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:
May. 21, 1991
Filed:
May. 22, 1989
Wolfgang Mehnert, Lindau-Reutin, DE;
IFM Electronic GmbH, Essen, DE;
Abstract
A housing for electronic switchgear comprises an outer sleeve made of metal, an inner sleeve positioned within the outer sleeve and being made of electrically insulating plastic that is impermeable to water, dust and other media in the ambient atmosphere, and a stopper of similar plastic. The inner sleeve is closed at one end and the stopper is inserted into the sleeve at its other end to sealingly close the sleeve. The inner sleeve consists of a first sleeve part open at both ends and a second sleeve part aligned with the first sleeve part and closed at one end. The other end of the second sleeve part is abutting upon one end of the first sleeve part. The stopper is sealingly inserted into the first sleeve part at its other end. The plastic of the first sleeve part is transparent or translucent whereas the plastic of said second sleeve part is not transparent or translucent, but otherwise identical or of equal grade. Both sleeve parts are bonded together with their abutting ends in a hermetically sealed and puncture-proof manner, in particular, by ultrasonic plastics welding. Preferably the first sleeve part is an extruded part, whereas the second sleeve part is an injection molded part.