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:
Feb. 17, 1987
Filed:
Apr. 01, 1985
Doduco KG Dr. Eugen Durrwachter, Pforzheim, DE;
Abstract
The power circuit breaker particularly for use in medium-voltage switchgear comprises contacting parts consisting of a contact pin, which is displaceable in the direction of its longitudinal axis, and a contact socket, which is coaxial to said pin and comprises a forward portion adapted to contact the pin. That forward portion of the socket is formed with axial slots dividing that forward portion into axial segments. Each of said segments comprises at its tip a covex portion, which protrudes radially inwardly and resiliently bears on the pin when the breaker is closed. In such breaker the pin has a forward portion, which comprises a tip and which has a length that is smaller than the largest depth to which the pin can be inserted into the socket. That forward portion consists of a composite material, which contains a metal having a high electrical conductivity and a material which releases quenching gases under the action of an electric arc. At least when the breaker is closed the pin and the socket are preferably surrounded by a sleeve for directing the flow of the quenching gases.