US1539643A

US1539643A - Flue expander

Info

Publication number: US1539643A
Application number: US664303A
Authority: US
Inventors: Bush Carl
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-09-22
Filing date: 1923-09-22
Publication date: 1925-05-26
Anticipated expiration: 1942-05-26

Description

May 26, 1925.

UNITED STATES CARL BUSH, F MAT-TOOK, ILLINGISL FLUE EXPANDER.

Application filed September 22, 1923. Serial No. 6S4l,303.

To all whom may concern:

Be it known that l, CARL BUSH, a citizen of the lhaited States, residing at Mattoon, in tllu county of Col-es and State of Illinois, have invented new and useful Improvements in lilue llxpanders, of which the following is a specification.

This invention relates to a device for expanding the ends of boiler fines to properly hold them in assembled position relative to the ends or heads of a boiler, and an object of the invention is to provide an expander which may be easily placed in the end of the line and expanded, to expand and crimp the ends of the flue and which also includes means to facilitate the contraction and removal of the expander from the flue without in any way cit acting or mutilating the expanded and crimped end of the fine or loosening the tight connection between the line and the boiler end. I

Another object of this invention is to provide in combination with an expansible .tlue expanding head a pin which is octagonal shaped in cross section for expanding the head and also an extractor which is carried by the expanding pin and is designed to be struck repeatedly by a pneumatic hammer or like tool for loosening the flue expanding head and extracting it from a properly expanded flue.

Heretofore, considerable diii iculty has been experienced in the extracting or the removal of line expanding heads from boiler fines, and an object of the present invention is to provide a device for overcoming these disadvantages by providing .an extractor which will, when it is struck by the hammer be prevented from rota-ting relative to the expanding head and will administer a slight transverse as well as a longitudinal action against the head.

Other objects of the invention will appear in the following detailed description taken in connection with theaccompanying drawing wherein Figure 1 is a side elevation partly in section of the improved expander illustrating its use; and

Fig. 2 is a detail cross-section on the line 2-2 of Fig. 1.

Referring more particularly to the drawings, the improved flue expander comprises an expanding head 1, which is formed of a plurality of individual sections 2 each of which is shaped, so that when assci'nblcd they will expand the boiler fine as shown at' at the inner side of the boiler end 4:, and will crimp the outer end of the :flue against the outer surfaceot the plate 4 as shown at 5 for tightly connectingthe fiue 3 with the plate t. The sections 2 of the expanding head 1 are held in their proper relation one to the other by means of a spring band 6 which extends about the sections outwardly of their flue forming or shaping portions. All of the sections, when assen'ibled' are arranged to provide an axial bore which receives therethrough tapered end 7 of the wedging pin 8. The wedging pin 8 is hexagonal or polygonal in cross section and it tapers inwardly towards its inner end, as clearly shown in Fig. 1 of the drawings.

The head 1 is prevented frompassing off the inner small end of the pin 8 by means of an upset head 9. head 1 is on the reduced end of the pin 8 the sections 2' will be in their contracted or innermost position which will permit them to be inserted into the end of the boiler tube After the expanding head has been properly inserted into the boiler flue 3 the pin 8 is driven inwardly, preferably by means of a pneumatic hammer which forces the sections 2 outwardly, in all directions, and causes the forming of the bead 10 on the flue against the inner side of the plate 4 and the crimping of the outer end of the flue at- 5 to properly wedge the flue 3 in place. After the flue has been expanded, it will be apparent that the expanding head 1 will be tightly wedged in the fine and to release the expanding head from the fine, to permit the withdrawal of the head a releasing member or extractor 12 is mounted upon the substantially straight end of the pin 8. The releasing member 12 has a laterally ex tending projection 13 formed thereon which includes a rounded end portion 14 that projects beyond the end of the main body of the releasing member 12. To release the head 1, the pneumatic hammer or like tool (not shown) is placed to strike or apply its force against the rounded end 14 driving the member 12 against the head and consequently forcing the pin 8 outwardly out of the head 1. The ball or rounded end 14 being disposed laterally of the axis of the octagonal pin 8, and forwardly of the end of the member 12 will cause a slight lateral action of the "force against the octagonal pin, as

the

lVhen the expanding- Cal well as causing a longitudinal force against the head 1 which will increase the releasing or loosening action upon the head to permit its withdrawal. By providing the octagonal pin 8, the extractor 12 will be prevented from spinning or turning around on the pin when it is struck with the hammer.

It is, of course, to be understood that'the invention may be constructed in other manners and the parts associated in difierent relations and, therefore, I do not desire to be limited in any manner except as set forth in the claims hereunto appended.

Having thus described my invention,

what I claim is:

1. In combination a flue expanderincluding an expansible head, a tapered expanding pin polygonal shaped in crosssection, an extractor mounted upon said pin and provided with a polygonal bore for fitting about the pin, said extractor adapted to have pressure applied thereto to release the expansible flue expanding head, and means for preventingiremoval of the expansible head from the pin.

2. A flue expander comprising in combination, an expansible head, a pin polygonal shaped in cross-section and having one end tapered, said pin adapted to be forced by pressure through the head for expanding a flue, an extractor mounted'upon said pin outwardly of said head and having a poly onal bore for snugly fitting the pin, alateral projection on the extractor having a rounded end portion adapted to receive force from a tool, and an upset head on the tapered end of the pin to prevent removal of the expansible head from the pin.

In testimony whereof I afiix my signature. 7 CARL BUSH.