A jack assembly and a system for supporting a partially submerged structure. The jack assembly may include a fluid jack including a cylinder and a ram, the cylinder having at least one fluid chamber configured to receive a pressurized fluid to move the ram; and a valve housing removably coupled to the fluid jack for providing fluid communication between the fluid jack and at least one fluid conduit, the valve housing including a link movable from a first position toward a second position, the valve housing being secured to the jack while the link is in the first position, the valve assembly being disconnectable from the jack while the link is in the second position.

According to an aspect of the present disclosure, a multi-step height adjuster includes a base tube portion including a first base tube and a second base tube vertically reciprocating inside the first base tube; a spindle portion including a first spindle installed inside the first base tube to vertically reciprocate and a second spindle installed inside the second base tube to vertically reciprocate; and an adjustment portion installed in the spindle portion to transmit power to the spindle portion, wherein the first spindle and the second base tube are integrally moved.

Provided is a jack device rendering an operation of changing the posture of a jack cylinder easy without using a device that actively changes the posture. The jack device includes an arm, a jack body including the jack cylinder, and a reaction-force application unit supported by the arm. The reaction-force application unit makes a reaction-force moment act on the jack body in all postures from the upright posture to the storage posture in response to a force applied from the jack body. The reaction-force application unit makes a reaction-force moment greater than a self-weight moment act on the jack body in the storage posture and makes a reaction-force moment smaller than the self-weight moment act on the jack body in the upright posture.

A movable umbrella base comprises a housing (1), a wheel frame (2) disposed under the bottom of the housing (1), at least three wheels (3) connected at intervals to the wheel frame (2) and located partially under the wheel frame (2), a plurality of air bags (4) located inside a space defined by the wheel frame (2) and the housing (1), and a plurality of elastic members (6) limit displacement of the wheel frame (2) and the wheels (3) from the housing (1); when the air bags (4) are inflated, the housing (1) is lifted up relative to the wheel frame (2) and the wheels (3) from the ground; when the air bags (4) are deflated, the housing (1) is lowered relative to the wheel frame (2) and the wheels (3) and contacts the ground. The umbrella base can be moved by the air bags (4), the whole operation process is easier, and it saves more time and effort.

A pneumatic lifting device (1) comprises a pneumatic cylinder (2), and a pneumatic pump (3) for providing pressurized air to the pneumatic cylinder (2). There is a support (4) for supporting an object to be lifted, the support (4) can move between a raised position and a lowered position by the pneumatic cylinder (2). There is also a nozzle (5) for delivering pressurized air from the pneumatic pump (3). These features result in a pneumatic lifting device portable and versatile, as well as being well-suited for convenient storage in these vehicles.

A jack assembly and a system for supporting a partially submerged structure. The jack assembly may include a fluid jack including a cylinder and a ram, the cylinder having at least one fluid chamber configured to receive a pressurized fluid to move the ram; and a valve housing removably coupled to the fluid jack for providing fluid communication between the fluid jack and at least one fluid conduit, the valve housing including a link movable from a first position toward a second position, the valve housing being secured to the jack while the link is in the first position, the valve assembly being disconnectable from the jack while the link is in the second position.

The lifting/lowering device (100) includes: a first plate member (51); a second plate member (52) to which the first plate member (51) is rotatably connected; a first expansion and contraction bag (31) which is disposed between the first plate member (51) and the second plate member (52) and is capable of expanding and contracting by gas supply and exhaust; a third plate member (53) to which the second plate member (52) is rotatably connected; a second expansion and contraction bag which is disposed between the second plate member (52) and the third plate member (53) and is capable of expanding and contracting by gas supply and exhaust. The first plate member (51), the first expansion and contraction bag (31), the second plate member (52), the second expansion and contraction bag (32) and the third plate member (53) are disposed so as to overlap in a plan view.

A portable vehicle lift and methods of using the same are provided. The portable vehicle lift comprises a carriage, a head saddle, and a lift driver. The head saddle is movably connected to the carriage so that it is shiftable between a lowered position and a raised position. The lift driver supported on the carriage and configured to lift the head saddle.

A method and apparatus for lifting a process station from a processing module is described herein. The apparatus includes a lift assembly disposed on the processing module, a lift cage, and one or more guide pins. The lift assembly is disposed to be capable of reaching each of the process stations disposed within the processing module. The lift assembly is used for replacement and maintenance of the process stations and further enables the automated removal and placement of the process stations within the processing module. Maintenance methods enabled by the lift assembly are additionally disclosed herein.

An integrated vehicle jacking assembly includes a plurality of jacks that is each coupled to a bottom side of a vehicle. Each of the jacks is actuatable into an extended position for lifting a respective driver's side or passenger's side of the vehicle upwardly thereby facilitating tires on the respective driver's side or passenger's side of the vehicle to be removed and replaced. A control unit is positioned within the vehicle and the control unit is operationally coupled to each of the jacks. The control unit actuates one or both of the jacks between the extended position and the retracted position. A plurality of wheel chocks is provided for inhibiting the vehicle from rolling when the vehicle is lifted.