US1068860A - Expander. - Google Patents

Description

' WITNESSES W. H. DAVIS.

EXPANDER.

APPLICATION FILED APR.4, 1913 Patented July 29, 1913.

2 SHEETS-SHEET 1.

w. DAVIS,

I EXPANDER. APPLICATION PIIJ-ID APB.4, 1913.

2 SHEETS-SHEET 2.

INVENT R 7y: E

Patented y 1913,

R W w *QN H "UNITED. STATES- PATENT OFFICE.

WILLIAM HENRY DAVIS, or BAYONNE, NEW JERSEY, AssrcNo'R T0 EUREKA FIRE HOSE MANUFACTURING COMPANY, or JERSEY CITY, NEW JERSEY.

ExrANnER.

Patented July 29, 1913. Serial N 0. 758,909.

To all whom it may concern:

Be it known that I, WILLIAM HENRY DAVIS, of Bayonne, in the county of Hudson and State of New Jersey, have invented a new and useful Improvement in Expander-s, of which the following is a specification.

My invention relates to expanders for expanding the holding ring used in fastening couplings upon hydraulic or other hose. The'invention is applicable to all forms of expanders of this kind whether operated by power or by hand. Expanders of the kind in question are provided with segments held .together elastically around a mandrel having a tapered or frusto-conical front portion, which when moved lengthwise in the proper direction will expand the segments which encircle it, and will thus efl'ect in a Well known manner the expansion of the copper or brassholding ring previously placed on such segments into the hose coupling surrounding it, the body of the hose being clamped between the body of the coupling and the holding ring and being thus secured tightly to the coupling. After the operation is completed the mandrel is moved in the opposite direction with a view to withdrawing the expanding conical portion of it from the segments. But owing to the tight wedging together of the segments and the mandrel, the segments with the coupling carried by them will move with the mandrel and remain jammed tightly thereon unless re-' strained in some way. A usual method of restrainingthe lengthwise movement of the segments has been to cause them to .engage at their rear ends with the body of the bearingin which the mandrel moves, being provided, for example, withhooked rear ends which engage an annular retaining recess or slot in the front end of the mandrel bearing. Restraining devices of this character serve well enough so long as they are in order, but it frequently happens in the use of the machine that the segments become misplaced or jammed, and in such case the retaining devices have no useful purpose, but serve only to distort the stand and mandrel bearing in the same, or to otherwise injure the machine. Other modes of preventing segments or couplings from moving forward with the mandrel while not open, at least to the same extent, to the serious objection above noted, are none the less defective in that they require very considerable to be secured to a bench purpose of my invention is to obviate of injury either to the mechanism or to the hose,

I will first describe my improvement in connection with the accompanying drawings forming part of this specificatiom'and will then point it out more particularly in the claim.

In the drawings-Figure l is a side elevation of an expander embodying my improvement showing the hose coupling on the expander and held in place in accordance with my invention. Fig. 2 is a longitudinal horizontal axial section of the implementshowing the holding chain in place. Fig. 3 is a section on line 3-3 Fig. 1. Fig. 4 is a section on line 41-4 Fig. 1. Fig. 5 is a perspective view of one of the segments de- 'ta-ched.

A is the stand ofthe implement, adapted or other convenlent support. In the top of the stand is the horizontal tubular bearing A for reception of the mandrel, having an interior of polygonal cross section for a portion of its length, as at a, and at its rear end a nut B swiveled in the stand concentric with the bore of the tubular bearing, and provided with radial handles B by which it may be rotated to advance or retract the mandrel. The mandrel C is provided with a front conical or frusto-oonical port-ion c constituting the expander proper, an intermediate,

portion '0 of polygonal cross section to fit and slide lengthwise without rotation in the portion a of the tubular bearing A, and a rear portion formed as a screw threaded spindle 0 which passes through and engages the swiveled nut B. Upon the man drel, in advance of the front end of the tubular bearing A, are mounted the expander segments D,-. having their front ends notched as shown to form when assembled an annular groove to receive a rubber or other elastic ring 11, by which the segments are held together on the mandrel, The working faces of the segment are of a length equal to that of the'copper coupling ring to 119 be expanded. {Rotation of the swiveled nut B in one direction willretract the mandrel l, with the .eflz'ect ofexpanding the segments and Consequently the copper coupling ring whichsurrounds them. Rotation of the "nut in the opposite direction will permit the i copper coupling the ready removal of the coupling from the ation.

( the.

tise connection with the front portionof said tubular'bearing usually found in this type of expander. .I come now to a description of that portion of the implement in which my improvement is more particularly comprised, and which is designed, as before said,.to prevent the segment and coupling from .moving forward with the mandrel after the copper coupling ring has been duly expanded into place, and tothus permit expander-after the completion of the oper- The device I employ for the purpose is a chain, or its equivalent, secured at one end to the stand on one side thereof adjoining the front end of the tubular bearing in whih the mandrel moves, and provided with means on the other side of the stand to secure the free end of the chain after the latter has been engaged with and drawn around the hose coupling so as to hold it in place .upon the segments and up against front endof. the tubular hearing. In the preferred arrangement for'this purpose, as shown in the drawings, the chain E is a flat chain having enlargements or knuckles I at the points where the links are jointed to-.

gether, said chain being connected to the secured in ears g, laterally projecting from one side of the tubular mandrelbearlng A, on which pin one end of the chain is hung. Onthe op osite side'of the piece A are two lateral y projecting lugs h, the interval between which forms a slot 2' wide enough to permit the passage of the flat portion .of the links between the knuckle joints, but not wideenough to receive the knuckles themselves. Thus when p .the fiat part of oneof the links is slipped from the front into the slot 71, the knuckles on each side thereof will bring up against the lugs h, and will thus constitute dogs'or stops to prevent longitudinal movement of the chain in either direction. through said s ot. i The manner of .using the device is as follows The copper couplin ring y is first piaced on the segments, an then the couin i; p aced'o'ver the mandrel and upon the X containing the end of'the hose m segments,and butting up against the usual annular flange a on the front end of bearing A, to bring the copper ring :1 opposite to. the recess into which it is to be expand-I ed, so as to force and-"clamp therein the hose. The expanding mandrel-is then movedin a difection to draw its conical expanding portion toward the segments, thus expanding the ring 1 and securing the hose to the couplin Either before or after this operation, t e and it's free end is fastened in place. For this purpose it is first passed over the coupling lug w coupling, down under and partly around the coupling, up to the coupling lug w on the opposite side of the coupling, over which lug it is drawn taut and then passed to the slot 71 which it engages by having the flat part of one of the chain links at its free end entered into said slot, as shown more particularly-in Fi 1, the knuckles at each end of the link bringing up against the faces of lugs h, and holding the free end of the chain tight against lengthwise move-"' ment. In order to release the hose coupling from the expander, the mandrel is moved to the front. Were it not for the chain, the segments and coupling ring, which by the expanding operation have become tightly wed ed and stuck together and to the conical portlon ofthe mandrel, would follow the movement of the mandrel and remain stuck thereon. Butthe chain holds'the' coupling fast against this movement, with the result that the segments and the coupling thereon, break away from the mandrel, and the segments thusloosened permit the ready deholding chain. is engaged Wltll 1) the coupling,

on one side of the I tachment and removal of the coupling from the expander. The device can be used safely and readily by inexpert labor upon .hose couplings of various sizes and forms. chain may bepassed around the coupling lugs a: 1n any convenient manner, or, if there are no such lugs, may pass around the coutions or enlargements corresponding 1n position and function to the knuckles or enlarg'ements of the chain already described. Other fastening means forthe free ends of the pliable coupling also be provided, in lieu of the particular means for' this purpose herein illustrated, although the latter is the preferred form of such means. 1

What I claim herein as new and desire to secure by Letters Patent, is:

In a machine for expanding the holding ring used in fastening'hose couplings upon hydraulic or other hose, and in combination with the expanding mandrel, mandrel supporting stand andactuating mechanism, and

The

holding member may plmg itself, or even the hose itself just bethe segments mounted upon said 'mandr'el to receive said holding ring, a pliable retain ing member, secured at one end to the mandrel supporting stand, and adapted to detacliably engage the hose coupling operated on by the machine, and fastening means for securing against movement the free end of said pliable member thus engaged with the hose coupling, so as to holdthe latter tightly in place against movement of the mandrel in a direction to carry its conical expanding portion. away from the segments, substantially as and for the purposes hereinbefore set forth.

In testimony whereof I in presence of two Witnesses. WILLIAM HENRY DAVIS. Witnesses:

BENJAMIN L. SToWE, MAR'Y GORMAN.

affix my signature 15

Images