US1991946A - Filler neck - Google Patents

Description

Feb. 19, 1935. Q KNUTSON 1,991,946

FILLER NECK Filed April 28, 1951 Patented Feb. 19, 1935 UNITED- sures FILLER NECK Carl L. Knutson, Maywood, Ill., assignorto Cinch Manufacturing Corporation, Chicago, 11]., a

corporation of Illinois Application April 28, 1931, Serial No. 533,435 1 Claim. (Cl. 22040) My invention aims to provide improvements in filler necks for radiators, gasoline tanks and other such devices for motor vehicles and the like.

In the drawing which illustrates a preferred embodiment of my invention 5- Figure l is a plan view of an installation showing my invention with the cover removed;

Fig. 2 is a section taken on the line 2--2 of Figure 1;

Fig. 3 is a section taken Figure 1; v

Fig. 4 is an under side view 'of the installation shown in Figure 1 with the cover in place; and

Fig. 5 is a section taken on the line 5,5 of

on the line s 3 of Fig. 4.

Referring to the particular embodiment of my invention illustrated by the drawing, I have shown an improved filler neck for radiators and gasoline tanks which is made from a single piece of rectal and has means for cooperative engagement with a closure cap in a better and more desirable manner than has been in use heretofore.

The particular embodiment of my invention selected for illustration by the drawing is formed from a single piece of sheet metal drawn or otherwise formed to provide a tubular portion 1 having a flange 2 at the bottom end by which it is attached to the radiator, tank, or the like (only a portion of which is shown). The upper end of the tubular portion 1 is bent inwardly and downwardly toprovide a seat 3 against which the sealing part 4 of the closure cap 5 may seat. It is to be understood that any suitable cap structure maybe used and the one shown is merely a conventional form.

Extending inwardly from the downwardly turned wall portion 6, I have provided two flange portions 7-.'7 each of which is in a plane transversely to the axis of the device (Fig. l) and each of which is angled in a direction opposite to the other (Figs. 2 and 3) and inclines relative to a horizontal plane through the tubular portion 1. These flange portions 7-7 are at least twice as wide as the thickness of the metal and form blunt cam surfaces for cooperation with the ears 88 carried by the cap 5.

At that end of each cam flange '7 farthest from the seat end (Fig. 3) of the tubular portion 1, I have provided stop means 9 formed by bending the end of each flange 7 downwardly. Thus the stops 9-9 are below the flanges 77 and extend transversely thereto (Figs. 2 and 3) so that the ears 88 may come in contact therewith and limit the rotation of the closure cap 5,as best shown in Fi 4.

While my invention is simple, I believe it will be more clearly understood by a description of the operation of the attachment and removal of the closure cap 5. Assuming that rotation of the cap in a clockwise direction attaches it and rotation in a contra-clockwise direction detaches it, 5 it will be clearly understood that the cap may be attached by simply inserting the tubular portion 10 (Figs. 4 and 5) into the upper end of the tubular portion 1 and turning it in a clockwise direction. In attaching the cap 5, the ears 88 do not 0 have to be aligned with the notches 1l-11 between the fianges 7-'7 (Fig. 1) because if they strike against the upper surfaces of the flanges they will enter under the flanges through the notches 11-11 when the cap 5 is rotated. As the 15 cars 88 contact with the under surfaces of the cam flanges 7-,? the cap 5 is pulled downwardly so that the yieldable washer 4 will make a tight seal against the seat at the upper end of the tubular portion 1, as shown in Fig. 5. Upon continued rotation of the cap the ears 88 will engage the stops 99 (Fig. 4), thereby preventing unlocking of the cap except by rotation of it in a contraclockwise direction. The friction between the two parts is such that the cap 5 will be tightly held in various positions up to a'position where the ears 88 contact with the stops 9-9.

To remove the cap 5 it is merely necessary to turn it in a contra-clockwise direction and lift it. During this operation the cap is practically selfejecting because the ears come out from under the flanges. 77 and ride upwardly on the upper surfaces of the flanges (Fig. 4), thereby raising the cap automatically as it is turned. It should be noted that with my laterally arranged cam flanges 7-7 the stops 9-9 are arranged in such a manner that they do not engage the ears 88 during the removal operation. Therefore my improved cam surfaces act as means for locking the cap to the filler neck and as means for assisting in the removal of the cap.

My improved device is particularly desirable because the cam surfaces present wide, smooth surfaces which will not readily wear as compared with edge cam surfaces which are cut away by continued attachment and removal of the cap. Therefore, I can use a light gauge metal while providing rigid cam surfaces. Furthermore'my improved cam means helps in centering the cap 5 during attachment and helps to eject the cap during detachment. The top and bottom surfaces of the cam flanges are made use of during both the attaching and detaching operations.

While I have illustrated and described one preferred embodiment of my invention, I do not wish 55 10 ous wall presenting at its upper edge a seat for engagement with the sealing part of said cap, said wall terminating at its lower edge with spaced independent flanges, each presenting a broad flat continuous cam surface for engagement with the ears of said cap, whereby the surfaces of said flanges and ears may be in engagement under tension throughout a broad flat surface free from sharp edges having a tendency to cutting upon relative movement under tension.

CARL L. KNUTSON.

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