US3318401A - Auger head - Google Patents

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US3318401A
US3318401A US342447A US34244764A US3318401A US 3318401 A US3318401 A US 3318401A US 342447 A US342447 A US 342447A US 34244764 A US34244764 A US 34244764A US 3318401 A US3318401 A US 3318401A
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Prior art keywords
recess
head member
tooth
head
auger
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US342447A
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Ralph E Carbert
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TEL E LECT PRODUCTS Inc
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TEL E LECT PRODUCTS Inc
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • E21B10/627—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements
    • E21B10/633—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements independently detachable
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2833—Retaining means, e.g. pins
    • E02F9/2841—Retaining means, e.g. pins resilient
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/19—Means for fixing picks or holders
    • E21C35/197—Means for fixing picks or holders using sleeves, rings or the like, as main fixing elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/60—Biased catch or latch

Definitions

  • a more specific object is to provide a novel and improved earth boring apparatus of simple and inexpensive construction so designed as to permit its teeth to be replaced with a minimum of time loss, effort, and expense.
  • Another object is to provide novel and improved earth boring apparatus which is so designed as to permit the teeth to be simply and easily removed and replaced with new teeth without removing the head of the auger.
  • Another object is to provide novel and improved earth boring apparatus utilizing an auger head which is so designed as to obviate the likelihood of the teeth becoming detached during usage in earth boring operations.
  • Another object is to provide novel and improved earth boring apparatus having an auger head which provides a mounting for teeth upon various machines which will greatly facilitate the removal and/ or replacement so that such removal and/or replacement may be accomplished in a matter of seconds.
  • Another object is to provide novel and improved earth boring equipment having an anger head which is so constructed and designed as to hold the teeth firmly in place despite prolonged usage in operation.
  • FIG. 1 is a side elevational view of the lower end portion of an anger illustrating my improved auger head and removable teeth mounted thereon.
  • FIG. 2 is an exploded view illustrating a portion of the head with its tooth receiving recess shown in section and with the tooth and retaining ring shown at opposite sides of the head in the manner in which they are applied to the head.
  • FIG. 3 is a sectional view taken along approximately line 33 of FIG. 1.
  • FIGS. l-3 there is shown the lower end portion of an auger 5 with the usual flights 6 thereon.
  • a rigid auger head 7 within which there is formed a plurality of tooth receiving recesses 8. These recesses 8 are angled and extend forwardly in the direction of rotation of the auger 5 and hence only the cutting portions of the teeth are shown at the right hand side of FIG. 1 and the upper ends of the recesses and teeth are shown at the left "ice hand side of that figure.
  • the central and lower portion of the auger head 7 is provided with an hexagonal recess (not shown) which receives therein the point 9, the upper end portion of which is shaped hexagonally to conform with the recess and likewise is not shown.
  • the point 9 is fixedly secured in this recess by the bolt 10.
  • Each of the recesses 8 is elongated and is adapted to receive and rigidly mount therein one of the teeth 11.
  • the head 7 has wall structure 12 which defines the individual recesses and includes structure 13 which defines a groove 14 adjacent the inner end of and around the longitudinal axis of the recess 8.
  • the groove 14 is annular and is substantially semi-circular in cross-sectional configuration as best shown in FIG. 3.
  • the outer and lowermore portion 15 of the Wall structure 12 which defines the recess 8 is rectangular in crosssectional configuration, as best shown in FIG. 2 and terminates with a shoulder 16.
  • the inner or uppermore portion 17 has cylindrically shaped walls 18 which define an opening 19 at the upper end of the recess.
  • the intermediate portion 20 of the wall structure 12 which includes the groove defining portion 13 is circular in crosssectional configuration.
  • Each of the teeth 11 is elongated as best shown in FIG. 2 and includes a cutting portion 21 and a somewhat ottset elongated shank 22.
  • the outer or lowermore portion 23 of the shank 22 is of the same size and configuration as the outer or lowermore portion 15 of the wall structure 12 so as to be received therein in complementary relation.
  • the rectangularly shaped lowermore portion 23 of the shank is of smaller dimensions than the cutting portion 21 so as to provide a shoulder 24 which will abut against the head, as best shown in FIG. 3.
  • a shoulder 25 which is provided as a result of the smaller dimensions of the intermediate portion 26.
  • the intermediate portion 26 is circular in cross-sectional configuration and is of the same size and configuration as the intermediate portion 241? of the recess 8 except that it has an annular groove 27 formed in its circumferential surface which is disposed directly opposite the groove 14.
  • the groove 14 combines with the groove 27 to form a circular groove adapted to receive a retaining ring therein.
  • the groove 27 is of semicircular configuration and is of lesser depth than the groove 14.
  • the outer or upper end portion of the shank 22 has an annular inwardly tapered wall 28 which extends to the opening 19.
  • the outer or upper end 29 of the tooth 11 is fiat and is accessible, when the tooth is mounted upon the head, via the opening 19 as shown in FIG. 1.
  • An annular retaining ring 30 is provided for holding the tooth 1.1 within the recess 8.
  • This retaining ring 30 is formed of a firm, compressible, resilient, elastomeric material such as is conventionally utilized n the manufacture of sealing rings.
  • the ring 39 is of the type of sealing ring commonly referred to as an O-ring because of its circular cross-sectional configuration.
  • This ring 30 is of a diameter equal to the diameter of the combined groove defined by the grooves 14 and 27 and, since it is resilient, it resiliently holds the tooth 11 Within the recess 8.
  • the tooth 11 is mounted within the recess 8 by merely slipping the elongated shank portion 22 upwardly into the recess 8 at the lowermore portion thereof so that the rectangular portion 23 will be inserted into the rectangular wall structure 15 and the shoulder 25 will terminate near the shoulder 16 while the shoulder 24 bears against the outer surface of thehead "7.
  • the O-ring 30 Prior to inserting the tooth, however, the O-ring 30 is slipped into the groove 14 from the upper end through the opening 19 and is positioned within the groove 50 that as the tapered walls 28 engage the same, they ex and the ring 30 and this expanding action together with the holding function performed by the groove 14 causes the ring to remain in place while the circular area adjacent the walls 29 will slip through the ring until the ring slips into the groove 27.
  • Earth-boring apparatus for use in conjunction with an auger comprising:
  • said head member having an elongated recess formed therein and extending inwardly from the outer surface thereof to receive andrigidly support a tooth member therein,
  • said head member including wall structure defining said recess and having a groove formed in said wall structure intermediate the ends of said recess extending transversely of the longitudinal axis of said recess,
  • said shank portion being of substantially the same size and configuration as the portion of said recess into which said shank portion is received and being received therein in close-fitting relation
  • said shank portion having a cooperating groove formed in its exterior surface and extending transversely of the longitudinal axis of said shank portion and directly opposite said groove in said head member wall structure,
  • one of said grooves being of a depth less than the radial cross-sectional dimensions of said retaining member but of sufficient depth to receive and retain said compressible retaining member therewithin without damage thereto as said shank portion is inserted Within said recess to being said grooves into juxtaposition and to thereafter confine said retaining member in cooperation with the other of said groove in uncompressed but inter-locking relation to said tooth and said head member,
  • one of said grooves is in said shank and is of less depth than the said groove in said wall structure defining said recess.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Description

y 1967 R. E. CARBERT 3,318,401
AUGER HEAD Filed Feb. 4, 1964 Z4 c 1 Z9 10 i II I C [M g4 I I "w I" 'l I II I I. I a "I 1 In" 11 Ir 1] 11 3 j] INVENTOR.
R41 PA f. UAPBEPT FIE 3 j 4TT0PA EVS United States Patent C) 3,318,401 AUGER HEAD Ralph E. Carbert, Minneapolis, Minn., assignor to Tel-E- Lect Products, Inc., a corporation of Minnesota Filed Feb. 4, 1964, Ser. No. 342,447 2 Claims. (Cl. 175-413) This invention relates to earth boring equipment. More particularly, it relates to an auger head for an auger and means for releasably mounting teeth thereupon.
There is a definite need in the field of earth boring equipment for improved means for mounting teeth upon the head of an auger. The brunt of the wear is normally borne by the teeth of an anger and consequently, the worn out teeth must be relatively frequently replaced. Since the cost of down time of an earth boring machine has become ever increasing because of the increased investment and labor costs and size of equipment, it is important that such time and the labor involved be reduced to an absolute minimum. My invention is directed toward this end.
It is a general object of my invention to provide a novel and improved earth boring apparatus of simple and inexpensive construction and yet capable of having its teeth simply and inexpensively replaced.
A more specific object is to provide a novel and improved earth boring apparatus of simple and inexpensive construction so designed as to permit its teeth to be replaced with a minimum of time loss, effort, and expense.
Another object is to provide novel and improved earth boring apparatus which is so designed as to permit the teeth to be simply and easily removed and replaced with new teeth without removing the head of the auger.
Another object is to provide novel and improved earth boring apparatus utilizing an auger head which is so designed as to obviate the likelihood of the teeth becoming detached during usage in earth boring operations.
Another object is to provide novel and improved earth boring apparatus having an auger head which provides a mounting for teeth upon various machines which will greatly facilitate the removal and/ or replacement so that such removal and/or replacement may be accomplished in a matter of seconds.
Another object is to provide novel and improved earth boring equipment having an anger head which is so constructed and designed as to hold the teeth firmly in place despite prolonged usage in operation.
These and other objects and advantages of this invention will more fully appear from the following description, made in connection With the accompanying drawings, wherein like reference characters refer to the same or similar parts throughout the several views, and in which:
FIG. 1 is a side elevational view of the lower end portion of an anger illustrating my improved auger head and removable teeth mounted thereon.
FIG. 2 is an exploded view illustrating a portion of the head with its tooth receiving recess shown in section and with the tooth and retaining ring shown at opposite sides of the head in the manner in which they are applied to the head.
FIG. 3 is a sectional view taken along approximately line 33 of FIG. 1.
In the embodiment shown in FIGS. l-3, there is shown the lower end portion of an auger 5 with the usual flights 6 thereon. Welded to the lower end of the auger 5 is a rigid auger head 7 within which there is formed a plurality of tooth receiving recesses 8. These recesses 8 are angled and extend forwardly in the direction of rotation of the auger 5 and hence only the cutting portions of the teeth are shown at the right hand side of FIG. 1 and the upper ends of the recesses and teeth are shown at the left "ice hand side of that figure. The central and lower portion of the auger head 7 is provided with an hexagonal recess (not shown) which receives therein the point 9, the upper end portion of which is shaped hexagonally to conform with the recess and likewise is not shown. The point 9 is fixedly secured in this recess by the bolt 10.
Each of the recesses 8 is elongated and is adapted to receive and rigidly mount therein one of the teeth 11. The head 7 has wall structure 12 which defines the individual recesses and includes structure 13 which defines a groove 14 adjacent the inner end of and around the longitudinal axis of the recess 8. The groove 14 is annular and is substantially semi-circular in cross-sectional configuration as best shown in FIG. 3.
The outer and lowermore portion 15 of the Wall structure 12 which defines the recess 8 is rectangular in crosssectional configuration, as best shown in FIG. 2 and terminates with a shoulder 16. The inner or uppermore portion 17 has cylindrically shaped walls 18 which define an opening 19 at the upper end of the recess. The intermediate portion 20 of the wall structure 12 which includes the groove defining portion 13 is circular in crosssectional configuration.
Each of the teeth 11 is elongated as best shown in FIG. 2 and includes a cutting portion 21 and a somewhat ottset elongated shank 22. The outer or lowermore portion 23 of the shank 22 is of the same size and configuration as the outer or lowermore portion 15 of the wall structure 12 so as to be received therein in complementary relation. As best shown in FIGS. 2 and 3, the rectangularly shaped lowermore portion 23 of the shank is of smaller dimensions than the cutting portion 21 so as to provide a shoulder 24 which will abut against the head, as best shown in FIG. 3. At the opposite end of the rectangular portion 23 there is a shoulder 25 which is provided as a result of the smaller dimensions of the intermediate portion 26. This shoulder 25 terminates next to the shoulder 16 of the recess when the tooth 11 is in mounted position upon the head 7 within the recess 8. The intermediate portion 26 is circular in cross-sectional configuration and is of the same size and configuration as the intermediate portion 241? of the recess 8 except that it has an annular groove 27 formed in its circumferential surface which is disposed directly opposite the groove 14. When the tooth 11 is mounted upon the head 7 as shown in FIG. 3, the groove 14 combines with the groove 27 to form a circular groove adapted to receive a retaining ring therein. The groove 27 is of semicircular configuration and is of lesser depth than the groove 14.
The outer or upper end portion of the shank 22 has an annular inwardly tapered wall 28 which extends to the opening 19. The outer or upper end 29 of the tooth 11 is fiat and is accessible, when the tooth is mounted upon the head, via the opening 19 as shown in FIG. 1.
An annular retaining ring 30 is provided for holding the tooth 1.1 within the recess 8. This retaining ring 30 is formed of a firm, compressible, resilient, elastomeric material such as is conventionally utilized n the manufacture of sealing rings. In fact, the ring 39 is of the type of sealing ring commonly referred to as an O-ring because of its circular cross-sectional configuration. This ring 30 is of a diameter equal to the diameter of the combined groove defined by the grooves 14 and 27 and, since it is resilient, it resiliently holds the tooth 11 Within the recess 8.
In use, the tooth 11 is mounted within the recess 8 by merely slipping the elongated shank portion 22 upwardly into the recess 8 at the lowermore portion thereof so that the rectangular portion 23 will be inserted into the rectangular wall structure 15 and the shoulder 25 will terminate near the shoulder 16 while the shoulder 24 bears against the outer surface of thehead "7. Prior to inserting the tooth, however, the O-ring 30 is slipped into the groove 14 from the upper end through the opening 19 and is positioned within the groove 50 that as the tapered walls 28 engage the same, they ex and the ring 30 and this expanding action together with the holding function performed by the groove 14 causes the ring to remain in place while the circular area adjacent the walls 29 will slip through the ring until the ring slips into the groove 27. This latter positioning of the ring 30 Within the groove 27 takes place simultaneously with the arrest of the shoulder 25 by the shoulder 16 and the shoulder 24 by the outer surface of the head member 7. Thereafter the ring 30 holds the tooth member 11 in operating position with the shank portion 2 2 .in close fitting relation with the recess defining walls of the head member. The cooperation of the rectangularly shaped portion 23 of the tooth and the rectangularly shaped Wall structure preclude rotation of the tooth member 11 about its longitudinal axis and consequently, the tooth member will be held firmly and positively in cutting position throughout the earth boring operation.
When a particular tooth 11 becomes worn and needs to be replaced, it is an extremely simple operation to remove the tooth and insert a new one. To do so the operator merely holds a punch against the upper end 29 of the tooth 11 which is accessible via the opening 19 and strikes the punch wit-h a hammer which will cause the worn tooth to be ejected from the lower end portion of the recess. A new tooth may then be slipped into place in the manner hereinbefore described. Such a replacement may be accomplished within a matter of seconds and consequently, cuts down very substantially on the down time. It will be noted that all of the teeth 11 are of the same construction and are interchangeable. From the above it can be seen that I have provided a novel and improved auger head which includes a novel mounting for auger teeth which greatly reduces the time loss, eifort, and expense involved in replacing worn out teeth. Moreover, the replacement can be accomplished without reference to the'specific tooth and it precludes the likelihood of the teeth becoming detached during usage in earth boring operations as frequently takes place when such teeth are mechanically connected by bolts, pins, or the like. In addition,,because of the resilient nature of the ring 30, the tooth will always be held in snug-fitting relation and thereby prevent'lateral movement or shifting of the teeth relative to the head.
It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts without departing from the scope of this invention which consists of the matter shown and described herein and set forth in the appended claims.
What is claimed is:
1. Earth-boring apparatus for use in conjunction with an auger comprising:
(a) a rigid head member adapted to be mounted in supportedrrelation upon such an auger,
(b) said head member having an elongated recess formed therein and extending inwardly from the outer surface thereof to receive andrigidly support a tooth member therein,
(c) said head member including wall structure defining said recess and having a groove formed in said wall structure intermediate the ends of said recess extending transversely of the longitudinal axis of said recess,
(d) a tooth removably mounted on said head member and having an engaging portion at one of its ends and having an elongated shank portion received within said head member recess and supporting said engaging portion exteriorly upon said head member,
(e) said shank portion being of substantially the same size and configuration as the portion of said recess into which said shank portion is received and being received therein in close-fitting relation,
(f) said shank portion having a cooperating groove formed in its exterior surface and extending transversely of the longitudinal axis of said shank portion and directly opposite said groove in said head member wall structure,
(g) a continuous annular retaining member made of firm compressible material disposed between said shank portion and said wall structure and within said grooves and retaining in cooperation with said grooves said shank member within said head member recess to thereby cooperatively support said tooth upon said head member, and
(h) one of said grooves being of a depth less than the radial cross-sectional dimensions of said retaining member but of sufficient depth to receive and retain said compressible retaining member therewithin without damage thereto as said shank portion is inserted Within said recess to being said grooves into juxtaposition and to thereafter confine said retaining member in cooperation with the other of said groove in uncompressed but inter-locking relation to said tooth and said head member,
(i) means carried by said head member and engaging said tooth and preventing said tooth from rotation about a longitudinal axis thereof.
2. The earth-boring apparatus as defined in and by claim 1, wherein one of said grooves is in said shank and is of less depth than the said groove in said wall structure defining said recess.
References Cited by the Examiner UNITED STATES PATENTS 1,228,296 5/1917 Chapman 175392 1,318,958 10/1919 Bernay- 1754l3 X 1,442,223 1/1923 Knebusch 287l 19 2,456,355 12/1948 Aber 7 2,678,853 5/1954 Reeder 37142 X 2,701,126 2/1955 McClennan -391 2,780,439 2/1957 Kandle 175413 X 2,877,985 3/1959 Peterson 175410 X 2,965,365 12/1960 Krekeler 37-142 X CHARLES E. OC ONNELL, Primary Examiner. JACOB L. NACKENOFF, Examiner.
N. C. BYERS, Assistant Examiner.
Patent No. 3,318,401
May 9, 1967 Ralph E. Carbert ears in the above numbered patd that error app (1 Letters Patent should read as It is hereby certifie t the sai ent requiring correction and the corrected below.
Column 4, line 33, for "being" read bring Signed and sealed this 21st day of November 1967.
(SEAL) Attest:
Edward M. Fletcher, Jr. EDWARD J. BRENNER Commissioner of Patents Attesting Officer

Claims (1)

1. EARTH-BORING APPARATUS FOR USE IN CONJUNCTION WITH AN AUGER COMPRISING: (A) A RIGID HEAD MEMBER ADAPTED TO BE MOUNTED IN SUPPORTED RELATION UPON SUCH AN AUGER, (B) SAID HEAD MEMBER HAVING AN ELONGATED RECESS FORMED THEREIN AND EXTENDING INWARDLY FROM THE OUTER SURFACE THEREOF TO RECEIVE AND RIGIDLY SUPPORT A TOOTH MEMBER THEREIN, (C) SAID HEAD MEMBER INCLUDING WALL STRUCTURE DEFINING SAID RECESS AND HAVING A GROOVE FORMED IN SAID WALL STRUCTURE INTERMEDIATE THE ENDS OF SAID RECESS EXTENDING TRANSVERSELY OF THE LONGITUDINAL AXIS OF SAID RECESS, (D) A TOOTH REMOVABLY MOUNTED ON SAID HEAD MEMBER AND HAVING AN ENGAGING PORTION AT ONE OF ITS ENDS AND HAVING AN ELONGATED SHANK PORTION RECEIVED WITHIN SAID HEAD MEMBER RECESS AND SUPPORTING SAID ENGAGING PORTION EXTERIORLY UPON SAID HEAD MEMBER, (E) SAID SHANK PORTION BEING OF SUBSTANTIALLY THE SAME SIZE AND CONFIGURATION AS THE PORTION OF SAID RECESS INTO WHICH SAID SHANK PORTION IS RECEIVED AND BEING RECEIVED THEREIN IN CLOSE-FITTING RELATION, (F) SAID SHANK PORTION HAVING A COOPERATING GROOVE FORMED IN ITS EXTERIOR SURFACE AND EXTENDING TRANSVERSELY OF THE LONGITUDINAL AXIS OF SAID SHANK PORTION AND DIRECTLY OPPOSITE SAID GROOVE IN SAID HEAD MEMBER WALL STRUCTURE,
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422915A (en) * 1967-06-30 1969-01-21 James P Watts Drilling auger and cutting tooth therefor
US3453658A (en) * 1967-06-30 1969-07-01 James P Watts Cutting tooth for earth drilling and digging machines
US3471954A (en) * 1966-07-18 1969-10-14 Machinery Inc Const Resilient ball retainer for tooth and holder
US3520565A (en) * 1966-10-28 1970-07-14 Padley & Venables Ltd Connecting of tapered spigots and sockets
US3618683A (en) * 1968-12-16 1971-11-09 Ingersoll Rand Co Button bit
US4165622A (en) * 1976-04-30 1979-08-28 Bourns, Inc. Releasable locking and sealing assembly
US4316636A (en) * 1979-02-01 1982-02-23 Kennametal Inc. Excavation and road maintenance bits and blocks
WO1984004483A1 (en) * 1983-05-06 1984-11-22 Cbs Inc Snap-in vibrato arm
US4543233A (en) * 1982-04-08 1985-09-24 The United States Of America As Represented By The United States Department Of Energy Mechanically attached load pad for liquid metal nuclear reactor fuel assemblies
US4915454A (en) * 1986-11-04 1990-04-10 Southern Philip W Mining bit and holder
US5080521A (en) * 1988-03-30 1992-01-14 Aeroquip Corporation "O" ring locking mechanism
US20030025282A1 (en) * 2001-05-31 2003-02-06 Rivin Evgeny I. Mechanical contact connection
WO2004109059A1 (en) * 2003-06-03 2004-12-16 Gerd Elfgen Retaining element for a round shank bit on a milling machine
US20090261646A1 (en) * 2008-04-22 2009-10-22 Kennametal Inc. Indexable Cutting Tool System
US20120104833A1 (en) * 2009-01-22 2012-05-03 Keystone Engineering & Manufacturing Corporation Wear insert and retainer
US8528990B2 (en) 2009-01-22 2013-09-10 Keystone Engineering & Manufacturing Corporation Cutter with diamond bit tip
USD778967S1 (en) * 2015-06-26 2017-02-14 Pengo Corporation Step shank tooth holder

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1228296A (en) * 1916-10-21 1917-05-29 Charles T Chapman Drill-bit.
US1318958A (en) * 1919-10-14 Henri bernay
US1442223A (en) * 1919-12-22 1923-01-16 Cleveland Steel Tool Company Rivet set
US2456355A (en) * 1947-01-13 1948-12-14 Joseph S Aber Elastic snap ring fastener
US2678853A (en) * 1952-03-20 1954-05-18 Reeder Ray Securing means for hammers
US2701126A (en) * 1950-08-15 1955-02-01 Austin Powder Co Auger head
US2780439A (en) * 1954-09-20 1957-02-05 Kandle Charles William Earth boring drills
US2877985A (en) * 1956-03-29 1959-03-17 Gerald A M Petersen Hard tip pilot bit
US2965365A (en) * 1958-04-14 1960-12-20 Cincinnati Mine Machinery Co Bit and resilient holding means therefor

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1318958A (en) * 1919-10-14 Henri bernay
US1228296A (en) * 1916-10-21 1917-05-29 Charles T Chapman Drill-bit.
US1442223A (en) * 1919-12-22 1923-01-16 Cleveland Steel Tool Company Rivet set
US2456355A (en) * 1947-01-13 1948-12-14 Joseph S Aber Elastic snap ring fastener
US2701126A (en) * 1950-08-15 1955-02-01 Austin Powder Co Auger head
US2678853A (en) * 1952-03-20 1954-05-18 Reeder Ray Securing means for hammers
US2780439A (en) * 1954-09-20 1957-02-05 Kandle Charles William Earth boring drills
US2877985A (en) * 1956-03-29 1959-03-17 Gerald A M Petersen Hard tip pilot bit
US2965365A (en) * 1958-04-14 1960-12-20 Cincinnati Mine Machinery Co Bit and resilient holding means therefor

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3471954A (en) * 1966-07-18 1969-10-14 Machinery Inc Const Resilient ball retainer for tooth and holder
US3520565A (en) * 1966-10-28 1970-07-14 Padley & Venables Ltd Connecting of tapered spigots and sockets
US3422915A (en) * 1967-06-30 1969-01-21 James P Watts Drilling auger and cutting tooth therefor
US3453658A (en) * 1967-06-30 1969-07-01 James P Watts Cutting tooth for earth drilling and digging machines
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