Патент USA US2407627код для вставки
SePt- 17. 1946 J. H. CHANDLER - 2,407,627 ` PRESSURE COOKER Filed Aug; 12, 194:5 . 25 342 ‘ 27 y 3,5 ÖH' - Í /3 )lK .ì lll" Í f3.9» ¿ /9 ` -fea /7 /2 2è’ 23 Il 2@ l l 2 g ¿9 J/ >Y* , , ' \ ,a y /6 zsheets-sheet 1 ;l` r “ 20 _ _ A R1 22 2/ , *_ 72 Q, ml `îi?l Sept. 17, 1946.A J. H.`cHANDLER 2,407,627> PRESSURE cooKER Filed Aug. 12, 1945 m -2 Sheets-Sheet 2 Patented Sept. 17, 1946 . 2,407,627 UNITED s'm'rEsV PAT-ENT ori-‘NICE PRESSURE COOKER James Harvey Chandler, Oak Park, Ill., assignor to Ekco Products Company, a corporation of Illi ‘ t nois Application August 12, 1943, Serial No. 498,347 (Cl. 22.0-25) 3 Claims. l . This invention relates to pressure cookersof the< type wherein an annular portion of the clo 2V ment of a closure I5 `of this invention may be effectively used. As illustrated, the vessel is of cylindrical shape having its side wall terminat sure or cover extending beyond the area' thereof corresponding to the area of the closure receiv ing at its upper limits in an inwardly and down wardly curled edge I l to deñne a mouth or' open ing opening is adapted to be confined within the container through upward pressure of said an ing at thel top of the vessel through which the nular portion of the cover against an `internal contents of the vessel may be introduced or with drawn. The curled edge II is adapted to re It is an object of this invention to provide a ceive a suitable gasket or packing member I2 in Yclosure for use 'in conjunction with `an internal 10 such a manner that the member I2 thus pro seating arrangement of this character embodying vides an annular downwardly facing seat within the vessel. features of construction whereby the introduc The closure i5 is circular in plan so as to pro tion and removal of the closure are facilitated. `This invention‘accordingl'y contemplates the vide an annular portion adapted to underlie the annular seat around the opening. ‘ Vuse of a closure adapted to be temporarily flexed seat formed `by the-member I2 surrounding the closure portion corresponding to the area of the linto a shape wherein its dimension is sufficiently reduced to be passed throughthe cooker opening mouth of the vessel I0. toward and away from a position below the an nular seat within the cooker receptacle through the action of flexing mechanism directly asso terial which contains suiiicient resiliency to per 20 mitof a certain amount of distortion (under the ciatedV with the closure. These and various other objects and advan tages are attained'with this invention, as Will be lapparent from the following description, taken in connection with the accompanying drawings wherein the invention is shown in its preferred form, it being evident that other forms of con struction and modifications may be adopted in `carrying out the objects and purposes of this invention. In the drawings: The closure is made of relatively thin sheet metal or other suitable ma ‘ Fig. 1 is a side elevational view with parts of the cooker receptacle in central vertical section, `action of flexing means associated with the clo sure and more fully hereinafter described) where by it may be temporarily sprung into a shape inserta-ble through the~mouth of the vessel as shown in Figs. 4 and 5, during movement toward and away from a position wherein the `annular portion of the closure underlies the seating mem ber I2. ` ` ` Means for temporarily flexing the closure I5 30 are preferably provided through the use `of a, yoke or bar I3 adapted to extend across the Vclo sure I5, in the manner sho-wn in Fig. 3, which yoke has a central aperture or bearing through ’illustrating the arrangement of parts when the which an axially projecting cylindrical stem or closure embodying the present invention is in 35 post I4, fastened as at I6 to the center of the operative relation to the receptacle. closure l5, may project. The collar I‘I fixed to the stem I 4 provides a stop against which the Fig. 2 is a similar view, `with parts omitted `yoke I3 may bear to prevent withdrawal of the and a part of the receptacle broken away, illus stem I4 from the yoke. Movement of the ste-m trating the device shown in Fig. 1 when turned through an angle of 90 degrees. 40 I6 relative to the yoke I3 from a position where in the collar I'.’ is engaged by the yoke I3` as Fig. 3 is a fragmentary top plan view of the shown in'Fig. 5 to aV positionwherein the collar same. . `I‘I is` spaced upwardly therefrom accordingly Fig. 4 is a side elevational view with parts causes the ends of the yoke to press against dia rof the cooker receptacle in central vertical sec tion, wherein the closure is shown in ñexed shape 45 metrically'opposite surface portions of the clo sure I5 inwardly from the annular portion of the and prepared for insertion through the closure receiving opening of the receptacle. closure normally adapted to engage the seating member I2 whereby the closure is warped or Fig. 5 is an enlarged vertical section taken , iiexed on an axis perpendicular to the longitudi online 5-5 of Fig. 4, with part of the recep Reference being had more particularly to the drawings, the numeral I0 designates a pressure nal axis of the yoke I3. It will be observed that sliding movement between the opposite ends of the yoke I3 and the surface of the closure con~ tiguous thereto incident to flexing of vthe cover is facilitated by giving a rounded or bulged shape _vessel of a type with which a preferred embodi- à Vto said yoke ends. -The yoke I3 is also provided tacle included to indicate relative width of the closure and the closure receiving opening when the Aclosure is ñexed as shown. ‘ ‘ 2,407,627 4 3 as to provide a more effective leak-proof seal between the seat member I2 and the surface of the closure I5. In order to provide a vent through which steam pressure may be released as desired, with a lateral extension or support I8 into which the shank I9 of a handle ZIJ may be fastened. The handle 20 is preferably of such length as to overhang the handle 2l secured to the side wall >of a vessel I0 through a ferrule 22, when the closure I5 is in operative position as shown in the stem Iâ is preferably hollow throughout its length thereby fonming a passage in communi cation with the interior of vessel Ill. Under this arrangement the upper end of the stem I4 pro the drawings. Pivoted at 23 between the upper ends of a pair of spaced parallel arms 24 rprojecting upwardly» from the outer end of the bracket or support I8 for swinging movement in a vertical path in alignment with the longitudinal axis of the clo vides a seat for a suitable valve such as a weight The inwardly projecting end of the lever 25 is 34 as shown in Fig, 5. A safety steam vent in the form of a rubber plug 35 may also be fitted on the closure I5. The particular type of fittings described and shown herein are, however, merely indicative of any suitable form of fitting adapted forked as at 26 for the purpose of embracing aA for use in connection with a pressure cooker as sure handle 20, is a lever 25. lportion of the stem I4 between the collar I"I and contemplated 'by this invention. a similar collar or projection 21 fixed to stem I4 and spaced upwardly from said collar I‘I. Y The closure I5 is accordingly forced into a diametri ple as a circular disc of sheet metal stock of .018 A thin flexible closure member, such for exam inch to .020 inch thickness, of suitable spring cally warped shape against the opposite ends of 20 temper, with only the use of a relatively fiat smooth peripheral face portion in Contact with the yoke I3 through pulling force exerted on the the underside of a rigid circular annulus sur stem I4 upon upward swinging movement of the rounding the opening in the top ofA a container, forked end of the lever 25. A thumb-piece 28 such for example as a two-quart capacity drawn carried at the free outer end of the lever 25 pro vides a bearing which the user may press with 25 cylindrie vessel of sheet metal stock of .040 inch thickness, corresponding substantially to the the thumb of the hand which grasps the closure shape of vessel I5 as shown in the drawings, handle 25 whereby the lever 25 is easily operated including an inwardly curled edge II, is illustra to cause flexing of the closure. Upon release of tive of one preferred embodiment of a pressure V(pressure on the thumb-piece 28,'the resiliency of the closure will immediately cause it to` spread 30 container as contemplated by the present inven tion. or relax into normal shape effective to position However, it will be apparent that various changes might be made lin the structure and de the annular edge portion thereof in a plane effec tive to engage the seating member I2. Because sign of the elements involved in said example to stem Ill provides a bearing or` pivot on which form a pressure container of the general char . acter described, all without departing from the the yoke I3 may turn, the axis on which the closure> I5 is warped as described herein, may ‘be varied as the relative angular position of the yoke I3 is changed with respect tov a selected spirit of this invention as defined in the annexed claims. » f This ar What is claimed is: l. In a pressure cooker, a vessel having> an rangement rnakes it possible to avoid a perma nent “set” or Warped shape in the closure mem 40 opening through which contents of _ the Vessel _ may be admitted or discharged, a downwardly diametrical line across the closure. ber i5 when it is no longer sub-jected toexternal iiexing stresses by the yoke I3, .which might otherwise develop where bending or flexing is facing seat within the vessel `surrounding said opening, means engageable with said seat to seal said opening including a flexible closure member confined to the same axis each time the closure 45 having an annular portion extending peripherally beyond the area thereof corresponding to the area is applied to or removed from the seat I2. of said opening and adapted to betemporarily After the closure I5 is confined within the ves flexed into a shape enabling its passage Vthrough sel and released from pressure of the flexing mechanismes above described, the closure I5 is adapted to be lifted into a position against the'- v50 seating member I 2 by rocking the closure handle 20 toward the vessel handle 2l, A suitable ful said opening toward and awayfrom a position wherein said closure engagesV said seat, a rigid yoke member having contact faces presentable projecting leg 29 provided at the inner end of the handle 2i] which leg is adapted to pivot in a¿ toward upper surfacel portions ofthe closure in downwardly advanced position relative tothe central portion of the yoke against whichvdia metrically opposite upper surface portions of the _recess or seat 3i) on the ferrule 22 of the vessel handle 2 I. The closure is preferably held in place closure located inwardly from its annular portion may be drawn upwardly to ñex the closure> into against the seating member I2 by any suitable a shape enabling its passage through said vessel opening when the central portions of said yoke crufm for this purpose consists of a downwardly means such, for example, as a latch 3| mounted for swinging movement on the handle 20 toward and away from a position in engagement with the vessel handle |‘2I as shown in Figs. l and 4. As the closure I5 is moved upwardly toward the seating member I2 through rocking movement of the closure handle 25 on its rpivot as aforesaid, ' a pair of ridges 32 and 33 at transversely oppo site internal sides of the vessel I0 and arranged vertically below the seat I2 are adapted to be engaged by the edges of the closure I5 whereby the closure may be easily guided into a central ~ position with reference to the mouth of the and closure are in vertical alignment, means for maintaining said central portion Yof the- yoke and said central portion of the closure in vertical alignment including a stem fixed to andproject# Y ing upwardly from the central portion of the closure, said yoke and stem being connected for relative movement axially of >said stem between an advanced position wherein said closure is placed under strain by said contact faces of the yoke to flex the closure into a shape enabling its passage through the vessel opening and an initial position wherein said closure is freed from strain vessel. to resume its normal uniiexed shape, a handle tightly pressed against the seat member I2 so having a forward portion fixed to said yoke and a rearward portion which projects laterally be yond the edge of the closure and about which a As pressure is built up within the vessel I0 it is apparent that the closure I5 will be more 2,407,627 6 hand may be flexed into operative position to support the closure, a lever movable about an axis in fixed relation to said yoke and operatively engaging said stem for moving said stem from initial position to advanced position relative to position relative to said yoke through the agency said yoke, said lever having a free end operable in such proximity to the handle throughout', the travel of the lever between initial and advanced positions of the stem relative to said yoke as to be within range of normal movement of the thumb of the hand operatively flexed about said handle whereby the lever may be operated to move said stem from initial position to advanced with the interior of said vessel when said closure is in engagement with said seat including a pas of pressure applied on said free end of` the lever by said thumb. 2. In a pressure cooker as deñned in claim 1, means providing a steam vent in communication sage extending lengthwise through said stem. 3. In a pressure cooker as defined in claim 1 wherein said yoke and stern are connected for relative pivotal movement about said stem as an axis. JAMES HARVEY CHANDLER.