USRE21603E

USRE21603E - Flexible tube coupling

Info

Publication number: USRE21603E
Authority: US
Publication date: 1940-10-22

Description

Oct. 22. 1940. 5, GUARNASCHELL] Re. 2 1,603

FLEXIBLE TUBE GOUPLING Original Filed March '7. 1936 EF!- 22 /8 11/ /9/3/;6 /0 /f lNVENT Jipen 'uafnascbe Reissued Oct. 22, 1940 UNITED sTATEs Re. 21,603 r v e rmxmnn ma Comme Stephen Gim-umiem. Jackson neizhu, N. Y..

' assignor to Packless Metal Products Comution, a corporation of Delaware original No. 2.112,238, aaa Much 29, 1988. sz-

rial No. 67,623, March 7, 1936. Application for reissue March 16, 1940, Serial No. 324,389

2 emma. (cl. 'zas- 12) This invention relates to fiexible tubing and particularly to seamless metallic, preferably spirally corrugated tubing and to fixtures or couplings for joining sections of'such tubing and for securing a flexible sheath thereto.

, The sale and use of fiexible metallic tubing has been limited by the fact that it has been practically impossible to join or splice tubing in the field in case of a break. This has required the user to replace the whole length broken or to employ an expert mechanic or service man to w make and seal the joint.

This invention has for its salient object to provide means for securing a flexible sheath of metal or other suitable material to a metallic 'tubing`of `vthe character specified, that is simple and practical in construction and canbe easily applied.

Another object of the invention is to provide a leak-proof coupling for joining together pipe sections of the character specified without soldering or brazing the joint.

Another object of the invention is to provide simple, practical and effective means for forming a conical seat in the end of a corrugated metal tube.

f Another objctof the invention is to provide means constructed and arranged to s`imultaneously secure a sheath to a corrugated metal tube e an`d form a leak-proof solderless joint on the end of the tube.

Further objects of the invention will appear from the following specification taken in con'- nection with the drawing which forms 'a part of this application, and in-which Flg. 1 is a longitudinal sectional elevation through a coupling andhose, the coupling being secured to the hose and -being constructed in accordance with' the invention.

Fig. 2 is an'elevational view illustrating the preliminary step prior to the insertion of the end of vthe hose in the coupling; and g Fig. 3 is an elevational view o'f the split collar which is secured laround an end portion of the"hose to form an abutment or fix this portlon of the hose as the outer end portion iscompress'ed.

The invention 'briefiy described consists of a split collar having its inner surface threaded to receive the spiral corrugations on the outer surface of the' hose and having a conical outer surface adapted to coact with the coupling member to cause the split collar. to grip the hose' and form a firm abutment as the end of the hose is compressed. The coupling comprises a pair of coupling members threaded to each other, f one member having a conical inner surface corresponding to the conical outer surface of the collar and the other member having a conical abutment or-projection'centrally disposed therein and adapted to enter the -outer end of the hose and to form a conical seat thereln as the outer end is compressed when the coupling members are threaded onto each other.

Further details of the invention will appear 10 from the following description.

In the embodiment of the invention illustrated` in the drawing there is shown a flexible metallic spiral hose III having a sheet Il surrounding the outer surface thereof. 1

A split collar 12 having an internally threaded surface |3 is arranged to be threaded on the outer end portion of the hose, the outer surface of the split collar being conical, as shown at lt.

. The internal diameter of the split collar is less 20 than the outside diameter of the hose when the collar gap between the split ends is closed. Therefore, the gap is open when the collar is threaded on or placed around the hose. The conical inner surface lof the coacting coupling 25 member, hereinafter described, causes the collar to be compressed and vgrip the hose.

The coupling in the form of the invention shown comprises a coupling member IB having a threaded 'outer surface IG and a conicalinner 30 surface l'l, corresponding in shape to the outer surface ll of the split collar |2. v

The coupling also comprises a coupling member IB having an internally threaded surface vI! ,arranged for threaded engagement with |the 35 threaded surface IB on the coupling member IB. The member |8 also'has an inwardly extending fiange 20 within which is disposed a'sleeve 2| having a laterally extending flange 22 adapted to abut against the inner surface of thevfiange 20. 40 The member 2| also has' a centrally disposed conical abutment or projection 23 having an outer diameter at the end thereof slightly less than the internal diameter of the hose so that the conical projection 23' will upon its initial 45 movement enter the bore of the hose. The member 2| need not necessarily be provided with a conical seat for the end of the hose, but may,

if desired,-have aseat of other configuration as, for intance; a fiat seat. Furthermore, the parts` 50 It; 20 and 2| may be integral, if preferred.

. The device above describedis used in the following manne'r: The coupling member I! is first slipped over the end of the hose and the threaded split collar I! is then threaded on the outer end-K5 collar I! and the coupling member i! is also moved forward to clamp the sheath between the coupling member and the outer conical surface Il of the collar. The threaded member ll is then threadedon the coupllng member IS and as these two coupling members are threaded to- 7 gether the conical proiection 23 will enter the end of'the hose and the hose will be compressed into asubstantially solid mass between the collar |2 and the projection 23 and inner surface of the fiange 22.V Ifthe member 2| has a flat seat the end of the hose will abut against the flat surface and willbe compressed into a substantlally solid mass between the collar I! and said fiat surface. This relative vmovement of the coupling members II and Il will cause the split collar ll'to be fur.- ther compressed around the hose, thus forming a firm and secure abutment to hold the hose during the compression of the end thereof.

The construction above described will form a secure, tight, leak-proof joint at the end of the hose and the seat or joint at the end is formed during the operation of the coupling thereon. No further tools or apparatusis necessary. Furthermore. should it be desired to obtain a swiveiing action between the ends of the coupling, the coupling member II may be loosened and the sleeve 2| can be rotated therein.

Although one specific embodiment of the invention has been particularly shown and described, it will be understood that the invention is Vcapable of modiflcation and that changes in the construction and in the arrangement of the various cooperating parts m'ay be made without departing from the spirit or scope of the invention, as expressedin'the following claims.

What I claim is:

1.`In combination, a fiexible spiral metallic tube, a split collar having a spiralV inner surface adapted to engage and receive the spirals on the tube and having a tapered outer surface, the internal diameter of the split collar being less than the outside diameter of the hose when the split collar is closed, a coupling comprising a member having a conical seat having an outer diameter at the end thereof dimensioned to receive and enter the bore of the tube and having a flange at the large end of the conical seat adapted to form an abutment for the end of the tube. a second coupling member having a conical inner surface arranged to wedgingly receive the conical outer surface of the split collar to prevent expansion of the collar and longitudinal movement of the 'hose in the collar, and means engaging said two coupling members to draw said members toward each' other, thus eompressing the end portion of the tube into a compact mass and forming a conical seat at the end thereof.

2; In combination. a iiexible corrugated metallie tube, a split collar having a corrugated inner surface adapted to engage and receive the corrugations on the tube and having a tapered outer surface, the internal diameter-of the split collar being less than' the outside diameter of the hose when the split collar is closed, a coupling comprising a member having a seat at the end thereof adapted to receive and to form an abutment for the end of the tube. a second coupling member having a ccnical inner 'surface arranged to wedgingly receive theconical outer surface of the split collar to prevent expansion of the collar and longitudinal movement of the hose in the collar, and means to draw said coupling members toward each other, thus compressing the end portion of the tube into a compact mass between the seat and the collar.

x GUARNASCHEILL