Shinn Fu Corporation

Ming Chuan Yueh

A swiveling handle mounting mechanism mounted on the pump of the hydraulic unit of a hydraulic garage jack is disclosed to include a seat affixed with a pressure plate to the pump beyond the oil return valve of the hydraulic unit, a swiveling holder horizontally rotatably coupled to the seat beneath the pressure plate, a handle sleeve vertically pivotally connected to the swiveling holder and holding an operating handle for driving the pump to pump out the hydraulic fluid for lifting the load, a locking mechanism installed in the swiveling holder at one side for locking the handle sleeve to the swiveling holder, and a pedal pivoted to the swiveling holder for operation by the user to open a release valve for allowing return of the hydraulic fluid.

Swiveling handle mounting mechanism of a hydraulic garage jack

The load dependent, variable displacement, at least three-shift hydraulic mechanism includes a hydraulic device disposed at the front side of a valve block and adapted to move a ram piston oriented such as to raise weight, the hydraulic device defining an oil accumulation chamber, a rapid-lifting oil chamber for rapid extension of the ram piston under no-load conditions, and a high-pressure oil chamber for lifting the ram piston oriented to raise weights, a pump piston apparatus disposed at the back side of the valve block and defining a front working chamber and a rear oil accumulation chamber, and oil passages so arranged that hydraulic oil can be supplied from the oil accumulation chamber and the rear oil accumulation chamber to the front working chamber and then to the rapid-lifting oil chamber or the high-pressure oil chamber to extend the ram piston.

Growing community of inventors

Chia-I Hsien, Taiwan

Ming Chuan Yueh