Title:
SLOWING MECHANISM AUTOMATICALLY FITTING SHAPE CHANGE OF TUBE FOR TELESCOPIC LADDER
Document Type and Number:
WIPO Patent Application WO/2019/019228
Kind Code:
A1
Abstract:
Disclosed is a slowing mechanism automatically fitting shape change of a tube for a telescopic ladder, the slowing mechanism comprising a sealed gas disc (3) provided near a lower end in a tube, wherein the sealed gas disc (3) is connected in a sealed manner with an inner wall of a ladder post tube, and an upper gas discharge small hole (10) is provided on a disc face of the sealed gas disc (3); an isolating support is provided under the sealed gas disc (3), the isolating support (2) is mounted at a lower end of the ladder post tube, and the isolating support (2) is provided with a lower gas discharge small hole (9); and a piston ring (4) is provided at a lower end of the isolating support (2), and the piston ring (4) is connected in a sealed manner with an inner wall of an adjacent tube below.
Inventors:
PAN YUEJIN (CN)
Application Number:
PCT/CN2017/097445
Publication Date:
January 31, 2019
Filing Date:
August 15, 2017
Export Citation:
Assignee:
PAN YUEJIN (CN)
International Classes:
E06C1/12
Domestic Patent References:
| WO2017088891A1 | 2017-06-01 |
Foreign References:
| CN106837155A | 2017-06-13 | |||
| CN201170058Y | 2008-12-24 | |||
| CN205638198U | 2016-10-12 | |||
| CN206111065U | 2017-04-19 | |||
| CN204782698U | 2015-11-18 | |||
| CN205859033U | 2017-01-04 |
Attorney, Agent or Firm:
HANGZHOU SIKERUI PATENT OFFICE CO., LTD. (CN)
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