US1887700A - Stopper or closure - Google Patents

Description

Nov. 15, 1932. T. A. STEVENS sToPPER on cLosURE Filed July 5, 1929 Patented Nov. 15, 1932 UNITED STATES THOMAS ARTHUR STEVENS, OF

WOLVEBHAMPTON, ENGLAND STOPPER R CLOSURE Application led July 6, 1929, Serial No. 376,308, and in Great Britain July 6, 1928. i

This invention comprises certain improve-. ments in or relating to Stoppers or closures, and it has for its object to provide a stopper or closure member which can be quickly attached or detached and which is so constructed that should the cap slack back, through vibration of the member carrying the stopper, the seal will still be maintained. A liquid tight joint is also normally obtained without relying on spring pressure and leakage is prevented. The device is simple and cheap to manufacture.

According to the present improvements, the removable cap or cover of the device is held on the fixed neck by means of a wedge or cam action, the cap or cover ybeing engaged over the neck of the stopper and rotated so that the cap is drawn downwardly on the neck to thus seal the opening therein. A stop is provided which limits the backward rotation of this cap so that, shouldthe cap rotate in a backward direction due to vibration or other causes, such cap cannot be completely removed without first releasing the cap from the stop. Means are also provided so that a liquid seal is still maintained even should the cap slack back.

Referring to the drawing Figure 1,is a side elevation of a closure device constructed according to this invention showing the cap in position before it is forced` down by projections thereon engaging under inclined shoulders on thel neck of the container.

"Figure 2 is an interior view of the cap, shown by Figure 1, detached.

Figure 3 is a plan view of the neck of the container on which the cap is fixed.

Figure 4 is a side view, in develo the neck shown by Figure 3. j

Figure 5 is a central cross-sectional view of the Closureshown by Figure l, and

Figure 6 shows in side elevation, the various parts of the closure detached. c j According to 'a convenient embodimente-S ,applied to a stopper for petrol or other tanks. the neck 1 of the tank is formed. with two diametrically opposite slots 2. A collar o on each side of the slots is so shaped that wedge shaped shoulders 3 are formed. A

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tongue or stop is provided on each side of the slot, one tongue 4.- forming a stop to prevent release of the cap by vibration, whilst the other tongue 5 forms a stop to give registering position for the release of the cap. The cap has a rim 6 which is of reduced dii meter at the outer end, the upper portion forming an annular recess 7. Two diametrically opposite internal projections 8 are pressed from the edge of the rimof the cap. These projections pass through the recesses 2 and, when the cap' is rotated, the ,edges thereof engage -the Wedge shoulders 3. A cup-shaped member 9 has a leather or like sealing ring 10 fixed near the periphery of 65 an outwardly directed flange 11. The outwardly directed flange 11 on they cup fits inside the annular recess 7 of the cap, and has a limited axial movement there-in. A cornpression spring 12 is fitted inside the cup 70 and bears at one end on said cup and at the other end on the inside of the cap. This spring ensures thatthe sealing ring will be tightly pressed against the rim of the stopper when the wedging action is inoperative, and that'the projections on the cap are in Contact with the inclined or wedge shoulder. When the cap is tightened down the sealing washer is clamped between the cap and the neck 1, and the pressure of the spring is not operative for sealing purposes. vShould the cap rotate in a backward direction through vibration or other causes, the projections 8 thereon will abut against .the stopy 4 formed near the recesses in the neck and thereby prevent the cap being completely disengaged from the neck without irst pressing the cap downwardly, against the action of the spring, until the lugs are below the stop 4; the cap can lthen be rotated a small amount to bring theprojections 8 and recesses 2 into regis- To prevent the capbeing rotated beyond the release registering position the stop 5 is of greater depth than the stop 4 so that when the cap is rotated the projections 8 will abut against the stop 5.

i At the centre of the cup of theplate 9, a raised portion 9a is formed. An`air vent hole 13 is formed therein, said air vent being preferably out of register with a vent hole 100 18A formed in the dome of the cap. A second cup-shaped plate 14 is fixed to the underside of the plate 9 by means of a rivet 17, and the rim fits against the underside of the sealing ring 10, so that such ringris clamped between this rim and the rim 11. This plate 14 has a raised portion 14a which lies opposite the raised portion 9a to form an interior chamber 16, and an air vent hole 15 is formed preferably in the centre of the plate 14. A chamber 19 is also formed between the plate 9 and the underside of the cap, sothat an petrol or the like which is splashedjrthrough the lower vent hole 15 into the chamber 16 will not be liable to escape through the vent 18 in the cap. The petrol entering the chamber 16 will either ow back through the lower vent hole or Creep up the joint between the two plates and then back into the tank. The gas pressure in the chamber 16 between the two plates is, in relation to the gas pressure in the chamber 19, such that any petrol or liquid which reaches the inside of said chamber 16 will not be assisted to escape through the air vent hole 13 formed in the top of the chamber. The rim 11 of the plate 9, before assembly, is conical so that it is of a diameter to pass into the cap, the flange being pressed flat to engage in the annular recess 7. The sealing washer or member may be of any other desired construction, the form illustrated forming the subject matter of a pending application.

I claim:

1. A stopper or closure comprising a cap having internal projections on the side wall, a neck on the container, inclined shoulders on the external surface of the neck with openings between the shoulders through which the said projections pass to engage under the shoulders, a sealing washer located in the cap and adapted to be gripped between the inside of the cap and the seating on the neck of the container when the cap is turned to engage the projections under the inclined shoulders, a spring located between the sealing washer and the cap to maintain the sealing washer on the neck should the cap slack back and relieve its clamping grip on the washer, and stops on the inclined shoulders, at the inner end adjacent the said openings between the shoulders, over which the said projections on the cap have to be moved against the pressure of said spring, to engage or disengage the projections over i Vthe said stops on the shoulders.

2. A stopper or closure comprisinga cap having internal projections on the side wall,

aneck on the container, inclined shouldersl on the external surface of the neck with openings between the shoulders through` which the said projections pass to engage under the shoulders, a sealing washer longitudinally movable in a recess in the internal wall of the cap, and adapted to be lclamped directly between the inside of the cap and the neck of the container when the cap is turned to engage the projections under the inclined shoulders, a spring located between the sealing washer and the cap to maintain the sealing washer on the neck should the cap slack back and relieve its clamping grip on the washer, stops on the inclined shoulders at the inner end adjacent the said openings between the shoulders over which the said projections on the cap have to be moved against the pressure of said spring, to engage or disengage the projections over the said stops on the shoulders, and stops on the rear end of the inclined shoulders adjacent the openings aforementioned to maintain the projections in register with these openings when the cap is to be removed.

In testimony whereof I have signed .this specification.` l

Birmingham, England, this 20th day of June, 1929. l

THOMAS ARTHUR STEVENS.

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