Pneumatic door closer

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10961759
APP PUB NO 20190338576A1
SERIAL NO

16511318

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A pneumatic door closer includes a rotary energy-storing mechanism including a housing and a driving mechanism. The driving mechanism includes a cylinder, a second piston assembly and a sealing element, the sealing element is in an air tight connection with the cylinder and the second piston assembly, to form a closed space filled with high pressure gas in the cylinder. The second piston assembly drives the closed space into a first air chamber and a second air chamber in communication with each other. The driving mechanism also includes a first piston assembly connected to the second piston assembly. The pneumatic door closer also includes a transmission mechanism having one end received in the housing and another end connected to the door frame.

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Patent Owner(s)

Patent OwnerAddress
CMECH (GUANGZHOU) LTDNO 388 FENGHUANG ROAD ZHONGXIN TOWN ZENGCHENG GUANGZHOU GUANGDONG 511365 GUANGZHOU CITY GUANGDONG PROVINCE 511365

International Classification(s)

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  • 2019 Application Filing Year
  • E05F Class
  • 705 Applications Filed
  • 507 Patents Issued To-Date
  • 71.92 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances20192020202120222023202420250255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wang, Fan Shui Guangdong, CN 4 20

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Patent Citation Ranking

  • 0 Citation Count
  • E05F Class
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  • 4 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges19811901 - 100102030405060708090100110120130140150160170180190200210

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