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. 02, 2002
Filed:
Oct. 15, 1999
John Duncan McNair, Hong Kong, HK;
Chiaphua Industries Limited, Hong Kong, US;
Abstract
An electrical pressure sensing switch for a pressure cooker comprises a plunger slidably and sealingly mounted in a lid of a cooking vessel. The plunger is moved towards one end of a pivoted lever when pressure rises inside the vessel. The other end of the lever is positioned to press down against an operating arm. When the force applied by the plunger as a result of higher pressures in the vessel is sufficient to overcome bias of a spring, the arm is moved down by the lever. This results in operation of micro-switches. Embodiments of the invention are mechanically simple and accommodate wide tolerances without loss of calibration, while necessary electrical parts are separated or separable from the lid to facilitate cleaning and washing.