US1691540A

US1691540A - Auger

Info

Publication number: US1691540A
Application number: US128083A
Authority: US
Inventors: Birkenmaier Theodore
Original assignee: MATTHEWS W N CORP
Current assignee: MATTHEWS W N CORP; W N MATTHEWS Corp
Priority date: 1926-08-09
Filing date: 1926-08-09
Publication date: 1928-11-13
Anticipated expiration: 1945-11-13

Description

T. BIRKENMAIER AUGER Nov. 13, 1928. 1,691,540

Filed Aug. 9, 1926 Patented Nov. 13, 1928.

UNITED STATES 1 i 1,691,549 PATENT omer.

THEODOBE BIRKENMAIER, OF ST. LOU-IS, SSGN'OR TO W. N. MATTHEWS CORPORA'IION7 OF ST. LOUIS, MISSOURI, A CORPORATION OFMISSOURI.

AUGER.

Appueation mea august 9, 192s. serieu No. 128,083.

rlhis invention relates to angers, and with regard to certain more specific features to earth angers of the type adapted to be cleared at intervals of earth, dbris and the like. f

Among the several object ofthe invention may be noted the provisionV of an auger which is adapted to have certain members or jaws expandedfor the purpose of dislodgm ing bored out material, but which at the same time is adapted to positively prevent said members or jaws from loosening or eX- panding as the boring operation proceeds; an auger of the class describedl which holds said jaws more tightly as boring proceeds; a c e7 vice of the class described which compris-es -but relatively few simple and rugged elements which can be readily and quickly assembled;

and a device of the class described which is simple to manipulate in its applications.

Other objects will be iny part obvious and in part pointed out hereinafter.

The invention accordingly comprises the elements and combination lof elements, features of construction, and arrangements of parts which will be exemplified in thestructure hereinafter described, and the scopeof the application of-V which will be indicated in the following claims.

In the accompanying drawings, in which is illustrated one of various possible embodiments of the invention,

Fig. 1 is a left side elevation of the auger shown in locked, closed or boring position,

certain portions being broken away, and

shows in dotted lines an alternate retracted position of a locking sleeve;

Fig. 2 is a front elevationv of Fig. 1, certain portions being broken away;

Fig. 3 vis a horizontal section taken on line 3-3 of Fig. 2 but shows the sleeve rotated ninety degrees;`

Fig. l is a horizontal section taken on line 1 4 of Fig. 2;

Fig. 5 is a bottom plan view of Fig. 2; and',

Fig. 6 is a view similar to Fig. 2 ona reduced scale showing the locking sleeve retracting and the jaws of the auger opened or expanded for cleaning purposes.

Similar reference characters indicate corresponding parts throughout the several views of the drawings. l

Referring now more particularly toFigs. 1 and 2 there is illustrated at the numeral 1 5 5 av shank upon which are cast or otherwise formed three radially extending lins'. A fourth fin 5, equal in depth to said ns 3 is also provided. The fin 5 carries a longitu-V dinal leg 13 of a slot S. All' of the fins and 5 are preferably formed longitudinally of said shank 1.

The interior of the shank 1 is bored out to receive asuitable torque exerting member or stem 9 on the upper end of whichl is fastened a cross bar or wrench 11. The stem 9 is held in the socket of the shank 1 by a suitable fastening bolt 13, whereb torque may be applied to the shank 1` rom the cross bar or handle 11.

Below the

lins

3, 5, the shank 1 is formed as a semi-circular cylindrical portion 15, the radius of which is such as to align the outer surface of the said

fins

3, 5 with the outer surface of the sem-circular cylindrical portion. lThe lower yend of this semi-circular cylindrical portion 15 is formed with a matching lug 17 which functions in a manner to be described. In one quadrant ofthe circlev which describes the surface of the partial cylinder 15, there is provided a notch 16 Conforming to the shape of said lug 17. A flange 19 is provided at the Vlower end of glie portion 15,'and carries a dependent ear The ear 21 carries two lugs 23 adapted to cooperate with suitable openingsv in a sta# tionary blade 25 and thev blade 25 is yheld to the ear 21 by a suitable screwn27. The outer surfaces of the lugs 23 and the headj of the screw 27 are preferably made flushv with the outer surface of thel blade.y i

The inner flatsurface 29 of the semi-cylindrical or partial rcylinder portionkl'is matched by the flat inner surface of a semi? cylindrical hinging member or partial'cylinder 31. This hinging member 31. is formed to match with the portion 15 inas` much Vas it has a notch 33 adapted to coop.- erate with the lug 17, and a lug 35 adapted to cooperate with said notch 16. It also 10o has a fiange 37 forming a continuation 'of i said flange 19. The flange 37 carries a blade 26 similar to the' blade 25. The fastenings for this blade are similar` to those for blade 25 comprising lugs 23 and a screw 27 carried 105 on another ear 21. The

members

15 and 31 are held together inv a relatively hinging manner by a hinge bolt 39, the head and' nut of which are properly countersunk in the surfaces of the saidfmembe'rs 1,5 and 3.1. 110

may be seen from the above that the members and 31 form a matched cylinder C having a lower flange F, that is, in their mately 90 degrees.

vthe cylinder C (see Fig. 2). Vin which the sleeve locks the blades is posiengages the shallow portion of the slot.

ing position.

closed position. A cylindrical band of material 41 is formed on the portion 15 just under the shank 1. This band has an outer surface iush with the surfaces of the

fins

3, 5, and with said cylinder C.

A tortuous bayonet slotor guide means S is provided in the lin 5 and the band 41. The vertical leg 43 of this slot S is formed in said fin 5, and the horizontal circular portion 45 thereof is formed in the band or belt 41. This horizontal circular portion comprises a full-depth slot overl an arc of 180 degrees (Fig. 3) and thereafter becomes gradually shallower over an arc of approxi- The complete length of the leg45 of the slot S comprises substantially three quarters of a circle.

Slidably fitted over the

fins

3, 5, and the continuing cylinder C, is a locking sleeve 47 which has formed therewith an inwardly projecting lug 49 adapted to slidably engage the bayonet slot or guide means SA throughout the length of said slot. 'The sleeve 47.

preferably comprises a malleable casting, which when vcast has had the lug 49 eX- tending longitudinally, as shown by the dotted lines in Fig. Q. By means offthis method of manufacture the sleeve 47 may be slipped over the

fins

3, 5, and cylinder C, the lug 49 aligned with the leg 43 of the slot S, and the lug 49 giving a blow so as to turn it inwardly into said slot (see Figs. 2 and 3). The relative lengths of the fins 3,

- 5, the cylinder C, and the sleeve 47 are such that the cylinder 47 may be slipped upwardly along the said

fins

3, 5, to entirely clear the hinged cylindrical portion C or may be slipped downwardly to entirely and snugly jacket said cylindrical portion C. When the sleeve is positioned downwardly it rests on the fiange F. It is evident from the above that when the sleeve is in its upward retracted position, that` the blades and 26 may be relatively Vmoved or hinged as shown in Fig. 6. When the sleeve 47 is put into its downward locking position, then the

blades

25, 26 must be in their closed position and are positively held in said positionby the action of the sleeve 47 engaging The manner tive.

Another feature of the operation of this invention is that when the sleeve 47 is put into-its lower locking position, then the sleeve may be turned so that the lug 49 travels around in the leg of the -slot S. The sleeve may be turned until said lug) 57 this means the sleeve is wedged into-lock Furthermore, the leg 45 of `the slot S is cut in such a direction that the blades cannot accidentally come loose as boring proceeds. Another feature of the sleeve 47 is that the hinging elements between the blade are protected from dirt, debris and the like during the boring operation. The shallow portion of the slot S is positioned oppositely to the main mass of the hinging element 31 so that 4whenthe lug 49 rides in said portion then the sleeve 47 is drawn so as to push the element 31 up against the element 15, regardless of wear. Tight blades are thus always assured while boring proceeds. Y p

Figs. 1 and 2 illustrate how the cutting ends 51 of the blades are made, and how they are given a set in order that the upper portions of the auger will not jam into the hole being bored.

In order to bore a hole an operator needs merely close the

blades

25, 26, slip the locking sleeve down over the cylindrical portions C, turn said sleeve 47 counterclockwise, and proceed with jthe boring oper-1 ation. lVhen the blades are lilled `with earth or the like the auger is withdrawn, the sleeve 47 turned clockwise and retracted upwardly, whereupon the blades automatically move apart as gravity forces outl the earth or the blades may be pulled apart.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be madein carrying out the above constructions without departing` from the scope of the invention, it is intended thatall matter contained in the above description or shown in the accoinsleeve ada ated to slide over said hinein-frV portions to lock said blades in closed position and adapted to slide therefrom., slotted Y guide means shaped to guidesaidsl'eeve inv aV predetermined movement, and a lug on said sleeve adapted to slidably engage said slotted guide means. l Y

3. An auger comprising blade members,

Lian

means for relatively hinging said blade members, a sleeve adapted to slide over the hinging means, said sleeve being adapted to hold said blade members in a predetermined position, guide means, and a lug on the sleeve adapted to slidably engage said guide means, said guide means having a restricted portion for engaging the lug to force said sleeve to tightly hold the blade members.

el. An auger comprising blade members, means for relatively hinging said members, a sleeve adapted to slide over said hinging means and thereby to hold said blades in a predeterminedposition, guide means having one leg thereof formed circularly with respect to the hinging means, and a lug on said sleeve adapted'to engage the guide means such 'that when the lug is at the said circular portionthe said blade members are held in said predetermined position.

5. An auger comprising blade members, means for relatively hinging said members, a sleeve adapted to slide over said hinging means and'thereby to hold said blades in a Vpredetermined position, guide means having one leg thereof formed circularly with -respect to the hinging means, a lug on said sleeve adapted to engage the guide means such that when the lug is at the said circular portion the said blade members are held in said predetermined position, and a shallow portion in the circular portion of said guide means adapted to be engaged by the lug to wedge the sleeve.

6. An auger comprising blade members, means for relatively hinging said members, a sleeve adapted to slide over thehinging means and adapted to rotate with respect thereto, said sleeve being adaptedto hold said blade members in a predetermined position when surrounding the hinging means, a bayonet guide means formed in said hinging means having a longitudinal and a circular element, and a' lug on the sleeve adapted to engage said guide means whereby the sleeve is adapted to be slipped from the hinging means when the lug is' in the longitudinal element of the guide means and to be locked over the hinging means when the lug is turned into the circular element of the guide means.

7. An auger comprising blade members, means for relatively hingingl said members, a sleeve adapted to slide over the hinging means and adapted to rotate with respect thereto, said sleeve being adapted tohold said blade members in a predetermined position when surrounding the 'hinging means, a bayonet guide means formed in said hinging means having a longitudinal and a circular element, a lug on the sleeve adapted to engage said gu1de means whereby the sleeve is adapted to be slipped from the hinging means when the lug is in the longitudinal element of the guide means and to be locked over the hinging means when the lug is turned into the circular element of the guide means, and a shallow portion in the circular element of the guide means adapted to be engaged by said lug, whereby the sleeve is wedged against the hinging portion,

8. An auger comprising blade members, means for relatively hinging said members, a sleeve adapted to slide over the hinging means and adapted to rotate with respect thereto, said sleeve being adapted to hold said blade members in a predetermined position when surrounding the hinging means, a bayonet guide means formed in said hinging means, a lug on the sleeve adapted to engage the guide means, said slot being adapted to permit longitudinal movement of the sleeve on and off of the hinging means and to permit rotatable movement of the sleeve on said hinging means, whereby longitudinal movement of the sleeve is prevented.

v9. An auger comprising blade members, means for relatively hinging said members, a sleeve adapted to slide over the hinging means and adapted to rotate with respect thereto, said sleeve being adapted to hold said blade members in a predetermined position when surrounding the hinging means, a bayonet guide means formed in said hinging means, a lug on the sleeve adapted to engage the guide means, said guide means being adapted to permit l-ongitudinal movement of the sleeve on and off of the hinging means and to permit rotatable movement of the sleeve on said hinging means, whereby longitudinal movement of the sleeve is prevented, said guide means having a shallow reduced portion therein adapted to be engaged by' said lug whereby the sleeve vis wedged against the hinging means.

10. An auger comprising-relatively hinged blade members cylindrioally formed at the hinging portion therebetween, a locking sleeve adapted to slide over said hinge portions to lock said blades in closed position, and to slide therefrom, a tortuous guide means formed in one of the members and a lug on said sleeveadapted to slidably engage said guide means. f

In testimony whereof, I have signed my name to this speciiication this 6th day of August, 1926 A THEODORE BIRKENMAIER.

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