Measuring and testing – With fluid pressure – Leakage
Patent
1989-06-26
1990-04-10
Raevis, Robert R.
Measuring and testing
With fluid pressure
Leakage
G01M 304
Patent
active
049149571
ABSTRACT:
Leak test adaptor apparatus for facilitating leak testing face mask respirators including an outer member having a bore therethrough, the bore having a first end and a second end; an inner member disposed in the bore of the outer member, the inner member having a channel therethrough defining a flow path for passage of the gas through the channel from the first end to the second end of the bore; a pressure responsive valve connected to the inner member for regulating the flow of the gas through the channel; and a gas sampling port in communication with the bore for sampling the gas in the bore. The pressure responsive valve closes the channel when the gas pressure near the second end of the bore is greater than the gas pressure near in the channel and opens the channel when the gas pressure nearer the second end of the bore is less than the gas pressure in the channel. The pressure-responsive valve, which is disposed in the flow path of the gas, includes a valve seat connected to the inner member, a valve shaft connected to the valve seat, and a substantially thin disk-shaped gate member slidable connected to the valve shaft, which gate member is capable of closing and opening the channel by sliding along the valve shaft when acted upon by the difference in gas pressure between the channel and the second end of the bore.
REFERENCES:
patent: 1789262 (1931-01-01), Monro et al.
patent: 2420372 (1947-05-01), Heidbrink
patent: 2449053 (1948-09-01), Burns et al.
patent: 2738669 (1956-03-01), Silverman et al.
patent: 2744524 (1956-05-01), Whipple
patent: 3486366 (1969-12-01), Jackson
patent: 3580051 (1971-05-01), Blevins
patent: 4146025 (1979-03-01), Warncke et al.
patent: 4253328 (1981-03-01), Pasternack
patent: 4453544 (1984-06-01), Silverthorn
patent: 4456014 (1984-06-01), Buck et al.
patent: 4543112 (1985-09-01), Ackley et al.
patent: 4846166 (1989-07-01), Willeke
Exhibit 1: Photocopy of advertisement disclosing a QUANTAFIT workstation fit test instrument marketed by Dynatech Frontier Corporation. Title and date of publication containing the advertisement are unknown to applicant.
Exhibit 2: Photocopy of two pages (i.e., cover page and p. 4) from Industrial Hygiene News, Mar. 1986, vol. 9, No. 2.
Exibit 3: Photocopy of two pages (i.e., cover page and p. 26) from Occupational Health & Safety, Aug. 1982.
Exhibit 4: Photocopy of two pages (i.e., cover page and another page) from Occupational Health & Safety, Jul. 1981.
Raevis Robert R.
Stevens Walter S.
Westinghouse Electric Corp.
LandOfFree
Leak test adaptor apparatus for facilitating leak testing face m does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Leak test adaptor apparatus for facilitating leak testing face m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Leak test adaptor apparatus for facilitating leak testing face m will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2291858