# US 2014/0360384 A1 · Electric rice pressure cooker and pressure cooker without a rubber packing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360384 A1 - Document ID: US20140360384A1 - Status: Published application - Kind: A1 - Application number: 14/345,373 - Filed: 2012-09-13 - Published: 2014-12-11 - Earliest claimed: 2011-09-15 - Inventors: Woo Yong Kim - Web page: https://patentgrep.com/patent/US20140360384A1 ## CPC - A47J 27/08: Pressure-cookers; Lids or locking devices specially adapted therefor - A47J 27/0806: {of the bayonet-type} - A47J 27/09: Safety devices - A47J: KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES ## Abstract The present invention relates to an electric rice pressure cooker without a rubber packing, and more particularly, to an electric rice pressure cooker including a main body case having an open top, an inner pot installed inside the main body case, and a cover hinge-coupled to the main body case and disposed to cover the open top of the main body case, wherein the inner pot has a plurality of flange portions provided on a top portion thereof at certain intervals apart along a circumferential direction and has a tapered sloped surface formed on the top end thereof, and the cover comprises: a sealing member having a circular hole formed in the center thereof, being seated on the inner pot, and having a bottom surface that is seated on and contacts the inner pot and is formed to correspond to the top end of the inner pot; and an inner cover provided with a receiving space therein in which the sealing member can move vertically, the inner surface of the receiving space being configured to maintain a tight seal with the peripheral end portion of the sealing member. The sloped surface of the inner pot is tapered toward the inside, the sealing member is provided with a bent portion so as to contact the sloped surface of the inner pot and the inner surface of the inner cover, and a part of the bent portion contacting the sloped surface is formed as a sealing surface corresponding in shape to the sloped surface, so that steam generated during cooking passes through the circular hole and presses the sealing member downward to maintain a tight seal with the inner pot. ## Claims ### Claim 1 An electric rice pressure cooker without a rubber packing, the pressure cooker comprising: a main body case which has an open top; an inner pot which is provided inside the main body case; and a cover which is hinge-coupled to the main body case and disposed to cover the open top of the main body case, wherein the inner pot comprises: a plurality of flange portions provided on a top portion of the inner pot at predetermined intervals along a circumferential direction of the inner pot; and a tapered sloped surface formed on the top end of the inner pot, and the cover comprises: a sealing member which has a circular hole in the center thereof and is seated on the inner pot, and has a bottom surface which is seated on and contacts the inner pot, and is formed to correspond to the top end of the inner pot; and an inner cover which has a receiving space therein in which the sealing member moves vertically and the inner surface of the receiving space is configured to maintain a tight seal with the peripheral end portion of the sealing member, and the sloped surface of the inner pot is tapered toward inside, and the sealing member has a bent portion so as to contact the sloped surface of the inner pot and the inner surface of the inner cover, and a part of the bent portion contacting the sloped surface is formed as a sealing surface which corresponds in shape to the sloped surface so that steam generated during cooking passes through the circular hole and presses the sealing member downwards to maintain a tight seal with the inner pot. ### Claim 2 An electric rice pressure cooker without a rubber packing, the pressure cooker comprising: a main body case which has an open top; an inner pot which is provided inside the main body case; and a cover which is hinge-coupled to the main body case and disposed to cover the open top of the main body case, wherein the inner pot comprises: a plurality of flange portions provided on a top portion of the inner pot at predetermined intervals along a circumferential direction of the inner pot; and a tapered sloped surface formed on the top end of the inner pot, and the cover comprises: a sealing member which has a circular hole in the center thereof and is seated on the inner pot, and has a bottom surface which is seated on and contacts the inner pot, and is formed to correspond to the top end of the inner pot; and an inner cover which has a receiving space therein in which the sealing member moves vertically and the inner surface of the receiving space is configured to maintain a tight seal with the peripheral end portion of the sealing member, and the sloped surface of the inner pot is tapered toward outside, and the sealing member has a bent portion so as to contact the sloped surface of the inner pot and the inner surface of the inner cover, and a part of the bent portion contacting the sloped surface is formed as a sealing surface which corresponds in shape to the sloped surface so that steam generated during cooking passes through the circular hole and presses the sealing member downwards to maintain a tight seal with the inner pot. ### Claim 3 (depends on 1, 2) The pressure cooker of any one of claims 1 and 2, further comprising a separation prevention member which prevents the sealing member and the inner cover from being separated farther than a predetermined distance. ### Claim 4 (depends on 3) The pressure cooker of claim 3, wherein the separation prevention member is a pin having a lower portion on which a thread is formed and having a head with a diameter longer than the diameter of the pin body. ### Claim 5 (depends on 1, 2) The pressure cooker of any one of claims 1 and 2, wherein a sealing maintenance member is provided at the end portion of the sealing member facing the inner surface of the inner cover. ### Claim 6 (depends on 5) The pressure cooker of claim 5, wherein the sealing maintenance member comprises an elastic member which is formed as a hemisphere or o-ring so as to maintain a tight seal and provide elastic deformation. ### Claim 7 (depends on 1, 2) The pressure cooker of any one of claims 1 and 2, wherein the sealing member is made of stainless steel. ### Claim 8 (depends on 1, 2) The pressure cooker of any one of claims 1 and 2, further comprising a locking rotation body which is selectively locked with the flange portions with rotating with respect to the inner pot. ### Claim 9 An electric rice pressure cooker without a rubber packing, the pressure cooker comprising: a main body case which has an open top; an inner pot which is provided inside the main body case; and a cover which is hinge-coupled to the main body case and disposed to cover the open top of the main body case, wherein the inner pot comprises a plurality of flange portions disposed along a circumferential direction on the outer circumference surface of the top portion of the inner pot, and the cover comprises: a sealing member which has on the peripheral portion of the sealing member a sealing protrusion protruding downwards so as to contact the top surface of the inner pot, and has at the center a hole penetrating the sealing member between the top surface and the bottom surface of the sealing member; and an inner cover which guides the sealing member so that the sealing member moves vertically and which is position-fixed on the flange portions by a lock rotation body, and a sealing space in which steam flowing in through the hole of the inner cover is sealed off from the outside is provided between the sealing member of the inner cover, and when steam is generated inside the inner pot, the sectional area of the top surface of the sealing member which the steam flowing into the sealing space through the hole contacts is greater than the sectional area of the bottom surface of the sealing member which the steam contacts, thus allowing the steam to press the sealing protrusion of the sealing member onto the top surface of the inner pot. ### Claim 10 (depends on 9) The pressure cooker of claim 9, wherein the horizontal area of the sealing space is greater than the horizontal area of the inner pot. ### Claim 11 (depends on 9) The pressure cooker of claim 9, wherein the sealing protrusion has a cross section of a trapezoid shape. ### Claim 12 (depends on 9) The pressure cooker of claim 9, wherein the sealing member comprises: a first part which is inserted into the inside of the inner pot; and a second part which is coupled with the first part to form one body, and is exposed to the outside of the inner pot and has the sealing protrusion on the bottom surface of the peripheral of the second part, and the inner circumferential surface of the top end of the inner pot is sloped downwards toward the center of the inner pot, thus allowing the first part to be easily inserted into the inside of the inner pot. ### Claim 13 (depends on 12) The pressure cooker of claim 12, wherein the inner circumferential surface of the inner pot is rounding-processed. ### Claim 14 (depends on 12) The pressure cooker of claim 12, wherein a concave groove formed upward is provided between the sealing protrusion and the first part. ### Claim 15 (depends on 9) The pressure cooker of claim 9, wherein the inner cover comprises an elastic bias member which elastically biases the sealing member onto the inner pot. ### Claim 16 (depends on 9) The pressure cooker of claim 9, further comprising a detachable coupling unit which detachably couples the inner cover and the sealing member. ### Claim 17 A pressure cooker without a rubber packing, comprising: a pressure pot which has an open top, and in which grains required to be cooked are placed and a plurality of flanges are provided on the top end of the pressure pot along the circumferential direction at predetermined intervals; a locking rotation body which rotates with respect to the pressure pot and is selectively locked into the flanges; a sealing member in which a sealing surface capable of contacting the top end of the pressure pot is provided on the peripheral of the sealing member, and a hole penetrating the sealing member between the top surface and bottom surface of the sealing member is formed to allow steam generated from the pressure pot to be discharged to the above the sealing member; an inner cover which guides the sealing member in order for the sealing member to move vertically, and has a sealing space between the inner cover and the sealing member where steam generated from the pressure pot is filled, and is position-fixed in the locking rotation body; and a position moving unit which allows position movement of the sealing surface of the sealing member according to rotation of the locking rotation body between a first position where the sealing surface of the sealing member contacts the top end of the pressure pot and a second position where the sealing surface of the sealing member is separated from the top end of the pressure pot. ### Claim 18 (depends on 17) The pressure cooker of claim 17, wherein the position moving unit comprises: a sliding member which is coupled with the sealing member and capable of moving vertically together with the sealing member; and a guide member which is provided in the locking rotation body and according to rotation of the locking rotation body moves the sliding member vertically. ### Claim 19 (depends on 18) The pressure cooker of claim 18, wherein the sliding member comprises a guide pin protruding from the side surface of the sliding member, and the guide member comprises a slot having a height varying along the circumferential direction, into which the guide pin is inserted and slidingly contacts. ### Claim 20 (depends on 18) The pressure cooker of claim 18, wherein a first penetration hole into which the sliding member is inserted is provided on the peripheral of the inner cover, and the inner cover is coupled with a support member on which a second penetration hole which is disposed separated from the first penetration hole and into which the sliding member is inserted is formed, thus allowing the sliding member to be inserted into the first and second penetration holes and guided to move vertically. ### Claim 21 (depends on 18) The pressure cooker of claim 18, wherein an elastic pressure member which presses the sealing member downwards is provided in the sliding member. ### Claim 22 (depends on 21) The pressure cooker of claim 21, wherein the elastic pressure member comprises: a pressure pin part of which is disposed in the sliding member and the rest part of which is protruding from the sliding member so as to contact the sealing member; and a spring which is provided in the sliding member and elastically presses the pressure pint toward the sealing member. ### Claim 23 (depends on 17) The pressure cooker of claim 17, wherein a sealing protrusion protruding downwards so as to contact the top end of the pressure pot is provided on the sealing surface. ### Claim 24 (depends on 18) The pressure cooker of claim 18, wherein the sliding member comprises: a top portion; a bottom portion which is disposed separated from the top portion such that the peripheral of the sealing member is inserted between the top portion and the bottom portion; and a connection portion which connects the top portion and the bottom portion, and the bottom portion rotates with respect to the connection portion in order for the sealing member to get out of the sliding member. ### Claim 25 (depends on 17) The pressure cooker of claim 17, wherein when steam is generated inside the pressure pot, the sectional area of the top surface of the sealing member which the steam flowing into the sealing space through the hole contacts is greater than the sectional area of the bottom surface of the sealing member which the steam contacts, thus allowing the steam to press the sealing member onto the top surface of the inner pot. ### Claim 26 (depends on 17) The pressure cooker of claim 17, wherein the sealing member is made of any one material of aluminum, pig iron, copper, brass, and stainless steel. ### Claim 27 (depends on 17) The pressure cooker of claim 17, wherein between the inner cover and the sealing member, a bellows spring to maintain a tight seal of the sealing space is provided. ### Claim 28 (depends on 27) The pressure cooker of claim 27, wherein the bellows spring has a cross section of a “C” shape, and according to the varying distance between the inner cover and the sealing member, elastically retracts or restores. ### Claim 29 (depends on 27) The pressure cooker of claim 27, wherein one end of the bellows spring is fixedly coupled with the peripheral of the cover body of the inner cover, and the other end of the bellows spring is fixedly coupled with the sealing portion.