Title:
A PNEUMATIC PUSH BUTTON WITH AIR COMPENSATING STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2012/037858
Kind Code:
A1
Abstract:
Disclosed is a pneumatic push button with air compensating structure, comprising a plunger (1), an upper cover (2), a body (5), and a spring (4). The upper cover (2) is fixedly attached to the body (5). An air outlet is provided at the bottom of the body (5). The spring (4) is installed inside the chamber of the body (5). The pneumatic push button with an air compensating structure further comprises a seal (3). A guide hole (21) is provided on the upper cover (2). The plunger (1) is movably installed inside the guide hole (21), and the bottom of the plunger (1) extends into the chamber of the body (5). The spring is tensely arranged between the plunger (1) and the inner wall of the bottom of the body (5). A groove (11) is provided around the bottom of the plunger (1), and the seal (3) movably fits into the groove (11) so that the seal slides along the inner wall of the body (5) in a sealed manner with the up and down movement of the plunger (1) and mates with the inner wall of the groove (11) to form a sealed air path or an open air path. The pneumatic push button features a simple structure, swift air compensation and reliability.
Inventors:
LI FEIYU (CN)
CHI SHANGFEI (CN)
CHI SHANGFEI (CN)
Application Number:
PCT/CN2011/079651
Publication Date:
March 29, 2012
Filing Date:
September 15, 2011
Export Citation:
Assignee:
LI FEIYU (CN)
CHI SHANGFEI (CN)
CHI SHANGFEI (CN)
International Classes:
F16K7/10; E03D5/09
Domestic Patent References:
| WO2002046540A1 | 2002-06-13 |
Foreign References:
| CN201809839U | 2011-04-27 | |||
| CN201214817Y | 2009-04-01 | |||
| CN201214818Y | 2009-04-01 | |||
| CN201214811Y | 2009-04-01 | |||
| CN2673963Y | 2005-01-26 | |||
| DE19633178A1 | 1998-02-19 |
Other References:
See also references of EP 2620560A4
None
None
Attorney, Agent or Firm:
SHOUCHUANG JUNHE PATENT AGENT CO., LTD. XIAMEN (CN)
厦门市首创君合专利事务所有限公司 (CN)
厦门市首创君合专利事务所有限公司 (CN)
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Claims:
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