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Publication numberUSRE18100 E
Publication typeGrant
Publication dateJun 16, 1931
Filing dateJul 8, 1835
Publication numberUS RE18100 E, US RE18100E, US-E-RE18100, USRE18100 E, USRE18100E
InventorsFrederick J. Mersfelder
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Clean out plug
US RE18100 E
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

F. J. MERSFELDER EFAL CLEAN OUT PLUG June 16, 1931.

Origmal Filed May 18. 192' Reissuecl June 16, 1931 v UNITED STATES PAH-3151.11. orrice FREDERICK J. MERBFELDEB AND PAUL BALZE, OI mew IEBSEY, ABBTGN OBB .lO M. & B. MANUFAGFUBING CO. INC, 01' LEONIA, NEW JERSEY, A OOBPORL'I'ION NEW JERSEY Original No. 1,702,878, dated February 19, 1829, Serial I'Il'o. 198,857, flledhln; 18,- 1987. BQl IIHG Io. 17,588, dated December 17, 1928, Serial No. 361,288, filed Kay 7, 1989, ilud subsequently became Beissue ill'o. 17,867, dated May 13, 1980, Serial 110. 438,885, fled larch S, 1930.- Thin application for reissue fled February 4, 1931, Serial No. 5133a.

This invention relates to im rovements in drainage clean out devices and as particular reference to detachable members used in connection with clean outs on drains.

5 The ordinary clean out, used in connection made of iron and 1s caulked into the hu Since the threaded portions of the body and.-

.20 it becomes necessary to remove the 01 of the pipe or trap, leaving the brass plug removable for the purpose of cleaning the drain or trap. In many cases the brass plug is lost or broken requiring its replacement.

plug vary somewhat as to their diameters from other bodies and plugs, it becomes very difficult to obtain the size of the new plugcases body from the hub and to replace it with a new body for which the lug is furnished, but this replacement of t e new body and plug involves much labor and expense.

Among the objects therefore of this present improvement is to provide a member such as a plug which will fit into threaded cleanout bodies of various diameters and which consequently will eliminate the necessity for replacing or renewing the body of the'clean out when on] anew plug is required. This object is attained by providing, for example, a new plu having a soft metal thread characterized y an excessive taper whereb the plug will fit threaded body openin 0 substantially ,varying diameters; an another object is to so form the thread or threaded surface portion of the new plug in an imthat will properly fit the body. In many' proved manner so that the normal yielding or conforming action of the soft metal may be increased. "p

With' the foregoing and other ob ects in view the invention consists in the arrange ment and combination of parts hereinafter described and claimed, and while the invention is not restricted to the exact details of construction disclosed or suggested herein, still for the purpose of illustrating a practical embodiment thereof, reference is had to the accompanying drawings in which hke reference characters designate the same parts I in the several views and in which- Figure 1 is a vertical sectional viewof our im roved clean out plug.

ig. 2 is an enlarged sectional or fragmentary diagram indicating the relation of the 7 clean out plug threads to the hard metal body structure.

Referring now more specifically to the drawings, weshow at 10 a member such as a clean out plug which may comprise one or more parts, such as a core 11 of any suitable strong rigid metal such as cast iron and preferably hollow' for cheapness and lightness, and a facing or collar 12 of a softer metal such as lead, a mixture of lead and antimony, or mixture of lead and tin, the collar being molded or cast or otherwise formed upon the periphery of the: core' 11. The core is preferably formed with suitable cavities of any desired shape into which the molten softer metal of the collar will enter during the processof formation of the collar upon the core. 7 l

It will be noted that the plug is so formed as to have a substantially greater taper than is usually found in clean out plugs or the like. Without 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 lengthpf the plu While the plug'may be of any desired len it is preferably relatively short so as not to obstruct the interior of the clean-out body, and the number of threads of the lug may consequently beupproximately equa to those .on the body.

During he. thread :14 may be cast thereon. This thread may be ofany desired formation, but it is preferably of V-sha e, sharp somewhat on top or on the outsi e, but substantially flat on the bottom or inside at 15. w

16 indicates a fragment of a suitable hard metal body with which the plug is adapted to co-operate. These bodies are usually formed with suitable threads of the same general character as foulld on' the plug, that 1s to say, of V-shape, and with relatively formation of the collar 12, a

sharp to bod all taper in t e y opening is materi y less than that of the plu above described, and ma be zero, and whi e the threads 17 of the b y are practically uniform, the diameters of the openings in the bodies are by no means uniform or standard. It will be seen therefore that our new plug having an excessive taper may readily be driven or turned into the o ening of the body 16 irrespective of a considerable variation in diameter of the body opening. The soft metal component of the plug has a wiping or yielding action with the hard metal of the drainage fitting, causing a tight joint even though a close engagement is afforded at only a small portion of the threaded surface. The plug taper assures a constantly increasing pressure at the tightly mating threads, affording a uniformly increasing combined pressure and wiping engagement, and the latter may increase into a yielding and intimate surface conforming condition. If a flat root be used, when the tapered plug is so driven into the body opening, the sharp pointed edges of the threads 17 will bite into the fiat bottoms 15 of 'so 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 time as ma be required for clean-out purposes and wit out disturbing the efiective replacement capability of the plug. In either case, every time that our plug, upon removal, is reinserted into the clean-out body, the actions above mentioned may occur, in lesser degree than at the first engagement, but sufficiently to assure a perfeet and in fact a constantly improved joint.

The invention finds especial advantage with reference to plumbing drainage fittings, as these are not generally made with standard size threads; in other words, fittings which would otherwise be of the same size, differ sufliciently in thread diameter so that the ordinary plug for one fitting will not engage another fitting. ated by this invention, is indicative of one principle of our invention.

We claim:

1. The herein described fitting comprising a member havin a uniform taper throughout the length t ereof, the thread having a broad root of a diflerent diameter than a thread to engage same, said member having a soft metal 0 y to permit a new thread to be cut' into the said root on enga 'ng said P member with a hard metal threa ed member, 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 of the threa being substantially the same for both members.

2. A closure member of the character set forth, including a core of hard metal, a layer s and The amount of of soft metal cast u That difliculty, which is obvion said core, said layer being threaded an havin a substantially uniform taper throughout t e len h thereof, said thread having a broad root 0 a different diameter than that of a thread of a hard metal t-a er threaded device adapted to be engage therewith, said broad root permitting a new thread to be cut into said root on engagement with said hard metal taper-threaded device the taper of the first mentioned thread being greater than that of the thread of said device, and permitting the closure member to be used with hard metal threaded devices of different diameters.

3. A clean-out plug for drainage fittings having openings of substantially varying sizes to receive the plug, said plug having an outer threaded surface having a uni orm taper greater in a substantial degree than that of the thread of the fittings, the threaded surface of the plug having a soft yielding metal component engageable under increasing pressure with successive threads of a portion of a threaded fitting opening to afford a liquid ti ht engagement with the fitting, said taper 0 the plug being sufiicient to cause only a relatively small section of the lug to en age in said openings of substantiailly varymg sizes.

4. In combination, a hard metal drainage fitting member having a threaded opening and a-plug member having an outer threaded surface to engage in said opening, one of said members havin a soft metal layer along which its threa extends so that the entire thread of said one member has a yielding surface, the thread of one of said members having such substantially different taper than the thread of the other member, that only a fractional section of the plug is adapted to engage in said opening or in similar threaded openings of various sizes.

5. A member for threadedly en aging a threaded draina e fitting, said mem r havin a soft metal t read having a substantially uniform taper greater in a substantial dees than that of the fitting thread said soft metal thread having a flat root to be cut into liy the thread of the fitting.

6, ncombination,aplu havin atapered threaded outer surface an a mem r havin a tapered threaded opening receivin' sai plug, said surface having approximatefiy the same number of threads as said member, the taper of the threaded surface of said plug being so substantially different than the tar of said opening, that onl a fractional section of the plug 15 adapte to engage in said threaded opening or in similar threaded openings of various sizes, whereby said plu may be used with members having threads openings of substantially varying sizes.

7. A clean-out plug having a threaded out- 0 ening for receiving said plug the ta er of tlie threaded surface of said plug beiiig so I sufficiently greater than the taper of said o ening that onlya fractional section of the p ug may be eng ed with said opening or wit 1 similar threa ed drainage openings of various sizes.

8. A clean-out plug havin threaded soft metal outer sur ace adapted to engage with a hard metal drainage fitting having'a'tapered threaded o ning, and the plug having approximately t e same number of threads as the latter, the taper-of the thread of the plug being substantlally greater than that of the 531d fittin opening to cause only a fractional part 0 the plug to engage in said opening or in similaropenmgs of various sizes, whereby said plug may e used with fittings of various sizes.

9. A member having a tapered threaded soft metal surface for an element having a tapered threaded hard metal portion adapted to engage the member and make tight engagement therewith only at the en aging threads, the taper of the threaded sur ace of said member being so different to a'large degree from thetaper of said portion that only a fractional section of the member is engageable with the threaded element portion or with similar threaded element portions of various sizes.

10. A member having a tapered threaded soft metal surface for an element having a tapered threaded hard metal portion adapted toengage the member and make tight en gagement therewith only at the en aging threads, the ta er of the threaded sur ace of said member eing so difi'erent to a large degree from the taper of the said portion that on y a fractional section of the member is engageable with threaded element portions of various sizes, the thread of the member having a fiat root to be cut into by the hard metal thread of the element.

In testimony whereof we aflix our signatures.

PAUL BALZE.

FREDERICK J. MERSFELDER.

a tapered DISCLAIMER Re. 18,100.Fredericlc J. Mersfelder and Paul Balze, Leonia, N. J. CLEAN OUT PLUG. Patent dated June 16, 1931. Disclaimer filed July 8, 1935, by the assignee, M. d? B. Manufacturing 00., Inc.

Hereby enters this disclaimer to claims 6 and 7 in said patent, which are in the following words, to wit:

6. In combination, a plu having a tapered threaded outer surface and a member having a tapered threa ed opening receiving said plug, said surface having approximately the same number of threads as said member, the taper of the threaded surface of said plug being so substantially different than the taper of said opening, that only a fractional section of the plug is adapted to engage in said threaded opening or in similar threaded openings of various sizes, whereby said plug may be used with members having threaded openings of substantially varyin sizes.

"7. A clean-out plug having a threaded outer surface a apted to be enga ed with a drainage fitting having a tapered threaded opening for receivin said plug, t e taper of the threaded surface of said plug being so sufficiently greater t an the taper of said opening that only a fractional section of the plug may be engaged with said opening or with similar threaded drainage openings of various sizes.

[Official Gazette July 30, 1935.]

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7694835Apr 13, 2010Rexam Closures And Containers Inc.Drafted neck finish having angled thread face and closure package