US2583300A - Composite drain fitting - Google Patents

Description

Jan. 22, 1952 K. R. MARCUSSEN COMPOSITE DRAIN FITTING 2 SHEETS-SHEET 1 Filed Feb. 15, 1948 Jan- 22, 1 5 K. R. MARCUSSEN COMPOSITE DRAIN FITTING 2 SHEETS-SHEET 2 Filed Feb. 15, 1948 Patented Jan. 22, 1952 UNITED STATES PATENT OFFICE Kenneth RwMarcussen, Waterbury, -Conn., as-

signorzto Chase Brass &' Copper Co. 111001110? rated, Waterliury,.. Conn., a corporation ApplicationFel ruary 13, 1948, Syria] No. 8,199

3;Cl aims,: (Cl. 285-37'):

The'present' invention relates to improvements in'drain-fittings for sinks and the like and relates more particularly-to composite drain-fittings; as will beapparent from the following, considered in conjunction with the accompanying drawings.

Oneof the'main objects of the present invention-isto provide a superior composite drain-fitting; comprising two substantially cup-shaped shells or membersinterfitting and permanently securedtogetherin a simple, effective and lowcost manner.

Another object of the present invention isto provide a superior drain-fitting of the character referred to; comprising two substantially cupshaped shells or members interfitted and permanently secured together in such manner as to effectively resist the strains of installation, use, and removal without causing a separation ofthe two main members referred tof' A further object of the present invention is to provide a superior composite'drain-fitting for sinks, comprising the two shellsor members above referred to and in which one member is composed of stainless steeland'the other member of brass or similar material, and in which thestainless steel. part forms a shield for the brass or equivaient, part to, protect the same against abrasive actionincident: to cleaning, while the, brass or equivalent member is so assembled with the stainless, steel member as toeifectively reinforce the sameand provideconvenient means for receiving exterior threads required. for the leak-proofassembly of the composite fitting with: a sink or the like;

I Still another object. of the, present inventionis to, .provide. a .s.uperior method of manufacture whereby superior composite drain-fittings] may be produced economically.

Withthe above and other objects in View, as wilhappear to those skilled in mean; from the present disclosure, this invention includes all features in the said disclosurewhich are novel over the prior art,

In the accompanying drawings, in which certain modes of v carrying. out the present invention are shown for illustrative purposes:

Fig. 1 is a sectionalized perspective view of an inner shellsuitable for use in connection" with the presentinvention and shown prior to its assembly'with an outer shell;

.Fig. 2 .isasimilar view of anouter shellsuitable for usein. connection with the present invention;

Fig, 3 is. aviewin side; elevation of the outer shell;

Fig. 4 is -an enlarged fragmentarysectional view takenon the line 4- l' of'Figi'Z;

Fig. 5 is a transversesectional ViEWjOf' thB as sembly, comprising the inner shell andtheouter shell shown prior to their being anchored-to gather;

Fig." 6 is'a transverse sectional view taken on the line 6$ of Fig. 5;

' Fig; 7 is an enlarged scalesectional view of the area" indicated by 'the dotted lines "I- in'Fig. 6'1

Fig. '8' is a 'view similar to Fig; 6 butpshowing' the inner shell and the outer shell anchored together by deepening of the clearance-groovesin the outer'shell; Fig. 9 is a fragmentary sectional view ofithe portion of the structure, of Fig. 8indicatd-bytl'ie broken line 9 ofE'ig, 8; and Fig. 10' is a transversesectional view'takenon the line I0-l0 of"Fig. 8.

The composite drain-fitting chosen for illustration in the accompanying 'dra'wings in order'to make clear a preferred embodiment of the pres ent invention, includes a substantially cupshaped inner shell generally designated by the reference character l5 anda complementalsubstantially cup-shaped outer shell generally designated by the reference character I6; The saidinner shell ispreferably made of-stainl'esssteel, though other materialsmay be employed; while thesaid outer shell [5' ispre'ferably formed-of brass or other suitable'and readily deformable material. s

'I'hef'innershell 15 abovereferred to maybe readily produced by'adr'awing operation stridineludes j an V annular seating-flange l1 extending outwardly at its-upperend, a side-or latralv'vall I8, an inclined bottom wall IS'an-d a neck 28:

' At a point intermediate-the seating=fiange l1 andthe sloping bottomwall l9, the side; wan i 8 of the innerfishell member is" displacdjto provid iia substantially-annular shoulder 2i as is shown. Preferably, the lower end of theflneck 2B is'provided with" an integral transverse-web 22 w-hich'intheinstance Ishow nhasthree slender radial arms-so as to provide maximum degree of clearance for the passage'of water 'b'etween the said arms.

At four (more orless) equidistant points, .the sidewalllt of the inner shellemember'ifiaiscdisr placedinwardly t0;pr.ovide acorrespondin'g humof u st nt we ticM .couplinsrsr ovssuit which at. theirlower ends intersect the. slopin bottom wall IQ of, the said inner shell..

Th u e sh 1 th me efe e o. nc ude x v 3 and an externally-threaded neck 26 designed to accommodate within itself the shorter neck 29 of the said inner shell I5.

At four (more or less) equidistant points, the side wall 24 of the outer shell I6 is inwardly displaced to provide in its outer face a corresponding number of substantially-vertical clearancegrooves 21, each" of which results in the formation of an inwardly-projecting coupling-rib 28 designed and adapted to respectively fit into the coupling-grooves 23 formed in the inner shell I5 as before described.

The clearance-grooves 21 in the exterior of'the side wall 24 of the outer shell I6 intersect at their lower ends the sloping bottom wall 25 and are of an initial depth sufricient to cause their innermost portions to lie well inwardly of the roots of threads 29 formed upon the exterior of the side wall 24 for purposes as will hereinafter appear. 3

The outer shell I6 may be conveniently drawn up from heavy-gauge brass so as to simultaneously produce the clearance-grooves 2'! and coupling-ribs 28. Following the drawing up of the outer shell and the formation of its clearancegrooves 27 and coupling-ribs 28, the side wall 24 is then provided with the exterior threads 29. In cutting the threads 29, the chips resulting therefrom will definitely terminate at each of the clearance-grooves 21, thereby facilitating the rapid and accurate formation of the said threads 29.

The exterior dimension of the side wall I8, bottom wall I9 and neck 29 of the inner shell I5 are such as to permit the said inner shell to be inserted with a light press or force fit into the outer shell I9 so that the parts may readily assume the positions in which they are shown in Figs. 5, 6 and 7 prior to being firmly united, in a manner as will hereinafter appear.

Following the assembly of the inner and outer shells I5 and I6 as above described and as indicated in Figs. 5, 6 and 7, the clearance-grooves 2'! in the outer shell I6 are deepened by means of rollers or other suitable tools to thus bring the parts into the condition in which they are shown in Figs. 8, 9 and 10.

The deepening of the clearance-grooves 21 in the outer shell I6 as above described, will, of course, simultaneously extend the coupling-ribs 28 further inwardly and cause the latter to measurably distort the coupling-grooves 23 in the inner shell I5.. Furthermore, the action referred to will stretch the entire side wall 24 of the said outer shell into tight engagement with the outer periphery of the side wall I8 of the inner shell I5, to thereby firmly interlock the two said shells not only against relative turning movement but also against relative axial movement.

It will be apparent from the foregoing that by forming the clearance-grooves 21 and hence also the coupling-ribs 28 in the outer shellmember prior to the formation of the threads 29 thereon, the cutting operation is greatly facilitated, owing to the fact that the chips will definitely break off at each of said clearancegrooves.

It will further be apparent that while the inner and outer shells I5 and I5 may be initially assembled with but a moderate pressure, the subsequent deepening of the clearance-grooves 21 in the outer shell I6 serves not only to force the coupling-ribs 28 more tightly into the couplinggrooves 23 in the inner shell, but also firmly engages the inner periphery of the side wall 4 24 of the said outer shell with the outer periphcry of the side wall I8 of the inner shell I5, in the manner illustrated in Figs. 8, 9 and 10.

Thus, the two complemental shell-members I5 and I6 are so firmly united against both relative rotary movement and axial movement as to virtually constitute a unitary structure.

, The invention may be carried out in other specific ways than those herein set forth without departing from the spirit and essential characteristics of the invention, and the present embodiments are, therefore to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

I claim:

1. A composite drain fitting, comprising inner and outer cup-shaped shells of which said outer shell is of malleable metal and both shells have substantially cylindrical interfitted walls, respectively, said cylindrical wall of the inner shell having an outer longitudinal groove and a portion of said cylindrical wall of the outer shell extending inwardly to form a tongue which is in registry with, but initially at least in part spaced from, said groove, and said cylindrical wall of the outer shell being held uniformly contracted in tight clamping engagement with said cylindrical wall of the inner shell by further permanent inward deformation of said tongue into the groove of the interfitted inner shell. 2. A composite drain fitting, comprising inner and outer cup-shaped shells of malleable metal having substantially cylindrical interfitted walls, respectively, adjacent portions of said interfitted shell walls extending inwardly to form a regis tering groove and tongue in said inner and outer shells, respectively, of which said tongue is initially at least in part spaced from said groove, and said cylindrical wall of the outer shell being held uniformly contracted in tight clamping engagement with said cylindrical wall of the inner shell by further permanent inward deformation of said tongue into the groove of the inter fitted inner shell.

3. A composite drain fitting, comprising inner and outer cup-shaped shells of which the inner shell is of stainless steel and the outer shell is of malleable metal more readily cuttable with a threading tool than stainless steel, said shells having substantially cylindrical interfitted walls. respectively, and adjacent portions of said interfitted shell walls extending inwardly to form a registering groove and tongue in said inner and outer shells, respectively, of which said tongue is initially at least in part spaced from said groove, said cylindrical wall of said outer shell being externally threaded and held uniformly contracted in tight clamping engagement with said cylindrical wall of the inner shell by further permanent inward deformation of said tongue into the groove of the interfitted shell.

KENNETH R. MARCUSSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,704,529 Brotz Mar. 5, 1929 1,973,170 Jacobi Sept. 11, 1934 2,279,683 Judell et al Apr. 14, 1942 2,314,002 Lusher et al. Mar. 16, 1943 2,349,202 Slezak May 16, 1944

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