US2830792A - Collar for drill steels - Google Patents

Collar for drill steels Download PDF

Info

Publication number
US2830792A
US2830792A US46207754A US2830792A US 2830792 A US2830792 A US 2830792A US 46207754 A US46207754 A US 46207754A US 2830792 A US2830792 A US 2830792A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
drill steel
sleeve
collar
drill
member
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
Inventor
Clarence E Sears
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.)
Ingersoll-Rand Co
Original Assignee
Ingersoll-Rand Co
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
Grant date

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D17/00Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S279/00Chucks or sockets
    • Y10S279/906Self grasping socket
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00Chucks or sockets
    • Y10T279/17Socket type
    • Y10T279/17042Lost motion
    • Y10T279/17085Key retainer
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00Chucks or sockets
    • Y10T279/17Socket type
    • Y10T279/17042Lost motion
    • Y10T279/17094Sleeve type retainer
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00Chucks or sockets
    • Y10T279/34Accessory or component
    • Y10T279/3406Adapter
    • Y10T279/3418Adapter for particular tool or workpiece
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49863Assembling or joining with prestressing of part
    • Y10T29/4987Elastic joining of parts
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49908Joining by deforming
    • Y10T29/49936Surface interlocking
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49908Joining by deforming
    • Y10T29/49938Radially expanding part in cavity, aperture, or hollow body
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/45Flexibly connected rigid members
    • Y10T403/455Elastomer interposed between radially spaced members

Description

APril 1958 c. E. SEARS 2,830,792

COLLAR FOR DRILL STEELS Filed Oct. 13, 1954 'a g. V 4

L BY/III/II/l "(I/Ill Ill/l Il/JL/ INVENTOR FIG-4 CLARENCE E. SEARS Fla-2 BY ms ATTORNEY United States Patents COLLAR FOR DRILL STEELS Clarence E. Sears, Sherbrooke, Quebec, Canada, assignor to Ingersoll-Rand Company, New York, N. Y., a corporation of New Jersey Application October 13, 1954, Serial No. 462,077

7 Claims. (Cl. 255-37) This invention relates to drill steels, and more particularly to a collar that is readily attachable to the shank portion of a drill steel.

Drill steels of the type to which the present invention pertains are used in percussive rock drills equipped with retainers for cooperation with the collar to maintain within workable limits the shank length recommended by the manufacturers as well as to retain the shank end of the drill steel in the rock drill and to interlockingly engage the collar for withdrawing the drill steel from a drill hole. i

Heretofore, it has been customary to form the collar by upsetting a portion of the steel at a point chosen as the juncture of the body portion of the steel and its shank. This mode of forming the collar requires repeated heating and forging operations, and in the case of hollow drill steels it becomes necessary to pin-out the material that flows into the passage in the drill steel after each forging operation.

These operations, as will be readily appreciated, require a considerable degree of skill and numerous and costly mechanisms for carrying them out, and in many instances defects develop in the area of the collar that cause failure of the drill steel when subjected to the heavy stresses of drilling. i

It is accordingly an object of this invention to obviate the need of disturbing the initial form of a drill steel requiring a collar.

Another object is, to enable a drill steel to be expeditiously equipped with a collar without the need of special skill or costly machinery.

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

In the drawings accompanying this specification and in which similar reference numerals refer to similar parts,

Figure l is a side elevation of the front end portion of a rock drill and a drill steel having its shank end extending into the rock drill, the drill steel being equipped with a collar constructed in accordance with the practice of the invention,

Fig. 2 is an elevation, partly in section, of a drill steel and a collar afiixed thereto,

Fig. 3 is a transverse view through Fig. 2 on the line 3-3,

Fig. 4 is a fragmentary portion of the casing parts of the collar showing them in position for attachment to each other,

5 is a view similar to Fig.4 showing the casing parts permanently secured together, i

Fig. 6 is an elevation, partly in section, of the shank portion of a drill steel, a collar and a pilot seated upon the end of the drill steel for guiding the collar onto the drill steel, and

Fig. 7 is a transverse view taken through Fig. 6 on the line 7-7.

Referring to the drawings and at first more particular- Patented Apr. 15, 1958 1y to Figure 1, 20 designates the front end portion of a rock drill, 21 a drill steel actuated by the hammer piston 22 of the rock drill and 23 a retainer for preventing ejection of the drill steel from the rock drill. The casing of the rock drill 20 is provided, as is customary, with trunnions 24 to support the retainer 23, and the yoke 25 of the retainer partly encircles the drill steel 21 at a point forwardly of the collar 26.

The collar 26 comprises an elongated member 27 in the form of a sleeve that may be shaped internally to conform to the contour of the drill steel 21 or may, if desired, be of cylindrical shape to receive drill steels of corresponding or polygonal shapes. The member is constructed of elastic material, as for example rubber or neoprene which is readily deformable and may, therefore, be conveniently constricted and pressed into firm gripping engagement with the drill steel.

In a preferred form, the member 27 is exteriorly of cylindrical shape and its bore 23 comprises a similarly shaped intermediate portion 29 of smaller diameter than the drill steel. The front and rear end portions 30 and 31 of the bore 28 flare outwardly toward the ends of the member to accommodate the material that is displaced at the intermediate portion of the member during the operation of attaching the collar to the drill steel.

The member 27 is encased'in a sleeve 32 to which its peripheral surface 33 is bonded and is of somewhat less length than the sleeve. The front end 34 of the member 27 initially lies flush with the corresponding end of the sleeve and some of the material of the member 27 will then protrude from the sleeve when attached to the drill steel 21, as indicated at 35 in Figs. 1 and 2 of the drawings, to cushion the blow of the collar against the yoke 25, Owing to the difference in lengths between the sleeve 32 and the member 27 a space 36 will remain in the rearward end of the sleeve into which the material of the member displaced by the drill steel may flow. The space 36 is, however, of sufficient length to preclude the complete filling of the space 36 in order to avoid contact of the rearward end of the member 27 with a cap 37 on the adjacent end of the sleeve and thereby enable the member to yield slightly when the collar assembly is thrust against the rock drill or the retainer. The cap 37 serves as a buffer for the sleeve to protect it against damage upon impact of the colar against the front end of the rock drill, as when the drill steel rebounds from the working surface.

The cap 37 has an aperture 38 therethrough to slidably receive the drill steel, and in the forward surface of the cap is an annular groove 39 the sides 40 of which diverge from the open end of the groove. The bottom of the groove consists of a pair of inclined surfaces 41 that define an annular edge 42 at the line of convergence to engage the end of the sleeve and swage the adjacent portion thereof into firm engagement with the side surfaces 46 of the groove. Such flaring of the sleeve within the groove may be readily effected by the force of the impact of the sleeve against the edge 42 when the collar assembly I is thrust against the rock drill by the drill steel.

Whenever it is intended to attach a collar to a drill steel, the assembly comprising the member 27, the sleeve 32 and with the cap 37 loosely seated upon the sleeve are disposed upon a pilot 43 of cone shape seated upon the rearward end of the drill steel. Pressure of a suitable value is then applied to the cap 37 and the assembly is forced thereby along the pilot which will gradually displace the material of the member 27. When the member 27 passes over the large end of the pilot it will be interiorly of the correct size and shape to receive the drill steel and the collar may then be slid along the length thereof to the desired location.

In actual practice, it has been found that the collar will remain in the correct assembled position throughout the life of the drill steel, irrespective of any jars or shocks it may re'eeive in service and 'that, although pressed inrm'ovably" against the steel by the sleeve 32, the member 27 retains sulfici'en't resiliency to-adequately cushion the blows of the sleeve against the rock drilland the retainer 23 and thereby minimize damage to the collar assembly.

T claim:

l. The combination with a drill steel, of a collar including an elastic member to encircle the drill steel, a sleeve to encircle and constrict the elastic memberinto firm grippinge'ngagement with the drill steel, and a cap on one end of the sleeve having a sliding fit on the drill steel and having its inner side surface spaced from the adjacent end of said member.

2'. The combination with a' drill steel, of a. collar including an elastic member to encirclethe drill steel, a sleeve to encircle and constrict the elastic member into firm gripping engagement with the drill steel and being bo'nrledto the peripheral surface of the elastic member and being positioned on said member such that one end portion of the sleeve extends beyond the associated end of said member, and a cap on said end of the sleeve and having a slidingfi t on the drill steel.

3. The combination with a drill steel, of a collar including an elastic member to encircle the drill steel and having a smaller internal diameter when unstressed than the diameter of the drill steel, a sleeve to encircle and constrict the elastic member into firm gripping engagement with the drill steel and being bonded to the peripheral surface of the elastic member, the unstressed outside dimensions of said member correponding substantially to the internal dimensions of said sleeve, and a cap on one end of the sleeve having a sliding fit on the drill steel.

4. The combination with a drill steel, of a collar including an elastic member to encircle the drill steel, a sleeve of greater length than the unstressed length of the elastic member to encircle and constrict said member into firm gripping engagement with the drill steel and having one end initially flush with an end of the elastic member, said sleeve being bonded to the elastic member, and a separate cap mounted on the other end of the sleeve having a sliding fit on the drill steel.

5". The'combination with a drill steel, of an elastic member to encircle the drill steel and having a smaller internal diameter than the diameter of the drill steel, a sleeve to encircle and constrict the elastic member into firm gripping engagement with the drill steel and being bonded to the elastic member, a cap having a sliding fit on the drill steel and having an annular groove of dovetail cross-sectionin one side thereof, and a flared end on the sleeve lying Within the groove to secure the cap to the sleeve.

6. The combination with a drill steel, of an elastic member to encircle a drill steel, a sleeve to encircle and constrict the elastic member into firm gripping engagement with the drill steel, a capfor the sleeve encircling the drill steel and having an annular groove in one side to receive an end portion of the sleeve, and means at the bottom of the groove to swage such end portion of the sleeve into firm engagement with the sides of the groove accordingly as the end portion of the sleeve is driven into the groove.

7. The combination with a drill steel, of an elastic member to encircle a drill steel, a sleeve to encircle and constrict the elastic member into firm gripping engagement with the drill steel, a cap for the sleeve encircling the drill steel and having an annular groove of dove-tail cross-section in one side to receive an end portion of the sleeve, and a Wedge-shaped bottom in the groove to swage such end portion into firm engagement with the sides of the groove accordingly as said end portion is driven into the groove.

References Cited in the file of this patent UNITED STATES PATENTS Great'Britain Mar. 31, 1943

US2830792A 1954-10-13 1954-10-13 Collar for drill steels Expired - Lifetime US2830792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US2830792A US2830792A (en) 1954-10-13 1954-10-13 Collar for drill steels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2830792A US2830792A (en) 1954-10-13 1954-10-13 Collar for drill steels

Publications (1)

Publication Number Publication Date
US2830792A true US2830792A (en) 1958-04-15

Family

ID=23835082

Family Applications (1)

Application Number Title Priority Date Filing Date
US2830792A Expired - Lifetime US2830792A (en) 1954-10-13 1954-10-13 Collar for drill steels

Country Status (1)

Country Link
US (1) US2830792A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997024A (en) * 1960-01-13 1961-08-22 Lord Mfg Co Rock drill collar
US3065004A (en) * 1960-03-30 1962-11-20 Laich Hermann Pipe mounting
US3161242A (en) * 1960-05-31 1964-12-15 Skil Corp Rotary-hammer devices and tool element accessories therefor
US3209437A (en) * 1962-04-13 1965-10-05 Voorhies Carl Method of securing together two members
US3593933A (en) * 1967-08-14 1971-07-20 Bemberg Ag Device for the slip-free coupling of a drive shaft to a winding sleeve
US3673672A (en) * 1969-11-26 1972-07-04 Philip Morris Inc Method of joining two bodies in captive, independently rotatable assembly
US3783970A (en) * 1972-06-07 1974-01-08 Thor Power Tool Co Sound attenuating device for a work steel or the like
US4175757A (en) * 1977-06-15 1979-11-27 Fansteel Inc. Sealant system for roof drilling apparatus
DE2920139A1 (en) * 1979-05-18 1980-11-20 Ruhrkohle Ag Impact drill bit for underground mining - has additional weights arranged as collars surrounding bits
US4336848A (en) * 1978-10-10 1982-06-29 Robert Bosch Gmbh Tool holder for impact device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1679324A (en) * 1924-07-19 1928-07-31 Thomas E Murray Valve bonnet and the like
GB332914A (en) * 1929-04-12 1930-07-14 Johannesburg Cons Invest Compa Improvements in or relating to drill steels
GB346217A (en) * 1930-05-31 1931-04-09 Henry Samuel Potter Improvements in rock drill shanks, steels or the like
GB552305A (en) * 1941-12-03 1943-03-31 Climax Rock Drill & Engineering Works Ltd Improvements relating to percussive drills
US2468985A (en) * 1943-11-26 1949-05-03 Goodrich Co B F Resilient connection and method of making same
US2685274A (en) * 1951-04-12 1954-08-03 Phyllis E Liddicoat Pneumatic tool
US2757028A (en) * 1948-12-30 1956-07-31 Ehrenreich & Cie A Steering rods for motor vehicles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1679324A (en) * 1924-07-19 1928-07-31 Thomas E Murray Valve bonnet and the like
GB332914A (en) * 1929-04-12 1930-07-14 Johannesburg Cons Invest Compa Improvements in or relating to drill steels
GB346217A (en) * 1930-05-31 1931-04-09 Henry Samuel Potter Improvements in rock drill shanks, steels or the like
GB552305A (en) * 1941-12-03 1943-03-31 Climax Rock Drill & Engineering Works Ltd Improvements relating to percussive drills
US2468985A (en) * 1943-11-26 1949-05-03 Goodrich Co B F Resilient connection and method of making same
US2757028A (en) * 1948-12-30 1956-07-31 Ehrenreich & Cie A Steering rods for motor vehicles
US2685274A (en) * 1951-04-12 1954-08-03 Phyllis E Liddicoat Pneumatic tool

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997024A (en) * 1960-01-13 1961-08-22 Lord Mfg Co Rock drill collar
US3065004A (en) * 1960-03-30 1962-11-20 Laich Hermann Pipe mounting
US3161242A (en) * 1960-05-31 1964-12-15 Skil Corp Rotary-hammer devices and tool element accessories therefor
US3209437A (en) * 1962-04-13 1965-10-05 Voorhies Carl Method of securing together two members
US3593933A (en) * 1967-08-14 1971-07-20 Bemberg Ag Device for the slip-free coupling of a drive shaft to a winding sleeve
US3673672A (en) * 1969-11-26 1972-07-04 Philip Morris Inc Method of joining two bodies in captive, independently rotatable assembly
US3783970A (en) * 1972-06-07 1974-01-08 Thor Power Tool Co Sound attenuating device for a work steel or the like
US4175757A (en) * 1977-06-15 1979-11-27 Fansteel Inc. Sealant system for roof drilling apparatus
US4336848A (en) * 1978-10-10 1982-06-29 Robert Bosch Gmbh Tool holder for impact device
DE2920139A1 (en) * 1979-05-18 1980-11-20 Ruhrkohle Ag Impact drill bit for underground mining - has additional weights arranged as collars surrounding bits

Similar Documents

Publication Publication Date Title
US3583501A (en) Rock bit with powered gauge cutter
US3498677A (en) Cutting apparatus
US3397012A (en) Cutter bits and means for mounting them
US3397013A (en) Cutter bits and means for mounting them
US6502650B1 (en) Percussive down-the-hole hammer for rock drilling, and a drill bit used therein
US3957307A (en) Rough cutter mining tool
US2452277A (en) Tube coupling
US3968843A (en) Pneumatic percussion tool having a vibration dampened handle
US6331035B1 (en) Cutting tool holder assembly with press fit
US5782311A (en) Method and apparatus for installation of underground pipes
US6009644A (en) Tooth wedge assembly
US6176552B1 (en) Cutting bit support member with undercut flange for removal
US3817146A (en) Bolt hole aligner and inserting tool
US4519536A (en) Apparatus for driving nails using an impact hammer
US3517754A (en) Rock drill bit drive
US2380068A (en) Oil seal puller
US6135461A (en) Chuck for drilling and chiseling tools
US5699867A (en) Bit retention device for a bit and chuck assembly of a down-the-hole, percussive drill
US3820848A (en) Rotary mining tool and keeper arrangement therefor
US4749049A (en) Hand-guided impact hammer and hammer drill
US4561508A (en) Roller-reamer
US2435847A (en) Shovel tooth
US3363445A (en) Blind riveting
US6244665B1 (en) Cutting toolholder with recessed groove for cutting tool removal
US6585326B2 (en) Bit holders and bit blocks for road milling, mining and trenching equipment