US915454A - Dredger-head. - Google Patents

Description

R. A. LOWE.

DH1-:Dem HEAD. APPLICATION FI-LBD APR. 20,-1908.

Patented Mar. 16, 1909;

"Duiuth, invented certain new and useful Improve- .UNITED sTATas PATENT onirica.

i ROBERT A. LOWE, OF DULUTH, MINNESOTA', ASSIGNOR OF ONE- HALF TO W. H. LAMSON, OI"

HINCKLEY, MINNESOTA.

DREDG-ER-HEAD.

Spearman@ of Letters Patent.

Patented March `1 c, 1909.

Application ined April 2o, isos. Serin No. 428,002.'

To all whom 'it may concern:

Be it known that I, ROBERT A. LOWE, of St. Louis county, Minnesota, have ments in Dredger-Heads, of which theffollowing is a specification. r

My invention relates to dredger heads adapted for use in connection with asuction ump.

The object of the invention is to provide means wherebythe. dredger head is adapted particularly for work in a bank or on a hard iottom. f

A further Objectis to provide a dredger head 'having `a 'large capacity and' one that will be positive in its action and easily operated.

The invention consists generally in a dredger head having a nozzle adapted.v to

discharge a jet against the bank or surface where the head is operating.

Further, the linvention consists in providing a rotary carrier near the mouth of the dredger head.`

Further, the invention consists in means for directing a jet upon the material directed into the head by the carrier.

Further, the invention consists in means for directing a stream against'the blades of the carrier.- l f Further, the invention consists invarious constructions and combinations, all as here? inafter described and particularly pointedl 'out'in the claims.

In the accompanying drawings, forming part. of'this specification, Figure 1 is a sectional view of a dredger head embodying my invention. Fig. 2 is an outside view of the same illustrating a modification in the'position of the pipes on the dredger head. head, and, Fig. 4 isa transversesectional view 'of the same through the revolving carrier.

shown). l

sides and at one end and has an opening orl In the drawing, 2 represents the dredger pipe 4 leading toa centrifugal pump (not The dredger head is closed on the mouth .5 through which the material passes .into the chamber 3." -Ashaft 6 is mounted in bearin s 7 inthe Wall of the head 4and carries a' revo ving carrier 8 vhavin a series of blades which sweepv around in t adapted to throw hard bank or bottoni.

Fig.l I3 is a detail sectional view of the dredger e .mouth .of the dredger 'head and direct the material into the chamber 3. This wheel or carrier is arranged t'o operate slowly, and for the purpose of loosening the material when the machine is operating in a hard bank I provide a pipe 9 arranged on the inner or outer surface of the dredgerhead and terminating in a tapered nozzle 1() which is adapted todirect a jet` of Wateragainst the surface to bc dredged, and loosen the same and direct it into the mouthofwthe dred er -lie'ad where it will be caughtby the revo ving wheel 8. The pipe 9 communicates with a force pump land is a very strong stream ofv Watercapable ofiloosening. the gravel in a The force of the stream is increased by providing the tapered nozzlelO. In addition to the pipe 9 I prefer to provide a pipe 11 communicating with a ort' 12 in the Wall of the chamber 3 and in the rear of the wheel 8.- This pipe 11 is also connected with the force pump and is intended to supply water to the chamber 3 for the purpose of rendering the material therein of proper 'consistency to pass to and through the suction pump. This pipe '11 connected with a separate puin 3 may bein use or not, as preferred.

A small nozzle 13 is formed in the wall of the chamber 3 and communicates with the pipe 9 and is adapted tovdirect .a strea-m against the blades of the Wheel 84 and keep themclean. The wheel 8 has two functions,

one as a carrier and the other as an indicator to aid the o erator in determining the amount of vmateria entering the dredger head. In case itis found that an ins'uicient amount of water is entering the dredger head additional 'pumps may be attached to the pipe 11 and a arger supply of water taken in.-

. donot wish to be confined to the form of carrier or wheel illustrated herein as I may use any rotatin device adapted to direct the material into t e chamber, in combination with one or more jets forloosening the'material. I may' also increase the number of jets for sup` lying Water to the dredger head chamber. f nva'rious other ways the details of my` invention may be y'rnodiied without departing from the spirit thereof.

I claim as my invention 1. A dredger head having an intake opening and a chamber in. the rear of said opening 'and a nozzle arranged to project a jet against the material in front ofv said opening and a suction pipe communicating v'vith said head between said openingand said chamber.

2. A dredger head having an intake opening and a nozzle located on the Wall of said of said opening and means located near the mouth of said opening for directing the Iriaterial enteringtherein to said chamber.-

. 4. A dredger head having an intake opening, and a chamber in the rear of said opening, a suction pipe communicating with said head between said opening and said chainber, and a material carrier located 'in said head intermediate to said opening and said suction pipe. l

5. A dredger head having an intake opening, a material carrier located in said head contiguous to said opening, and a nozzle arranged to direct ajet in front of said opening andsaid carrier, substantially as described.

6. A dredger head having an intake opening and a chamber in the rear of said o ening, a suction pipe communicating wit said chamber and arevolving Wheel located be'- tween said suction pipe and said opening and in front of said chamber.

7. A dredger head having an intake opening, a suction pi e and a wheel havingfa series of blades provi ,ed with flat surfaces and ar' ranged in said opening and extending from side to side thereof, said Wheel having a slow revolving movement, substantially as de scribed.

8. A dredger head having an intake open-` ing and a chamber in the rear of said o ening, a suction pipe communicating wit chamber, means interposed between said opening .and suction pipe for directin the material into said chamber and a nozz e arrangedto direct a stream into said head in the rear of said conveying means.

9. A dredger head having an intake opening and aichambei' in the rear thereof and a suction pipe communicating with said chama carrier contiguous to said opening for directing the material'into said chamber andl said driving shaft therefor.

said

extending para nozzles having jets arranged to roject streams of Water in front of and in the rear of said carrier.

10. A dredger head having an intake opening, a carrier having blades located in said head near said opening and a nozzle arranged to direct a stream upon the surfaces of said blades, for the purpose specified.

11. A dredger head having an intake opening, la suction pipe communicating there- With, and a nozzle arranged to direct a stream across said headland lengthwise in said suction pi e for the purpose specified.

12. dredger head, having an intake pening and nozzles arranged to project jets in front Ofiand in the rear of said opening.

13. .A dredger head, having an intake opening,`nozzles arranged to project jets in front of and in the rear of said opening, and a material carrier operating between said nozzles.

14. A dredger head having an intake opening, a suction pipe and a nozzle arranged to project a jet lengthwise in said pipe and a carrier located between said opening and said nozzle. l

15. A dredger head, having an intake opene ing and a chamber in the rear of said opening and a suction ipe communicating With said head, interme iate tosaid chamber and said opening.

16. A dredger head, having an intake opening, a suction pipe communicating with said head and a material carrier intermediate to -said opening 'and said suction pi e.

17. A dredger head, having an intake opening, a suction pipe communicating with said head, a revolving carrier interposed between opening and said suction pipe and a 18. A dredger head, having an intake o en.- ing, a suction pi e therefor, a driving siaft lelsubstantially With said. su ction pipe, and a Wheel carried by said driving shaft and operating in said opening.

In witness whereof, I have hereunto set my hand this 13th day of April 1908.

ROBERT A. LOWE.

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