Patent ID: 9150393
Filing Date: 2015-10-06
Classification: B66F

Abstract:
1. A thin jack, comprising: a body having: a piston support post movably received in the receiving chamber and having a sidewall in fluidtight sliding contact with the limiting piston; a dividing piston disposed at a top portion of the piston support post, being in fluidtight sliding contact with a sidewall of the receiving chamber, and corresponding in position to the limiting piston to confine the dividing piston to the receiving chamber; and a supporting annular unit with an internal thread structure disposed on an inner wall of the supporting annular unit, and the body further has an external thread structure disposed on an outer surface of a sidewall of the body, the external thread structure corresponding in position to the internal thread structure, such that the body can be fixed in place by the supporting annular unit, wherein the dividing piston divides the receiving chamber into an upper receiving space and a lower receiving space, the upper receiving space being in communication with the upper passage, and the lower receiving space being in communication with the lower passage; wherein an outward opening of the upper passage of the body is positioned above the external thread structure, and an outward opening of the lower passage of the body is positioned above the external thread structure.