Locking mechanism for a pressure cooker
US4840287A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1988 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Apr 29, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/0864
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A simple to operate locking mechanism for a pressure cooker, the locking mechanism having a locking arm rotatable from a fully open to a fully locked position, the locking arm being operatively connected to a cam shaft assembly which is rotatable with the locking arm, the cam shaft assembly being slidably axially in a cam shaft sleeve rotatably mounted in a displacement member which causes the cam shaft assembly to be axially displaced as it is rotated by the locking arm, the cam shaft assembly being moveable from a retracted to an extended position as the locking arm moves from a fully open to an intermediate position. A safety mechanism is provided to prevent rotation of the locking arm from the intermediate to the fully locked position in the event the cam shaft assembly is not fully extended. A pressure responsive safety mechanism is also provided to prevent opening movement of the locking mechanism in the event the cooker is under pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.