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Publication numberUS3005573 A
Publication typeGrant
Publication dateOct 24, 1961
Filing dateOct 8, 1959
Priority dateOct 8, 1959
Publication numberUS 3005573 A, US 3005573A, US-A-3005573, US3005573 A, US3005573A
InventorsDawson Victor C D, Seigel Arnold E
Original AssigneeDawson Victor C D, Seigel Arnold E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Blowout diaphragm
US 3005573 A
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Description  (OCR text may contain errors)

Oct 1961 v. c. D. DAWSON ETAL 3,005,573

BLOWOUT DIAPHRAGM Filed 001;. 8, 1959 F161. FICA.


INVENTORS United States Patent 0 3,005,573 BLOWOUT DIAPHRAGM Victor C. D. Dawson, Silver Spring, and Arnold E. Seigel,

Chevy Chase, Md, assignors to the United States of America as represented by the Secretary of the Navy Filed Oct. 8, 1959, Ser. No. 845,296 2 Claims. (Cl. 220-89) (Granted under Title 35, U.S. Code (1952), see. 266) The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

This invention relates to a valve of the rupturable diaphragm type which is designed to open under a predetermined pressure and which cannot be closed or reused.

In the study of aerodynamic forces at supersonic speeds, it is the practice to suspend models in a wind tunnel and pass air at very high velocity past the models, taking pictures at the instant the model is bufieted by the air or gaseous medium. One method of obtaining the velocity of gas desired is to explode a mixture of gases in a gun barrel and by means of a rupturable diaphragm type valve admit the explosive gases into the tunnel. In order to be sure the velocity of the gases are as desired, a valve which will change from completely closed to completely open instantly is needed. Also the parts of the valve must not set up currents in the onrushing air which would be different from that encountered by a missile in flight. The valve must be rugged to withstand the high velocity gases passing from the explosive chamber to the wind tunnel and must be designed with no parts which might tear loose so that no solid particles enter the wind tunnel with the onrushing gases.

An object of the present invention is to provide a valve of the rupturable diaphragm type which will open instantly from a completely closed position to a completely open position.

Another object of the present invention is to provide a valve of the rupturable diaphragm type which will completely open at a calculable pressure and remain completely closed until it is subjected to that calculated pressure or a higher pressure.

Still another object is the provision of a valve having a circular rim and formed with a central hemispherical rupturable diaphragm scored to open along certain predetermined lines, all of the scored sections being retained by the disc upon opening.

A further object of the invention is the provision of scored sections which vary in thickness along the score mark to insure retention of all the parts of the valve when the valve opens.

A still further object is the provision of a valve formed with a hemispherical diaphragm scored to be ruptured into spherical quadrants when subjected to a predetermined pressure, the thickness of the diaphragm at the lines of rupture being uniform, the thickness of the metal of the diaphragm varying from the center to the circumference to insure retention of all the parts after rupture.

Other objects and many of the attendant advantages of this invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawing wherein:

FIG. 1 is a perspective view of the valve closed;

FIG. 2 is a perspective view of the valve open;

FIG. 3 is a cross-sectional view along the score lines of a single quadrant; and

FIG. 4 is a plan view of a modification of the valve shown in FIG. 1.

Referring to the drawing wherein like parts are designated by like numerals throughout the several figures, the diaphragm valve shown on FIG. 1 is hemispherical in shape with a heavy flat integral rim 10. The inner wall of the rim continues from the base of the hemisphere in cylindrical form so that the blast enters the hemisphere along a tangential line. The valve is stamped or otherwise formed into the hemispherical shape from a flat disc and scored with sections of great circle lines which cross at right angles toeach other and divide the hemispherical I portion into four equal spherical quadrants 12.

When the diaphragm is ruptured the spherical quadrants must not be torn loose from the rim and must open fully so that no part of the quadrants is in the direct path of the blast. Should any part of the quadrants be in the path of the blast, disturbing air currents would be set up in the wind tunnel and the results of the test would not be accurate. The entire hemisphere is thicker adjacent the rim and decreases in thickness as it approaches the juncture 14 of the score lines 16. The thickness of the metal along the lines on which it is ruptured is the same at the rim as at the juncture of the score lines to make it possible to calculate the bursting pressure and to insure substantially instantaneous rupture, and this uniform thickness is shown at 18. The difference in thickness is clearly shown in the depth of the score lines, being deeper at 20 adjacent the rim than at 14-, the juncture of the score lines. This carefully designed rupturable diaphragm will assume the position shown in dashed outline in FIG. 3 when subjected to a pressure of approximately 60,000 psi, from any suitable source such as, for example, a gas gun. The valve is used between an explosion chamber and a wind tunnel. A mixture of gases under pressures approximately 8,000 psi are ignited and the resultant explosion ruptures the diaphragm as shown in FIG. 2, to permit the gas to enter the wind tunnel.

FIG. 4 illustrates a modified form of the hemispherical valve. The valve shown in this figure is pyramid shaped with a square rim 22. The triangular sides 30 of the pyramid are formed similar to the spherical quadrants 12, the metal varying in thickness from the base to the apex. The triangular shaped sides open similarly to the quadrants of FIG. 2. This type is generally used with lower pressures and smaller wind tunnels.

Obviously many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.

What is claimed as new and desired to be secured by Letters Patent of the United States is:

1. A rupturable diaphragm valve comprising a hemispherical body portion of a decreasing thickness and tapering uniformly from the base to the dome, said body portion being divided into segments by score lines of decreasing depth, said score lines decreasing in depth from the base to a common juncture at the dome, the body portion remaining along said score lines being of body portion, said wall being an extension of the inner 7 Wall of the hemispherical body portion at its base, said 5 rim being of a thickness greater than the hemispherical body portion at its greatest thickness.

2. A rupturable diaphragm valve according to claim 1 wherein the score lines divide the hemispherical body portion into quadrants.

UNITED STATES PATENTS Greengrass Sept. 14, 1897 Killen Oct. 4, 1938 Cofirnan Oct. 27, 1953 Paxton et al Sept. 13, 1960 FOREIGN PATENTS Great Britain May 15, 1957

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US589944 *Apr 3, 1897Sep 14, 1897 Safety
US2131809 *Jan 26, 1935Oct 4, 1938Killen Dan JValve
US2656950 *Aug 23, 1950Oct 27, 1953Black Sivalls & Bryson IncSafety pressure device
US2952383 *Sep 4, 1959Sep 13, 1960Pure Carbon Company IncCarbon rupture disk
GB774812A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3109553 *Jul 17, 1961Nov 5, 1963Fike Metal Prod CorpRupture disc unit
US3116747 *Jun 5, 1961Jan 7, 1964Torrington CoUnitary rupturable check valve
US3195769 *Aug 31, 1961Jul 20, 1965Miller Gerald ABurst diaphragm and method of making same
US3257026 *Jul 17, 1964Jun 21, 1966Glenn TaylorHigh pressure quick opening valve
US3272381 *Mar 25, 1964Sep 13, 1966Continental Can CoCan end for easy opening beverage cans
US3356257 *Sep 16, 1965Dec 5, 1967Midwest Consultants IncSafety plug for pressure vessels
US3363801 *Dec 20, 1965Jan 16, 1968Fike Metal Prod CorpRupture disc assembly
US3463351 *Feb 6, 1967Aug 26, 1969Black Sivalls & Bryson IncSafety pressure relief device
US3484817 *Nov 7, 1967Dec 16, 1969Black Swalls & Bryson IncSafety pressure relief device
US3834580 *Sep 25, 1972Sep 10, 1974Black Sivalls & Bryson IncSafety pressure relief device
US4498368 *Oct 6, 1983Feb 12, 1985The United States Of America As Representedby The Secretary Of The NavyFrangible fly through diaphragm for missile launch canister
US4597505 *Apr 9, 1984Jul 1, 1986Continental Disc CorporationRupture disc with selectively positioned initial buckling
US4669626 *Sep 20, 1983Jun 2, 1987Continental Disc CorporationRupture disc with selectively positioned initial buckling
US4745521 *Oct 29, 1986May 17, 1988Icotron S.A. Industria De Componentes ElectronicosExplosion proof safety valve for a condenser
US4759460 *Dec 22, 1986Jul 26, 1988Continental Disc CorporationRupture disc system
US4787180 *Jan 29, 1988Nov 29, 1988Bs&B Safety Systems, Inc.Vibration resistant rupturable pressure relief member
US4795051 *Apr 10, 1984Jan 3, 1989Rs&B Safety Systems, Inc.Rupturable fluid pressure relief apparatus and manufacturing method
US4838447 *Jun 29, 1987Jun 13, 1989Bs&B Safety Systems, Inc.Pressure relief device with conical reverse buckling disc
DE1261365B *May 2, 1964Feb 15, 1968Karl Erb Dipl IngFoliensicherheitsventil
EP0442199A2 *Nov 12, 1990Aug 21, 1991BS & B SAFETY SYSTEMS, INC.Low pressure non-fragmenting rupture disks
WO2012149612A1 *Apr 27, 2012Nov 8, 2012Dispack-Projects NvFixation of a fitting on a container
U.S. Classification220/89.2
International ClassificationG01M9/00, F16K17/02, F16K17/16, G01M9/04
Cooperative ClassificationG01M9/04, F16K17/162
European ClassificationG01M9/04, F16K17/16B