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:
Jun. 07, 1983
Filed:
Dec. 22, 1980
Richard Hirschmann, Radiotechnisches Werk, Esslingen, DE;
Abstract
A cable underpinning usable, for example in spark-plug assemblies, comprises a pipe stub connected to a spark-plug housing and a deformable sleeve provided with a plurality of longitudinal slits or apertures. The pipe stub has a first inner cylindrical surface connected by means of a frusto-conical surface to a second inner cylindrical surface which is smaller in diameter than the surface of the sleeve when the same is in an unstressed or uncompressed state, the second cylindrical surface being provided with a plurality of sharp-edged recesses. Upon the passing of the cable through the sleeve and the force-fit insertion of the sleeve into the pipe stub, bulges are formed in the sleeve which protrude into the recesses, thereby preventing rotary and axial motion of the sleeve relative to the pipe stub. The flexible outer layer of the cable also bulges into the slits, which bulging locks the cable to the sleeve. The sleeve is provided on an inner surface with annular projections which bite into the cable sheath upon the force-fit insertion of the sleeve and cable into the pipe stub.