IT1066779B - Respirator pressure demand exhalation valve - has seal spring biased against valve stem disc and side exhaust slots - Google Patents

Respirator pressure demand exhalation valve - has seal spring biased against valve stem disc and side exhaust slots

Info

Publication number
IT1066779B
IT1066779B IT5252976A IT5252976A IT1066779B IT 1066779 B IT1066779 B IT 1066779B IT 5252976 A IT5252976 A IT 5252976A IT 5252976 A IT5252976 A IT 5252976A IT 1066779 B IT1066779 B IT 1066779B
Authority
IT
Italy
Prior art keywords
chamber
valve
disc
spring biased
biased against
Prior art date
Application number
IT5252976A
Other languages
Italian (it)
Original Assignee
Mine Safety Appliances Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mine Safety Appliances Co filed Critical Mine Safety Appliances Co
Application granted granted Critical
Publication of IT1066779B publication Critical patent/IT1066779B/en

Links

Landscapes

  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

The chamber in the valve case has an inlet port of exhaled air in one of its end walls. Spaced inwardly from the side wall of the chamber is a valve seat surrounding the inlet port and engaged by one side of a seal. The opposite side of the seal is engaged by a rigid disc secured to a valve stem that extends through the port and into a guide for the stem. A spring in the case is compressed between the disc and the other end wall of the valve chamber for pressing the seal against the seat. The disc is spaced from the ported wall of the chamber. The side wall of the chamber is provided with exhaust slots extending around the disc with inner walls adjacent the ported wall. The space between the valve seat and the side wall of the case is always open to the slots.
IT5252976A 1976-01-14 1976-12-09 Respirator pressure demand exhalation valve - has seal spring biased against valve stem disc and side exhaust slots IT1066779B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64991576A 1976-01-14 1976-01-14

Publications (1)

Publication Number Publication Date
IT1066779B true IT1066779B (en) 1985-03-12

Family

ID=24606759

Family Applications (1)

Application Number Title Priority Date Filing Date
IT5252976A IT1066779B (en) 1976-01-14 1976-12-09 Respirator pressure demand exhalation valve - has seal spring biased against valve stem disc and side exhaust slots

Country Status (1)

Country Link
IT (1) IT1066779B (en)

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19941214