Measuring and testing – With fluid pressure – Leakage
Patent
1979-12-19
1981-03-03
Goldberg, Gerald
Measuring and testing
With fluid pressure
Leakage
12820123, G01M 320
Patent
active
042533287
ABSTRACT:
A device for enclosing a person's head which is fitted with a breathing mask for the purpose of testing the sealing of the mask to the wearer's face comprises a substantially cylindrical rigid helmet having a closed top adapted to overly the wearer's head and an open front portion adapted to be positioned in front of the wearer's face which is bounded by a front rim and side portions having bottom edges which have cut out curved portions forming supporting engagement edges conforming to the wearer's shoulders. A flexible apron has its periphery secured to the helmet rim around at least a portion of the opening and it carries drawstrings at its bottom edge which may be tightened around the body of the wearer so that the helmet with the apron seals over the person's head. In addition the helmet is provided with a connection having a valve for admitting gases into the interior of the helmet for testing purposes and the valve advantageously has a stem which is long enough to be engaged by the person's shoulder when the device is positioned on the wearer. Engagement of the valve on the shoulder causes opening of the valve.
REFERENCES:
patent: 4146025 (1979-03-01), Warncke et al.
Dragerwerk Aktiengesellschaft
Goldberg Gerald
Roskos Joseph W.
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