Robert P Haytko

US Patent:

53998073, Mar 21, 1995

Filed:

Dec 22, 1993

Appl. No.:

8/171441

Inventors:

Garrett S. Yarbrough - Chicago IL
John E. Cower - Manlius NY
Kevin L. Browngardt - Syracuse NY
Susan M. Orzell - DeRuyter NY
Robert P. Haytko - Cicero NY
William G. Wright - Liverpool NY
Nelson L. Lansing - Bridgeport NY

Assignee:

Cooper Industries, Inc. - Houston TX

International Classification:

H02G 306

US Classification:

174 65R

Abstract:

An explosion-proof electrical apparatus comprises two enclosures containing electrical devices. The enclosures are physically interconnected by a one-piece or two-piece hollow sleeve member which is screwed into threaded holes of the enclosures. A fitting assembly mounted in the sleeve member comprises a hollow feedthrough bushing screwed into the sleeve member, a hollow feedthrough seal member screwed into the feedthrough bushing, and a plurality of conductors extending through the feedthrough seal member and electrically connected to the electrical devices. The conductors are embedded in sealing compound which occupies the feedthrough seal member. During assembly of the fitting assembly, the feedthrough seal member is positioned within the sleeve, and the feedthrough bushing is screwed along the feedthrough seal member and is simultaneously screwed into the sleeve.