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. 15, 2000
Filed:
Jun. 11, 1998
Alois Schaeffeler, Spaichingen, DE;
Jens Mueller, Tuttlingen, DE;
Marquardt GmbH, Rietheim-Weilheim, DE;
Abstract
An electric switch (1), in particular for electric hand tools having an electric motor operated by means of direct current. The switch (1) possesses a contact system (9) consisting of a fixed contact (10) and of a switching contact (11), an actuating member (3) for triggering a switching operation between an 'off' and an 'on' position of the contact system (9) acting on the switching contact (11). The contact system (9) is assigned means (18), consisting of a shield (19), for extinguishing an arc generated between the fixed contact (10) and the switching contact (11) during the switching operation. The shield (19) can be moved together with the switching contact (11) in a coupled manner, during the operation to switch the switching contact (11) from the 'on' to the 'off' position the shield (19) being moved into the region located between the fixed and switching contacts (10, 11). Conversely, during the operation to switch the switching contact (11) from the 'off' to the 'on' position, the shield (19) is moved out of the region located between the fixed and switching contacts (10, 11), so that the switching contact (11) can be laid onto the fixed contact (10).