Electrical pressure sensing switch
US6414254B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1999 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Oct 15, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J27/09
- WIPO fieldFurniture, games
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.