US2793786A

US2793786A - Closure

Info

Publication number: US2793786A
Application number: US458897A
Authority: US
Inventors: Walker Robert
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-09-28
Filing date: 1954-09-28
Publication date: 1957-05-28
Anticipated expiration: 1974-05-28

Description

May 28, 1957 If f9 R. WALKER CLOSURE Filed Sept. 28, 1954 a INVENTOR. if; 1? 0,2191? walker ATTORNEYS nit SW8- Pe -ea 71 2,793,786 H CLOSURE f Robert Walker, New Lisbon, Wis. v Application Septembe 23, 19s4,'sen;ti No. 458,891 .f i

3 Claims; totem-32y This invention relates to a closure, and more particularly to a dust-proof closure for containers holding fluid such as milk.

The object of the invention is to provide a closure or or cover which can be readily locked or unlocked on a container and wherein the cover in its closed or locked position will effectively seal an opening without the necessity of using gaskets.

Another object of the invention is to provide a selfsealing dust cover for closing manholes or the like that are in tanks that contain fluid such as milk, there being a clamp provided for preventing accidental opening of the cover.

A further object of the invention is to provide a dustproof cover which is extremely simple and inexpensive to manufacture.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this application, and in which like numerals are used to designate like parts throughout the same:

Figure 1 is a longitudinal sectional view taken through the closure of the present invention.

Figure 2 is a top plan view of the closure.

Figure 3 is a fragmentary sectional view of the closure showing the spring clamp.

Referring in detail to the drawings, the numeral designates a body that may be part of a container for holding fluid such as milk, and the body 10 includes a circular fiat portion 11 that has a collar 12 extending upwardly and inwardly therefrom, Figures 1 and 3. The collar 12 converges inwardly from the inner edge of the flat portion 11, and the upper end of the collar 12 terminates in a horizontally disposed flange 14. The flange 14 is provided with a circular central opening 15 which may be used for any suitable purpose, as for example for filling the container with fluid such as milk.

A closure is provided for closing the manhole or opening 15, and the closure or cover is indicated generally by the numeral 16. The cover 16 includes a cylindrical main portion 17 and a top portion 18 which may be of arcuate shape. The lower edge of the cover 16 is rolled outwardly and upwardly as at 19 to provide a curved lip, and this lip 19 engages the collar 12 to provide an effective seal between these parts. A means is provided for pivotally connecting the cover 16 to the body 10, and this means comprises a pair of spaced parallel apertured ears 20 which extend upwardly from the flat portion 11 and are secured thereto in any suitable manner, as for example by welding. A pin 21 pivotally connects a finger 22 to the ears 20, and the finger 22 is secured to the main por tion 17 of the cover 16 as shown in Figures 1 and 2.

A clam-ping means is provided for retaining the cover in its closed position, and this clamping means comprises lugs 23 which extend upwardly from the flat portion 11 and are secured thereto, and a pivot pin 24 hingedly connects a hollow casing 25 to the lugs 23. A rod 26 is slidably or reciprocably arranged in the casing 25, and

and the keeper 28 is adapted to have one of its ends en an enlarged head 27 is arranged on the inner end of the rod '26. A coil spring 31 is circu'mposed on the rod 26, and the? coil spring 31 is interposed between'thehead 27 and the upper end 32 of the casing-25. Secured to the upper-oroute'r end of the rod 26 is a keeper-or arm 28,

gage the upper flat surface 30 of a shoulder 29 which extends outwardly from'the cover 16. Thus, with the parts asf show'n'in Figure 3 the cover 16 will be retained'in its closed'position. Then, when the cover is to be raised or pivotedal'aoutthe pin 21, it is only necessary to manually lift the keeper 28 and then rotate the keeper 28 slightly to clear the shoulder 29 so that the cover'16 can then be swung" open. The coil'spring 31 retains thecover closed when the parts are in the position shown in Figure 3.

From the foregoing it is apparent that there has been provided a closure for an opening such as the opening 15. In use the clamp including the keeper 28 will retain the cover 16 in its closed position so that no dust or other foreign matter can pass through the opening 15 into the interior of a container. Thus, a seal is effected between the inclined collar 12 and the rolled lip 19 when the parts are in the position shown in the drawings and the coil spring 31 urges the head 27 downwardly so that the keeper 28 engages the flat surface 30 of the shoulder 29 to prevent accidental opening of the cover. Then, when the cover is to be opened as when the contents of the container are to be replenished or refilled, it is only necessary to manually raise the keeper 28 against the tension of the coil spring 31 and then rotate the keeper 28 slightly so that it clears the shoulder 29. Then, the cover 16 can be raised or swung open.

The lip 19 seats against the collar 12 and the collar 12 is formed at an angle of approximately 10 with respect to the horizontal plane. The dust cover of the present invention is especially suitable for use with tanks containing milk or other fluids whereby manholes in such ranged at an angle of approximately 10, there will be a continuous seal all around the opening due to the spring clamp.

I claim:

1. In combination, a body including a circular flat portion, an annular collar extending upwardly from the inner edge of said flat portion and converging inwardly, a horizontally disposed circular flange extending inwardly from the upper portion of said collar and provided with a central circular opening, a pair of apertured ears extending upwardly from said flat portion and secured thereto, a cover including a cylindrical vertically disposed main portion having an outwardly and upwardly rolled lip on its lower end forming a gutter for engagement with said collar, and a finger secured to said main portion of the cover and pivotally connected to said ears.

2. In combination, a body including a circular flat portion, an annular collar extending upwardly from the inner edge of said fiat portion and converging inwardly, a horizontally disposed circular flange extending inwardly from the upper portion of said collar and provided with a central circular opening, a pair of apertured ears extending upwardly from said flat portion and secured thereto, a cover including a cylindrical vertically disposed main portion having an outwardly and upwardly rolled lip on its lower end forming a gutter for engagement with said collar, a finger secured to said main portion of the cover and pivotally connected to said ears, and means for clamping said cover to said flat portion.

3 3. Incomhination, a'body-including a circular flat portion, an annular collar extending upwardly from the inner edge of said flat portion and converging inwardly, a horizontally disposed circular flange extending inwardly from the upp er portion of said collar and provided -with-,a cen: 5 tral circulanopening, a pair of apertured, ears extending; upwardlyfromsaid flat-portion, and secured5thereto, acover including a cylindrical vertically disposed, main; portion haying an outwardly and upwardly rolled-;lip --on;l its lowerend forming a gutter for engagementwith -said 10 collanafinger secured to said main portion-of the cover ipi o a y; conn d to s d a n "mc ns,f0.r: np-- ing saidz coverto-said fiat portion, said means cornprising a shoulder secured to theexterior, of said: cover andjncl ing: an upper flat surface, aperturedjugs secured;,tcn-sa t: 2011- 01 a a ing, hav ng. lower n p -vo ally on-.- nectedto said lugs, arod reeiprocably arranged igsaid a ndiha ng a ead n ji t n e r nd, a coil; sari- 2,:-

circumposed on said rod and abutting said head; and a keeper secured to the outer end, of saidrodjor engagement with the flat surface of said shoulder.

References Cited in the file of this patent UNITED STATES PATENTS McFarland Feb. 23, 1886 Gulick r Dec. 17, 1901 Steel Aug. 15, 1911 Meilinger June 3, 1919 Warren- ,No v. 21, 1922 Jackson 'L. Dec: 29; 1925 FOREIGN' 'PAT-E-NTS- Italy June 27, 1931 Germany Jan. 31, 1952