US372956A - Excavator - Google Patents

Description

(No Model.)

- A. B. BOWERS.

EXCAVATOR.

Patented Nov. 8, 1887.

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ALPHONZO R. BOWERS, OF SAN FRANCISCO, CALIFORNIA.

EXCAVATO R.

SPECIFICATION forming part of Letters Patent No. 372,956, dated November 8, 1887.

Original application filed December 9, 1876, and renewed April 1G, 1879. Divided and this application filed July 16, 1887. Serial No. 244,542. (No model.)

To al'l whom it may concern) Be it4 known that I, -ALPHoNzo B. Bownas,

of San Francisco, California, civil engineer, have invented an Improvement in Excavators,

of which this is a description.

This is a ninth division of the application' It consists of a rotary excavator constructed to work with a side feed and either outward or inward delivery, in combination with any suitable device for removing the spoil, said excavator being provided with peripheral spi# rally-arranged edges or blades having a drawing cut, with devices by which these edges or blades are braced and vbound together, and with excavatingedges on its outer end inclined backward from the direction of rotation to avoid hooking against obstructions and to give to these edges a drawing cut.

Figure l is a plan showing one form of this excavator Vin combination with a suitable device for receiving and withdrawing the spoil. Fig. 2 shows the end cutting-edges and lower ring of the excavator. Fig. 3 shows a crosssection through the excavator, through an inner section of suction-pipe sometimes used, and-through the excavator-shaft R. Fig. 4 is a plan of -the lower end of said suction-pipe and of a portion of said shaft.

C may be any of the well-known devices suitable for removing the spoil from either inside or outside of the excavator. As here shown, it is a suction-pipe arranged to take its spoil from the inside, although it may be arranged to take it from the outside also, as described and claimed in the eighth division of the original application. in the device shown, extends into the hollow excavator E, to support the bearing Rl of the shaft R, and is enlarged and cut away on one side to form an opening, G, for receiving the spoil. The excavator and device for removing the spoil, when used for dredging, is usually supported by a swinging ladder suspended from a derrick or crane by a chain attached to the eye c, or to a ring passing around the suctionpipc at this point, the chains that Its lower end, T,

in Letters Patent No. 318,859, issued to me May 26, 1885except that in the present instance all its excavating-edges are constructed and arranged to make a drawing cut, and, like said excavator, some or all of its several parts may be made separate and detachable, or the whole may be cast in a single piece.

The vanes k may consist simply of spiral cuttingblades, of suitable form and strength, cast with or secured in any suitable manner to a hub, R2, in the outer end of the excavator (by which rotation is communicated by any suitable power through the shaft R) and to one or more circumferential ring or rings, by which they are braced and bound together, though, when the excavator is cast, it is better to provide these vanes with detachable steel knives S, extending from ring to ring or from end to end of the excavator, according to the preference of the user or builder. The cutting-edges S and S are set at au angle to give a free clear'- ance and suitable lead.

The stift'ening, bracing, binding rings t are preferably, though not necessarily, made with beveled cutting-edges projecting outward beyond the spiral blades, the more easily to subdivide the spoil, and to serve as fenders to enable these blades to ride over and prevent them from catching against obstructions, and the ring b, on the inner end of the excavator, when used with a central suction-pipe, is preferably extended inward to or near said pipe, where it may be provided with a strong flange to serve as a bearing or hub to run on said pipe, as shown.

I confine myself to neither an inward nor an outward delivery, nor to the devices or vform of construction shown; but, in this ninth division of the original application, I claim- 1. In combination, a rotary excavator co'nstructed and arranged to work with a side feed, provided with excavating edges or blades running spirally along its periphery, a device for bracing and binding said edges or blades together, and a device for removing the spoil.

2. In combination, a rotary excavator provided with excavating edges or blades running IOO spirally along its periphery, a stiffening-ring or stiffening-rings, to which said blades are secured and by which they are braced and bound together, and a suction-pipe for remov- 5 ing the spoil.

3. In combination, a rotary excavator having peripheral excavating devices, spirally arranged, and fenders to prevent the cuttingedges of said devices from catching against 1o obstructions.

4. In combination, a rotary excavator having peripheral excavating devices spirally arranged, fenders to prevent the cutting-edges of said devices from catching against obstructions, and a device for removing the spoil.

5. In combination, a rotary excavator having peripheral excavating devices spirally arranged, fenders to prevent said devices from \eatching against obstructions, and a suctionzo pipe for removing the spoil.

6. In combination, a rotary excavator having peripheral excavating edges or blades spirally arranged, a device for slicing or dividing the spoil delivered by said edges or blades, and

a device for removing said spoil.

7 In combination, a rotary excavator having peripheral excavating edges or blades spirally arranged,adeviee for slicing and dividing the spoil delivered by said edges or blades, and

3o a suction-pipe for removing said spoil.

8. In combination, a rotary excavator pro-` vided with excavating devices having a drawing cut, and fenders to prevent said devices from catching against obstructions.

9. In combination, a rotary excavator provided with excavating devices having a drawing cut, fenders to prevent said devices from catching against obstructions, and a device for removing the spoil.

4o 10. In combination, a rotary excavator provided with excavating devices having a drawing cnt, fenders to prevent said devices from catching against obstructions, and a suctionpipe for removing the spoil.

11. In combination, a hollow rotary excavator provided with excavating devices having a drawing cnt and inward delivery between said devicesto the interior of said excavator, a shaft for actuating said excavator, and a de- 5o vice for removing the spoil.

l2. A hollow rotary excavator with inward delivery and constructed to operate with a side feed and provided with excavating devices having a drawing cut, a shaft for actuating said excavator, and a suction-pipe for removing the spoil.

13. In combination, a rotary excavator consisting of peripheral excavating devices spirally arranged, braced, and tied together by a circumferential ring or by circumferential 6o rings, and firmly connected to a hub in the end of said excavator, an actuating-shaft secured to said hub, a bearing for said shaft in the interior of said excavator, and a suctionpipe opening into said interior for removing the spoil.

14. In combination, a rotary excavator consisting of peripheral excavating devices spirally arranged, braced, and tied together and secured to a hub in the end of said excavator, 7o excavating edges or blades on the end of said cxcavator inclined backward from the direction of rotation, an actuating-shaft secured to the hub and provided with a bearing in the interior of said excavator, and a suction-pipe opening into said interior.

15. In combination, a rotary excavator constructed and arranged to work with a side feed, provided with excavating edges or blades run ning spirally along its periphery and deliver- 8o ing their spoil to the interior of said excavator, and a device for removing said spoil.

16. In combination, a hollow rotary excavator provided with excavating edges or blades ruiming spirally along its periphery and de 85 livering their spoil to the interior of said excavator, and a suction-pipe opening into said interior.

17. In combination, a hollow cylindrical rotary excavator having excavating edges or 9o blades running spirally along its periphery and delivering their spoil tothe interior of said excavator, and a suction-pipe opening into said interior.

18. The hollow rotary excavator E, subg5 stantially as and for the purpose described, in combination with a device for rotating the same.

A. B. BOVERS.

In presence oi` SCHUYLER DURYEE, E. W. B. PHILLrrs.

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