US2621816A - Rapid excavation machine - Google Patents

Description

9% 1952 P. J. M. T. ALLARD RAPID EXCAVATION MACHINE 3 Sheets-Sheet 1 Filed Aug. 7, 1951 my Jean Marie. Tqodore AHm-d '1 (Lou. 0.0 1AM (L M YS.

1952 P. J. M. T. ALLARD RAPID EXCAVATION MACHINE 3 Sheets-Sheet 2 Filed Aug. 7, 1951 Rim; zvmmm. Tkodore Rum \Nv ENT K Mmsbom Defi 1952 P. J. M. T. ALLARD RAPID EXCAVATION MACHINE 3 Sheets-Sheet 5 Filed Aug. 7, 1951 u U u li Q4. ATTYSI Patented Dec. 16, 1952 OFFICE RAPID EXCAVATION MACHINE Pierre Jean Marie Theodore Allard, Eaubonne, France Application August 7, 1951, Serial No. 240,701 In France October 3, 1950 1 Claim.

The present invention has for its object to provide a machine to perform rapid shallow excavations and adapted in such a manner that the movements are simplified obtaining a very short cycle of operations, thereby considerably increa ing its possibilities.

The arrangement employed enables by a simple action a very rapid casting of the earth excavated by the excavation tool from one part of the machine to another, and also enables the positioning and return of the machine to be accomplished in a very short time.

To this end, the machine comprises a chassis carried by wheels or Caterpillars and supporting a jib pivotally mounted on a horizontal axis so as to take up a raised working position or a lowered transporting position, a grab-bucket or other excavating tool connected to a hoisting winch by a cable passing round a pulley at the head of the jib, a hooking device such as a clamp collar to hold the excavating tool to the chassis in the transporting position and at least one unloading tray adapted to oscillate about a vertical or slightly oblique pivot so secured to the chassis as to allow the tray being brought under the excavating tool when the latter is suspended from the jib in the raised position and its being laterally displaced for emptying the material it contains at the side of the machine.

Other features will become evident in the description to follow:

In the accompanying drawings:

Fig. 1 is a side elevation of an embodiment of the machine in working position.

Fig. 2 is a scrap-view in elevation of the ma chine in an intermediate position.

Fig. 3 is a side elevation of the machine idle or ready for transport.

Fig. is a plan view of the chassis of the machine;

Fig. 5 is a front view corresponding to Fig. 1;

Figs. 6, '7 and 8 are details of certain accessories.

In referring to the drawing, a machine is shown comprising a chassis i carried by Wheels 2, preferably independently suspended, the front axle 3 connected to the tow-bar 4 being mounted on a pivotable shaft 5 secured to the chassis.

Lifting-jacks S are preferably provided at the front and at the rear to relieve the wheels of the load and to eliminate the effect of the suspension when the machine is in the working position.

A motor l driving, through a belt 8, a winch 9 controlled by a lever I0, is mounted on the chassis I At the rear of the chassis l is a frame ll supporting a jib of two columns 12 mounted oscillable on axes l3 carried by the frame each one of which having a sector [4 round which is wrapped a cable or chain l5 that then passes round a fixed return pulley l6 and a mobile pulley ll, its other end being secured at It] to the chassis I. The mobile pulley I! is carried by a bar 19 sliding in cylinder 23 under the action of a spring 2! the tension of which is regulated so as to balance the weight of the jib l2.

At its other end the jib i 2 carries cheeks or sides 22 to support a pulley 23 and two hooking members 2% for chains 25 from which is suspended a crown 26. The sides 22 are also connected by two cables 21 to stretcher screws 28 coupled to the frame H, the cables 27 serving thus to maintain the jib l2 in the raised oblique working position shown in Fig. l. The excavating tool is constituted by a grab bucket 29 adapted to be coupled to the crown 26 in the raised position of the jib and suspended by a cabl 30 pass ing through the crown 26 over pulley 23 and wound round drum 9.

On the jib i2 is placed a roller 3! for guiding cable 39 and situated, when the jib is in the working position of Fig. 1, directly above a collar 32 carried by the frame I I the mobile elements 33 of which may be closed round the body of the bucket 29 when this is brought against the frame H as shown in Figs. 2 and 3. The bucket has on its periphery blocks 29 having a chamfered recess 29* corresponding to a chamfered male piece 32 of the elements of the collar 32--33 so as to ensure the support of the bucket in the case of the collar unfastening (see Fig. 6)

The fixed part 32 of the collar is held by the frame H by means of a horizontal pivot pin 33a.

At the two ends of the rear cross-frame 34 of the chassis l are secured two supports 35 having vertical or slightly oblique pivots about each one of which is adapted to pivot an arm 31 having a knee-joint 38 and carrying a tray 39 with holding handles 40. The tray 39 is mounted on the arm 37 by means of sleeves 4| through which passes tube H a so as to enable the plate 39 to tilt up about tube M The distance from the centre of the plates 39 to the vertical pivot post 36 is such that it may be brought under the bucket 29 when the latter is freely suspended in the raised Working position as shown in Fig. 1. A stop 4| adjustably positioned on tube 4 l a between the sleeves 4| permits, in altering its position, the variation of the position of the tray 39 on the tube M The machine may have two trays 39, used t gether or separately, or a single tray that may be, as desired, mounted on one or other of the two posts 36.

The chassis has in the front two tubular posts 46, preferably as an extension of the front lifting jacks 6, and comprising telescopic elements 41 adapted to be maintained at desired heights by pins 48. The elements 4'! are connected by a cross piece 49 adapted to support the jib I 2 in the transporting position (see Figs. 3 and 8). The cross piece 49 has at its supporting face prefer-- ably a block of wood or rubber.

A strap or collar 50, connected to the ends' of the elements 41, allows simultaneously the fastening down of the jib 12 in the transporting position and the retaining of the crown 26 in a cradle provided on said jib.

The operation of the device is as follows:-

The machine being in the position in Fig. 1 and the tray 39 placed to the side to allow the passage of the grab bucket 29, the latter is lowered into the excavation 42 from which it is raised full of earth, to be hooked to the crown 26. The tray 39 is then, by means of the handles 40, brought by rotation round-the post 36 below the grab bucket 29 which is opened and emptied onto the tray plate 33; the latter is then swung to the side indirection F'and when it reaches the extreme side position it is tipped, still by means of the handles 40, about the tube 41 which permits that the earth is tipped onto a heap 43 at the side of the machine.

To put the machine into the transporting position, the bucket 29, after having slightly moved its position, is placed on the ground-then after slackening the cable 30 the latter is passed round the roller 3| and is pulled so asto' raise the bucket 29 directly under the roller and to bring it into the collar 32, the mobileparts 33 of which are closed round it and fastened,the'assembly is then as shown in Fig. 2. The-cable 30 is then further slackened and either 'bypulling directly on it or by pulling on an auxiliary cable 44 (Fig. 2) fastened to the sides 22,'the jib I2 is swung in direction F1 until it rests upon the cross-piece 49.- The strap 50-is then closed upon the crown 26. The assembly is then in the transporting position shown in Fig. 3. If it is preferable for transporting, the bucket 29 may beputtioned above that its pivot post 36 on the chassis I may be slightly oblique so that the tray describes an arc in an inclined plane, the higher point being either on the bucket 29 side to de crease the height of fall of the earth and avoid for example splashes of water, or on the heap 43 side to allow an increased heap height. The knee-joint 38 allows the tray 39 to be raised so as to bring it against the frame II in the transporting position or to enable it to be emptied at a point higher than its normal plane of movement.

Of course the invention is not limited to details of construction set forth which have been given only byway of example. For instance, for the balancing of the jib l2, a counterweight, a pneumatic-device or any other suitable means may be'emplo'yed.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

An excavating machine-comprising in combination a chassis, a frame, a jib, said jib being pivotally mounted on said chassis to take selectively a raised wcrking position and a lowered transporting position, said frame being mounted on said chassis, an excavating device, such as a grab bucket, a pulley, a hoisting winch and a cable, saidpulley being rotatably mounted on the upper end of said jib and said cable being adaptedto connect said excavating device to said winch and passing round said pulley, hooking means such as a clamp collar to hold said excavating device to said frame in transporting position, at least one unloading'trama substantially verticalpivot secured to said frame for pivotally mounting said tray and allowing it to be brought under said excavating'device when the latter is suspended from the jib in the raised position and to be laterally displaced for emptying the material it contains at the side of the machine, said tray being'slidably mounted on an arm, an adjustable stop being providedto position at will said trayon' said arm.

PIER-RE JEAN MARIE THEODORE ALLARD.

REFERENCES CITED The following-references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,396,193 Godin Nov. 8, 1921 2,110,566 Allard Mar. 8, 1938 2,336,965 Shoemaker Dec. 14, 1943 2,375,264 Wagner et al. May 8, 1945 2,501,112 Webster Mar. 21, 1950 2,521,832 Cordivano Sept. 12, 1950

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