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:
May. 26, 1992
Filed:
Jul. 15, 1991
Shinji Yanai, Furukawa, JP;
Yujiro Shimoyama, Furukawa, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A switch device which is operated by movement of a knob coupled to a switch actuator. The knob comprises a projection from a center of an arc-like skirt, wherein the arc-like skirt has a rounded slope extending from the projection to a periphery of the arc-like skirt. A cover arranged over a switch element mounted on a printed substrate defines an opening and has projection walls formed at peripheral edges of the opening, wherein the opening acts to receive the switch actuator, and wherein the arc-like skirt co-acts with the projection walls for preventing water from entering the opening. Liquid contacting the knob flows down the arc-like skirt and is drained through a drain passage formed in the cover. Thus, the switch device is essentially made waterproof by the co-action of the arc-like skirt, the projection walls, and the drain passage.