 (1985-09-01), Matsuda et al.
patent: 4893883 (1990-01-01), Satzler
patent: 5176581 (1993-01-01), Kumm
patent: 5254047 (1993-10-01), Anderson
Bui Thuy M.
Caterpillar Inc.
Grant John W.
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