US1266653A - Expansion-plug. - Google Patents

Description

W. -S'. BARLOW.

EXPANSION PLUG.

APPLICATION FILED JLLNE 21. 1911.

Patented May 21, l918.

WALTER S. BARLOVJ, OF MARYSVILLE, TEXAS.

EXPANSION-PLUG.

Specification of Letters Patent.

Patented May 21, 1918.

Application filed June 27, 1917. Serial No. 177,290.

To all whom it may concern:

Be it known that I, WALTER S. BARLOW, a citizen of the United States, residing at Marysville, R. F. D. No. 2, in the county of Cooke and State of Texas, have invented a new and useful Expansion-Plug, of which the following is a specification.

The subject of this invention is an expansion plug wherein a traveling nut cooperates with a screw to expand or contract a sectional plug, and the objects of the invention are to provide means for guiding and centering the plug when the same is being inserted in a pipe; to provide an adjustable plug member, with screw operated means for actuating the same; to provide means for utilizing the plug as a pipe withdrawing implement; and to provide a plug structure of simple formation which may be readily assembled and easily and rapidly operated.

WVith these and such other objects in view as may hereinafter more fully appear, my invention consists in the novel arrangement and construction of parts set forth in the following description, more particularly pointed out in the claims, and a practical and preferred form of which is shown in the accompanying drawing, Wherein:-

Figure 1 is a central longitudinal sectional view of the plug.

Fig. 2 is a cross section taken on the lin 22, Fig. 1.

Fig. 3 is a cross section taken on the line 3-3, Fig. 1, the operative parts being re moved.

Referring to the drawing by numerals Conical members 1 and 2, placed base to base, form the casing of the device. Extending forwardly from the cone 1 is a guide rod 3, having lateral ears 4:, to which are pivotally secured guide arms 5--5, held in their expanded position by compression springs 66. A cross wall 7 is provided in the cone 1, and is bored and tapped to receive the threaded ends of a series of rods 88, which are adapted to bores in the apex of the cone 2 and by which the cones are secured together.

\Vithin the cone 2, and having its inner end suitably journaled in the cross wall 7,

and its outer end extending without the apex of the cone 2, is a threaded rod 9, provided with a collar 10, by which the rod is held in place, and upon the rod 9 travels a nut 11, from which extend the laterally disposed lugs 12, to each of which is pivotally secured a link 13, the other end of which has pivotal engagement with an car 14, formed on a plate 15, which forms a section of the expansion member.

The plates 15 are arranged to slide between the bases of the cones 1 and 2, and the are formed edge of every other plate is beveled in an opposite direction, as seen at 16 and 16, Fig. 1, while the adjacent edges of the plates overlap, thereby assuring a continuous and unbroken plug when the plates are expanded within a pipe.

The apex of the cone 2 may be reduced and threaded as seen most clearly at 17, Fig. 1, so as to permit attachment thereto when it is desired to use the implement for the purpose of withdrawing a pipe from a well,

or forcing the plug into a pipe against pressure.

Dowel pins 8 may be provided at diametrically opposite points of the conical member 1, which project into grooves formed in the underlying plates 15. These keep the cones-and plates in proper position with respect to each other.

In practice the device is used as follows: A crank not' shown may engage the squared end of rod 9 and by revolving the shaft clockwise the nut 11 is caused to travel toward the apex of the conical casing 2. This will, through the links 13, draw the plates 15 toward a common center coincident with the axis of the rod 9 and cause the plates to be housed within the casing W hen a pipe is to be plugged, a section of pipe is threaded onto the end 17, r a rcducing joint may be threaded thereon and the pipe secured to the reducing joint. The plug is then forced into the pipe which is to be plugged, the section of pipe being used as a handle during this operation. A crank is attached to the rod 9, which rod extends through the attached pipe, and the plug expanded.

If great pressure is to be overcome in forcing the plug into the pipe, a yoke may be placed around the handle contiguous the reducing joint, and a block and tackle made use of to force the plug into the pipe.

In withdrawing piping from a well or the like, a pipe or sections of pipe sufiicient to stand the strain are threaded onto the end 17 the plug inserted, the plates 15 expanded, and the whole withdrawn by any suitable and convenient lifting force,

Having described my invention, what I claim as new and desire to secure by Letters Patent is 1. In an expansion plug, a casing comprising conical members arranged base to base, an expanding member comprising sec tions slidably mounted between the conical members, and screw operated means for sliding said sections.

2. In anaexpansion plug, a casing com prising sections, meansfor securingthe sections together, plates, between the sections and arranged to slide radially, and means for sliding the plates.

3.111 an ex )ansion )lll a casin a threaded rod revoluble within the casing, a nut traveling on the rod, plates in the casing, and means connecting the plates to the nut.

4. In an expansion plug, a casing, a threaded rod turning in the casing, anut traveling on the rod, plates in the casing and sliding transversely thereof, and links connecting the plates to the traveling nut.

5. An expansion plug, comprising a sectional casing, means for securing the sections of the casing together, overlapping plates slidably mounted between the sections, and means for sliding the plates.

6. An expansion plug, comprising a casing composed of sections, means for securing the sections together, overlapping plates between the sections and arranged to slide radially, and screw operated means for sli d ing' the plates.

7. An expansion plug, comprising a casing composed of Sections, means for binding the sections together, plates sliding between the sections, a threaded rod revolubl'ewithin the casing, a nut traveling on the rod, and means connecting the plates to the nut to reciprocate the plates to expand and contract the plug.

S. An expanding plug, comprising a casing composed of secti0ns,meansfor binding the sections together, plates in the casing and sliding transversely thereof, a threaded rod turning in the casing, a nut traveling on the rod, and, links connecting the plates to the traveling nut.

In testimony that Iclaim the foregoing as my own, I have hereto atfixed my signatu-re inthepresence of two witnesses.

I WVALTER' S. B'ABLOVV. Witnesses:

J. F. FL TCHER, W. J. Dawson.

Copies of this patent may be obtained. for five cents each, by, addressing the Gommissioner of Patents,

Washington, I). C.

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