The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 1993
Filed:
May. 28, 1991
Applicant:
Inventor:
Leonard Jackson, Newcastle Upon Tyne, GB;
Assignee:
Northern Engineering Industries PLC, Newcastle Upon Tyne, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65D / ;
U.S. Cl.
CPC ...
220207 ; 220 892 ; 220203 ; 220208 ; 220328 ; 220346 ; 220366 ; 220745 ; 174 / ; 411-9 ; 411 34 ; 403-2 ; 403337 ; 4034081 ;
Abstract
A fastening which allows a bolted-on cap to part from a body when excessive pressures develop in a cavity in the body, comprises a nut and bolt arrangement, and includes a weakened tubular spacer surrounding each bolt, between the bolt head and the cap. The wall of the spacer is drilled or scored in its mid-length area. The material and proportions of the spacer, and the proportions of the score or drilling, are so matched in relation to a particular pressure environment, that on excessive pressure developing, the load exerted on the cap causes the spacer to collapse in controlled manner, rather than merely crushing or breaking.