[특허]Microwave pressure cooker

TTK Prestige Limited

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Microwave pressure cooker

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H05B-006/80
미국특허분류(USC)	219/735; 219/734
출원번호	US-0809746 (2010-02-22)
등록번호	US-8247751 (2012-08-21)
우선권정보	IN-46/CHE/2010 (2010-01-07)
국제출원번호	PCT/IN2010/000102 (2010-02-22)
§371/§102 date	20100621 (20100621)
국제공개번호	WO2011/083486 (2011-07-14)
발명자 / 주소	Jagannathan, Tiruvallur Thatai
출원인 / 주소	TTK Prestige Limited
대리인 / 주소	Lerner, David, Littenberg, Krumholz & Mentlik, LLP
인용정보	피인용 횟수 : 8 인용 특허 : 5

초록
▼

The invention relates to a microwave pressure cooker including a container open at its top which includes a cover with a gasket adapted for ledge interlock type sealing and lug locking engagement with the container. There are two regulator opening means provided as valve opening through the cover (2) such that one of the deformable diaphragm type pressure regulator means formed are disposed on these regulator opening means which deform responsive to the pressure in the enclosure. A push rod type gasket offset device means is also provided on locking lug and opening and closing aid of the cover for releasably maintaining the container and the cover in sealing engagement. Further a filter is disposed removably on the first regulator opening means, which controls the pressure building within the enclosure.

대표
청구항
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1. A microwave pressure cooker formed with a container open at its top comprising the following: (a) a cover with a gasket adapted for ledge interlock type sealing and lug locking engagement with said container to form an enclosure for pressure cooking with the container;(b) a first and a second regulator opening means forming valve openings through said cover;(c) a primary deformable diaphragm type pressure regulator means with slits formed therein adapted to be disposed on the first regulator opening means, and which is responsive to the pressure in the enclosure;(d) a secondary deformable pressure indicator cum regulator means adapted to be disposed on the second regulator opening means formed on the cover and which is responsive to pressure in the enclosure;(e) a push rod type gasket offset device means mounted on locking lug and an opening and closing aid of cover for releasably maintaining said container and the cover in said sealing engagement responsive to disposition of gasket on the cover and the movement of said gasketed cover relative to said container to a lock position; and(f) a filter adapted to be disposed removably on the first regulator opening means, wherein said primary pressure regulator means is a pressure responsive diaphragm, characterized in the non-metallic deformable microwave permeable diaphragm type pressure regulator means, the diaphragm adapted to be disposed on the cover of the cooker, said diaphragm having a slit made thereon and which diaphragm responds when encountering a pressure increase within the container to change the slit into an open configuration responsive to pressure development within the closed cooker enclosure, when the pressure is greater than a selected nominal working pressure of the cooker, said diaphragm further characterized in that it is generally a flat disc shaped pressure responsive member, adapted to be disposed in the hole of the receptacle type regulator opening means formed on the cover of the cooker, said disc portion including an outer cooperating upwardly and downwardly extending peripheral protuberances as gripping means that engage fittingly a portion around the regulator opening means at the opposed sides of the opening hole respectively. 2. The microwave pressure cooker as claimed in claim 1 wherein said secondary pressure indicator cum regulator means is a pressure responsive type body characterized in the non-metallic deformable ‘H’ shaped body formed with a flat central circular diaphragm in the tubular cylinder body in the mid portion of said body having a plurality of operating thresholds, the regulator being of the type comprising of the body with two extreme upper and bottom circular edge type flanges forming outwardly extending lip, which protruding edge sits on the hole of the pressure regulator opening means formed on the cover of the cooker and substantial portion hanging freely underneath the cover, characterized in that the tubular cylinder body moves upward under increasing pressure to lift gradually the upper portion of the body towards the underside of the cover, thereby pushing sealingly the central flat circular diaphragm up and the bottom flange against the underside of the cover such that the upper portion is visible above the surface of the cover, under the effect of the pressure applied on the body disposed within the closed cooker enclosure, when operating at first operating threshold and ejecting wholly from the cover under the effect of the pressure applied on the body disposed within the closed cooker enclosure when operating at second operating threshold, wherein second operating threshold pressure is greater than the first operating threshold pressure. 3. The microwave pressure cooker as claimed in claim 1 wherein said secondary pressure regulator valve cum indicator means is a pressure responsive type characterized in the non-metallic deformable ‘H’ shaped body formed with a flat central circular diaphragm in the tubular cylinder body in the mid portion of the body having operating thresholds, the regulator being of the type comprising of the body with two extreme upper and bottom circular edge type flanges forming outwardly extending lip, which protruding edge sits on the hole of the pressure regulator opening means formed on the cover of the cooker, and substantial portion hanging freely underneath the cover, characterized in that the tubular cylinder body moves upward under increasing pressure to lift gradually the upper portion of the body towards the underside of the cover, thereby pushing sealingly the central flat circular diaphragm up and the bottom flange against the under side of the cover such that the upper portion is visible above the surface of the cover, under the effect of the pressure applied on the body disposed within the closed cooker enclosure when operating at first operating threshold and the central flat circular diaphragm adapted further to have a slit formed in the centre of the diaphragm in closed configuration, such that the slit changing to open configuration under the effect of pressure applied on the body disposed within the closed cooker enclosure, thereby forming a path for fluid from interior to exterior of the cooker when operating at intermediate operating threshold, and ejecting wholly from the cover under the effect of pressure applied on the body when operating at second operating threshold, wherein said intermediate operating threshold pressure is greater than first threshold pressure and second operating threshold pressure is greater than intermediate operating threshold pressure. 4. The microwave pressure cooker as claimed in claim 1 wherein said secondary pressure indicator cum regulator means is a pressure responsive type casing characterized in the non-metallic non-deformable core projecting from the bottom of an elastically deformable casing and surrounded by the casing, having plurality of operating thresholds, the regulator being of the type comprising of the casing fixed to the cover of the cooker, substantially disposed in the hole of the regulator opening means, generally underneath the cover, with the free end of the core flush with the surface of the cover, characterized in that the casing is deformed under increasing pressure to compress gradually the casing towards the underside of the cover, thereby pushing upwardly the core for visibility of the free end of the core above the surface of the cover, under the effect of the pressure applied on the casing, disposed within the closed cooker enclosure, when applied pressure is greater than a first operating threshold and further adapted for ejecting wholly from the cover under the effect of further higher pressure applied on casing disposed within the closed cooker enclosure when applied pressure is greater than a second operating threshold, wherein second threshold pressure is greater than the first threshold pressure. 5. The microwave pressure cooker as claimed in claim 1 wherein said secondary pressure indicator cum regulator valve means is a pressure responsive type casing characterized in the non-metallic non-deformable core projecting from the bottom of an elastically deformable casing and surrounded by the casing, having operating thresholds, the regulator being of the type comprising of the casing fixed to the cover of the cooker, substantially disposed in the hole of regulator opening means fully underneath the cover, with the free end of the core flush with the surface of the cover, characterized in that the casing is deformed under increasing pressure to compress gradually the casing towards the underside of the cover, thereby pushing upwardly the core for visibility of the free end of the core above the surface of the cover, under the effect of the pressure applied on the casing, disposed within the closed cooker enclosure when applied pressure is greater than a first operating threshold, and the core adapted further to have a slit formed therein at its distal tip in closed configuration, such that the slit changing to open configuration under the effect of pressure applied on the casing, disposed within the closed cooker enclosure, thereby forming a path for fluid from interior to exterior of the cooker when applied pressure is greater than an intermediate operating threshold and further adapted for ejecting wholly from the cover under the effect of the further higher pressure applied on casing disposed within the closed cooker enclosure when applied pressure is greater than a second operating threshold, wherein intermediate operating threshold is greater than the first threshold pressure and second operating threshold pressure is greater than the intermediate operating threshold pressure. 6. The microwave pressure cooker as claimed in claim 1 wherein said container having locking lugs along the rim and the said cover also having matching locking lugs along the rim cooperating with the lugs of the container, the pressure regulator is said push rod type gasket offset device means for forming an offset projection on one of the said cover locking lugs cooperating with opening and closing aid, said push rod type gasket offset device means comprising: a flexible deformable lug gasket mounted along the wall of locking lug of the cover;an opening in the cover for providing a pathway between the interior of said cover and interior of opening and closing aid;a free sliding push rod disposed in said pathway of said opening of said cover extending partially into said interior of said cover and into said interior of said opening and closing aid and supportingly abutted against said lug gasket, providing a fluid path between the interior and exterior of the cover and enclosure, and such that adapted to contact the cover gasket as said cover is moved for a sealing engagement with said container to close the cooker, slidably moving completely into the interior of said locking lug, thereby closing the fluid path with the cover gasket between the interior and exterior of the enclosure, only when the cover gasket is fully disposed on the cover rim; anda detachable gasket offset device cover disposed on the locking lugs of the cover adapted for mounting the lug gasket within and disposing the movable sliding pushrod. 7. The microwave pressure cooker as claimed in claim 1 wherein said first regulator opening means is an open annular cylindrical length of enclosed receptacle body formed underneath the cover for collecting the discharge vapour of a predetermined volume and generally formed integral with the cover, said receptacle body has a generally circular opening or a cutout at its bottom adapted for removably disposing the primary diaphragm type pressure regulator means, thereby forming a open cavity arrangement. 8. The microwave pressure cooker as claimed in claim 1 wherein the first regulator opening means is a covered annular cylindrical length of enclosed receptacle body formed underneath the cover as vapour collecting and discharging volume, said means having a receptacle body with a generally circular opening or a cutout at its bottom adapted for removably disposing the primary diaphragm type pressure regulator means and including a removably affixed receptacle cover adapted for its top end forming a cavity arrangement, said receptacle cover further adapted with lip or a protrusion at the peripheral top edge so as to form an opening in the said cavity arrangement. 9. The microwave pressure cooker as claimed in claim 8 wherein the receptacle cover is a smooth dome like structure in its inner surface for deflecting the steam ejecting from the open slit of the pressure regulator radially around and within the receptacle cavity arrangement. 10. The microwave pressure cooker as claimed in claim 8 wherein the receptacle cover has at least one cone type projection in its inner surface for deflecting the steam radially and uniformly into the receptacle cavity arrangement. 11. The microwave pressure cooker as claimed in claim 1 wherein the first regulator opening means is a receptacle type regulator opening means and is such that the opening regulator means further is adapted with a filter comprising at least a perforated material covering the hole at the outside bottom of the receptacle. 12. The microwave pressure cooker as claimed in claim 11 wherein the filter is characterized in the flat circular shaped plate type perforated material having two diametrically disposed perpendicular pins each of the pins fixedly mounted generally on the peripheral edge of the flat plate and adapted to engagingly fit at its free end into corresponding holes formed on the bottom surface of the receptacle type regulator opening means for receiving said pin so as to anchor said filter from the cover, and further characterized in that said two holes are further provided with a grommet for receiving and holding the pin and are open to atmosphere, thereby ordinarily preventing the pressure building within the enclosure for the pressure cooking until the filter is mounted so as to engagingly fit the pins into corresponding holes containing the grommet. 13. The microwave pressure cooker as claimed in claim 1 wherein the second regulator opening means is a hole formed on the cover on to which the secondary regulator means is removably disposed. 14. The microwave pressure cooker as claimed in claim 1 wherein the primary pressure regulator means is further adapted to reset the slit into close configuration responsive to pressure decrease within the closed cooker enclosure below a nominal working pressure. 15. The microwave pressure cooker as claimed in claim 1 wherein the secondary pressure regulator means is further adapted to reset the slit into close configuration responsive to pressure decrease within the closed cooker enclosure below the intermediate operating threshold pressure. 16. The microwave pressure cooker as claimed in claim 15 wherein the secondary pressure regulator means is such that the slit is further adapted to auto-reset into close configuration responsive to pressure decrease within the closed cooker enclosure, below the intermediate operating threshold pressure. 17. The microwave pressure cooker as claimed in claim 1 wherein the secondary pressure regulator means is further adapted to retract into original mounting position responsive to the pressure decrease within the closed cooker enclosure from the first threshold pressure to equal or below the ambient pressure. 18. The microwave pressure cooker as claimed in claim 1 wherein the secondary pressure regulator means is further adapted to auto retract into original mounting position responsive to the pressure decrease within the closed cooker enclosure below the first threshold pressure. 19. The microwave pressure cooker as claimed in claim 1 wherein the primary pressure regulator means is such that the cylindrical half portion above the central diaphragm is identical to the cylindrical half portion below the central diaphragm. 20. The microwave pressure cooker as claimed in claim 1, wherein the container, cover, cover gasket, the primary pressure regulator means, secondary pressure indicators cum regulators, push rod type pressure regulator, filter, gasket offset device means with cover and screws grommet and receptacle type opening means are all constructed of a microwave permeable material. 21. The microwave pressure cooker as claimed in claim 1 wherein the container is provided with projecting ribs along the outer surface for facilitating grip and to improve necessary mechanical strength. 22. The microwave pressure cooker as claimed in claim 1 wherein the cover is provided with projecting ribs along its inner surface to improve necessary mechanical strength. 23. The microwave pressure cooker as claimed in claim 1, wherein the cover gasket is generally V shaped in cross section. 24. The microwave pressure cooker as claimed in claim 1, wherein said container is adapted for further interlock with cover with a pair of chamfer formed on two portions of the inner rim of the container top edge, characterized in each of the chamfer portion corresponding to the span of the two movable pushrod of the gasket offset means.

이 특허에 인용된 특허 (5)

이 특허를 인용한 특허 피인용횟수: 8

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특허 상세정보

Microwave pressure cooker

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이 특허에 인용된 특허 (5)

이 특허를 인용한 특허 피인용횟수: 8

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Microwave pressure cooker

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이 특허에 인용된 특허 (5)

이 특허를 인용한 특허 피인용횟수: 8

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