---
publication_id: "OT-2026-000003093"
title: "Hydraulic jack"
published_at: "2026-09-15T19:27:31.054057Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000003093"
categories:
  - "lifting-positioning-manipulation/lift-tables-and-positioners"
keywords:
  - "b66f5/04"
  - "b66f5/04"
  - "f15b7/04"
  - "f15b7/04"
---

# Hydraulic jack

## Abstract

A hydraulic jack includes a moveable base seat. A lift arm, a handle and a hydraulic driver each mounted on the base seat. The hydraulic driver is driven by the handle to push the lift arm to lift an object. The hydraulic jack has a compound piston assembly and a hydraulic driver with fluid paths by which the jack can adjust the lift capacity so as to lift quickly and lower slowly.

## 1. Drawings

[0001] Sheet 1.

[0002] Sheet 2.

[0003] Sheet 3.

[0004] Sheet 4.

[0005] Sheet 5.

[0006] Sheet 6.

[0007] Sheet 7.

[0008] Sheet 8.

[0009] Sheet 9.

[0010] Sheet 10.