Title:
AUTOMATIC SWITCHABLE EXHALE CARTRIDGE
Document Type and Number:
WIPO Patent Application WO/2014/140603
Kind Code:
A3
Abstract:
An exhale valve assembly includes a housing, a valve carrier body, a primary valve assembly, a plunger, a lock assembly, and an air pressure activated actuator assembly. The valve carrier body is disposed the housing and has a passageway. The primary valve assembly is mounted to the valve carrier body. A first air flow path passes through the passageway and a second air flow path passes through the primary valve assembly. The plunger, is configured to permit a flow through the first air flow path when the plunger is in a first position and to direct a flow through the second air flow path when the plunger is in a second position. The lock assembly is configured to secure the plunger in the first position. The air pressure activated actuator assembly is configured to release the lock responsive to a pressure change within the cavity of the housing.
Inventors:
LANGFORD GRAHAM (GB)
TOOGOOD NOEL (GB)
TOOGOOD NOEL (GB)
Application Number:
PCT/GB2014/050777
Publication Date:
November 13, 2014
Filing Date:
March 14, 2014
Export Citation:
Assignee:
SCOTT HEALTH & SAFETY LTD (GB)
International Classes:
A62B18/10; A62B7/02; A62B9/02
Domestic Patent References:
| WO2010131031A2 | 2010-11-18 |
Foreign References:
| US20080257352A1 | 2008-10-23 | |||
| US2985169A | 1961-05-23 | |||
| US2406888A | 1946-09-03 | |||
| US20100236554A1 | 2010-09-23 |
Attorney, Agent or Firm:
HEDGES, Martin Nicholas (10 Old Bailey, London EC4M 7NG, GB)
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