USRE17528E - Clean-out plug - Google Patents

Description

' Dec. 17; 1929.` -F J MERS vReimed Dee. 17, 1929 UNITEDA STATES PATENT oFFlcE FREDERICK .Tf EEESEELDEE AND PAUL EALzE, oELEoNIA, NEW JEEsEY, AssmNoEs 'ro n. a E. MANUFACTURING co., INC., oF LEONIA, NEW JERSEY, .a coEPoEA'rIoN or NEW JERSEY f originar No. 1,7o 2,s7s, dated This invention relates to improvements in clean out plugs and has particular referenceV to detachable plugs used in connection with clean outs on drains. Y

The ordinary clean out, used in connection with drains, consists of a body in the-nature thread, a brass plug. The body is usually made of iron and is caulked into the hub of the pipe or trap, leaving the brass plug'removable for the purpose of cleaning the drain or tray. In many cases the brass plug is lost or broken requiring its replacement. Since thejl threaded portions of the body and plug vary somewhat as to their diameters from other bodies and plugs, it becomes very dilicult to obtain the size of the newV plug new body for which the plug is furnished,

`but this replacement of the new body and found in clean out plugs or the like. With- Among the objects .therefore of this pres-V that will properly fit the body. In many cases it becomes necessary' toy remove they old body from the hub and to replace it with a plug involves much labor and expense.

entimprovement is to provide a plug which will fit into clean-out bodies of various diam- Y Whereb eters and which consequently will eliminate the-:necessity for replacing or renewing the body of the clean out when only a new plug is required. This Objectis attained by providing anew plug with an excessive taper holes o bodies of various diameters and to so form the thread or threaded surface portion of the new plug in a peculiar manner l adapting it to mate in a liquid and gas tight manner with the standard'thread formed on the'body.

With the foregoing and other vobjects `in view the invention consists in the arrangement and combination of parts hereinafter described and claimed, and'while the invention is not restricted to the exact details of.

-parts in' the several' views, and i'nfwhichs.-

CLEAN-our PLUG iron and preferably it will be sure to fit the threaded REISSUED- Figure 1 is a vertical sectional view of our improved clean out plug.

Fig. 2 is'an enlarged'sectional' or fragmentary diagram indicating the relation of the clean out plug threads to the hard metal body structure'.

February 19, 1929, S`eria1 No. 192,'357,-1ed May 18, 1927-. Application. for reissue filed May 7, 1929. Serial No. l361,288'. A

Referring now more specifically to the y drawings, we show at l0 a clean out plug comprising two main parts,-a core 11 of any suitable strong ri id metal such as cast ollow for cheapness and lightness, and a collar 12 of a softer metal such as lead, a'mixtu're of lead and ant-imony, or a mixture of lead and tin, the collar being molded or cast'upon the eripher'y of the core 11. The core is pre erably formed with suitable cavities of any desired formation or1 nature into which the molten softer metal of the collar will enter during `the process of formation of the .collar upon the core.

It will be notedt'hat the plug is so formed as to have a greater taper than is usually out intending to be unnecessarily limited to any particular dimensions ,in this regard, we

suggest that the amount of taper should be in the proportion of about three inches to twelve inches in length of the plug.

During the formation of the collar 12,'a thread14 iscast thereon. This thread is ofl peculiar formation in that'it is' of V-sha e generally speaking, sharp on top or on'tlie outside, but substantially flat on the bottom or inside at 15.'-

' 16 indicates al fragment of a body with which the 'plug is adapted .to co-operate.

These bodies are usually formed lwith standard threads of the same general character as found on the plug, that is to say of V-shape, but with sharp tops and bot-toms. Thev amount of taper .in the body opening is materiallv less than' thatof the plug' above de-` scribed, and may be zero, 4and vwhile the threads 17 of the bod are practically unform orstandard, the iameters of the o enings in the bodies are by no means uni o'rmor standard. It will be seen therefore. that our new plughaving an excessive taper may readily be driven Q1" turned in@ the Owning of the body 16 irrespective of a considerable variation in diameter of the 'body opening. As shown best in F ig. 2, when t 1e tapered plug is so driven into the body opening, the sharp pointed edges of threads 17 will bite into the flat bottoms 15 of soft metal of the plug collar for a number of turns and thereby insure a tight and reliable connection between the plug and the body, and, moreover, making a connection which is separable from time to ltime as may be requiredfor' clean out purposes and without disturbing the effective re lacement capability of the plug.

e claim:

1. The herein described fitting comprising a member having a uniform taper throughout the length thereof, the thread having a broad root of a different diameter than av thread to engage same, said member having a soft metal body to permit a new thread to be cut into the said root on engaging said member i with a hard metal threaded device, the taper of the thread of the soft metal member being greater than that of the other member, the pitch of the angles of the sides ofthe thread eing substantially the same for both memers. 2. A closure member` of the character set forth, including a core of hard metal, a layer of soft metal cast upon said core, said layer being threaded and havinur a substantially uniform taper throughout the length thereof, said thread having a broad root of a diierent i diametervthan that ofa thread engageable therewith, said broad root permitting a new thread to be cut into said root on engagement with a hard metal taper-threaded device, the taper of the first mentioned thread being 'greater' than that of the thread of said device, .the taper of the Afirst mentioned thread permitting the closure member to be used with hard metal threaded devices of different diameters.

3. In combination, a rust proof clean out plug, and threaded drainage fittings of varil ous sizes, the taper of the thread of the plug being considerably greater than that of the said fittings, and having approximately the same number of threads as the latter, for the purpose set forth.

In testimony whereof we aix our'signatures.

FREDERICK J. MERSFELDER.v PAUL BALZE.

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