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:
Jul. 04, 1995
Filed:
Mar. 21, 1994
Peter Stieglitz, Bamberg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A process for manufacturing an electromagnetically actuated fuel-injection valve with a connecting ring of a non-magnetic material hermetically and permanently installed between an internal pole and a valve sleeve designed separately from the internal pole. The process reduces the cost of manufacturing fuel-injection valves by avoiding costly operations involved in the fabrication and assembly of the highly precise individual structural elements and in producing the hermetic and permanent connections. A one-piece magnet body is formed with an internal pole and an outer valve sleeve joined by a base. Above the base, the internal pole and the valve sleeve are radially separated by an axially running ring opening. A solder member and a non-magnetic intermediate ring are inserted into the ring opening, and the intermediate ring is then soldered to the magnet body. The base is then removed, thereby separating the internal pole and the valve sleeve.