Abstract: A puller device has a body including a pulling assembly, a support set and a brace assembly pivotally coupled above the support set. The pulling assembly includes a cylinder affixed at one acting end thereof and hooks connected onto the cylinder. The pulling assembly is secured onto a movable bracket having a bulge extended downwardly therefrom. The hooks may be driven to expandably and retractably pull mechanical components out by a hydraulic control valve assembly. The support set may expand upwardly and retract downwardly for supporting the body to vertically move. The top of the support set is axially connected with the brace assembly, so as to support the combined movable bracket and pulling assembly as a whole. A micro-adjusting means is disposed onto the brace assembly for adjusting the lateral position of the body, and another micro-adjusting means is also mounted onto the brace assembly for vertically adjusting the tilted angle of the body.

Abstract: A treading exerciser has a base frame, a first treadle plate, a second treadle plate, a hydraulic pressure control device, a first power control device, and a second power control device. The base frame has a front support frame, a rear support frame, and a connection panel. A first sleeve is disposed on an end of the first treadle plate. A first pivot shaft is inserted through the first sleeve. A second sleeve is disposed on an end of the second treadle plate. A second pivot shaft is inserted through the second sleeve. The hydraulic pressure control device is disposed on the connection panel. The first power control device is connected to the hydraulic pressure control device and the first treadle plate. The second power control device is connected to the hydraulic pressure control device and the second treadle plate. An adjustment shaft is inserted through the hydraulic pressure control device.

Abstract: An oil pressure device is disposed on a hoist frame. The hoist frame has an upper panel and a middle panel. An oil cylinder is disposed on the upper panel. The oil pressure device has a pneumatic pump having a lower cover and a pneumatic cylinder, a base seat disposed on the pneumatic cylinder, the lower cover disposed on a bottom of the pneumatic cylinder, an oil tank disposed on the base seat, and an oil pump connected to the base seat. A handle is connected to the oil pump. A connector is connected to the lower cover. An air pipe is connected to the connector. An air pressure valve is connected to the air pipe.

Abstract: A lift device has a generally A-shaped base frame, a leg frame connected to the generally A-shaped base frame, a support post disposed on the leg frame, and a cantilever frame disposed on the support post. The cantilever frame has a pair of parallel upper links and a pair of parallel lower links. A jack is disposed on the generally A-shaped base frame and disposed between the parallel lower links. An L-shaped outer frame is disposed between the parallel upper links and disposed between the parallel lower links. An inner frame is inserted in the L-shaped outer frame. A collar encloses the L-shaped outer frame. An end hook is disposed on an end of the inner frame.

Abstract: An oil pressure device is disposed on a hoist frame. The hoist frame has an upper panel and a middle panel. An oil cylinder is disposed on the upper panel. The oil pressure device has a pneumatic pump having a lower cover and a pneumatic cylinder, a base seat disposed on the pneumatic cylinder, the lower cover disposed on a bottom of the pneumatic cylinder, an oil tank disposed on the base seat, and an oil pump connected to the base seat. A handle is connected to the oil pump. A connector is connected to the lower cover. An air pipe is connected to the connector. An air pressure valve is connected to the air pipe.

Abstract: A jack has a first oil cylinder, an inner cylinder disposed in the first oil cylinder, an upper cover covering the first oil cylinder and the inner cylinder, a piston and a piston rod inserted in the inner cylinder, the piston connected to the piston rod, the piston rod passing through the upper cover, an extended plate extending from the upper cover, a collar disposed on a bottom of the extended plate, a second oil cylinder inserted through the collar, the second oil cylinder having a lower enlarged neck, a push rod inserted through the second oil cylinder, an arm plate connected to the collar, a retainer connected to the push rod, a lever fastening a connector and the retainer together, and a handle rod connected to the connector. The connector has a slot for receiving the arm plate. A pivot pin fastens the connector and the are plate together.

Abstract: A jack device has a tripod, a pneumatic pressure device disposed on the tripod, an oil pressure device connected to the pneumatic pressure device, and a working table disposed on the oil pressure device. A handle controls the oil pressure device. A first pedal and a second pedal control the pneumatic pressure device.

Abstract: The present invention is a multiple pump transmission jack for use with removing and repairing transmissions. The jack has two hydraulic pumps mounted on a base which are connected with interrelated oil passages or conduits formed within the base, which is operated by a pedal connected with the two pumps for drawing hydraulic oil from a reservoir and into an oil pressure cylinder to easily and quickly raise a piston rod within the oil pressure cylinder saving the operator's effort and increasing the efficiency of operation. The jack also includes an overload system that prevents the operator from placing a load on the jack which is greater than its rated load, thus preventing danger.