Hydraulic Vehicle Lift System
AssigneeRoland Hörnstein GmbH & Co., KG
InventorRoland Hornstein
Life of this patent
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Abstract
A hydraulic vehicle lift system includes at least one hydraulic vehicle life and one hydraulic drive unit for lifting and lowering the at least one vehicle life. The hydraulic vehicle lift system is characterized in that the hydraulic vehicle lift system has at least one further hydraulic vehicle lift and at least one further hydraulic drive unit for lifting and lowering the at least one further hydraulic vehicle lift, and in that the hydraulic vehicle lifts can be hydraulically connected to the respective other hydraulic drive unit in order to be lifted and lowered.
Claims21
1-9. (canceled)
A hydraulic vehicle lift system having at least one first hydraulic vehicle lift and one first hydraulic drive unit for raising and lowering the at least one first vehicle lift wherein the vehicle lift system comprises at least one additional second hydraulic vehicle lift and at least one additional second hydraulic drive unit for raising and lowering the at least one additional second hydraulic vehicle lift and wherein the hydraulic vehicle lifts for raising and lowering by hydraulic means are operatively connected such that the at least one first hydraulic drive unit can raise and lower the at least one additional second hydraulic vehicle lift and the at least one additional second hydraulic drive unit can raise and lower the at least one first hydraulic vehicle lift.
A hydraulic vehicle lift system that comprises:
- (a) a first vehicle lift group comprising:
- (i) a plurality of first vehicle lifts, wherein each first vehicle lift is operatively associated with a control unit that includes a raising valve and a lowering valve;
- (ii) a first drive unit having a firsts reservoir containing hydraulic fluid, a first pump and first means for engaging the raising valve and the lowering valve;
- (iii) a first pressure manifold that supplies hydraulic fluid to the first vehicle lifts;
- and
- (iv) a first return flow manifold that returns hydraulic fluid to the first reservoir;
- (b) a second vehicle lift group comprising:
- (i) a plurality of second vehicle lifts, wherein each second vehicle lift is operatively associated with a control unit that includes a raising valve and a lowering valve;
- (ii) a second drive unit having a second reservoir containing hydraulic fluid, a second pump and second means for engaging the raising valve and the lowering valve;
- (iii) a second pressure manifold that supplies hydraulic fluid to the second vehicle lifts;
- and
- (iv) a second return flow manifold that returns hydraulic fluid to the second reservoir;
- and
- (c) a valve controlled connection line that permits fluid communication between the first and second pressure manifolds
A method of operating a hydraulic vehicle lift system, that includes multiple sets of vehicle lifts which are connected to one another by a hydraulic line system and wherein each vehicle lift is operatively associated with a control unit that includes a raising valve and a lowering valve, which comprises the steps of:
- (a) pumping hydraulic fluid through the hydraulic line system to a raising valve until pressure reaches a desired limit;
- (b) opening the raising valve manually to reduce the pressure whereupon a pump is activated to pump hydraulic fluid to actuate a vehicle lift;
- and
- (c) opening the lowering valve manually to lower the vehicle lift without an external power source.
Dependencies are inferred from the claim text.