US2476047A - Ice auger - Google Patents

Description

ICE UGER Filed Nov. 23, 1945 ze BY JO 50 'Z9 l v v /7/ /yli Patented July 12, 1949 PAT ENT F F l-CE ICE'AUGER1 GliffordAKidder, Detroit, Mich.

ApplicationlNovember"23, 1945; SlerialNo. 630,486'

3 claims?. (Cl. Z55-.61);

This. invention: relates i' to boring tools; andV in.. particular,l tofice augers-.forf boringholesl im theA ice, such. as forV fishingV purposes.l

One object of thisinventionfis.to-provideian ice auger, the headofwhich may be formed from a single blank appropriately benttoform a twinlipped cutter.

l Another object isl to provide ablank from which, by simple bending operations; thefcutter.'

` in. any, suitable holder.

Another object is toprovideandce auger of simple andi low cost constructions which is well adapted to. manufacture byl mass production methods.

Another object is to provide an ice auger as set forth in the preceding objects wherein theI curved and bent cutter head is braced and secured to a shaft having an offset cranklike handle for rotating the shaft.

Gther objects and advantages of the invention will become apparent during the course of the following description of the accompanying drawing, wherein:

Figure 1 is a side elevation of an ice auger according to a preferred embodiment of the invention;

Figure 2 is a horizontal section along the line 2 2 in Figure 1, with the cutter head in top. plan view;

Figure 3 is an enlarged side elevation of the cutter head;

Figure 4 is a side elevation of the cutter head of Figure 1 taken at right angles thereto;

Figure 5 is a central vertical section through the palm rest at the top of the ice auger shown in Figure 1; and

Figure 6 is a top plan view of the blank from which the cutter head is formed by appropriate bending operations.

Referring to the drawing in detail, Figure 1 shows the ice auger of this invention as consisting of a cutter head I0 mounted on a shaft II having a lower portion I2, a U-shaped offset or crank portion I3 above which is an upper shaft portion I4. The shaft Il is preferably tubular (Figure 5) with a hollow portion I5 within the upper end of which is secured and rotatably mounted a stub shaft I6. The stub shaft I6 is provided with an annular groove I1 through 2 which passesa pin lffsecured infan axially offset hole I9` (Figure 1). rotate while being retained inthe top portion: I41 of: thers'haeft- Ila Theupper end of the stub shaft 1611s threadedfi as atI 23; andthreaded thereon is a han-d" wheeli 21 having athreadedE bore 22E engaging their threaded portion 2f! of the stub shaft |62- 'Iihet` handiwheel 22'serYves-*as av palm rest for grasping,

'- w-hilethe crank portion I3fis swungthrough an I2 is providedwith-.av longitudinal slot 24 (Figure- 3) for receiving the web portion25lofftheicutter head IQ; it'beingfsecured'therein in any suitable manner, as by weldingr The web 25', whichr isf roughlyZT inthe shape of al truncated` sector of a circle-with a curved upperedge 25l and ay curvedr lower edgeZ'I; atits opposite ends 281 is sharplyf ben-t; andthere joined' to approximately semiconicali cut-ter` blades. 2.9 with cutting edgesD 35; The out optionally provided: with notches 3l; ting edges 3B are displaced outwardly on a diameter passing through the lower shaft portion I2 so that they project outwardly beyond the remainder of the cutter head I0. At the upper corners of the ends 28, braces 32 are provided (Figure 2) extending to the upper edges of the cutter blades 29 slightly rearwardly of the cutting edges 30. The braces 32 are preferably welded in position. The cutting edges 3U and the arcuate bottom edges 33 4of the semi-conical blades 29 are preferably sharpened to provide for efficient cutting action. The method of forming the blank for the cutter head Il) includes as its first step, the stamping of an annular blank 34 out of sheet metal, preferably sheet steel. The dies for this purpose are so formed as to punch out a slightly eccentric circular hole 35 and a tapered slot 36 extending from its widest point 31 to a narrow gap 38 at the periphery 39 of the blank 34. The same dies also preferably form the notches 3| in the cutting edges 33 which form the opposite edges of the slot 36. The periphery 39 is preferably circular, having its center at the point 40, whereas the center of the hole 35 is located at the point 4I.

The blank 34 is then bent in opposite directions along the bending lines 42 and 43, the wings 44 and 45 thus formed being then curved in approximately conical shape to provide the cutting blades 29, the unbent portion 46 forming the web 25 with the peripheral portion 4l thereof between the lines 42 and 43 forming the upper edge 26 of the web 25. The forming of the cutter head This enables. the shaft llto-,

I from the blank 34 may also be done by suitable dies. The cutter head I0 is then secured in the slot 24 at the lower end of the shaft Il by welding or other suitable means. The cutting edges 39 and 33 of the blades 29 may then be sharpened, or sharpened prior to bending the wings 44 and 45 into semi-conical form.

In the use of the invention, the ice auger is held vertically with the palm of one hand firmly grasping the hand Wheel or palm rest 2|, and the other hand with the ngers encircling the olfset or c-rank portion I3 of the shaft Il, with the cutter head l0 resting upon the ice. Downward pressure is then applied upon the palm rest 2| while the crank portion I3 is swung in an orbital path in a clockwise direction. Under this action, the cutting edges 33 and 3U bite into the ice and cut a conical hole through the ice. The chips of ice dislodged during the cutting operation are forced upwardly within the semi-conical spaces between the blades 29 and the web 25, tumbling over the upper edges thereof when these spaces become filled with ice chips. When the upper edges of the blades 29 reach the level of the ice,

the upper portion of the hole of course becomes cylindrical and the hole becomes entirely cylindrical when the cutter head I9 passes entirely through the ice.

While I have shown and described my invention in detail, it is to be understood that the same is to be limited only by the appended claims, for many changes may be made without departing from the spirit and scope of my invention.

What I claim is:

1. An ice auger comprising a rotatable shaft, a

shaft-rotating device on said shaft and a rotary cutter head of approximately frusto-conical form on the other end of said shaft, said head having a pair of Vpartially conical cutting blades connected to said shaft, said blades having sharp lateral cutting edges and sharp approximately semi-circular bottom cutting edges.

wings.

3. An ice auger comprising a rotatable shaft, a handle on said shaft for rotating said shaft, and a cutter head of approximately frusto-conical form on said shaft having a diametrical web with a pair of partially conical cutting blades each connected at one end to an end of said web and having a free end with an inclined sharp cutting edge projecting laterally outward beyond the adjacent web-connected end of the other blade, the bottom edges of said blades having sharp aproximately semi-circular cutting edges arranged in an approximately circular path.

CLIFFORD A. KIDDER.

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

UNITED STATES PATENTS Number Name Date 217,182 Wenchel July 1, 1879 228,485 Sweet June 8, 1880 1,013,823 Sheldon Jan. 2, 1912 1,409,258 Stenger Mar. 14, 1922 1,420,527 Daulton June 20, 1922 2,057,365 Carlson Oct. 13, 1936 2,393,282 Berlin Jan. 22, 1946

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