Power plants – Pressure fluid source and motor – Distinct structure metering and dispensing a stroke length...
Patent
1988-11-21
1990-08-21
Garrett, Robert E.
Power plants
Pressure fluid source and motor
Distinct structure metering and dispensing a stroke length...
60461, 91171, 91532, 137 99, B66F 346, B66F 330
Patent
active
049495402
ABSTRACT:
A hydraulic system having multiple actuators is provided with positive pressure flow equalization for both advancing and retracting movements of the system by means of first and second flow divider elements for each actuator. The flow divider elements are cross-coupled between the actuators, a controllable source of pressurized fluid and a reservoir. The flow divider elements are positive-displacement gear or vane pump units that are connected by a common shaft for coordinating fluid flow to the various actuators. Two or more of the actuators can be connected for lifting a load such as an automobile, the system being provided with safety latches at each actuator, the flow dividers not only coordinating the actuator movements during normal raising and lowering operation, but also preventing loss of synchronization of the actuators in case of engagement of a subset only of the latches. Synchronism is maintained even under negative loading because positive pressure is maintained between the dividers and each of the actuators, preventing cavitation.
REFERENCES:
patent: 2632472 (1953-03-01), Livers
patent: 4034649 (1977-07-01), Harvey et al.
patent: 4324411 (1982-04-01), MacKenzie
patent: 4335894 (1982-06-01), Swanson
patent: 4337959 (1982-07-01), Bettin et al.
patent: 4339139 (1982-07-01), Swanson
patent: 4354688 (1982-10-01), Swanson
patent: 4437484 (1984-03-01), Laing et al.
patent: 4475714 (1984-10-01), Heiskell et al.
patent: 4496004 (1985-01-01), Frase et al.
patent: 4500071 (1985-02-01), Bagwell et al.
patent: 4573663 (1986-03-01), Nussbaum
"Ben Pearson Tubemaster" brochure, 6 pp., Ben Pearson Tubemaster, Pine Bluff, AR no date.
"Challenger Excel Lifts" brochure, 2 pp., Challenger Lift Division, VBM Corporation, Louisville, KE, no date.
"Rotary Lift SPOA-84" brochure, 6 pp., Rotary Lift A Dover Industries Company, Memphis, TN, 1987.
"Bishamon Electro-Hydraulic Automobile Lift" brochure, 4 pp., Sugiyasu Iron Works Co., Ltd., Takahama, Japan, no date.
"Benwil Top Lift Model GPOR-7R" brochure, 4 pp., Benwill Industries, Inc., Carson, CA. 1988.
Bishamon Industries Corporation
Garrett Robert E.
Kapsalas George
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