Патент USA US2135351код для вставки
‘Nov. 1, 1938. 2,135,351 C. H. NEHLS LOCKING CLOSURE Filed Dec. 11, 1936 FIG.5. ‘ INVENTOR. CHARLES H. NEHLS BY ‘ ATTORNEY 2,135,351 Patented Nov. 1, 1938 UNITED STATES PATENT OFFICE 2,135,351 LOCKING CLOSURE Charles H. Nehls, Detroit, Mich. Application December 11, 1936, Serial No. 115,298' 2 Claims. (01. 70—165) This invention relates to locking closures, and especially concerns covers for tanks and other 5 , receptacles. An important aim of the invention is to provide an improved locking cap, incor porating mechanism of simple, ‘secure and tamper-proof character rendering the entire cap body, and all accessible portions thereof, freely rotatable when the cap is locked, such rotatabil ity preventing removal of the cap. - A further object is the provision of such a lock ing cover, the working parts of which are effec tively protected against the entrance of mois ture, the danger of freezing and sticking of the parts in cold weather being thereby obviated. Another object of the invention is the provision 15 of such a cap adapted to be incorporated in a design of especially neat and attractive appear— ance. A further object is to provide in such a locking cap a body portion carrying the lock so arranged that when the cover is in place upon a 2O container, the body portion may be clutched and released with respect to a concealed and inacces sible closure portion extending into the opening 10 to be closed. . A further object is the provision of improved and simpli?ed locking means for such caps, as well as improvement of the means for rotatably connecting the closure and cap portions. Other objects and advantages will be apparent from the following description wherein reference 3 O is made to the accompanying, drawing illustrat ing a preferred embodiment of my invention, and wherein similar reference numerals desig nate similar parts throughout the several views. In the drawing: Figure 1 is a bottom view of a cap incorporat ing the principles of this invention and suitable for use as a tank cover or the like. Figure 2 is a diametric cross-section thereof. Figures 3 and 4 are horizontal sections taken 4 0 substantially on the lines 3—3 and 4—-4 respec tively of Figure 2 and looking in the direction of the arrows. _ Figure 5 is a view in diametric cross-section '- and partly broken away, taken substantially at right angles to the plane of Figure 2. Figure 6 is a perspective view of the closure section, partly broken away and with the pivotal attaching means removed but shown in position 50 ready for insertion. _ Figure 7 is a perspective view of the interior of the closure portion, one wall thereof being broken away; and Figure 8 is a perspective view of the interior of . the cap portion, with the closure portion removed. 55 Referring now to the drawing, which shows an embodiment of the invention especially suitable for the ?ller openings of fuel tanks, such as automobile petrol tanks and the like, reference character I0 designates the body portion of the cap, such body portion being shown as of more or . less conventional belled external contour, cen trally carrying an integrally cast downwardly projecting barrel portion l2 which constitutes the cylinder for the plug l5 of a tumbler-lock, and 10 also rotatably supports a cup-shaped closure member 35, ?tted over the bottom of the barrel. The plug is exposed at the top of the cap to receive a key, in the conventional manner, but a protecting key-hole cover I‘! pivoted to the top‘ of 15 the cap body and adapted to seat upon a ring gasket 18 encircling the plug is provided to seal the lock cylinder against the access of moisture from the outside, and swingable laterally to afford access to the key-hole. The key-hole cover is 20 shown pivotally attached to the cap body H] by means of a downwardly projecting boss 59 ex tending into the top of a bore (undesignated) in the cylinder portion l2.. A pin or screw, as 2|, carried by the boss, projects from the bottom of 25 the barrel through the counterbored lower end 32 of the bore and into the boss 19. In the counterboredportion 32 and beneath the head of the screw 2| a compression spring 23 encircling the screw is trapped, such spring acting to hold 30 the key-hole cover I ‘l yieldably seated against the gasket, which is somewhat depressed below the remainder of the top of the cap body, to tend to center the small swinging cover. In the periphery of the barrel portion l2 near 35 its top a groove 26 is provided, and the closure member is shown rotatably attached to the bar-, rel by means of key elements 31 projected through slots, as 38, inrthe sides of the closure and into such groove 26 in the barrel. The body and bar rel are preferably integrally cast, and the keys may be provided with struck-up portions, as 39, to increase the friction of their engagement with the slotted portions of. the closure member. When fully inserted, the extremities of the keys project from the closure into the belled interior of the cover, such projecting portions being perfo rated to enable their removal by means of a suitable tool, but only when the inside of the cap is accessible. 50 From the ?at bottom surface of the barrel 2. pair of guides 25 project downwardly in parallel relation to form a slideway for the radially shift able lock bolt or detent 30. The bolt may be stamped of relatively heavy sheet metal, and its 2. 2,135,351 shape and arrangement are best shown in Figures 3 and 8. As there indicated, it carries an inte gral pointed extremity 3| which is operative to lock together the body and closure portions of the cover and is provided‘with a back taper, for The bolt c a purpose which will presently appear. is projectible laterally from the bottom of the ‘ barrel I2 to engage between detent teeth 50 car ried by the body, from which teeth it may be 10 retracted, to free the body portion ,forlindepend ent rotation, thus, preventing removal‘ iof;the cap. The enlarged rear portion of the bolt is retained cap body, and that the greater the effort exerted upon the cap, the more ?rmly the bolt is pro jected, accidental release oi the parts being t-hus impossible, while when the bolt is retracted, its point lies inside and free of the teeth 50, so that the entire cap body and barrel may turn freely with respect to the closure member 35, such posi tion of the bolt correspending to the locked posi tion of the cap. ' ‘ t ' , Preferably the closurerportionaii? is so designed 10 'asg‘tor?tv deeply into theneck oropening of the container to which the cap is applied, to such between‘ the guides 25 and actuable by an eccen‘ extent, for example, as to seat the gasket 55 tric pin l6 projecting from the lower end of the , against the top of the neck or container, while 15 lock plug into a slot 32 in the bolt. It Will: be appreciated that when the lock plug-is rotated, by means of a suitably bitted key, the boltor the cap body extends down the outside of. the neck’ 15 ,or lies-close. tor-the top of the container, making the closure portion inaccessible, and, by reason detent may be reciprocated to project and retract , ofthe free rotatabil-ityof the cap body when the the same. 20 , l The inwardly projecting detent teeth 50 car— ried:by the cupped’closure memberv 35ware ‘also integrally cast in place; and ‘arranged; at thev 1111' side, bottom corner of the cup‘, as best shown in Figure 7. Each tooth has-parallel ‘sides, impart; ing" an outward taper to the space between any two thereof. As shown in Figure 3,“ such outward taper cooperates with the, back taper‘ of bolt por- , device isllocked, irremovable save by the use of a proper key. , ' What I claim is:‘ 20 , 1.‘ A locking cover construction comprising a cuppedclcsure member, a body member rotata~ bly. connected to the closure member, locking meanscarriedby and rotatable with the body 25' member, including; a, detent movable into'and out of a position in detainingengagement with tion 3] in such fashion that. torque applied to the ‘both-of said members, said, bodyimeinber having cap body tends, by forcing fthe‘sides of the bolt a portion rotatably extending into the cupped and adjacent tooth together (when the bolt- is closure, member, said: detent being slidably 305 projected), to urge the bolt-outwardly, thus in mounted between the bottom of said LPOI'tlOI‘l and suring, its maintenance in projectedposition. the bottom of the closure member, inside the From the outer surface of the closure member latter and outside the former, cooperating abut; near the bottom, ‘extend holding lug portions 4|, _ment, portions between which the-‘detent is slida which constitute the projecting. ends of‘a trans‘ ble, carried both by said'body portion which pro versely disposed sheet. metal strip 40, centrally jects into the cupped closure member and by the carried by the closurenear thebottom thereof and, cupped closure member, said detent being mova housed in an under-cut slot 42. in the bottom of_ such closure member, the slot being'closed and the’ lug strip held in place a conform-ably ' shapedslide 43 ?tted‘into the slot from one end.‘ The lug portions 41 are adapted to~cooperate with bayonet-type locking portions (unshown) r carried atrthe neck .or opening-of the receptacle to which the cover, is-to bergattached, although it will be appreciated. that,‘ screw-type or other suitable holding portions might, be provided. The lug strip 40' also may act as'a spring'to ihold slide 43 in place, a central boss, as M, struck up 5053 slightly from the surface of‘ the- strip 40‘ for ble to and from bridging relation with the abut ment portions to. connectland’ disconnect the body and closure members, external lug-forming \ 40 means comprising a transverse member’ carried by and'projecting- at its: ends from the closure member, said transverse-member also being ‘ar ranged at least partly between said closure meme her and said portioniof the body. member which projectszthereinto, tween saiddetent urging one against other against the and. a spring arranged be and’ transverse member for, said‘ body member and ‘the closure 'member, and also urging said body and ‘closure members longitudi 50 engagement with'an appropriately arrangedde- V nally with relation to each other; pression (undesignated) in the slide, acting as a positive lock to retain the slide, as well as to ‘pro vide a centering pocket uponthe other side of -‘.-j:the» strip for the apex of an inverted conical , spring 45trappedin an opening», as 46, ingthe bottom of the’ closure member,’ The opening’ connects slide-way 42' with the interior, and a 'cup-ped spring retainer, slidably ?tted. in such 60 opening, covers the base of the spring vand bears upwardly againstv the bol-tBIl, holding the parts against rattling and serving as a slide for; the bolt. It will also be seen that when the bolt is pro jected, the closure member, ,35-and bayonet look 65 ing portions 40- may be turned as a unit with the ' 2. In a lockable container closure of- the type having an external belied body freely rotatable when the" closure is locked, a-cupped closure ele ment rotatably attached to the-body,~said body 55 having a portion rotatably ?tted‘into the closure element, said closure element having a substan tially cylindrical wall and an outwardly extending thickened abutmentportion at its top, within the belled-body, forming a shoulder adapted to act 60 as an abutment for- sealing means, and keying " meansialso extendingthrough said thickened por tion to rotatably join the cuppedclosure portion to saidinter?tted portion ofthe body. ' ' i Q CHARLES H. NEHLS.