US2249254A - Pickup hook for broken rods - Google Patents

Description

July 15, '1941.

w. D. OSBORN PICKUP HOOK FOR BROKEN RODS Filed Oct. 1l, 1939 Patented July 15, 1941 UNITED STATES ,-PATEN T OFFICE Y 2,249,254 N Y f PICKUP-Hoon EoaBRoKENnoDs William'D. Osborn, LosAngfeleaCalif. Application october 11, 1999, serial No. 298,983

' rola-im. (o1-.'294-19') v 'My invention relates to a hook, particularly ldesigned for engaging Vand removing broken or disjointed rods, such as are used in connection with sewer and other pipe cleaning apparatus,

also thesucker or pump rods used in connection.

with deep well pumps, and, the principal objects of my invention, are to generally improve upon and simplify the construction of the existing forms of broken and disjointed rod pick-up hooks and devices and, to provide a pick-up hook or device that is formed from a single piece of material and which when rotated in a sewer, pipe line, well casing, or the like, will be highly effective in engaging a broken or disjointed rod and automatically clamping the same so that it may be readily withdrawn from the sewer pipe or casing.

A further object of my invention is, to provide a rod pick-up hook or device that is especially designed for use in engaging, picking up, and removing rods having their ends detachably connected by joints and the parts of which joints are somewhat larger in diameter than the connected rods.

A further object of my invention is, to provide a rod pick-up device that is practically automatic in its action of engaging a broken or uncoupled rod and positioning the same so as to effect a connection between a looped portion of the tool and the coupling or joint members between the rod sections, so that the broken or uncoupled rod may be readily removed from the sewer pipe or other line as the tool is withdrawn therefrom.

With the foregoing and other objects in View, my invention consists in certain novel features of construction and arrangement of parts that will be hereinafter more fully described and claimed and illustrated in the accompanying drawing in which:

Fig. 1 is a sectional View taken lengthwise through a duct such as a sewer pipe and showing th-e pick-up tool positioned for use therein.

Fig. 2 is an enlarged top plan view of the rod engaging end of the pick-up tool.

Fig. 3 is a bottom plan view of the rod engaging end .of the tool.

Fig. 4 is an enlarged cross section taken approximately on the line 4 of Fig. 1.

Fig. 5 is an enlarged plan view of the end of the curved arm of the pick-up device.

Fig. 6 is a section taken on the line 6-6 of Fig. 5.

Referring by numerals to the accompanying drawing which illustrates a preferred embodiment of my invention, ID designates a metal rod which may be of any convenient length, for instance, three or four feet, vand mounted on the rear' end 4of'saidirod is a coupling member .II .thatisadapted to engagea complementary mem- -ber` I2fthat -is formed on Atheend of a rod secor other ',pipe 'line :andfor Vmanipulating said tool `after it has'reached .thebrolien ,or disjointed portion of the rod that is to be removed.

The forward portion of rod I0 terminates in an arm I3 that has the general shape of the segment of a helix. The end of this arm is widened slightly and made wedge-shape lenthwise of the arm so as to form a substantially chisel-shaped member I4 and, the forward sharp edge thereof being curved forwardly from one side to the other as designated by I5.

The end of the curved arm I3 opposite the chisel-shaped end I4 is curved inwardly toward the forward end of the straight body portion of the rod I0 as designated by I 6 and, this curved portion gradually approaches the axis of the straight body portion of the rod I0 so as to provide a relatively small open loop II. This loop occupies a. position substantially at right angles to the axis of the straight body portion I0 of the tool and, the opening in said loop is slightly larger than the diameter of the rods used in connection with sewer and other pipe line cleaning apparatus and, said loop being somewhat smaller than the diameter of the couplings between the rod sections.

As a result of this construction, the open loop 'I provides a shoulder against which a rod coupling rests when a broken or disjointed rod has been picked up and is being removed from the sewer or other pipe line.

In the use of my improved rod pick-up tool, the latter detachably connected by means of the coupling members II and I2 to the end of a string of rods is moved into the sewer pipe or other pipe line in which the broken or disjointed rod is located and the tool is moved to a position one or two joints past the broken end of the rod or the disconnected jointand, the tool is now rotated by the application of suitable power to the rod string that is connected to said tool.

As a result of this rotation, the chisel end of the curved arm rides around the inner face of the sewer pipe or other conduit and, as such rotary motion continues, the end ofthe arm I3 passes beneath the broken or disjointed rod as illustrated in Fig. 4 and further rotary movement of the tool will cause the engaged rod to ride along the curved portions I3 and I6 of the tool and said rod will finally pass into the open loop II.

Retractve movement is now imparted to the rod string connected to the tool and, when the loop I'I engages the joint between two of the sections of the broken rod, said joint will bear against the shoulder formed by the loop II and, Aas the tool and the broken or disconnected rod are now practically locked to each other, the broken: or disjointed rod may be vconveniently withdrawn vfrom the sewer or otherlpipe line with the tool.

Among the particularly advantageous features of my invention are, the coupling engaging loop I'I that is disposed at right angl-esto they axis of the straight body portion of thetool, thereby forming an effective shoulder for engaginga coupling in the rod string that is to be removled from a sewer or the like and, the curved arms I3 and I6 which during the rotation of the tool automatically cause the engaged rod to pass into the loop I'I, thus positioning said rod so that one of -the couplings thereof will engage against the loop manufacture and very eifective in performing the' functions for which it is intended.

It will be understood that minor changes in the size, form and construction of the various parts of my improved pick-up hook for broken rods, may be made and substituted for those herein shown and described, without departing from the spirit. of my invention, the scope of which is set forth in the appended claim.

I claim as my invention:

I A pick-up hook for broken jointed rods or the like having joints of greater diameter than that of said rods, comprising an elongated straight and solid shank having front and rear ends, the front end of said shank being formed to provide an open loop having co-planar portions at right angles to said shank, the free end of said loop being extended forwardly thereof in the form of an outwardly diverging helix having an arc of substantially the internal diameter of said open loop being slightly greater than that of a rod andless than that of a joint, whereby said .loop is adapted to freely receive a rod at points intermediate of the joints and be retracted along the rod to bring a joint into engagement with saidvco-planar portions of said loop.

WILLIAM D. OSBORN.

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