US1447154A - Tube expander - Google Patents

Description

Feb. 27, 1923.

2 sheets-sheet l W. F. SAWADSKI TUBE EXPANDER Filed Jari. 51, 1921v ATTORNEY Feb. 27, 1923.

W. F. SIAWADSKI TUBE EXPANDER Filed Jan, 51, 1921 2 sheets-sheet 2 d1/fn INVENTQR ATORNEY WITNBS:

Patented eb. 27, i923@ f entre WILLIAM r. snwnnsnr', or 4orientansfron, sourir CAROLINA.

TUBE EXPANDER;

Application led .'lanuary, 1921. Serial-:toA 441,344.,

To aZZwz'o'm/z'tmay concern.'

Be it known that l, lll/intuir F. Sewansnr, a citizen oi the United States, residing at 22 Laurens St., Charleston, in lthe county 'ot' Charleston and State otSouth. Carolina.,l have invented new and use'lul improvements in Tube Expanders, of which the following is a speciication.

In the kpresent constructionot enpanders torvthe tubes of marine boilers, a conical drill which is `freely movable longitudinally through the open end of the stock contacts with rollers and the rapid turning ot the stool; by a suitable machine forces the conical memberoutward of the stock 'and consequently projects the expanding rollers. No means is providedvt'or adjusting the conical member, and aboard vessels where suit ableniachines for operatingsuch enpanders are noti installed, these tools cannot be used successfully even when the tube is to be expanded at the upper end thereo't and cannot be used at all when the tube is to be expanded at its lower end'. 'C 1 It may therefore be consideredthe pri-V mary object of the present invention to produce a tube expander having .means tor projecting VVthe roller expanding elements through the stock to anyy desired degree, and

whereby the expander may be successfully employed either in an upright vertical posxtion, a downright vertical position, or at any desired angle with respectk to the arrangement ot the tubes to be expanded.

The foregoing, and other objects which will appear as the nature of the invention is better understood, may be accomplished by a construction, combination and operative association of elements, such as is disclosed by the drawings which accompany and which formpart of this application.

In the drawings Figure 1 is a plan view of the improve` ment.

Figure 2 is a sectional view on the line 2-2 of Figure 1.

Figure 3 is a transverse sectional view on the line 3-3 of Figure 2.

Figure 4; is a similar sectional view on the line 1 -4 of Figure 1.

Figure 5 is a transverse sectional view ony line 5-5 of Figure 2. Figure 6 is a similar sectional view on line 6-6 or" Figure 2.

Figure 7 is a view looking toward the headed end of the outer portion of the stock which carries the expanding rollers.

Figure 8`is .ai similar view,-looking-towanctthe head ontheothersection of the stock,

Figure 9 is a'. perspective vieW 0f the cone-k shaped roller projectingpin.

The'stoclr ot my improvementgcomprises twosections, which, for convenienceinmanutacture, and also forv convenience in assem blage oi parts, is constructed of two' sec-- tions. i The outerv and longer section is indi;- cated by! the numeral l, and theinner. and, shorter section is indicatedfby thegnumeral 2. Y As inthe general construction, the, confronting endsot the sect-ions 1 and 2 are ,provided with rounded enlargements forming ,A the same with heads 3, the-said'heads designed@ 'to abut and are rconnected together-by ree movable means such-as headedbolts 4.. The inner section 2 is provided'with a; widened portion which extends longitudinally 'from its head 3, the said portion being indicated by the numeral 5. The head 3 of the section 2, and its enlargement 5 havea rounded pocket 6, therein, and the inner wall l T provided by the pocket is bored longitudinally to provide three equi-distantly spaced rounded openings l8 that `communicate with elongated slots Qin, the said section 2. The slots Qterminateaway fromthe` outer end of the section 2, and the opposed -.walls provided by the slots are rounded inwardly in correspondence to the opposed walls `provided by the respective openings 8. The openings S and the slots 9 communicate with the central rounded bore 10 of the section 2, and passed through each of the openings and enering each ot' the slots is a roller expanding element 11. Theslots and openings are so arranged that the rollers 11 may project into the bore 10, when the outer surfacesthereof are in a line with the outer surface or periphery of the section 2.

The roundedhead 3 of the seetion2 is peripherally formedv with a continuous groove 12, and the rounded head of the section 1 is provided with a peripheral flange 13 that is designed to be received in the groove 12, when the sections l and 2 are assembled.

lThe section 1 is provided with an elongated pockets provided by the slots and openings,

I arrange in the pockets 6, over the inner and rounded ends of thesaid rollers, a bearing vwasher 16. Over this washer, l position a sleeve 17. This sleeve is retained in proper position through the medium of comparatively small bolts 18 that pass transversely through the enlargement 5 and have their' threaded ends received in threaded openings in the sleeve.

The stock of the tool is provided with an elongated slot 19. This slot is disposed in a line with the end wall of the bore 1l of the section 17 passes through the heads of both of the sections and terminates a slight distance inward of the inner wall 7 provided by the pocket 6.

c Arranged for slidable movement throngli the bore of the stock is a conical pin 20. fin the widened end of this pin which is received in the section 1 of the stock7 I secure a, handle member 21 which issubstantially ilshaped in plan whereby the reduced portion thereof` which is Connected to the pin, may freely slide through the elongated slot in the stock. The handlf.` 21 may be adjusted to move the pin longitudinally and the said pin contacting withY the expanding rollers will force the same outwardly through their slots to properly bear against the tube to be expanded.

Through centriingal force. incident to the rapid revolving of the stoel( the pin will automatically be moved outwardly oithe said stoel; to project the rollers when the iinproveinent is held at a. downward vertical or at a downward angle slightly beyond the vertical, but the degree in which the rollers are projected may be readily regulated by arranging the head oi the pin at any desired position on the stock. lt should have been stated that the elongated slot in the stoolr has its walls disposed at opposite inclinations7 corresponding to the angle sides or edges oi the head, and the contacting engagement or the head with the said walls will hold the pin when the latter is retained at said positions, and this is most especially true when the improvement is employed for expanding tubes that are disposed horizontally or at varying angles below the horizontal, as the irictional engagement between the handle and the walls oi the slots is sufficient to prevent the pin being moved longitudinally by centriiz igal iorce.

Having described thei vention, l claim ln a tube expander, a stock having a bore therein, elongated slots Whose opposed side walls are rounded inwardly and which provide pockets thereby, expansion rollers 'freely seated in the pockets, a conical pin movable longitudinally in the bore for contacting with the rollers and projecting the same. said stock having an elongated slot therein arranged between the inner terminal of the bore and inwardly of the rollers, and the longitudinal walls provided by the slot being arranged at opposed angles, and a substantially V-shaped head on the widened end or the pin projecting through the slot and whose angle side surfaces of which are designed to frietionally engage with either of the angle walls provided by the slot. when the steelt is revolved`r as and for the purpose set forth.

ln testimony whereof I ailix my signature.

vi'fiLLniM r. sAwADsirr.

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