Patent ID: 11952248
Assignee: WALTON.K.K INTERNATIONAL BUSINESS GROUP, INC.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 9:
10. A hydraulic jack, comprising:
a hydraulic cylinder storing hydraulic fluid inside;
a piston installed in the hydraulic cylinder that is raised up from the hydraulic cylinder by a pressure of the hydraulic fluid stored in the hydraulic cylinder, wherein the piston is used to lift up a heavyweight, and wherein the piston has a through hole on a body thereof, the through hole has a determined diameter and is perpendicular to the piston;
a safety pin for inserting into the through hole when the piston is raised up to secure the piston in place; and
a bracket mounted on a top of an exterior wall of the hydraulic cylinder, wherein the bracket is mounted on the top of the exterior wall of the hydraulic cylinder by a fastening device, and comprises two parallel supporting plates surrounding the piston, each of which has a through hole, and wherein when in use, the through holes of the supporting plates are aligned with the through hole of the piston after the piston is raised up, and wherein the safety pin penetrates the through holes of the bracket and the through hole of the piston for securing the piston in place.