Title: Safety pressure relief apparatus

Abstract: The present invention relates to a safety pressure relief apparatus comprised of a reverse buckling rupture disk having a concave-convex portion connected to an annular flat flange portion by a curved transition connection and a support member having an annular flat flange portion for engaging the annular flat flange portion of the rupture disk and for supporting the transition connection thereof. The support member includes a cutting edge positioned interiorly of the transition connection and forming an opening in the support member so that when the concave-convex portion of the rupture disk reverses itself, the cutting edge severs the disk whereby a portion thereof passes through the opening in the support member. A bar for catching the severed portion of the disk after it passes through the opening in the support member is attached to the support member.

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Inventors: Witten, John E. (Tulsa, OK, US)
Wood, Loren E. (Tulsa, OK, US)
Short, III, Edward H. (Tulsa, OK, US)

Application Number: 963267
Filing Date: 1978-11-24
Publication_date: 1980-07-08
Assignee: B S & B Safety Systems, Inc. (Tulsa, OK)
Primary Class(es): 220/89.3 137/68.21, 137/68.26, 137/68.29
Other Classes:
US Patent Ref:

1157685	Oct, 1915	Fryer	220/89.
1930138	Oct, 1933	Van Derhoef	220/89.
2095828	Oct, 1937	Nerad	220/89.
2276830	Mar, 1942	Doran	220/89.
3213949	Oct, 1965	Kistler	137/68.
3464585	Sep, 1969	Summers	220/89.
3685686	Aug, 1972	Raidl	220/89.
3834580	Sep, 1974	Ludwig et al.	220/89.
3922767	Dec, 1975	Solter et al.	220/89.

Other Refs: 875337233387

Jul, 1971	CA
Dec, 1968	SU

Primary Examiner: Shoap, Allan N.
Assistant Examiner:
Attorney: Dougherty, Jr.; C. Clark