Title of Invention

A DEAD WEIGHT VALUE FOR A PRESSURE COOKER

Abstract

A dead weight valve for a presure cooker comprises a hollow stem disposed over the lid of the cooker,the first end of the stem opening out on the under side of the lid of the cooker. A cop is disposed over the lid surrounding a portion of the stem. A dead weight body incorporates a passage and is accommodation in the cup with the stem receivable in the passage, the second end of the stem, with passage being normally closed by a conical pin fixed to the underside of the cowl of the body at the end of the passage. A lateral orifice open to atmosphere is located on the body, a spring-loaded button is located on the internal periphery of the passage engaging with a ridge on the exterior of the atom to limit the to and fro movement of the body. A key on the body engages with a slot on the cup to prevent rotational movement of the body.

Full Text

This invention relates to a dead weight valve for a pressure cooker. A dead weight valve for a pressure cooker releases steam whenever there is excessive steam build-up within the bowl of the cooker. In conventional dead weight valves the steam is let out in all directions around the weight valve, as a result of which there is every likelihood of the user being scalded by the hot escaping steam. On the other hand in the dead weight valve proposed herein the exit of steam is in a defined direction, away from the point where the user is usually stationed, that is, in a direction opposite to the handle of the cooker. Various other features of this invention will be apparent from the following further description thereof given hereunder. The dead weight valve for a pressure cooker, according to this invention, comprises a hollow stem disposed over the lid of the cooker, the first end of the stem opening out on the underside of the lid of the cooker; a cup disposed over the lid, surrounding a portion of the stem; a dead weight body, incorporating a passage, and accommodable in the cup, with the stem receivable in the passage, the second end of the stem, within the passage, being normally closed by a conical pin fixed to the underside of the cowl of the body at the end of the passage; a lateral orifice, open to atmosphere, located on the body; spring-loaded buttons located on the internal periphery of the passage engaging with a ridge on the exterior of the stem to limit the to and fro movement of the body; a key on the body engaging with a slot on the cup to prevent rotational movement of the body, the arrangement being such that when steam pressure, above a given value, builds up within the bowl of the cooker, the steam lifts the body, to open the second end of the stem, thus allowing steam to escape through the stem and the orifice to atmosphere, while the key and slot prevent rotational movement of the body, to maintain the exit of steam at.the orifice substantially unidirectional. This invention will now be described in greater detail with reference to the accompanying drawings which illustrate, by way of example, and not by way of limitation, one of various possible embodiments of the weight valve proposed herein, Fig.l illustrating the assembly of the embodiment Fig.2 illustrating the weight body in section and Fig.3 illustrating the slot and key. A hollow stem S is disposed over the lid L of the pressure cooker. The first end of the stem A opens out on the underside of the lid L of the cooker. A cup C is mounted over the lid and surrounds a portion of the stem S. The cup C is preferably made of a hard plastic, to serve as a heat insulator for user safety. The cup is preferably mounted in a cavity in the top handle of the pressure cooker. The dead weight body V incorporates a passage P. The body V is accommodable in the cup C, with the stem S receivable in the said passage. The second end B of the stem, thus received in the passage P, is normally closed by a conical pin M which enters the second end of the stem B and seals it, preventing escape of steam. The pin M is fixed to the underside of a cowl G of the body V. on the eKterior of the stem S to limit the to and fro movement of the body V within the cup C, so that steam pressure lifting the body V does not lift it off completely. A key K provided on the body V engages with a slot N provided on the cup C to prevent rotational movement of the body with respect to the cup. The arrangement is such that when steam pressure, above a given value, builds up within the bowl of the cooker, the steam lifts the body V allowing steam to escape through the second end of the stem B and orifice 0 to atmosphere, while the key K and slot N limit rotational movement of the body V, to maintain the exit of the steam at the orifice 0 substantially unidirectional. The terms and expressions in this specification are of description and not of limitation, since such terms and expressions do not exclude any equivalents thereof, but various other embodiments of this invention are possible without departing from its scope and ambit. We Claim: 1. A dead weight valve for a pressure cooker comprises a hollow stem disposed over the lid of the cooker, the first end of the stem opening out on the underside of the lid of the cooker; a cup disposed over the lid, surrounding a portion of the stem; a dead weight body, incorporating a passage, and accommodable in the cup, with the stem receivable in the passage, the second end of the stem, within the passage, being normally closed by a conical pin fixed to the underside of the cowl of the body at the end of the passage; a lateral orifice, open to atmosphere, located on the body; spring-loaded buttons located on the internal periphery of the passage engaging with a ridge on the exterior of the stem to limit the to and fro movement of the body; a key on the body engaging with a slot on the cup to prevent rotational movement of the body, the arrangement being such that when steam pressure, above a given value, builds up within the bowl of the cooker, the steam lifts the body, to open the second end of the stem, thus allowing steam to escape through the stem and the orifice to atmosphere, while the key and slot prevent rotational movement of the body, to maintain the exit of steam at the orifice substantially unidirectional. 2. A dead weight valve for a pressure cooker as claimed in Claim 1 wherein the cup is made of a heat insulating material. 3. A dead weight valve for a pressure cooker as claimed in any one of the preceding Claims wherein the cowl of the body is made of a heat insulating material. 4. A dead weight valve for a pressure cooker as claimed in any one of the preceding Claims wherein the cup is mounted in a cavity in the top handle of the cooker. 5. A dead weight,valve for a pressure cooker substantially as herein described and illustrated in the accompanying

Documents:

564-mas-2001 abstract.pdf

564-mas-2001 claims duplicate.pdf

564-mas-2001 claims.pdf

564-mas-2001 correspondence others.pdf

564-mas-2001 correspondence po.pdf

564-mas-2001 description (complete) duplicate.pdf

564-mas-2001 description (complete).pdf

564-mas-2001 drawings duplicate.pdf

564-mas-2001 drawings.pdf

564-mas-2001 form-1.pdf

564-mas-2001 form-19.pdf

564-mas-2001 form-26.pdf