US3582126A - Concrete pipe-lifting device - Google Patents

Abstract

A pipe-lifting device including a pair of upright rods, each with an oblique lower portion to slip through the lifting hole of a concrete pipe, one of the rods being swingably mounted on the other to swing the oblique lower end to the opposite side of the lifting hole for underlying the wall and cooperating and lifting the pipe.

Description

United States Patent Inventor Terry R. Bladbolm Marshall, Minn.

Appl. No. 854,556

Filed Sept. 2, 1969 Patented June 1, 1971 Assignee Bladholm Bros Culvert Company Osseo, Minn.

CONCRETE PIPE-LIFTING DEVICE 4 Claims, 3 Drawing Figs.

Int. Cl B66c 1/42 Field of Search 294/26, 27,

[56] References Cited UNITED STATES PATENTS 2,5 84, l 24 2/ 1952 Gustafson 294/93 3,284,125 11/1966 Blaske et al..... 294/97(X) 3,307,871 3/1967 Russell et a1 294/97(X) Primary ExaminerEvon C. Blunk Assistant Examiner-Johnny D. Cherry Attorneyswilliamson, Palmatier and Bains, George F.

Williamson, H. Dale Palmatier and Herman H. Bains ABSTRACT: A pipe-lifting device including a pair of upright rods, each with an oblique lower portion to slip through the lifting hole of a concrete pipe, one of the rods being swingably mounted on the other to swing the oblique lower end to the opposite side of the lifting hole for underlying the wall and cooperating and lifting the pipe.

PATENTEUJUN Han 3.682.126

I N VEN TOR. 7Z PEV E 8440/ /04! /wwam m ATTOP/VEVS CONCRETE PIPE-LIFTING DEVICE BRIEF SUMMARY OF THE INVENTION This pipe-lifting device is of simple and rugged construction so that it may be used to efficiently help lift'concrete pipes that may be 30 to 36 inches in diameter, or pipes that may be somewhat smaller or larger than these dimensions. The device does not require a person to get inside the pipe for fitting it to the pipe, and will surely and positively hold the pipe during lifting. This device is simple to construct and may be easily maintained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevation view of the device applied to a concrete pipe. I I

FIG. 2 is a detail section view taken approximately at 2-2 in Figure 1.

FIG. 3 is a detail section view taken approximately at 3-3 in FIG. 2. j

The pipe-lifting device includes a rigid shank or frame I having an eyelet 11 at its upper end to be thereby adapted for connection to a lifting chain 12, and thereby to a hoist which may take the form of an overhead crane, or the bucket on a front end loader or any similar type of lifting tool. The upper portion of the shank-l0 normally is suspended in upright position and the lower portion 13 extends obliquely with respect to the upper portion thereof.

A rigid bearing sleeve 14 is affixed as by welding to the shank l0, andhas a short flange or lip 15 extending outwardly in one direction from the upper edge thereof. A lifting rod I6 has its upper end extending into the bearing sleeve 14, and a rigid plate 17 is affixed as by welding to the upper end of the rod 16. The plate 17 bears downwardly against the upper edge of the sleeve 14 so as to carry the weight of the rod I6 and also anything supported thereon.

The plate 17 serves as a handle, and is provided with an aperture which is aligned with the aperture in flange 15 so that a pin 18 can be extended therethrough for retaining the rod 16 in the position shown in FIG. 2. The rod 16 has an obliquely extending lower end 19 which can be swung into juxtaposition and substantially parallel relation with the lower end 13 of the shank l0, and also to the opposite position wherein the lower end 19 of rod 16 extends across the lift hole H in the concrete tile T.

The pin 18 will retain the shank I0 and rod 16 in the relative position shown in FIGS. 1 and 2, but simply by removing the pin 18, the rod 16 can be turned in the sleeve 14 and into the dotted position shown in FIG. 1, whereupon the device can be readily and easily removed from the lift hole of the tile T and in similar fashion extended into the lift hole of another tile T.

It should be understood that, in the operation of this device, it will normally be oriented so that the lower ends 13 and 19 of the shank and rod extend generally along the tile or pipe rather than transversely thereto. As a result, because of the oblique orientation of these lower ends, the device will have no tendency to release itself from the pipe and there will be practically no pressure on the pin 18, even while the tile is being lifted.

Of course, the pin 18 may be retained by a chain 20 so that it will not be lost.

It will be seen that I have provided a new and improved pipe lifting device which can be readily and easily applied and removed to a concrete pipe with a lifting hole formed therein and which may be applied from outside the pipe by simply inserting the two rods through the lift hole and then turning the one rod with respect to the other so that the lower ends thereof extend obliquely from each other and under the adjacent portions ofthe pipe wall.

What I claim is:

l. A concrete pipe-lifting device comprising a rigid lifting shank having a normally upright upper portion for connection to a hoist and a transversely extending lower portion to be removabl extended through the lift hole of the ipe and beneath t e wall of the pipe adjacent the hole for lifting the P'P a rotatable rigid lifting rod having an upright mounting end lying along the upper portion of the shank to revolve on a vertical axis, the lower end of the rod extending transversely of the upper end to swing to a position in juxtaposition with the lower portion of the lifting shank for insertion through and removal from the lifting hole of the pipe, and to also swing to a position opposite the lower portion of the shank and beneath the wall for lifting the pipe, and

bearing means on the upper portion of the shank and journaling the mounting end of the rod for turning about the vertical axis and preventing downward movement with respect to the shank, whereby to securely hold the pipe for lifting.

2. The invention set forth in claim 1 wherein the lower portion of the shank extends downwardly and obliquely with respect to the upper portion thereof, and the lower end of the rod extending obliquely with respect to the mounting end thereof, for readily and easily inserting the shank and rod through the lift hole of the pipe and then spreading the lower end and lower portion of the rod and shank, respectively, to lift the pipe.

3. The invention set forth in claim 2 and the upper and lower portions of the shank lying in a common plane, the bearing means also lying in said plane whereby the lower end of the rod will be directly across the hole from the lower portion of the shank.

4. The invention according to claim 1 and including means for holding the rod with the lower end thereof positioned opposite the lower portion of the shank at the opposite side of the lifting hole.

Claims (4)

1. A concrete pipe-lifting device comprising a rigid lifting shank having a normally upright upper portion for connection to a hoist and a transversely extending lower portion to be removably extended through the lift hole of the pipe and beneath the wall of the pipe adjacent the hole for lifting the pipe, a rotatable rigid lifting rod having an upright mounting end lying along the upper portion of the shank to revolve on a vertical axis, the lower end of the rod extending transversely of the upper end to swing to a position in juxtaposition with the lower portion of the lifting shank for insertion through and removal from the lifting hole of the pipe, and to also swing to a position opposite the lower portion of the shank and beneath the wall for lifting the pipe, and bearing means on the upper portion of the shank and journaling the mounting end of the rod for turning about the vertical axis and preventing downward movement with respect to the shank, whereby to securely hold the pipe for lifting.

2. The invention set forth in claim 1 wherein the lower portion of the shank extends downwardly and obliquely with respect to the upper portion thereof, and the lower end of the rod extending obliquely with respect to the mounting end thereof, for readily and easily inserting the shank and rod through the lift hole of the pipe and then spreading the lower end and lower portion of the rod and shank, respectively, to lift the pipe.

3. The invention set forth in claim 2 and the upper and lower portions of the shank lying in a common plane, the bearing means also lying in said plane whereby the lower end of the rod will be directly across the hole from the lower portion of the shank.

4. The invention according to claim 1 and including means for holding the rod with the lower end thereof positioned opposite the lower portion of the shank at the opposite side of the lifting hole.

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