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:
Oct. 29, 1991
Filed:
Aug. 28, 1990
Applicant:
Inventor:
Graham A Reynolds, Coventry, GB;
Assignee:
Rolls-Royce Business Ventures Limited, Derby, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F41B / ;
U.S. Cl.
CPC ...
89-8 ; 89 141 ; 124-3 ;
Abstract
A rail gun (10) comprising two spaced apart elongate co-extensive rail electrodes (11,12) having confronting surfaces which are of toothed cross-section configuration. Alternate tooth flanks (21) have the outlets of a plurality of nozzles (24) located therein. The nozzles (24) direct helium into the gap (14) between the rail electrodes (11,12). The helium provides electrode (11,12) cooling as well as providing less resistance to armature (15) acceleration than would be the case with air.