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. 20, 1990
Filed:
Nov. 16, 1988
Herbert Muller, Schwarzenfeld, DE;
Gerhardt Sehnke, Sulzbach-Rosenberg, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
The invention relates to a push-pull actuator for key switches with a mushroom knob (1) which is loaded by a restoring force and is supported longitudinally movable. This mushroom knob (1) is separated from the actuating plunger. This actuating plunger is spring-loaded in the switching direction and is locked in the operating position by rocker levers (13). The locking is cancelled by a relative motion between the mushroom knob (1) and the actuating plunger (6) by the sliding of inclined surfaces (23) at the edges of the rocker levers (13) so that the actuating plunger is moved into the off position by the spring (20). In the off position, the rocker levers (13) with the back sides (19) are brought into engagement with the end faces (18) of the rocker levers.