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Publication numberUS355644 A
Publication typeGrant
Publication dateJan 4, 1887
Publication numberUS 355644 A, US 355644A, US-A-355644, US355644 A, US355644A
InventorsCharles E. Emeey
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 355644 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.) 5 Sheets-Sheet 1.



Patented Jan. 4, 1887.

n PLIERS, Pnmumn n m. Washington. n. c.

(No Model.) 5 Sheets-Sheet 2;

0:. E. EMERY.


No. 355,644. Patented Jan. 4, 1887.

N. PETERS Pholo-Litha raphar, Wzahingtan, u. c.

5 Sheets-Sheet 4.

(No Model.)



Patented Jan. 4-, 1887.

n. warns. MW w m m 0.0;.

(No Model.) 5 Sheets-Sheet 5 O. E. EMERY I TUBE BXPANDER.

No. 355,644. Patented Jan. 4,1887.




SPECIFICATION forming part ofLetters Patent No. 355,644, dated January 4, 1887.

To all whom it mayeo'ncern:

Be it known that I,CHARLES E. EMERY, of

.the city of Brooklyn, county of Kings, and

State of New York, (office New York city,) have invented cert ain new and useful Improvements in Tube-Expanders; and I do hereby declare that the following is-a full, clear, and exact description of the same.

The invention relates to an apparatus for expanding the ends of metal tubes so as to make fluid-tight joints in flanges, couplings,

or fittings of various kinds used to connect successive lengths of tubing together.

When the apparatus is used to secure a flange on the end of atube, such flange may be bolted to a flange on the adjacent end of the next tube,

in the usual way. lVhen pipe-couplings adapt- 1 introducing into the piece of pipe last applied the apparatus to which this invention refers, and expanding the joint in a coupling by an operation conducted through the length of tube last applied. 1 The apparatus herein referred to is intended to be used principally in connection with my improved joints, which are adapted for this particular 'method of working such appa-- tus, making it possible to obtain fluid-tight joints without the use of screw-thread sockets, cone-rings, or other devices necessarily employed in securing the lengths of thin pipe by i I ordinary methods.

My invention relates, first, to an improvement in what is known as the Dudgeon Tube Expander, with which it is' possible to roll grooves in the tubes for the purpose of securing the same to couplings, flanges, 850.; second, to apparatus for use in combination with a tube-expander which enables the expander to be operated efficiently at a considerable distance within a tube from the open end thereof.

The'several features of the invention will be fully set forth further on.

The accompanying. drawings form a partof can be realized by such use.

section of the device shown in Fig. 6 with the ,nect.

is connected to a line which may extend for Application filed Aprillfi, 18r3. Renewed December 3, 1885. Again'ronewed September 23, 1886. Serial No. $4.394. (N0 model.)

this specification, and represent what I consider the best means of carrying out the invention.

Figure 1 is a central longitudinal section showing a tube in the act of being expanded into a stout ring into which the adjacent end 0f the next length of tube has been previously expanded. Fig. -1 shows a small portion thereof on a larger scale. Fig. 2 is a section on the line y Fig. 1. yoke which applies as a gage against the stout coupling-ring resting on a section of the tube which is being fastened. Fig. 4 is a longitudinal section through the expander and immediately adjacent parts on-a larger scale. Fig.4 is a corresponding section showing the completed joint after the expander is removed, with the ring in a modified form. Fig. 5 is a cross- Fig. 3 represents the section on the line as x in Fig. 4. The remain ing ten figures represent modifications. Fig. 6 is a section corresponding touFig. 4, there beingno inner series ofrollers, and with the mandrel tapered in the opposite direction. In operating this form of expander mechanism the mandrel D- and the expansiontube D are moved by the screw G in the opposite direction to that in which they are moved in Figs.

-1 and 3. This figure shows the ordinary Dudgeon rollers. Such can be used with the form shown in Figs. 1 and 4, if preferred, and some portions of the advantages of my invention Fig. 7 is a crossring 0 omitted. The remaining eight figures will be described further on.

' Similar letters of reference indicate corresponding parts in all the figures.

Referring to Figs. 1, 1, 2,-and 3, A and B are two lengths of large thin iron tubing which it isdesired to strongly, rigidly, and tightly con- It will be understood that the tube A an indefinite distance, all connected together by means of my invention.

Ois a stout union-ring, of cast iron or other suitable material, certain portions being denoted by additional marksfwhen necessary, as O 0 O are circular ribs formed on the outside in the planes where the expanding is effected.

C is an internal rib extending around at the mid-length of the tube.

O O are internal ribs, formed and arranged as shown, to take a strong hold on the tube when a tube is expanded strongly into the channel 0 between them.

Each ring 0 has two of the channels 0, each with the internal ribs, G 0, adjacent. The expansion is effected by hard steel rollers, caused to traverse around in the interior of the tube and to swell that portion of the metal outward on the principle employed in the wellknown Dudgeon expander. Certain peculiarities of the expander itself will be described further on.

D is a tapering mandrel fixed on a tube, D, and in line therewith. The tube D is of a length somewhat greater than that of the tube, B, which is to be secured. The mandrel D, with its attached tube D, is inserted through the entire length of the tube B. The mandrel is turned by operating on the projecting end of the tube D. The open end ofthe tube D is engaged by a ratcBet-lever, E, with the accompanying ratchet mechanism of the ordinary cha'racter, including a pawl, E, which engages with a toothed wheel, D", fixed on the tube D. The attendant grasps the ratchetlever E and vibrates it, with the effect of re volving the tube D and consequently the mandrel D, turning the screw G freely iuits bearings in the cross-piece H.

The operation of the Dudgeon expander requires that the mandrel D shall be turned strongly around either continuously or intermittent-1y, and also that it shall be moved gradually eudwise, so as to present a thicker and thickerportion of the mandrel to force the rollers outward. I effect and control the end movement by a screw, G, and hand-Wheel G; The screw is marked G,and is tapped through a screw-plug, D strongly secured to the end of the tube D by being tapped into the hub of the wheel D which, as set forth hereinbefore, is fixed upon the tube end. A handwheel, G, is fixed on the end of the screw G\ The latter is supported in a bearing, G, be;

tween collars on the shank of the screw, as represented. The bearing G is supported in a cross-piece, H, which is connected by tierods H H with a cross-frame, H which lat: ter applies closely around the tube D and is maintained in position thereby. From the outer ends of the cross-frame H are extended rigid tubes H which connect to a yoke, H, formed as shown, which abuts against the adjacent end of the ring 0 and gages the position in which the several parts of the expander shall be held.

I is a tube mounted concentrically around the mandrel D and tube D. It is supported and fastened at one end in the cross-framing II. On its other end is fixed a ring, I, of

slightly larger diameter, in which are tapped screw-pins t, the points of which engage with a ring, J, which is made in two or more pieces, and fitted with proper lubrication in a.

groove in the boss or neck K of the housing they must move together longitudinally, but' are free to rotate independently.

I believe it practicable to employ the ordinary Dudgeon expander, with rollers of proper size and form to accomplish the desired end, the rollers being of such size and so mounted, as usual, that the mandrel D will act directly against each other, forcing it outward to per form its portion of the required expanding of the tube. While the narrow surface on each roller which I propose to present against the interior of the tube is ample for the distention of the tube, it is liable to cut and abrade the mandrel D by reason of concentrating the pressure on a narrow portion of the surface. I avoid this by using a double set of rollers. The outermost rollers are marked M. They are six in number, and are each formed with a bead or narrow swelled surface on its exterior and at about the mid-length. Each bears on two of the inner rollers, N, each formed with a large bearlng-surface properly conditioned to rest fairly against the tapering mandrel, and with a groove, n, equal 'to or a little greater than the bead m in each roller M. Each of the rollers M and N is formed with a trunnion at each end. On each trunnion are fitted two links, P P. These links unite the several rollers and compel them to serve as a united system, but: without-interfering with the expansion of the work by changes of position of the rollers as the mandrel is driven in.

The two parts of the housing K are connected by thimbles K and bolts K, as is plainly shown in Figs. 1, 4, and 5.

-tube, are now applied, and all the parts being in the position shown in Fig. 1, the handwheel G is turnedto drive the mandrel D endwise sufficiently to bring the rollers M N to their bearings against each other and against the interior of the tube B. Now, the lever E is reciprocated actively and the handwheel G turned gradually, with the effect to turn the mandrel D intermittently around,-

and also to move it gradually eudwise, forcing the innermost rollers, N, outward, and conse-

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4090382 *Jan 31, 1977May 23, 1978Thomas C. Wilson, Inc.Expanding and beading apparatus for tubes and the like
US4411456 *Jan 15, 1980Oct 25, 1983Martin Charles FApparatus, methods, and joints for connecting tubular members
Cooperative ClassificationB21D39/10