Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS450910 A
Publication typeGrant
Publication dateApr 21, 1891
Filing dateAug 9, 1890
Publication numberUS 450910 A, US 450910A, US-A-450910, US450910 A, US450910A
InventorsElliott D. Fisher
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Stove-pipe-fitting tool
US 450910 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

(No Model.)


N0..450,910. Patented Apr. 21,1891.





SPECIFICATION forming part of Letters Patent No. 450,910, dated April 21, 1891.

Application filed August 9, 1890. Serial No. 361,598. (No model.)

T0 on whom it may concern:

, Be it known that I, ELLIOTT D. FISHER, of Franklinville, in the county of Oattaraugus and State of New York, have invented a new and useful StovePipe-Fitting Tool, of which the following is a full, clear, and exact description.

The object of this invention is to provide in one compact and simple implement a ready and efficient means for expanding one end of a stove-pipe joint and correspondingly contracting the end of a similar pipe-joint to adapt them for a sliding connection.

To this end my invention consists in the peculiar construction of the implement, as is hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 represents the preferred form of the device and its method of application to expand and contract the ends of stove-pipe sections. Fig. 2 is a slightly-changed form for the device. Fig. 3 is another modification, and Fig. i is a view of an ordinary cone-frustum on which my construction is an improvement.

In all the figures the device presented in modified forms has the main essential feature shown, which consists in making the implement tubular and cone-frustum in form.

In Fig. 1, as presented, the implement consists, essentially, of a frustum A of a hollow cone having a short annular sloping shoulder a at a point which is near the longitudinal center of the implement. From the shoulder a to the smaller end Z) aregular taperis given to the body A, and upon this terminal end an inward-contracting curvature of the material is produced, thus adapting this end of the tool to enter the end of a stove-pipe section B and expand the same, if a revoluble motion and longitudinal pressure isapplied to the tool. From the shoulder a toward the opposite terminal end 0 of the tool A the diameter is regularly increased, and at the edge is outwardly curved into a slightly-bell-shaped entrance, wherein the end of a stove-pipe section 0 that is equal in diameter to the section B may be introduced, and by a proper manipulation of the tool be slightly crimped, so as to contract the diameter of this pipe end portion 0' and render it tapering towardthe shoulder a, which, when internally engaged by the end 0' of the pipe-section G, will give the same a short inward bend. In a similar manner the end a of the pipe-section B, if made to impinge on the revolubly-moving shoulder a on its exterior surface, will be slightly bent outward, and thus adapted to receive the tapered end of the other pipe-section C.

In Fig. 2 the same form is given the tool A, except that the end 0 is not flared, the operation of the tool is the same, and if proper proportions are maintained between the pipe to bev fitted and the diameter of the tool eificiency in operation will result from use of this slightly-altered form of the device.

In Fig. 3 the device has its ends left uncurved, there being the offset shoulder a, produced on the conical body of the tool, which will remove all irregularities on the edge of the expanded pipe-section and turn in the edge of the crimped section, so that these sections may be readily slid together until a tight joint is secured. I The tool shown in Fig. I cannot be as readily inserted into or over the pipe ends and produces flares or contracts said ends to a much greater length than is necessary and consistent with economy, for with such a long flare a much longer portion of the opposing pipesection must be inserted therein than is necessary where only the extreme end edges are fiared'or contracted, as the case may be, by means of the short sloping annular shoulder a of my implement. Moreover, the joined ends of pipes treated by my implement will lie almost in the planes of their remaining portions, and a much neater joint will thus be effected.

It is to be understood that the several sections of a stove-pipe to be joined are each expanded at one end and crimped at the opposite end, so as to adapt them for a proper connection and formation of an extended line of pipe.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A stove-pipe-fitting tool comprised of a hollow conical body having an annular shoulder formed 011 its longitudinal center produc ly-sloping shoulder formed on it near its center of lengthQan inward curvature produced on the edge of the small end, and a flaring mouth on the larger end of the tool, substantially as set forth.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2767605 *May 5, 1953Oct 23, 1956Henry Edward WierschHand tool for truing pipe ends
US3164045 *Jun 8, 1961Jan 5, 1965Lee Kennedy MichaelTube swaging tool
US6832502 *Feb 11, 2000Dec 21, 2004Schoolhill Hydraulic Engineering Co. Ltd.Apparatus for swaging an object
Cooperative ClassificationB21D1/06