US1591718A - Cutting device - Google Patents

Description

July 6 G. E. MCGRATH cuTnNebsvIcE Filed Jan. 15, 1925 Patented July 6, 1926.

GEORGE E. 'MCGRATH,

PATENT oF Fr-c OF CHICAGO, ILLINOIS.

CUTTING DEVICE.

Application .filed January This invention relates to improvements in cutting devices particularly adapted,

though not necessarily limited in its use for cutting and loosening deposits and for- 5 eign matters in conduits or pipes such as sewers or the like, to facilitate the removal of such deposits, and one of theobjects of the invention is to provide an improved cutter of .this character adapted to be drawn 3 through the pipe and which cutter will be automatically axially rotated to effect the cutting operation, by the action of the contents of' the pipe upon the cutter.

A further object is to provide an im- 5 proved cutter of this character embodying .a series of spaced cutter elements connected together so as to rotate independently with respect toeach other, the cutters successively increasing in size from. one end of the series to the other end thereof.

To the attainment of these ends and the accomplishment ofother new and usefulobjects as will appear, the invention consists in the features of novelty in substantially the construction and in .the'combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawing illustrating this invention and in which draw- Figure 1, is a top plan view .of a series of cutters showing them in position in a pipe or conduit, the latter being in horizontal section.

5 Figure 2, is a detail sectional view on line 2-2 Figure 4.

Figure 3, is an end elevation of one of the cutter elements.

Figure 4, is an assembled View of portions 0 of the cutter element.

Figure 5, is a detail sectional view on line 5-5 Figure 4.

Figure 6, is a view partly in elevation and partly in section of a modified form of 5 cutter.

Each of the cutter elements consists of end members 11, preferably of disc like formation and they are provided with a number of radially arranged slots 12 extending through the periphery of the disc and terminating short of the center of the disc.

An eye bolt 13 is swiveled in each of the end members and to the bolts 13 may be secured a flexible connection such as a cable,

15, 1925. :Serial No. 2,605.

chain, or the like for connecting the cu tors in series or tandem. The .ifiexible element which .-is connected with the front end of the foremost cutter serves :as a means for drawing thecutter through the pipe or conduit 14. e

A plurality of cutter blades 15 are provided between the ends 'of the cutter, and the portion of the blades adjacent the ends thereof are of a size and configuration to fit within the respective .slots The extremities of .the blades are deflected or bent over as at 16 against the outer faces of the discs 10-11 :and may be fastened by means of a suitable fastening device 17. i

V The blades 15 may be of any desired length and are preferably rectangular in cross section andare spirally twisted'so that one end of the blade will be secured .to one of the heads substantially-at a right'ran le to 16 the pomtat w-hich-theaother end of the. lade 1s secured to the other head.

7 One edge of the blade is beveled or shaped to form .a cutting edge 18 and the cutting edge is exposed throughout the length of the blade and is also spirally shaped from one end -of the blade to the other end thereof. a

With this improvement it will be manifest thatwhen the cutting element is drawn 3 through the pipe or conduit the cutter will be rotated by the engagement f the blades thereof with "the material in the pipe, owing to the fact that the spiral twist of the blades will cause an axial rotation to be imparted to the cutter, the swivel bolts 13 permitting a free rotation of the elements.

In use a plurality ofthese elements are connected one to the other by means of a flexible member 19, such as a chain or cable and are preferably spaced from each other for a considerable distance. The cutters are preferably arranged so that they will in crease 1n size from the forward to the rear end of the series of cutters, each cutter rotatmg independently of the other.

After the cutter has been drawn through the pipe or conduit, the material or deposit will be cut and to such an extent that it may be readily removed by flushing the pipe or otherwise.

In Figure 6, there is shown another form of the invention in which the cutter 20 is rovided with a shaft 21 projecting laterally beyond its faces and which shaft terminates preferably in eyes 22 to which the cable or chain is connected for drawing the cutter through the pipe.

Blades 23 are spirally shaped to form spinner elements which are connected to the shaft 21 on each side of the cutter and by means of which blades 23 the cutter will be axially rotated during the progress through the pipe, by the engagement of the blades 23 with the material in the pipe.

\Vhile the preferred forms of the invention have been herein shown and described, it is to be understood that Various changes may be made in the details of construction and in the combination and arrangement of the various parts", within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is 1. A cutter of the character described including spaced heads, a swivel bolt connected with one of the heads, and cutter blades, the ends of the blades being secured to the respective heads and spirally twisted in a direction from one of the heads to the other head, one edge of the spirally shaped blade being shaped to form a cutting edge, the said cutter being axially rotated with respect to the said swivel bolt by engagement of the cutter blades with the material in the pipe as the cutter element is advanced in the pipe.

' 2. A cutter of the character described adapted to be moved through a pipe or conduit and embodying spaced heads, cutter blades secured by their extremities to the respective heads,'said blades being spirally twisted in a dire'ction lengthwise thereof and from one of the said heads to the other head, and eyelike members individual to and swiveled in each of the heads of the cutter and projecting therebeyond, the said blades operating t9 axially rotate the entire cutter element with respect to the said eyelike members, by engagement with the material in the pipe as the cutter element is advanced in the pipe.

3. A cutter of the character described including a plurality of cutter elements spaced from each other and arranged in tandem, eyelike members swiveled to the ends of each of the cutter elements, the said eyelike members of the respective cutter elements being independent 01": each other, said cutter elements embodying longitudinally twisted blades, said blades operating to axially rotate the respective elements with relation to the said eyelike members by contact with the material in the pipe as the cutter is drawn through the pipe, and flexible members connecting proximate eyelike members on the adjacent ends of the cutter elements.

4. A cutter of the character described including a plurality of cutter elements spaced from each other, eyelike members swiveled to the ends of each of the cutter elements, the said eyelike members of the respective cutter elements being independent of each other, said cutter elements embodying longitudinally twisted blades, said blades operating to axially rotate the re spective elements with relation to the said eyelike members by contact with the material in the pipe as the cutter is drawn through the pipe, and flexible members connecting proximate eyelike members on the adjacent ends of the cutter elements, the said cutter elements being arranged in tandem, each of the cutter elements being of a different size than the next adjacent cutter element.

In testimony whereof I have signed my name to this specification, on this 12th day of January, A. D. 1925.

GEO. E. MOGRATH,

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