US1590193A - Excavator - Google Patents

Description

A. M. HOOD June 29 1926.

EXCAVATOR Filed Jan. 8, 1925 INVENTOR. A flrZ/mrM. H0005,

A TTORNEYS Patented June 29, 1926.

UNITED 'smrss ARTHUR M1. HOOD, OF INDIANAPOLI$, INDIANA.

Application filed January The object of my invention is to produce an. excavator of" the dipper type in which the digging swing and forward crowd is accomplished by a. single cable and the return lift and resistance to crowd is accomplished by an independent coordinated lifting means.

The accompanying drawings illustrate myinvention.- Fig. 1 is a side elevation largely diagrammatic in character, illustrating an embodiment of my invention and Figs. 2 and 3 are diagrammatic illustrations of equivalent rope reavings.

Inv Fig. 1 10 indicates. a. suitable supporting structure as, for instance, a truck which may be motorized, the truck being provided with. a turn table- 11, an, anchorage mast 12 and a motor 13 equipped with two winding drums 14 and 15, all being of common construction andthe axis of the turn table 11 being vertically beneath the upper end of theanchorage mast. 12. The above described construction: maybe oi -any ordinary wellknown character.

Supported upon turn table 11 is an upwardly and outwardly extended boom 16 supported at a desired inclination from the upper end of mast 12 by a stretcher bar 17 and suspension cables 18. Mounted on the outer end of boom 16 is a sheave shaft 20 upon which is journaled a sheave 21. r

Boom 16 is conveniently formed of two parallel laterally spaced channels so that the sheave 21 may lie between the channels as indicated.

Journaled upon shaft 20 is a swinging yoke 23 which forms a guide for a dipper handle 24 which is conveniently made of two parallel spaced channels, one lying upon each side of the sheave 21 and lying between the channels of boom 16, the arrangement being such that the dipper handle 24 is freely slidable in yoke 23 and is swingable about shaft 20 as an axis. The outer end of the dipper handle 24 carries a dipper 25 of any well-known form, the details of which form no part of my present invention.

The upward retracting movement of the dipper handle is accomplished by a pull back cable 26 in the present instance anchored to the outer end of the dipper handle. Of course it will be understood that cable 26 may be associated with the dipper handle 24 in any desired manner so 8,, 1925. Serial No. 1,138.

that a pull on the cable will serve to shift the dipper handle longitudinally inwardly.

around the sheave of a snatch block 31 car'- ried at the outer end of the yoke 32 pivoted at 33 upon boom 16.jthence forwardly around sheave 21, thence around sheave 34 at the inner end of dipper handle 24 and thence to a yoke 35 anchored conveniently .upon shaft 20. Anchored upon the outer end of yoke 32 is the lifting cable 36 which passes down over a sheave 37, coaxial with sheavew28, thence down through'the turn table and'around a sheave 38 coaxial with the sheave '29 and thence to the winding drum 15. i

A pull upon cable 36 will act upon cable 30 to simultaneously swing the dipper 25 upwardly and crowd the dipper handle 24 outwardly, the extent of the crowding movement being determined by the extent to which cable 26 is released or held against movement.

In Fig. 2the cable 30 is anchored at one end to the inner end of the dipper handle, passing thence to and around snatch block 31, thence around sheave 21 to and around sheave 34, thence around sheave 21 coaxial with sheave 21, and thence to an anchorage at the inner end of the handle.

In Fig. 3 the cable 30 is anchored at one end to the snatch block 31, passes from thence to and around a sheave 34 coaxial with sheave 34, thence to and around the sheave of snatch block 31, thence to sheave 21, thence to and around sheave 34 and thence to an anchorage on shaft 20.

It will be readily understood that an al most infinite variety of reavings of the cable 30 may be utilized without departing from my invention. I

I claim as, my invention:

1. An excavator comprising a boom a dipper handle slidably and swingably lmounted upon said boom, a lifting cable anchored upon the boom and passing from thence around a sheave on the inner end of end of the dipper handle, and a connection between said snatch block and winding mechanism.

2. An excavator comprislng a boom, a d pper handle slidably and swingably vmounted upon said boom, a lifting cable anchoredupo n the boom and passing from thence around a sheave on the inner end of the dipper handle, thence arounda sheave on the boom, thence around a snatch block supported upon the boom and thence to an anchorage on theinner end of the dipper handle, and a connection between said snatch block and winding mechanism.

3. An excavator comprising ahandled dipper, a support on which said handle is slidably and swingably mounted, a cable having one end anchored on the support the other end associated with one end of the handle and an intermediate bight in end thrust engagement with the handle, a snatch block engaging an intermediate portion of said cable and supported on said support, means for shifting said snatch block, and means for resisting the end thrust of said bight.

4:. An excavator comprising a handled dipper, a support on which said handle is slidably and swingably mounted, a cable hav- .sociated with said support and with said handle at two points to exert an end thrust and a swing thereon,-a snatch block engaging an intermediate portion of said cable, means for shiit'tin said snatch block, and

means for resisting the aforesaid end thrust.

6. An excavator comprising a handled dipper, a support on which said handle is slidably and swingably mounted, a cable associated with said support and at two points in its length with said handle at one end thereof to exert end thrust and a swing thereon, a snatch block engaging an intermediate portion of said cable, means. for shifting said snatch block, and means for resisting the aforesaid end thrust.

In witness whereof, I have hereunto set my hand at Indianapolis, Indiana, this 6th day of January, A. D. one thousand" nine hundred and twenty five.

ARTHUR M, HOOD.

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