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US 4,560,143 AGranted
Pressure cooker relief valve assembly
AssigneeThe Prestige Group Limited
InventorGeoffrey Robinson
Life of this patent
Estimating the term…
Abstract
A relief valve assembly for pressure cookers in which the valve port is controlled by a predetermined weight. A skirt portion forming part of the mass of the weight surrounds the valve port so forming a chamber. The skirt portion has an opening in it such that gas entering the chamber from the pressure cooker via the valve port can escape to the atmosphere in a predetemined direction, e.g. away from a hand grip portion.
Claims6
A pressure cooker relief valve assembly comprising:
- a valve port;
- a valve member;
- a valve seating;
- a weight assembly that urges the valve member and valve seating together to close the valve port;
- and means preventing rotation of the weight assembly by escaping gas;
- and in which the weight assembly includes:
- a first substantially annular wall surrounding the valve port and defining a first chamber into which gas from the valve port empties;
- a second substantially annular wall spaced from and concentric with said first wall and defining a second chamber, there being a passageway between said chamber through which gas moves from said first chamber to said second chamber;
- and an opening in said second wall through which gas escapes from said second chamber in a generally predetermined direction.
6 more elements
Dependencies are inferred from the claim text.