OPENTECHNICAL PUBLICATION
OT-2026-000000637

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

Published: 2026-09-15T19:03:11.490298Z
Permanent URL: https://opentechnical.org/p/OT-2026-000000637
Categories: Lifting, Positioning & Manipulation > Lift Tables and Positioners

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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.

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OpenTechnical publication OT-2026-000000637
Published 2026-09-15T19:03:11.490298Z
https://opentechnical.org/p/OT-2026-000000637