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This is a record of a document published elsewhere, first published by the European Patent Office, as EP-4707216-A2, on 11 March 2026. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000002027

Oil circuit system, lifting device, electric jack, press, crane, and tire mounting/dismounting and transport apparatus

Published
Permanent URL
Classification
Lifting, Positioning & Manipulation › Lift Tables and Positioners
Inventors
LIU YONGQIANG, LI ZHENHAO, XU MANQU, ZHENG HAIFA
Assignee
SNIT HYDRAULIC CO LTD
Original source
EP-4707216-A2, the European Patent Office, 11 March 2026
Document SHA-256
63bf63a0929fe44efdbd221a5ca256e1a0be52a731b57eb391be15730bae2b93

Abstract

An oil circuit system applicable for a lifting device comprising: a lifting oil cylinder (110), a tank (800), a first oil feed line (252), a second oil feed line (253), an oil inlet/outlet line (254), a pressure relief line (255), an oil return line (256), a first valve, and a second valve; wherein the first valve is connected with the first oil feed line (252), the pressure relief line (255), and the oil return line (256); the second valve is connected with the first oil feed line (252) and the oil return line (256); the oil inlet/outlet line (254) has one end connected with the first oil feed line (252) and the second oil feed line (253), and another end connected with the lifting oil cylinder (110); in a first operating condition of the lifting oil cylinder (110), both the first oil feed line (252) and the second oil feed line (253) supply hydraulic oil to the lifting oil cylinder (110); in a second operating condition of the lifting oil cylinder (110), the second oil feed line (253) supplies the hydraulic oil to the lifting oil cylinder (110), the hydraulic oil within the first oil feed line (252) flows to the oil return line (256) via the second valve and returns to the tank (800); and an oil pressure within the lifting oil cylinder (110) in the second operating condition is greater than an oil pressure within the lifting oil cylinder (110) in the first operating condition.

Publication information

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Citation

OpenTechnical Publication OT-2026-000002027, “Oil circuit system, lifting device, electric jack, press, crane, and tire mounting/dismounting and transport apparatus,” published September 15, 2026 at 19:10:17 UTC, https://opentechnical.org/p/OT-2026-000002027.

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