US3917009A - Removable stem for raise bits - Google Patents

Removable stem for raise bits Download PDF

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Publication number
US3917009A
US3917009A US506667A US50666774A US3917009A US 3917009 A US3917009 A US 3917009A US 506667 A US506667 A US 506667A US 50666774 A US50666774 A US 50666774A US 3917009 A US3917009 A US 3917009A
Authority
US
United States
Prior art keywords
drive stem
bit
collar
pilot hole
raise
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US506667A
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English (en)
Inventor
Norman Dean Dyer
Howard Earl Mitchell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tamrock Canada Inc
Original Assignee
Dresser Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dresser Industries Inc filed Critical Dresser Industries Inc
Priority to US506667A priority Critical patent/US3917009A/en
Priority to CA232,223A priority patent/CA1023340A/en
Priority to NO752679A priority patent/NO143172C/no
Priority to ZA00755015A priority patent/ZA755015B/xx
Priority to AU84018/75A priority patent/AU492359B2/en
Priority to ZM121/75A priority patent/ZM12175A1/xx
Priority to FI752393A priority patent/FI64836C/fi
Priority to SE7510119A priority patent/SE414657B/xx
Priority to FR7528014A priority patent/FR2284751A1/fr
Application granted granted Critical
Publication of US3917009A publication Critical patent/US3917009A/en
Assigned to TAMROCK CANADA INC., A CORP. OF ONTARIO, CANADA reassignment TAMROCK CANADA INC., A CORP. OF ONTARIO, CANADA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DRESSER INDUSTRIES, INC., A DE. CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
    • F16D1/093—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping
    • F16D1/094—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces using one or more elastic segmented conical rings forming at least one of the conical surfaces, the rings being expanded or contracted to effect clamping using one or more pairs of elastic or segmented rings with mutually mating conical surfaces, one of the mating rings being contracted and the other being expanded
    • 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring
    • 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
    • Y10T403/70—Interfitted members
    • Y10T403/7047—Radially interposed shim or bushing
    • Y10T403/7051—Wedging or camming
    • Y10T403/7052—Engaged by axial movement
    • Y10T403/7058—Split or slotted bushing

Definitions

  • a raise bit for enlarging a pilot hole into a larger diameter hole by disintegrating the earth formations surrounding the pilot hole includes a removable drive stem.
  • the removable drive stem allows the raise bit to be transported through small drifts and helps extend the useful lifetime of the raise bit.
  • the raise bit may be assembled without weakening the highly-stressed, heat-treated drive stem by welding.
  • the raise bit body includes a multiplicity of rolling cutters for contacting and disintegrating the earth formations surrounding the pilot hole.
  • the raise bit body includes a fixed collar with a truncated conical inside surface.
  • a two piece, split, removable collar with an inside surface that matches the outside surface of the drive stem and a conical outer surface that matches the inside surface of the fixed collar is positioned around the drive stem.
  • a flange at the end of the drive stem allows the split collar to be drawn up into the fixed collar thereby developing frictional forces between the mating surfaces of the fixed collar, the split collar, and the drive stem.
  • a preload is induced into the system to insure proper torque transmittal at low bit loads.
  • the present invention relates to the art of earth boring and more particularly to a raise bit for enlarging a pilot hole into a larger diameter hole by disintegrating the earth formations surrounding the pilot hole.
  • a relatively large diameter hole may be provided between a first location and a second location in a mine by an operation commonly referred to as raise drilling.
  • a raise drilling operation begins by drilling a small diameter pilot hole through the earth from the first location to an opening at the second location using a small diameter pilot bit. After the pilot hole is completed, the pilot bit is removed from the drill column and a large diameter raise bit attached. The raise bit is rotated and drawn along the pilot hole thereby enlarging the pilot hole to the desired size.
  • the small diameter pilot hole extends to an area accessible only through a small drift or passage.
  • the removable drive stem of the present invention provides a raise bit with a low profile thereby allowing the raise bit to be transported through small drifts or passages.
  • a 72-inch diameter raise bit incorporating the present invention may be transported through a drift having a 30-inch height whereas a 72-inch diameter raise bit without the removable stem requires a drift with at least a 52-inch height.
  • the tremendous stress and wear encountered during the raise drilling operation causes some elements of the raise bit to-wear out much faster than others, notably, the cutters and the drive stem.
  • the bit of the present invention allows the elements that have a relatively short lifetime to be replaced thereby extending the lifetime of the bit and reducing cost.
  • the drive stem is removable, and therefore, replaceable as are the individual cutters. This allows the elements that receive the greatest stress and wear to be readily replaced.
  • the relatively short lifetime of the individual cutters results from their nearly constant contact with the formations and their constant exposure to wear and abuse.
  • the drive stem also contacts the formations and receives a great deal of wear and abuse.
  • the drive stem absorbs a large amount of stress since it is the single link between the drill column and the body of the bit. All energy from the rotary equipment is transmitted to the raise bit through the drive stem.
  • the drive stem is very often subject to failure prior to failure of the body of the raise bit. It is, therefore, desirable to be able to easily and quickly remove the stem from the raise bit and replace it with a new drive stem.
  • the stem is generally constructed ofa' high-strength, heat-treated material and would be weakened by welding. It is, therefore, desirable to be able to attach and remove the stem from the raise bit body without welding. From the foregoing, it will be appreciated that the stem must be constructed of material that will stand up under the harsh conditions encountered. Such material is expensive and any reduction in the amount of this material required is a cost savings.
  • the bit of the present invention allows the stem to be manufactured from high-strength material, whereas the body may include lower strength and, therefore, less expensive materials.
  • the stem or a stabilizer section on the stem should be nearly the size of the pilot hole during the'raise drilling operation to insure a smooth drilling operation.
  • the stem should be easy to remove and replace using simple hand tools. This allows the stem to be replaced in the field under adverse conditions.
  • Raise bits manufactured by The Robbins Company, 650 South Orcas Street, Seattle, Washington 98108, include a stem that may be replaced by disconnecting taper collets on the top of the body that mate with the tapered section on the stem and disconnecting a bolt with a split tapered bushing that extends through the lower end of the stem.
  • the present invention provides a raise bit for enlarging a pilot hole into a large diameter hole by disintegrating the earth formations surrounding the pilot hole.
  • the body of the raise bit includes a multiplicity of rolling cutters for contacting and disintegrating the earth formations surrounding the pilot hole.
  • a collar with a truncated conical inside surface is affixed to the raise bit body.
  • One end of the drive stern extends into the collar.
  • a two-piece, split collar with an inside surface that matches the outer surface of the stem and a conical outer surface that matches the inside surface of the collar is positioned around the lower end of the drive stem.
  • the drive stem and split collar are then drawn up into the collar. Frictional forces are developed between the mating surfaces of the collar, the split collar, and the drive stem thereby preventing rotational, radial, and axial movement of the drive stem with respect to the raise bit body.
  • the drive stem of the present invention may be removed and a new drive stern inserted in its place.
  • raise bit of the present invention may be transported through small drifts or passages by removingthe drive stem from the raise bit body.
  • the drive stern may then be reattached and the raise bit is ready for operation.
  • the high-strength, heat-treated stem is not weakened by welding.
  • the raise bit body may be constructed of materials that are less expensive than the materials that make up the drive stem. Different sized drive stems may be attached to the raise bit body to allow the raise bit to be used in pilot holes of different sizes.
  • the removal of the stern and replacement with a new stem may be accomplished in the field under adverse conditions with simple hand tools. Zero clearance is provided between the stem, the split collar, and the collar. This insures a rigid connection between the drive stem and the raise bit body.
  • the drive stem of the present invention may be easily removed and a new stem put in place without removing the cutter saddles adjacent the stem.
  • FIG. 1 is a side view of a bit constructed in accordance with the present invention.
  • FIG. 2 is an exploded view ofa portion of the raise bit shown in FIG. 1.
  • FIG. 3 shows the location of the elements shown in FIG. 2 when the elements are assembled.
  • FIG. 1 a side view of a raise bit constructed in accordance with the present invention and generally designated by the reference number is shown.
  • the raise bit 10 includes a raise bit body 11 or cutter stage body and a drive stem 12. The upper portion of the drive stem 12 is enlarged to form a stabilizer section 13.
  • the raise bit 10 is adapted to be connected to a rotary drill column by a threaded connection 14.
  • a multiplicity of rolling cutters 15 are mounted in a corresponding multiplicity of saddles 16.
  • the saddles 16 extend from the raise bit body 11.
  • The-raise bit 10 is used in a raise drilling operation to provide a relatively large diameter hole from a first mine level to a second mine level.
  • the raise drilling operation begins by drilling a small diameter pilot hole through the earth from a first location to an opening at a second location using a small diameter pilot bit. After the pilot hole is completed, the pilot bit is removed from the drill column and the raise bit 10 is attached to the drill column. The raise bit 10 is rotated and drawn along the pilot hole thereby enlarging the pilot hole to the desired size.
  • FIG. 2 an exploded view of a portion of the stem 12 and raise bit body 11 is shown.
  • a cylindrical collar 17 is affixed to the raise bit body 11.
  • the collar 17 has a truncated conical inside surface 24.
  • the apex of the conical surface 24 intersects the center of rotation of the raise bit.
  • the lower end of the drive stem 12 extends through the collar 17.
  • a two-piece, split, removable collar consisting of sections 18 and 19 is positioned around the drive stem 12.
  • the section 18 includes a surface 25 that forms a portion of a conical outer surface that matches the conical inner surface 24 of collar 17.
  • the section 19 includes a surface 26 that forms a portion of the aforementioned conical outer surface that matches the conical inner surface 24 of 4 collar 17.
  • the section 18 includes a surface 27 that forms a portion of a cylindrical inner surface that matches the cylindrical outer surface 29 of drive stem 12.
  • the section 19 includes a surface 28 that forms a portion of the aforementioned cylindrical outer surface 29 of drive stem 12.
  • a flange 20 extends from the lower end of the drive stem 12.
  • a cap 21 is positioned below the flange 20 and a pair of bolts 22 and 23 are positioned to extend through holes 30 and 31 respectively in the cap 21 and engage threaded recesses 32 and 33 respectively in the collar 17.
  • FIG. 3 the elements of FIG. 2 are shown in their assembled position.
  • the sections 18 and 19 of the split collar are positioned around the lower end of the drive stem 12.
  • the stem 12 and the sections 18 and 19 are then drawn up into the collar 17.
  • the stem 12 is initially prevented from pulling through the collar 17 by the flange 20 extending from the lower end of stem 12.
  • the flange 20 also exerts force on the sections 18 and 19 of the split collar forcing it even tighter against the collar 17.
  • the matching conical surfaces on the collar 17 and the sections 18 and 19 of the split collar force the sections 18 and 19 against the outer surface of the stem 12. A load applied to the raise bit increases the aforementioned forces.
  • a preload is induced into the system to insure proper torque transmittal at low bit loads by the cap 21 and bolts 22 and 23. When bolts 22 and 23 are tightened, they urge the cap 21 against the flange 20 and the sections 18 and 19 upward in the collar 17.
  • the raise drilling operation begins by drilling a small diameter pilot hole through the earth from a first location to an opening at a second location using a small diameter pilot bit. After the pilot hole is completed, the pilot bit is removed from the drill column and the raise bit 10 is attached to the drill column. The raise bit is rotated and drawn along the pilot hole, thereby enlarging the pilot hole to the desired size.
  • the collar 17 and sections 18 and 19 of the split collar provide a rigid connection between the drive stem 12 and the raise bit body 11.
  • the raise bit may be transportedthrough small drifts or passages by removing the drive stem 12 and transporting the drive stem 12 and the raise bit body 11 through the small drifts or passages separately.
  • the bolts 22 and 23 are removed, thereby disconnecting the cap 21 from the collar 17.
  • the drive stem 12 and the sections 18 and 19 of the split collar are moved downward thereby disengaging the sections 18 and 19 of the split collar from the collar 17.
  • the drive stem 12 may be removed from the raise bit body 11.
  • the separate elements of the raise bit 10 may then be transported separately through the small drift or passage.
  • the sections 18 and 19 of the split collar are positioned around the lower end of the drive stem 12 and the drive stem 12 and the split collar are moved upward into the collar 17.
  • the cap 21 is positioned in contact with the flange 20 and bolts 22 and 23 are engaged with the threaded recesses 32 and 33 respectively. Tightening of the bolts 22 and 23 imposes a preload on the system. The raise bit is again ready for operation.
  • the drive stem 12 may be removed from the raise bit body 11 and a new drive stem inserted in its place.
  • the bolts 22 and 23 are removed thereby disconnecting the cap 21 from the collar 17.
  • the drive stem 12 and sections 18 and 19 of the split collar are moved downward thereby disconnecting the drive stem 12 from the raise bit body 11.
  • the drive stem 12 is removed and the new drive stem inserted through the collar 17.
  • the sections 18 and 19 of the split collar are positioned around the new drive stem and the new drive stern and the sections 18 and 19 of the split collar are moved upward into the collar 17.
  • the cap 21 is positioned in contact with the flange on the end of the new drive stern and bolts 22 and 23 are engaged in the threaded recesses 32 and 33. Tightening of the bolts 22 and 23 imposes a preload on the system and the raise bit is ready for operation.
  • a bit for enlarging a pilot hole into a larger diameter hole by disintegrating earth formations surrounding the pilot hole comprising:
  • a drive stern having an upper end for projecting into said pilot hole
  • main bit body including a multiplicity of cutters for contacting and disintegrating earth formations surrounding the pilot hole;
  • a raise bit for enlarging a pilot hole into a larger diameter hole by disintegrating earth formations surrounding the pilot hole comprising:
  • cutter stage body said cutter stage body having an upper portion and a lower portion
  • retaining element means around said drive stem for retaining said drive stem in said central opening, said retaining element means having an outer surface adapted to mate with said conical inner surface;
  • a bit for enlarging a pilot hole into a larger diameter hole by disintegrating earth formations surrounding the pilot hole comprising:
  • a drive stem having an upper end for projecting into said pilot hole
  • main bit body including a multiplicity of cutters for contacting and disintegrating earth formations surrounding the pilot hole;
  • a collar positioned around said drive stem connected to said main bit body, said collar having a conical inner surface that tapers inward toward said drive stem in the direction of said upper end;
  • a retaining element having a conical outer surface that matches said conical inner surface adapted to be positioned around said drive stem;
  • cap means for contacting said flange and urging said retaining element into said collar.
  • a raise bit for enlarging a pilot hole into a larger diameter hole by disintegrating earth formations surrounding the pilot hole comprising:
  • a drive stem having an upper end for projecting into said pilot hole and a lower end;
  • a collar positioned around the lower end of said drive stem and connected to said cutter stage body, said collar having an inner conical surface that tapers inward toward said drive stern in the direction of said upper end;
  • a retaining element means positioned between said collar and said drive stem, said retaining element means having a tapered outer surface adapted to mate with said conical inner surface.
  • the raise bit of claim 7 including a flange projecting from said drive stem and a cap means positioned over said flange for urging said tapered surface into contact with said conical inner surface.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Dowels (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
US506667A 1974-09-16 1974-09-16 Removable stem for raise bits Expired - Lifetime US3917009A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US506667A US3917009A (en) 1974-09-16 1974-09-16 Removable stem for raise bits
CA232,223A CA1023340A (en) 1974-09-16 1975-07-25 Removable stem for raise bits
NO752679A NO143172C (no) 1974-09-16 1975-07-30 Borkrone for utvidelse av et styrehull.
ZA00755015A ZA755015B (en) 1974-09-16 1975-08-04 Removable stem for raise bits
AU84018/75A AU492359B2 (en) 1975-08-15 Removable stem for raise bits
ZM121/75A ZM12175A1 (en) 1974-09-16 1975-08-18 Removable stem for raise bits
FI752393A FI64836C (fi) 1974-09-16 1975-08-26 Stigskaer
SE7510119A SE414657B (sv) 1974-09-16 1975-09-11 Lostagbart skaft for borrkronor
FR7528014A FR2284751A1 (fr) 1974-09-16 1975-09-12 Tige amovible pour trepans de forage en remontee

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US506667A US3917009A (en) 1974-09-16 1974-09-16 Removable stem for raise bits

Publications (1)

Publication Number Publication Date
US3917009A true US3917009A (en) 1975-11-04

Family

ID=24015520

Family Applications (1)

Application Number Title Priority Date Filing Date
US506667A Expired - Lifetime US3917009A (en) 1974-09-16 1974-09-16 Removable stem for raise bits

Country Status (8)

Country Link
US (1) US3917009A (fi)
CA (1) CA1023340A (fi)
FI (1) FI64836C (fi)
FR (1) FR2284751A1 (fi)
NO (1) NO143172C (fi)
SE (1) SE414657B (fi)
ZA (1) ZA755015B (fi)
ZM (1) ZM12175A1 (fi)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3993147A (en) * 1976-01-19 1976-11-23 Dresser Industries, Inc. Taper lock removable stem for raise bit
US4007799A (en) * 1975-07-07 1977-02-15 Smith International, Inc. Raise drill with replaceable stem
US4011019A (en) * 1976-01-16 1977-03-08 Ingersoll-Rand Company Adjustable and disengagable earth raise borer stem
US4049067A (en) * 1975-11-05 1977-09-20 Ingersoll-Rand Company Cutter mounting extension apparatus
US4069878A (en) * 1976-03-08 1978-01-24 Reed Tool Company Raise drilling bit with detachable stem
US4108259A (en) * 1977-05-23 1978-08-22 Smith International, Inc. Raise drill with removable stem
DE2837038A1 (de) * 1977-09-09 1979-03-29 Sandvik Ab Bohrkopf fuer einen erweiterungsbohrer zum aufwaertsbohren
US4186809A (en) * 1978-11-06 1980-02-05 Dresser Industries, Inc. Steep angle raise bit
US4359114A (en) * 1980-12-10 1982-11-16 Robbins Machine, Inc. Raise drill bit inboard cutter assembly
US4410053A (en) * 1980-12-15 1983-10-18 Masse Roger F Apparatus for drilling hard material
US4448270A (en) * 1982-05-10 1984-05-15 Hughes Tool Company Variable diameter earth boring bit

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US827346A (en) * 1905-09-20 1906-07-31 Harry A Bubb Pulley.
US2556151A (en) * 1946-05-01 1951-06-05 Morse Chain Co Quick detachable hub
US2570604A (en) * 1946-03-09 1951-10-09 Siegerist Walter Mounting for sheaves and the like
US2819099A (en) * 1953-06-12 1958-01-07 Westinghouse Air Brake Co Flange union fitting with contractible lined wedge
US3231029A (en) * 1963-10-28 1966-01-25 Robbins & Assoc James S Articulated drilling shafts for raise drilling
US3659659A (en) * 1970-02-04 1972-05-02 Dresser Ind Large diameter bit with a replaceable stem
US3675729A (en) * 1970-05-08 1972-07-11 Smith International Bit lubrication system
US3738691A (en) * 1971-09-22 1973-06-12 D Firth Split contractible bushing
US3805901A (en) * 1972-08-10 1974-04-23 Ingersoll Rand Co Earth cutter assembly

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1373624A (fr) * 1963-11-09 1964-09-25 Dispositif de clavetage et de fixation et dispositif accessoire

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US827346A (en) * 1905-09-20 1906-07-31 Harry A Bubb Pulley.
US2570604A (en) * 1946-03-09 1951-10-09 Siegerist Walter Mounting for sheaves and the like
US2556151A (en) * 1946-05-01 1951-06-05 Morse Chain Co Quick detachable hub
US2819099A (en) * 1953-06-12 1958-01-07 Westinghouse Air Brake Co Flange union fitting with contractible lined wedge
US3231029A (en) * 1963-10-28 1966-01-25 Robbins & Assoc James S Articulated drilling shafts for raise drilling
US3659659A (en) * 1970-02-04 1972-05-02 Dresser Ind Large diameter bit with a replaceable stem
US3675729A (en) * 1970-05-08 1972-07-11 Smith International Bit lubrication system
US3738691A (en) * 1971-09-22 1973-06-12 D Firth Split contractible bushing
US3805901A (en) * 1972-08-10 1974-04-23 Ingersoll Rand Co Earth cutter assembly

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4007799A (en) * 1975-07-07 1977-02-15 Smith International, Inc. Raise drill with replaceable stem
US4049067A (en) * 1975-11-05 1977-09-20 Ingersoll-Rand Company Cutter mounting extension apparatus
US4011019A (en) * 1976-01-16 1977-03-08 Ingersoll-Rand Company Adjustable and disengagable earth raise borer stem
US3993147A (en) * 1976-01-19 1976-11-23 Dresser Industries, Inc. Taper lock removable stem for raise bit
US4069878A (en) * 1976-03-08 1978-01-24 Reed Tool Company Raise drilling bit with detachable stem
US4108259A (en) * 1977-05-23 1978-08-22 Smith International, Inc. Raise drill with removable stem
DE2837038A1 (de) * 1977-09-09 1979-03-29 Sandvik Ab Bohrkopf fuer einen erweiterungsbohrer zum aufwaertsbohren
US4228863A (en) * 1977-09-09 1980-10-21 Sandvik Aktiebolag Reamer bit for raise boring
US4186809A (en) * 1978-11-06 1980-02-05 Dresser Industries, Inc. Steep angle raise bit
US4359114A (en) * 1980-12-10 1982-11-16 Robbins Machine, Inc. Raise drill bit inboard cutter assembly
US4410053A (en) * 1980-12-15 1983-10-18 Masse Roger F Apparatus for drilling hard material
US4448270A (en) * 1982-05-10 1984-05-15 Hughes Tool Company Variable diameter earth boring bit

Also Published As

Publication number Publication date
CA1023340A (en) 1977-12-27
FR2284751A1 (fr) 1976-04-09
AU8401875A (en) 1977-02-17
FI64836B (fi) 1983-09-30
SE7510119L (sv) 1976-03-17
SE414657B (sv) 1980-08-11
FI752393A (fi) 1976-03-17
ZM12175A1 (en) 1976-10-21
NO752679L (fi) 1976-03-17
NO143172B (no) 1980-09-15
ZA755015B (en) 1976-07-28
FI64836C (fi) 1984-01-10
NO143172C (no) 1980-12-29

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Owner name: TAMROCK CANADA INC., A CORP. OF ONTARIO, CANADA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DRESSER INDUSTRIES, INC., A DE. CORP.;REEL/FRAME:004634/0252

Effective date: 19860909