US2983496A

US2983496A - Earth moving machine

Info

Publication number: US2983496A
Application number: US767942A
Authority: US
Inventors: Louis A Grant
Original assignee: Individual
Current assignee: Individual
Priority date: 1958-10-17
Filing date: 1958-10-17
Publication date: 1961-05-09
Anticipated expiration: 1978-05-09

Description

May 9, 1961 L. A. GRANT 2,983,496

EARTH MOVING MACHINE Filed Oct. 17, 1958 2 Sheets-Sheet 1 INV EN TOR.

Louis AQ ront May 9, 1961 L.. A. GRANT 2,983,496

EARTH MOVING MACHINE Filed oct. 17, 1958 2 sheets-sheet z INVENTOR.

Louis A. Grani ATTORNEY\ United States Patent() 2,983,496 Emmi MOVING MACHINE Louis A. Grant, 501 Virginia Ave., akmont, Pa.

Filed Oct. 17, 1958, Ser. No. 767,942

`3 Claims. (Cl. 26213) This invention relates generally to earth moving machinery and more particularly relates to a` drill! accessory or attachment for such machinery to enable remotely controlled drilling over a wide rangle of tilt relative to the boom, thereby enabling drilling in heretofore inaccessible places. Y Y f An outstanding disadvantage inthe use of pneumatically operated drills or air hammers has been that the operators handling such drills had to be exposed to the dangerof dust and ilying particles of `stone as well as excessive vibration ofthe drill. Y fv An object of the present invention is to provide pivotally movable attachment whereby a pneumatically operated drill or air hammer can be remotely controlled as a component part of an earth moving machine, such as one sold under the trademark Gradall A further object of .the invention is to provide an accessory for yan earth moving machine, which accessory enables turning of a pneumatically operated drill through a wide angular range so as to make the drill useful for a wide variety of applications, such as fordigging brick linings, and those of oxygen furnaces and open hearth furnaces, and similar applications.

Other objects or advantages of the invention will become more apparent from a study of the following description taken with the accompanying drawings wherein:

Fig. 1 is a top, plan view showing a drill mounting or accessory atttached to a boom, shown cut away, and

- illustrating the principles of the present invention.

Fig. 2 isa side, elevational view of the assembly shown in Fig. 1, the dot and dash outline showing the lowermost angular position of tilt of the drill.

Fig. 3 is a side elevational view of a modification including a drill and bucket.

Fig. 4 is a cross-sectional view taken along line 4 4 of Fig. 3; rand l Fig. 5 is a side elevational view of a further modification showing a boom mount which is rotatable about its own axis through an angle of 360. v

Referring moreparticularly to Fig'sl 1 and 2 of the drawing, numeral 2 denotes fa fragmentary portion of a boom of an earth moving machine, such as sold under ICC linkage for effecting such angular movement of the drill comprises a link 15 having an end portion pivoted at 16 to the cradle 6 and another end portion connected to a rocker arm 18 pivoted on shaft 12. Thus an effective parallelogram linkage is provided.- Thus, the crane operator, by well known control means at the cab, after the boom is suitably extended may tilt the rocker arm 18 to any desired angular position about shaft 12 as a center, so as to secure any desired angle of tilt of tool 7a with respect to the boom, through a range of a horizontal position, as shown, to a vertically downwardly positionas illustrated in dash and dot lnies.

Figs. 3 and 4 show a modification which is similar to Figs. l and 2 except that a bucket 19 of conventional type is mounted, at its forward and rearward end portions, to cradle 6 so as -to enable the operator to selectively use either the drill or the shovel 19 depending on the operai rock on the forward motion and then upon rearward the trademark Gradall and which is illustrated in Fig. 5

Numerals

3 and 4 denote clamps for rotatably mounting `a sleeve S which is rigidly secured to a cradle 6. Mounted in the cradle 6 is an air hammer or .pneumatically operated drill 7 which is clamped onto the cradle by means of stationary clamps 8 and 9. The `air hammer 7 is supplied by Iair under pressure through flexible tubing 10V connected to acoupling'll which, in turn, is connected to an air pump or other suitablesource of air pressure mounted on the vehicle. The air hammer 7 has attached thereto a bit or drill 7a which is reciprocated along the axis of the hammer 7 in a well-known manner.

It will appear that the cradle 6 ispivotally movableY through a wide range of angles'relative to boom, extend-Y motion, the shovel 19 .may be used to scoop up the broken rock.V

Fig. 5 shows a further modification of the invention which enables the Gradall operator to move the cradle 28 and drill 30 to anydesired angle of tilt, even in a vertically upward direction. More specifically, the Gradall o-r other earth moving cab 21 has control means by which the boom 24 is pivoted on

brackets

22 and 23 so as to move through a vertical plane. In addition, means are provided, which include gear 27 driven by a pinion (not shown) whereby the entire boom 24 may be rotated through an angle of 360 `about its own longitudinal axis. The boom extension 25, of course, may be telescoped with respect to boom portion 24 so as to extend the length of lthe boom. Thus, not only is the cradle 28 movable about the pivot 29 through an angle of substantially 90, since it is of the same construction as shown in Figs. l and 2, but the entire boom, upon rotation about its own axis, will enable the drill 30 to be moved also throughout a 360 arc in a vertical plane at right angles to the boom and thereby enable movement of the tool throughout a hernispherical path of movement. This is particularly desirable in instances were it is desirable to drill into the roof of a structure or into a portion which is` above the boom.

Thus it will be seen that I have provided an efficient accessory for an earth moving m-achine, vsuch as one known bythe trademark as Gradall, which accessory is readily attachable tothe forward end portion of a boom so it may serve asl a mounting for a drill or other tool and which will enable the tool to be angularly vertically moved from the horizontal position; furthermore, `l have provided ia. further improvement whereby the aforesaid tool may be additionally moved throughout a circle of,

360 in a vertical plane at righit angles to the boom to allow a wide variety of angular movement of the drill or other tool with respect to the boom and thus enable f these are by way of illustration only, and that'variousV changes and modiiications may be'mad'e within the contemplation of my invention and within the scope of the following claims. n

I claim: Y l. An earth moving .machine including a boom, a cradle having an end portion pivotally connected to the free end of said boom, linkage means connecting a free end portion .A of said boom toa portion lof said cradle laterally otset from said pivotally connected, cradle end portion for pivotally moving said cradle through an angle of substantially 90 with respect to the longitudinal axis of said boom, a pneumatically operated tool seated within said cradle, clamp means extending transversely across the top of said cradle for clamping said tool therein, said cradle and tool being so proportioned with respect to the free end portion of said boom so las to be substantially wholly contained within the space defined by longitudinally projecting the free end portion of said boom when the cradle and boom are in a position wherein their longitudinal axes are substantially coextensive with the longitudinal axis of said boom, whereby the drill, cradle and boo-m may be projected through relatively small openings, and whereby the drill may be selectively moved from a position substantially coextensive with the longitudinal axis of said boom to one substantially at right angles thereto.

2. An earth moving machine as recited in claim l together with a bucket suspended by a said cradle to enable selective operation of said tool or said bucket.

3. An earth moving machine including a boom mounted on said machine having telescoping parts and being rotatable about its longitudinal axis throughout an angle of substantially 360, a cradle having an end portion pivotally connected to the end portion of the outermost part of said boom, linkage means connecting said last mentioned end portion toa portion of said cradle laterally offset from saidv pivotally connected, cradle end portion for pivotally moving said cradle through an angle of substantially with respect to the longitudinal axis of said boom, a pneumatically operated, tool seated within said cradle, clamps extending transversely across the top of said cradle for rclamping said tool therein, said cradle and tool being so proportioned with respect to said outermost part of the boom so as to be substantially wholly contained within the space dened by longitudinally projecting said outermost part when the cradle and boom are in a position wherein their longitudinal axes are substantially `coextensive with the longitudinal axis of said boom, whereby the drill, cradle and boom may be projected through relatively small openings, and whereby the drill may be selectively moved throughout substantially a hemispherieal path to enable digging into ceilings, walls and floors at selective angles. v

References Cited in the le of this patent UNITED STATES PATENTS