US3286377A

US3286377A - Trenching hoe having spread footing cutting means

Info

Publication number: US3286377A
Application number: US324940A
Authority: US
Inventors: Glenn H Long
Original assignee: Individual
Current assignee: Individual
Priority date: 1963-11-20
Filing date: 1963-11-20
Publication date: 1966-11-22
Anticipated expiration: 1983-11-22

Description

-Nov. 22, 1966 G. H. LONG 3,286,377

TRENCHING HOE HAVING SPREAD FOOTING CUTTING MEANS Filed Nov. 20, 1963 2 Sheets-Sheet l Ilm 'IIII II I l 26 INVENTOR- 20 31b 26b 26d GLENNH. LONG ATTORNEY Nov. 22, 1966 e. H. LONG TRENCHING HOE HAVING SPREAD FOOTING CUTTING MEANS Filed NOV. 20, 1963 2 Sheets-Sheet 2 INVENTOR. GLE NNH. LONG ATTORN EY United States Patent 3,286,377 TRENCHING HOE HAVING SPREAD FOOTING CUTTING MEANS Glenn H. Long, 3003 Central, Glenview, Ill. Filed Nov. 20, 1963, Ser. No. 324,940

2 Claims. (Cl. 37-118) 1 This invention relates generally to digging implements,

and more particularly to a trenching hoe. including structure for cutting into the side walls of the bottom of a trench to provide a spread footing.

The invention herein has for one of its principal objects the provision of a structure adapted to be employed with a trenching hoe, and including a bucket having diverging wings pivotally mounted at each side thereof which are selectively caused to project outward by an hydraulically actuated toggle linkage. The ability of the device to cut additional cross section at the sides and bottom of a trench to provide a spread footing for a concrete structure thus enhances its usefulness. The diverging wings, being in alignment with the sides of the excavation bucket when not in use, enable the excavation bucket to be used for routine digging work without any additional time wasting operations.

It is another object to provide a trenching hoe bucket with structure enabling the same to fulfill the dual purpose of doing ordinary digging or trenching, with the additional function of the cutting of additional cross section for a spread footing.

Other and further objects of this invention will become more readily apparent from reading the specification taken together with the accompanying drawings which shown a preferred embodiment of the invention wherein:

FIG. 1 is a perspective view of a trenching hoe having the improvements according to the present invention incorporated therein;

FIG. 2 is a sectional view of hoe bucket seen in FIG. 1 taken on a plane passing through the lines 2-2 of FIG. 1, and looking in the direction of the arrows;

FIG. 3 is an end view looking in the direction of the arrows 3-3 of FIG. 2;

FIG. 4 is an elevational view taken substantially along the line 44 of FIG. 3, looking in the direction of the arrows; and

FIG. 5 is a transverse sectional view through a trench that has been widened at the bottom with the improved structure according to the invention.

Referring now to the drawings, the preferred embodiment of the invention is illustrated in FIG. 1, and is embodied in a trenching hoe referred to by the reference numeral 10, and pivotally mounted at an abutment a at the rear of a tractor 11, partially shown. Hoe 10 includes a boom 12 pivotally connected at 12a to the abutment 10a. A dipper stick 16 is pivoted at 16a to the boom 12 and a hoe bucket 20 is pivotally connected at 16a to dipper stick 16.

Hoe bucket 20 is formed of a pair of laterally spaced side plates 20b which are joined by welding to back plates 200, a top plate 20d and a bottom plate 2012. Plate 20d has a pair of cars 21 extending therefrom which flank the dipper stick 16, and the ears 21 are pivotally connected at 16a to the dipper stick 16 by a pin 16b passing through the sides of dipper stick 16 and the ears 21.

An actuating cylinder 22 for bucket 20 lies along the upper side of dipper stick 16, and has a piston rod 22a connected to a pin 22b supported by the ears 21. Actuating cylinder 22 is pivotally connected at 22b to dipper stick 16, and is supplied with actuating fluid by lines 220 from the retractor 11 where control structure, not shown, is located.

Dipper stick 16 is adjusted in its position with respect to, boom 12 by an actuating cyclinder 18 having a piston rod 18a pivotal-1y connected at 18b to dipper stick 16. The other end of cylinder 18 is pivotally connected at to boom 12, and actuating fluid for cylinder 18 is supplied by lines 18d.

Boom 12 is adjusted in position with respect to tractor 11 by a cylinder 19 acting between point19a on abutment 10a and point 19b on boom 12.

Hoe bucket 20 is of a shape which is common to such type buckets, and is provided with an opening 20] in each opposing side wall 20b thereof. The holes 20 are closed by a scraper wing 32, each having a pintle 31 received at their upper and lower ends in pintle holding members 31b secured by welding to the sides 20b of bucket 20. Each wing 31 is substantially trapezoidal in shape with an upper inclined surface 32a and saw tooth ends 32b, and wings 31 are supported near the bottom of bucket 20 in order to widen a trench at the bottom thereof. As seen in FIG..4 openings 20 are substantially the same size and shape as the wings 32, so that wings 32 overlap openings 20).

Cylinder 24 has a piston rod 24b pivotally connected at 26a to a bell crank 26. Bell crank 26 is pivotally connected at 26b to an abutment 26d extending between the sides 20b of bucket 20. Bell crank 26 has an arm 26c connected at 28a to a toggle rod 28. The other end 28b of the toggle rod 28 is pivotally attached to a vertical spindle 30. A pair of toggle arms 29 are pivotally connected at their inner ends to spindle 30, and the other end of each toggle arms 30 is fixed to its corresponding pintle 31. The toggle arms 29 extend from their corresponding pintles 31 at such an angle that when the bell crank is rocked in a counter-clockwise direction as seen in FIG. 4, the two toggle arms 29 occupy a straight away position as seen in FIG. 2, with the corresponding wings 32 in the extended or open position.

Structure is provided to lock the wings in their extended position until the toggle cylinder 24 is actuated in a return direction. Such locking structure insures that the toggle arm-s 29 maintain the straightaway position and includes a locking lug 2% extending downward from the side of the upper toggle arm 29 and a similar lug 29c extending upward from the other toggle arm 29.

In operation, the bucket 20 is moved so that it digs a trench having conventional vertical side walls. The bucket 20 is adapted during or after the trenching operation to cut additional cross section to define space for a spread footing SF, as seen in FIG. 5, when a concrete mass is poured into the trench. When the hydraulic toggle cylinder 24 is actuated, the spindle 30 of the toggle linkage is caused to move into its straightaway position, as illustrated in FIGS. 2 and 4, thereby causing the wings 32 to be in an open position. The movement to open position is done when the bucket is moving, so that the wings 32 have forward motion while extending to give a shearing action at the trench bottom. The openings 20 in the side walls 20b of bucket enable the excavated material to move readily in-to bucket 20.

It will be seen that there has been provided a digging device having the dual function of both conventional trenching and the digging of an extra cross section for a spread footing. The wings being in alignment with the sides of the bucket during normal digging operation enable the same to be utilized for conventional digging, and when the extra cross section is desired at the trench bottom for a spread footing, the wings can be brought into operation.

Although there has been illustrated a novel arrangement including an excavating bucket in the environment of a backhoe having a boom and dipper stick, it is not intended to restrict the invention to the environment shown, and other expedients in the art are contemplated.

While the invention has been described in terms of a preferred embodiment, it is for purposes of illustration only, and the invention is therefore intended to be defined only by the claims here appended.

I claim:

1. An excavation bucket that can be utilized for both trenching and the cutting of additional cross-section at the bottom of a trench comprising: a pair of opposing sides, a pair of diverging wings, each of said diverging wings being pivotally mounted to one of said opposing sides, said diverging wings having open and closed positions, said diverging wings being in alignment with said sides of said excavation bucket in their closed position, said diverging wings projecting outward from said sides in their open positon, said pair of opposing sides have openings that are substantially of the same size and shape as said diverging wings, said diverging Wings being positioned over said openings when in said closed position, and means for selectively actuating said diverging Wings to said open and said closed positions.

2. An excavation bucket as defined in claim 1 wherein a toggle arm is associated with each of said diverging Wings, a spindle disposed between said diverging Wings is pivota-lly associated with said arms to form a toggle linkage, said spindle being in one position When said diverging wings are in said open position, and being in a second position when said diverging Wings are in their closed position, and said means for selectively acuating said diverging Wings is associated with said toggle linkage to move said spindle to its first and second positions, whereby said diverging wings are caused to move to said open position with toggle linkage leverage and provide additional cross section in the bottom of a trench and wherein said spindle cooperates with locking means on said toggle arms to maintain said toggle arms in a straightaway position when said diverging wings are in extended position.

References Cited by the Examiner UNITED STATES PATENTS 9/1951 Markkula.

5/1963 Plath 37118

Claims

1. AN EXCAVATION BUCKET THAT CAN BE UTILIZED FOR BOTH TRENCHING AND THE CUTTING OF ADDITIONAL CROSS-SECTION AT THE BOTTOM OF A TRENCH COMPRISING: A PAIR OF OPPOSING SIDES, A PAIR OF DIVERGING WINGS, EACH OF SAID DIVERGING WINGS BEING PIVOTALLY MOUNTED TO ONE OF SAID OPPOSING SIDES, SAID DIVERGING WINGS HAVING OPEN AND CLOSED POSITIONS, SAID DIVERGING WINGS BEING IN ALIGNMENT WITH SAID SIDES OF SAID EXCAVATION BUCKET IN THEIR CLOSED POSI-