Invention Grant
- Patent Title: Combination hydraulic and pneumatic door closer
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Application No.: US15335002Application Date: 2016-10-26
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Publication No.: US09920561B2Publication Date: 2018-03-20
- Inventor: Shuiwang Fan
- Applicant: Cmech (Guangzhou) Ltd.
- Applicant Address: CN Guangdong
- Assignee: Cmech (Guangzhou) Ltd.
- Current Assignee: Cmech (Guangzhou) Ltd.
- Current Assignee Address: CN Guangdong
- Agency: McKee, Voorhees & Sease, PLC
- Priority: CN201510318849 20150611
- Main IPC: E05F1/10
- IPC: E05F1/10 ; E05F3/00 ; E05F3/02 ; E05F3/10 ; E05F5/08 ; E05F3/22

Abstract:
A door closer capable of adjusting door closing speed, includes a pneumatic cylinder on the door frame, a hydraulic cylinder on the door, and a lever. One end of the lever is movably connected to the pneumatic cylinder, and the other end is connected to the hydraulic cylinder. The pneumatic cylinder includes a sliding rail, and a sliding member cooperated with the sliding rail. A hermetic chamber is formed by the sliding member and the sliding rail. An adjusting valve, for adjusting the air exhaust of the hermetic chamber, is provided on a wall of the hermetic chamber.
Public/Granted literature
- US20170081892A1 COMBINATION HYDRAULIC AND PNEUMATIC DOOR CLOSER Public/Granted day:2017-03-23
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