US2035901A - Pressure cooker - Google Patents

Description

L. L. LUDINGTON PRES SURE COOKER Filed May 23, 1955' INVENTOR Y Y Z azure/zeal Ludmgioz;

ATTORNEYS March 31, 1936.

Patented 1 ATES 2,035,901 raasspna cooxna Lawrence L. Ludington, Muneie, Ind., assignor to Bali Brothers Company, 'Muncie, Ind., a cor-,

poration of Indiana Application May '23, 1935, Serial No. 23,030

2 Claims.

, The object ofmy invention is to provide a pressure retaining structure, comprising a container anda closure therefor, the closure being provided with readily operable retaining means 5 of such character as to serve not only to clamp the closure into pressure retaining position but also to force said closure from sticking association with its seat preliminary to removal.

, Theaccompanying drawing illustrates my invention.

Fig. 1 is an elevation in partial radial section, of an embodiment of my invention; and

Fig. 2 is a plan of the spring washer.

. In the drawing, I0 indicates the container provided at its mouth with an annular seat It and also provided with a plurality of circumfer'entially spaced lugs l2.

The cover I3 is provided with an annular seat It adapted to mate with seat I I. Cover I3 is provided with a plurality of circumferentially spaced lugs or bosses l5, corresponding in number and spacing with lugs I 2, and each of these lugs is perforated at I6, conveniently on an axis inclined inwardly and upwardly toward the axis of container in. The lower end of perforation I 6 isenlarged into a pocket ll. Mounted in each perforation. I6 and pocket I! is a hook shank I 8 threaded at its upper end as indicated at I9 and provided at its lower end with a hook 20 adapted to straddle a lug l2.

Threaded upon threads I!) is'an operating handle or knob'22 and interposed between this knob and the upper end of lug I5 is a spring washer 23. Interposedbetween hook 20 and boss l5, within pocket I1, is a spring 24.

The shank I8 is ensmalled, below threads 19, and the circular spring 23 extends into the groove thus formed so that, when knob 22 is backed A away from engagement with the spring 23 said spring serves to retain hook 20 from too great displacement axially relative to its boss ii thereby preventing the jaw of the hook from dropping below the plane of lugs l2 so that. by turning the cover the hooks may be readily shifted intoand out of co-ordination with said lugs.

Pocket I] is so formed as to prevent substantial rotation of shank l8 and book 20 without interfering with axial movement of said hook Y and the springs24 are of suflicient strength to break any sticking contact between seats l4 and.

Lugs l2 being circumferentially spaced, and hooks 20 being carried by the cover and being substantially non-rotative about their own axes,

it will be readily apparent that the cover may be seated when the cover is angularly positioned with its hooks 20 circumferentially offset from lugs I 2, and may then be readily angularly shifted to bring the hooks 20 into straddling positions over the lugs l2 whereupon by tightening knobs 5 22 the hooks 20 may be brought into engagement with the under sides of lugs l2 and the cover seat l4 forced into engagement with the container seat II. On the reverse, loosening of the knobs 22 permits springs 24 to force the heels of 10 the hooks 20 into engagement with the mouth of the receptacle and thus lift seat H from seat I I. The knobs 22 may serve as handles by means of which the cover may be transported and manipulated. 7 15 I claim as my invention:

1. In a pressure cooker, the combination with a container having a. series of circumferentially separated outwardly projecting lugs, and an annular cover seat, of a cover adapted to seat upon 20 said seat and provided with a series of perforated portions corresponding in number and spacing with said lugs, a clamping hook having a shank projected through and axially movable in each of said perforations and a jaw adapted to 25 laterally receive one of said lugs and to engage the same in opposite directions axially of the hook shank, a compression spring interposed between each hook and the cover, an operating knob threaded upon the, shank of each hook and 30 abutting the cover in opposition to said spring, and means limiting axial movement of the hook relative to the cover to retain its jaw in the plane of the container lugs when the cover is seated on said container.

2. In a pressure cooker, the combination with v a container having a series of circumferentially separated outwardly projecting lugs, and an annular cover seat, of a cover adapted to seat upon said seat and provided with a series of perforated 40 portions corresponding in number and spacing with said lugs, a clamping hook having a shank projected through and axially movable in each of said perforations and a jaw adapted to laterally receive one of said lugs and to engage the 45 same in opposite directions axially of the hook shank, means to limit rotation of each hook, a compression spring interposed between each hook and the cover, an operating knob threaded upon the shank of each hook and abutting the cover 50 in opposition to said spring, and means limiting axial movement of the hook relative to the cover to retain its jaw in the plane of the container lugs when the cover is seated on said container.

' LAWRENCE L. LUDINGTON.

Images