A vehicle lift includes a vehicle support member, a cylinder, and a controller. A linear transducer—such as a string potentiometer—is (preferably removably) positioned inside the cylinder. The transducer detects the position of the cylinder and sends a corresponding signal to a controller that controls the height of the support member in response to the signal. The cylinder acts on the vehicle support member through a scissor mechanism, parallelogram linkage, or straight vertical hydraulic lifting.

A vehicle lift includes a vehicle support member, a cylinder, and a controller. A linear transducer—such as a string potentiometer—is (preferably removably) positioned inside the cylinder. The transducer detects the position of the cylinder and sends a corresponding signal to a controller that controls the height of the support member in response to the signal. The cylinder acts on the vehicle support member through a scissor mechanism, parallelogram linkage, or straight vertical hydraulic lifting.

An air pressure controller having an inlet and an outlet, the controller may be configured to reduce air pressure between the inlet and the outlet and includes an exhaust port configured to exhaust air if a pressure at the outlet rises above a predetermined level.

An air pressure controller having an inlet and an outlet, the controller may be configured to reduce air pressure between the inlet and the outlet and includes an exhaust port configured to exhaust air if a pressure at the outlet rises above a predetermined level.

A hydraulic jack includes an oil cylinder, an oil tank, and an oil storage barrel. The oil storage barrel includes a front portion and a back portion which are opposite to each other; an oil outlet of the oil cylinder is connected with an oil inlet at the front portion of the oil storage barrel by means of an oil inlet pipe; and an oil inlet of the oil tank is connected with an oil outlet at the front portion of the oil storage barrel by means of an oil outlet pipe, the oil inlet pipe and the oil outlet pipe are provided with switching valves for alternatively turning on the oil inlet pipe and the oil outlet pipe. A partition plate that is capable of moving along a barrel wall and an elastic telescoping member are provided inside the oil storage barrel.

A manual vehicle ramp jack with an auxiliary hydraulic jack including a pair of parallel tire ramps and a lifter base disposed on the front end of each tire ramp, which has a riser plate movably disposed within a central aperture thereof from a lowered, recessed condition to an alternate raised condition. Each riser plate is provided to receive a tire therein. A manually operated mechanical foot jack is in operational communication and a mechanical hydraulic toe jack is in alternate operational communication with the riser plate of each lifter base. A foot-depressible crossbeam operationally connects the foot jacks together which permits the foot jacks to be operated simultaneously.

A manual vehicle ramp jack with an auxiliary hydraulic jack including a pair of parallel tire ramps and a lifter base disposed on the front end of each tire ramp, which has a riser plate movably disposed within a central aperture thereof from a lowered, recessed condition to an alternate raised condition. Each riser plate is provided to receive a tire therein. A manually operated mechanical foot jack is in operational communication and a mechanical hydraulic toe jack is in alternate operational communication with the riser plate of each lifter base. A foot-depressible crossbeam operationally connects the foot jacks together which permits the foot jacks to be operated simultaneously.

A push-up system for heavy loads comprising multiple lift modules that are usable to collectively support and raise a load, wherein each lift module is capable to receive a support beam on top of it, and wherein the support beam is placeable on top of the lift module in at least one of a first direction and a second direction which traverses the first direction, and wherein each lift module is equipped with supports for the support beam, wherein the supports are swivably mounted at an upper end of the lift module and arranged to be displaceable between a first position wherein the support's guiding surface is horizontal and a second position wherein the supports are swiveled away from the first position so as to arrange that the support's guiding surface is perpendicular with said upper face of the lift module.

A system is used for lifting a heavy oversized structural element. At least two opposing lifts are placement adjacent opposing sides of the element. Each lift includes a base, a tower, an elevator, and an actuator. The tower extending vertically from the base, and the elevator is disposed on the tower. A support extends from the elevator outward from the tower to engage a point on the element. A guide of the elevator is configured to ride along a rail of the tower. The actuator is connected to the elevator and is configured to move with the elevator vertically along the tower. The actuator can include a strand jack disposed on the elevator. Hydraulic operation of the stand jack moves the jack and elevator along a strand extending along the tower. The arrangements of the lifts leave space below the raised element free for access to other operations.

A system is used for lifting a heavy oversized structural element. At least two opposing lifts are placement adjacent opposing sides of the element. Each lift includes a base, a tower, an elevator, and an actuator. The tower extending vertically from the base, and the elevator is disposed on the tower. A support extends from the elevator outward from the tower to engage a point on the element. A guide of the elevator is configured to ride along a rail of the tower. The actuator is connected to the elevator and is configured to move with the elevator vertically along the tower. The actuator can include a strand jack disposed on the elevator. Hydraulic operation of the stand jack moves the jack and elevator along a strand extending along the tower. The arrangements of the lifts leave space below the raised element free for access to other operations.