Патент USA US2137999код для вставки
Nov. 29, 1938. D. w. cuéns v r' 2,137,999 SEALIISG CAP FOR BARREL BUSHING AND. SCREW PLUG ASSEMBLIES Filed July 6, 1936 v 2 Sheets-Sheet 1 1 3/5 /Z /5 / INVENTOR; /ATTORNEY. Nov. 29, 1938. D. w‘ cum-1s 2,137,999 SEALING CAP FOR BARREL BUSHING AND SCREW P‘LUG ASSEMBL-LES Filed July 6, 1936 2 Sheets-Sheet 2 /7 o ti ATTORNEY. Patented Nov. 29, 1938 I 2,137,999 PATENT OFFICE UNITED STATES 2,137,999 SEALING CAP FOR BARREL BUSHING AND SCREW PLUG ASSEMBLIES David W. Curtis, St. Louis, Mo., assignor to Thomas Connors, St. Louis, Mo. Application July 6, 1936, Serial No. 89,160 7 Claims. (Cl. 220—39) This invention relates, in general, to metallic barrels, and like containers ?tted for the storage and transportation of oils, or other liquids, and semi-liquids, and, it has particular reference to C21 means for sealing the outer end of a closure bush ing having a ?lling and/or discharge opening and provided with a closure plug. The object of my invention is the provision of means comprising a snap-on sealing cap for 10 disposition over a barrel bushing and plug there to spread the free ends of the skirt ?ngers. Fig. 5 is a fragmentary bottom plan view of a sealing cap with the gripping skirt ?ngers ex 10 panded and the sleeve portions thereof in sec and, which will automatically lock itself to the tional elevation to show one form of split circular ?exibly resilient locking member carried thereby of from the bushing, unless forced, and, in such 15 instance be readily detectable. V A further object of the invention resides in a sealing cap structure having a ?exibly resilient central disc portion bulged to the lower side of a plane when the cap is open, and yieldable, un der pressure, said cap having skirt means gripped to the barrel bushing when the central disc por tion is bulged to the upper side of the plane and said skirt means beingprovided with a spring wire, one end of which is anchored to a section of the skirt means and the other end free so that when the skirt means is contracted the free end of the spring wire will lock against an adjacent portion of the skirt means and thereby prevent expansion of the sealing cap skirt or its removal 30 from a barrel bushing without the use of tools to dis?gure the sealing cap. Therefore, an object of the invention is the provision of a snap-on sealing cap, which can be applied to a barrel bushing without the use 35 of tools of any kind, and when once positioned, cannot be removed without dis?guring portions of the cap with some kind of a tool which renders the cap readily detectable as having been tam pered with. ' A still further object of the invention is the provision of a sealing cap for barrel bushing and screw plug assembly, which possesses advantages in points of simplicity and efficiency, and, at the same time proves itself comparatively inexpen 45 sive in cost of manufacture. With the above and other objects in view, which will be apparent hereinafter, the invention 40 consists in the novel features of construction, ar- ' rangement and combination of parts hereinafter more fully described and ?nally pointed out in the claims hereto appended. Referring to the accompanying drawings form ing a part of this speci?cation, wherein like char acters of reference denote similar parts through 5 99 ing the top portion thereof bulged downwardly for without the use of any tools, or machines, bushing in a manner as to prevent removal there 2 Fig. 2 is a top plan view of the invention, with a portion of the sealing cap top broken away. Fig. 3 is a side elevation of the sealing cap mounted to cover the barrel bushing, bead and Cl screw plug carried by the bushing. Fig. 4 is a sectional view of the sealing cap show in its unlocked or expanded position. Fig. 6 is a view similar to Fig. 5, but showing 15 the skirt ?ngers in closed position and the free end of the locking member as in locked engage ment with one end of one of the skirt ?ngers sleeves to prevent the skirt ?ngers from spread ing. Fig. 7 is a top plan view of the split circular ?exible resilient locking member. Referring, now, to the drawings, a wall of a metallic container, or a barrel head I is shown provided with an opening, and, to which is se cured a suitable bushing, one type of which struc ture is clearly de?ned in my co-pending appli cation, Serial Number 82,598, and, consists, brief ly, of an internally screw threaded bushing mem ber 2 having an annular ?ange 3 projecting downwardly from the inner lower edge thereof. and crimped to a horizontal ?ange 4 projecting inwardly from a neck 5 which projects outwardly from the barrel head I. The bushing member 2 is shown as being provided at any desired posi tion on its outer peripheral face, with a suit able annular groove or recess 6 below a bead 1, and the bushing is also shown as provided with a suitable nut 8 provided with suitable wrench engaging means carried by the internal screw 40 threads of the bushing and serving as a closure for the ?lling and/or discharge opening. The sealing cap, or closure member for dis position over'the barrel bushing and the screw plug therefor will now be described. _ The sealing cap is shown as comprising a cen tral ?exibly resilient disc portion 9 normally bulged to one side of a plane and from the edge portion thereof, there is a skirt portion consist ing of a series of gripping ?ngers l0 formed by slitting the cap material, as at H. The lower edges 'of skirt ?ngers ill are curved inwardly to provide sleeves I2 for a suitable split circular ?exibly resilient locking member !3, such, for instance, as a spring Wire or band to pass 55 out the several views: Fig. 1 is a sectional view of barrel bushing, screw plug and sealing cap assembly embodying the features of my invention, the sealing cap be through. One end of the locking member I3 is suitably anchored, as at I4, to the sleeve portion ing shown in closed and locked position. so that when the central disc portion of the seal of one of the skirt ?ngers l0 and the opposite end of the member I 3 is free to move circumferentially ‘2 ‘ - 2,137,999 ing cap is bulged upwardly beyond a plane the skirt ?ngers Ill at their free ends will move in wardly toward the center of the sealing cap, thereby reducing the diameter of the locking Cl member l3 and the mouth of the sealing cap. In so doing, the free end of the locking member l3 will slide out of one end of the sleeve portion I2 of a skirt ?nger l0 adjacent or next to the skirt ?nger H] to which the opposite end of the locking 10 member I 3 is anchored, and, as the free end of the locking member l3 moves out of the end of the sleeve portion of said skirt ?nger the hooked end l5 thereof engages the end I 6 of the sleeve to lock the snap-on sealing cap in position on the bushing over the plug therein. When thus locked in posi tion, over the end of the bushing, it cannot bere moved without dis?guring the ?ngers with a tool of some kind, and, in such an instance, it can be readily detected that the sealing cap has been 20 tampered with. The sealing cap is applied to the bushing after the central disc portion 9 of the cap is bulged downwardly, which spreads or expands the free ends of the skirt ?ngers IE! to increase the size of the mouth of the cap to a diameter to slip over the bead ‘I on the bushing. Now, so positioned, to close the skirt ?ngers H] around the bushing and bead, one merely applies ?nger pressure to the skirt ?ngers and the sleeve portions of the skirt 30 ?ngers will snap into engagement with the groove 6 on the outer bushing wall, thereby locking the cap in position over the bushing, bead and screw plug. This closing function of ‘the cap draws the edge portion of the central disc portion of the 35 sealing cap down tightly against a suitable gasket ll disposed between the cap disc portion and the outer end face of bushing adjacent the bushing bead, and effects a leak proof joint therebetween. The sealing cap can be snapped into'locked 40 position on the‘bushing,.but it cannot be removed ' without tools to dis?gure the skirt ?ngers. From the foregoing description, it is apparent that the snap-on sealing cap can be used in con nection with barrel head or body bushings of 45 other design than that disclosed herein, or in my co-pending application as long as the bushing is provided with a bushing bead and groove or re cess therebelow to accommodate the inwardly curved or inwardly turned free ends of the sealing 50 cap skirt ?ngers, and when of the latter type the bushing plug has a portion to prevent the down ward bulging of the central portion of the cap when it is once applied to the bushing. The spring wire locking means in the ?rst 55 described form of the invention prevents the cen tral disc portion of the sealing cap from being bulged downwardly and removed from the bush ing when once applied thereto and the plug por tion in the modi?ed form of the invention pre~ vents the central disc portion of the sealing cap from being bulged downwardly and removed from the bushing when once applied thereto. The many advantages of the herein described invention will readily suggest themselves to those 65 skilled in' the art to which it appertains. From the foregoing description, it is evident that a simple device for this purpose has been dis closed, but it is to‘ be understood that I do not desire to restrict, or limit myself to the very de tails of the construction shown and described, which is merely illustrative, it being obvious that changes, not involving the exercise of invention, may be made without con?icting or departing from the spirit of the invention within the scope 75 of the appended claims. What I claim is: 1. The combination with a metal barrel ?tted witha bushing having a peripheral-bead and pro vided with a screw plug, of a snap~on sealing cap therefor having a series of contractible skirt ?n gers to engage the bushing below the bead and circumferentially contractible means engaging the inner walls of the ?ngers for locking the cap in position. »2. A sealing cap of the class described compris 10 ing a ?exibly resilient body portion, a series of expandible and contractible skirt ?ngers, and circumferentially contractible means connected to the inner surface of the skirt ?ngers to lock the skirt ?ngers in contracted position. 15 3. A sealing cap of the class described compris ing a ?exibly resilient body portion, a series of expandible and contractible skirt ?ngers, ‘the lower ends of the skirt ?ngers being rolled in wardly, a split ?exibly resilient wire ring secured 20 at one end to one of the skirt ?ngers and mounted in the rolled lower ends of the other ?ngers, a hook formed at the opposite end of the split ring adapted for engagement with one of the side edges of the rolled lower ends of the skirt ?nger ad jacent the ?nger to which the ring is secured'for locking the skirt ?ngers in contracted position. 4:. In combination with a container plug bush ing having an exterior circumferential groove, of a sealing cap adapted to be snapped into locked position on the bushing, said cap comprising a ?exible resilient body portion and a series of ex— pandible and contractible skirt ?ngers which when in their expanded position permit the cap to be mounted on the bushing, the lower edges of the skirt ?ngers being directed inwardly, and circumferentially expandible and contractible means carried by the skirt ?ngers on their inner faces thereof for locking the skirt ?ngers in their contracted position with vthe inwardly directed Ad ing groove. lower ends of the skirt ?ngers seated'in the bush- " ' 5. In combination with a snap-on sealing cap having a ?exibly resilient ‘body portion and a series of expandible and contractible skirt ?n gers, of circumferentially expandible and con tractible means'connected ‘to the inner faces of the skirt ?ngers adjacent the lower ends thereof to lock the skirt ?ngers in contracted position. 6. The combination with a metal barrel ?tted with a bushing and ascrewplug therefor, of a seal ing cap adapted to be snapped into position over the bushing and screw plug, said cap including a. series of expandible and contractible skirt ?n gers, and circumferentially contractible means connected to the inner surface of the ?ngers ‘to lock the ?ngers in contracted position for locking the cap against removal on the bushing without dis?guring the cap. '7. In a structure of theclass described, a con tainer ?tted with a bushing secured at its lower end to the container, said bushing-having an outer 550 60 peripheral head by grooving the bushing, a plug carried by the bushing, a sealing cap snapped into position and covering the outer end of the bush 65 ing and the plug, the cap including a series of expandible and contractible skirt ?ngers with the free lower edges thereof engageable in the bushing groove when a central disc portion of the cap is bulged upwardly, and circumferentially contracti ble means connected on the inner surface of the ?ngers to lock the ?ngers in contracted posi tion and to prevent the central disc portion of the cap being bulged downwardly. ' DAVID W. CURTIS. 70 '