US20120049608A1 - Retainer for rotatable cutting bit - Google Patents
Retainer for rotatable cutting bit Download PDFInfo
- Publication number
- US20120049608A1 US20120049608A1 US13/036,124 US201113036124A US2012049608A1 US 20120049608 A1 US20120049608 A1 US 20120049608A1 US 201113036124 A US201113036124 A US 201113036124A US 2012049608 A1 US2012049608 A1 US 2012049608A1
- Authority
- US
- United States
- Prior art keywords
- retainer
- engaging member
- cylindrical sleeve
- cutting tool
- inward engaging
- 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.)
- Abandoned
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 68
- 230000000717 retained effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011236 particulate material Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
Definitions
- the invention pertains to an earth working, mining, or construction bit, and more particularly, to a retainer wear sleeve for holding a rotatable cutting bit in a mounting block that is affixed to a movable member.
- Rotatable cutting bits held within a mounting block affixed to a movable member are utilized to perform various excavating operations, which include applications relating to the removal of minerals as well as applications relating to road planning, trenching, concrete cutting and other construction applications.
- Prior art cutting bits have utilized an enlarged diameter or sharply stepped rearward portion of the bit as an abutment to retain a cylindrical retainer or clip captive on the bit.
- the rearward portion of the bit contacts the cylindrical wall of the bore so that wear on certain portions of the bore occurs as the bit rotates in the mounting block.
- U.S. Pat. No. 4,850,649 to Wayne H. Beach, et al. provides a retainer wear sleeve which protects the bore of the block from wear due to contact with the shank of the cutting bit during operation. Such a retainer wear sleeve increases the life of the block since contact between the shank and the bore of the block is reduced.
- This '649 patent discloses a retainer wear sleeve either having projecting dimples, an annular projection or equi-spaced circumferential projections which are received within an annular channel of the cutting bit for retaining the sleeve to the shank of the bit.
- An aspect of the present invention is to provide a retainer for a rotatable cutting bit for mounting and retaining the rotatable cutting bit in a bore of a block that is affixed to a movable member.
- the invention comprises a retainer and a cutting tool or bit for mounting in the bore of the block wherein the cutting tool comprises an elongated bit body generally symmetrical about a longitudinal axis.
- the elongated body has forward and rearward portions wherein the forward portion terminates in a front end at which there is a cutting tip and the rearward portion is of a generally constant diameter and terminates in a rear end.
- the rearward portion contains an annular channel or groove adjacent the rear end thereof.
- a resilient retainer comprising a wear sleeve surrounds substantially the peripheral rearward shank portion and extends rearwardly past the rear end and has an inward engaging member received within the annular channel so that the elongated body and retainer are retained together.
- the retainer has an unstressed diameter greater than the diameter of the bore so that when the cutting tool is inserted into the bore, the retainer expands against the bore so as to be held therein.
- the retainer comprises an inward engaging member comprising a constant cross-sectional shape.
- the inward engaging member has a generally symmetrical shape about a central longitudinal axis thereof.
- the inward engaging member may have a generally rectangular cross-sectional shape.
- the annular channel of the cutting bit has an inward surface which corresponds in shape to the inward engaging member, e.g. generally rectangular, of the retainer so that the inward engaging member is received in the annular channel when the retainer is mounted around the shank of the cutting bit, resulting in the retainer and cutting bit being retained together.
- FIG. 1 is a side view of a cutting bit-block assembly wherein the cutting bit is inserted into the block and the block is affixed to a movable member.
- FIG. 2 is the cutting body of FIG. 1 and a retainer of the invention.
- FIG. 3 is the retainer of the invention mounted onto the shank of a cutting tool.
- FIG. 4 is a cross-sectional view of the retainer of FIG. 2 .
- FIG. 5 is an end view of the retainer of FIG. 4 .
- FIG. 6 is a sketch of a cutting body and a retainer of the invention similar to that of FIG. 2 .
- FIG. 7 is a perspective view of the cylindrical sleeve of the retainer of FIG. 6 .
- FIG. 8 is an open flat cross sectional view of the cylindrical sleeve of FIG. 7 .
- FIG. 1 a cutting assembly generally designated as 10 which is mounted to a rotatable or movable member 12 .
- the rotatable or movable member may comprise a mining wheel, a road planning drum, a bucket blade, a grader blade or the like.
- the cutting assembly 10 includes a block 14 having a front face 16 , a rear face 18 , and a mounting face 20 .
- block 14 includes a generally cylindrical bore having a frusto-conically shaped seating surface adjacent the front face 16 thereof.
- the block 14 is affixed at the mounting face 20 to the rotatable member 12 such as by welding or the like.
- cutting assembly 10 further includes a rotatable or movable cutting tool or bit generally designated as 30 .
- Cutting bit 30 includes an elongated steel body 32 having integral forward and rearward portions 34 and 36 , respectively.
- An annular frusto-conically shaped shoulder 38 joins the forward and rearward portions.
- Body 32 further includes an annular shoulder 40 positioned forwardly of annular shoulder 38 .
- Forward portion 34 includes a flat front face 42 having a socket (not shown) contained therein in which a cutting tip 44 is affixed such as by brazing.
- Cutting tip 44 is made from a hard material such as a cemented tungsten carbide.
- the rearward portion 36 of steel body 32 terminates in a flat rear end 46 and contains an annular channel 50 positioned forwardly of the flat rear end 46 .
- a constant diameter cylindrical portion 52 then joins the annular channel 50 with the annular shoulder 38 .
- a retainer generally designated as 54 surrounds substantially the rearward portion 36 of the cutting bit body 32 .
- the retainer 54 serves two basic purposes. The first is to retain the bit body 32 in the block 14 , and the second is to protect the block 14 from wear by functioning as a wear sleeve between the bit body 32 and the block 14 .
- retainer 54 comprises an elongate cylindrical sleeve 56 having a forward portion 58 and a rearward portion 60 .
- the forward portion 58 terminates in a generally circularly-shaped front edge 62 and the rearward portion 60 terminates in a generally circularly-shaped rearward edge 64 .
- the forward portion 58 of cylindrical sleeve 56 contains an inward engaging member 66 positioned forwardly of the juncture between the forward and rearward portions 58 , 60 of sleeve 56 .
- the inward engaging member 66 may have, for example, a generally rectangular cross-sectional shape as shown in the Figures. However, it will be appreciated that the inward engaging member 66 may have other shapes as well in accordance with the invention.
- the retainer 54 is positioned relative to the cutting bit body 32 so as to surround the rearward portion 36 thereof whereby the inward engaging member 66 is received within the annular channel 50 of cylindrical portion 52 of body bit 32 .
- the annular channel 50 has an inward surface which corresponds in shape to the inward engaging member 66 , e.g. generally rectangular, so that the inward engaging member 66 is received in the annular channel 50 .
- the diameter of the forward portion 58 and rearward portion 60 of sleeve 56 of retainer 54 in an unstressed condition is larger than the diameter of the bore of block 14 . Consequently, when the assembly of the cutting bit body 32 and the retainer 54 is inserted into the bore of the block 14 , the diameter of the forward portion 58 and the rearward portion 60 of the retainer 54 is radially compressed whereby when inside the bore, the retainer 54 expands against the bore so as to be securely held therein. Inward engaging member 66 of retainer 54 is received within annular channel or groove 50 so as to retain the cutting bit body 32 and retainer 54 together.
- inward engaging member 66 relative to the annular channel or groove 50 and the cylindrical sleeve 56 itself relative to the rearward portion 36 of the cutting bit body 32 are as such that the cutting bit 30 is free to rotate relative to the retainer 54 and the block 14 when the cutting bit-retainer assembly is inserted into the bore of block 14 .
- the cutting bit body 32 is rotatably retained by the retainer 54 which is securely held in the bore of block 14 . The end result being that the bit is rotatably mounted within the block 14 .
- FIG. 5 shows that retainer 54 is a split ring wherein the longitudinal edges 70 and 72 of sleeve 56 of retainer 54 form an opening defined by the edges 70 and 72 .
- retainer 54 is mounted around body bit 32 such that the inward engaging member 66 enters and is received in annular channel or groove 50 .
- FIG. 7 illustrates that the inward engaging member 66 of the cylindrical sleeve 56 is an annular radial projection extending circumferentially around the inner surface 78 of cylindrical sleeve 56 .
- the inward engaging member 66 has a constant cross-sectional shape.
- the shape of the inward engaging member 66 remains the same from where it contacts the inner surface 78 of the cylindrical sleeve 56 to its inner most portion 67 that extends inwardly toward the center portion of the sleeve 56 .
- the shape of the inward engaging member may be characterized as generally symmetrical about a longitudinal central axis CL thereof (see FIG. 7 ).
- the axis CL extends generally parallel to the vertical wall 57 of the sleeve 56 .
- the cylindrical sleeve 56 comprises a T-shape configuration along the longitudinal axis of the cylindrical sleeve 56 .
- retainer 54 is made of a hard material, for example, steel.
- the inward engaging member 66 of cylindrical sleeve 56 generally has a rectangular cross section and as shown particularly in FIG. 6 , annular channel 50 of the shank of body bit 32 generally has a rectangular cross-sectional surface 68 that corresponds to the rectangular cross section of engaging member 66 of cylindrical sleeve 56 so that when retainer 56 is positioned around body bit 32 , the inward engaging member 66 enters into the annular channel 50 of body bit 32 .
- This structure for retainer 52 is advantageous in that more surface area is provided thereby resulting in a more sturdy structure for retainer 52 .
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
Abstract
A retainer for mounting and retaining a rotatable cutting tool or bit in a block bore. The cutting tool contains an annular channel. The retainer has an unstressed diameter greater than the diameter of the bore so that when the cutting tool is inserted into the bore, the retainer expands against the bore so as to be held therein along with the cutting tool. The retainer comprises a cylindrical sleeve having an engaging member extending circumferentially around the sleeve and having a constant cross section shape which projects into the annular channel of the cutting tool and which annular channel has an inward rectangular surface corresponding to the inward engaging member of the retainer for receiving and retaining the retainer to the cutting tool.
Description
- This application claims the benefit of U.S. Provisional Patent Application Ser. No. 61/317,719 filed Mar. 26, 2010, which is fully incorporated herein by reference.
- The invention pertains to an earth working, mining, or construction bit, and more particularly, to a retainer wear sleeve for holding a rotatable cutting bit in a mounting block that is affixed to a movable member.
- Rotatable cutting bits held within a mounting block affixed to a movable member, such as a mining wheel or road planning drum, are utilized to perform various excavating operations, which include applications relating to the removal of minerals as well as applications relating to road planning, trenching, concrete cutting and other construction applications.
- Prior art cutting bits have utilized an enlarged diameter or sharply stepped rearward portion of the bit as an abutment to retain a cylindrical retainer or clip captive on the bit. In operation of the prior art bits and retainers, the rearward portion of the bit contacts the cylindrical wall of the bore so that wear on certain portions of the bore occurs as the bit rotates in the mounting block. U.S. Pat. No. 4,850,649 to Wayne H. Beach, et al. provides a retainer wear sleeve which protects the bore of the block from wear due to contact with the shank of the cutting bit during operation. Such a retainer wear sleeve increases the life of the block since contact between the shank and the bore of the block is reduced.
- During the cutting operation, a large volume of particulate materials are generated. These particulates tend to infiltrate the bore of the block-bit assembly, and collect in the volume between the rear shank and the retainer wear sleeve. The prior art cutting bits having an enlarged diameter or sharply stepped rearward portion have trapped these contaminates, and impaired the ability of the bit either to rotate in the bore of or to be efficiently removed from the block. The retainer wear sleeve of the above mentioned U.S. Pat. No. 4,850,649 to Wayne H. Beach, et al. reduces the tendency of particulate material being trapped between the sleeve and the shank. This '649 patent discloses a retainer wear sleeve either having projecting dimples, an annular projection or equi-spaced circumferential projections which are received within an annular channel of the cutting bit for retaining the sleeve to the shank of the bit.
- There is a need to provide a retainer for a rotatable cutting bit which is sturdier than known retainer wear sleeves.
- There is a further need to provide a retainer for a rotatable cutting bit that comprises an engaging member projecting into an annular channel of the cutting bit and which engaging member has a cross-sectional area that is greater than the engaging devices of known retainer wear sleeves.
- An aspect of the present invention is to provide a retainer for a rotatable cutting bit for mounting and retaining the rotatable cutting bit in a bore of a block that is affixed to a movable member. In one aspect, the invention comprises a retainer and a cutting tool or bit for mounting in the bore of the block wherein the cutting tool comprises an elongated bit body generally symmetrical about a longitudinal axis. The elongated body has forward and rearward portions wherein the forward portion terminates in a front end at which there is a cutting tip and the rearward portion is of a generally constant diameter and terminates in a rear end. The rearward portion contains an annular channel or groove adjacent the rear end thereof. A resilient retainer comprising a wear sleeve surrounds substantially the peripheral rearward shank portion and extends rearwardly past the rear end and has an inward engaging member received within the annular channel so that the elongated body and retainer are retained together. The retainer has an unstressed diameter greater than the diameter of the bore so that when the cutting tool is inserted into the bore, the retainer expands against the bore so as to be held therein. In one aspect, the retainer comprises an inward engaging member comprising a constant cross-sectional shape. In another aspect, the inward engaging member has a generally symmetrical shape about a central longitudinal axis thereof. In another aspect, the inward engaging member may have a generally rectangular cross-sectional shape. The annular channel of the cutting bit has an inward surface which corresponds in shape to the inward engaging member, e.g. generally rectangular, of the retainer so that the inward engaging member is received in the annular channel when the retainer is mounted around the shank of the cutting bit, resulting in the retainer and cutting bit being retained together.
- These and various other features and advantages will be apparent from the following drawings and detailed description.
-
FIG. 1 is a side view of a cutting bit-block assembly wherein the cutting bit is inserted into the block and the block is affixed to a movable member. -
FIG. 2 is the cutting body ofFIG. 1 and a retainer of the invention. -
FIG. 3 is the retainer of the invention mounted onto the shank of a cutting tool. -
FIG. 4 is a cross-sectional view of the retainer ofFIG. 2 . -
FIG. 5 is an end view of the retainer ofFIG. 4 . -
FIG. 6 is a sketch of a cutting body and a retainer of the invention similar to that ofFIG. 2 . -
FIG. 7 is a perspective view of the cylindrical sleeve of the retainer ofFIG. 6 . -
FIG. 8 is an open flat cross sectional view of the cylindrical sleeve ofFIG. 7 . - Referring to the drawings, there is illustrated in
FIG. 1 a cutting assembly generally designated as 10 which is mounted to a rotatable ormovable member 12. Although not intended to be limiting, the rotatable or movable member may comprise a mining wheel, a road planning drum, a bucket blade, a grader blade or the like. Thecutting assembly 10 includes ablock 14 having afront face 16, arear face 18, and amounting face 20. As disclosed in the above discussed U.S. Pat. No. 4,850,649, which is incorporated herein by reference,block 14 includes a generally cylindrical bore having a frusto-conically shaped seating surface adjacent thefront face 16 thereof. As can be appreciated fromFIG. 1 , theblock 14 is affixed at themounting face 20 to therotatable member 12 such as by welding or the like. - Referring to
FIGS. 1-3 ,cutting assembly 10 further includes a rotatable or movable cutting tool or bit generally designated as 30.Cutting bit 30 includes anelongated steel body 32 having integral forward andrearward portions shaped shoulder 38 joins the forward and rearward portions.Body 32 further includes anannular shoulder 40 positioned forwardly ofannular shoulder 38. -
Forward portion 34 includes a flatfront face 42 having a socket (not shown) contained therein in which acutting tip 44 is affixed such as by brazing.Cutting tip 44 is made from a hard material such as a cemented tungsten carbide. - The
rearward portion 36 ofsteel body 32 terminates in a flatrear end 46 and contains anannular channel 50 positioned forwardly of the flatrear end 46. A constant diametercylindrical portion 52 then joins theannular channel 50 with theannular shoulder 38. - As illustrated in
FIGS. 2 and 3 , a retainer generally designated as 54 surrounds substantially therearward portion 36 of thecutting bit body 32. Theretainer 54 serves two basic purposes. The first is to retain thebit body 32 in theblock 14, and the second is to protect theblock 14 from wear by functioning as a wear sleeve between thebit body 32 and theblock 14. - Referring to
FIGS. 4 , 6, and 7,retainer 54 comprises an elongatecylindrical sleeve 56 having aforward portion 58 and arearward portion 60. Theforward portion 58 terminates in a generally circularly-shapedfront edge 62 and therearward portion 60 terminates in a generally circularly-shapedrearward edge 64. - The
forward portion 58 ofcylindrical sleeve 56 contains an inwardengaging member 66 positioned forwardly of the juncture between the forward andrearward portions sleeve 56. In one aspect, the inwardengaging member 66 may have, for example, a generally rectangular cross-sectional shape as shown in the Figures. However, it will be appreciated that the inwardengaging member 66 may have other shapes as well in accordance with the invention. As can be appreciated fromFIGS. 2 and 3 , theretainer 54 is positioned relative to thecutting bit body 32 so as to surround therearward portion 36 thereof whereby the inwardengaging member 66 is received within theannular channel 50 ofcylindrical portion 52 ofbody bit 32. In one aspect, theannular channel 50 has an inward surface which corresponds in shape to the inward engagingmember 66, e.g. generally rectangular, so that the inward engagingmember 66 is received in theannular channel 50. - The diameter of the
forward portion 58 andrearward portion 60 ofsleeve 56 ofretainer 54 in an unstressed condition is larger than the diameter of the bore ofblock 14. Consequently, when the assembly of the cuttingbit body 32 and theretainer 54 is inserted into the bore of theblock 14, the diameter of theforward portion 58 and therearward portion 60 of theretainer 54 is radially compressed whereby when inside the bore, theretainer 54 expands against the bore so as to be securely held therein. Inward engagingmember 66 ofretainer 54 is received within annular channel or groove 50 so as to retain the cuttingbit body 32 andretainer 54 together. The dimensioning of inward engagingmember 66 relative to the annular channel orgroove 50 and thecylindrical sleeve 56 itself relative to therearward portion 36 of the cuttingbit body 32 are as such that the cuttingbit 30 is free to rotate relative to theretainer 54 and theblock 14 when the cutting bit-retainer assembly is inserted into the bore ofblock 14. As can be appreciated, the cuttingbit body 32 is rotatably retained by theretainer 54 which is securely held in the bore ofblock 14. The end result being that the bit is rotatably mounted within theblock 14. -
FIG. 5 shows thatretainer 54 is a split ring wherein thelongitudinal edges sleeve 56 ofretainer 54 form an opening defined by theedges FIG. 6 ,retainer 54 is mounted aroundbody bit 32 such that the inward engagingmember 66 enters and is received in annular channel orgroove 50.FIG. 7 illustrates that the inward engagingmember 66 of thecylindrical sleeve 56 is an annular radial projection extending circumferentially around theinner surface 78 ofcylindrical sleeve 56. - As particularly shown in
FIGS. 4 , 6 and 7, the inward engagingmember 66 has a constant cross-sectional shape. In other words, the shape of the inward engagingmember 66 remains the same from where it contacts theinner surface 78 of thecylindrical sleeve 56 to its innermost portion 67 that extends inwardly toward the center portion of thesleeve 56. In addition, the shape of the inward engaging member may be characterized as generally symmetrical about a longitudinal central axis CL thereof (seeFIG. 7 ). In one aspect, the axis CL extends generally parallel to thevertical wall 57 of thesleeve 56. - As shown in
FIG. 8 , thecylindrical sleeve 56 comprises a T-shape configuration along the longitudinal axis of thecylindrical sleeve 56. It is to be appreciated thatretainer 54 is made of a hard material, for example, steel. - As best shown in
FIGS. 6 , 7 and 8, the inward engagingmember 66 ofcylindrical sleeve 56 generally has a rectangular cross section and as shown particularly inFIG. 6 ,annular channel 50 of the shank ofbody bit 32 generally has a rectangularcross-sectional surface 68 that corresponds to the rectangular cross section of engagingmember 66 ofcylindrical sleeve 56 so that whenretainer 56 is positioned aroundbody bit 32, the inward engagingmember 66 enters into theannular channel 50 ofbody bit 32. This structure forretainer 52 is advantageous in that more surface area is provided thereby resulting in a more sturdy structure forretainer 52. - The implementation described above and other implementations are within the scope of the described invention and the following claims.
Claims (20)
1. A cutting tool for mounting in the bore of a block, the cutting tool, comprising:
an elongated body generally symmetrical about a longitudinal axis having forward and rearward portions, the forward portion terminating in a front end at which there is a cutting tip, the rearward portion being of a generally constant diameter and terminating in a rear end;
the rearward portion containing an annular channel adjacent the rear end;
a resilient retainer surrounding substantially the rearward portion, the retainer comprising a cylindrical sleeve being axially split along the entire length thereof, the sleeve having opposite front and rear ends, and having an inward engaging member received within the annular channel so that the elongated body and retainer are retained together; and
wherein the inward engaging member of the resilient retainer comprises a constant cross sectional shape extending circumferentially around the cylindrical sleeve.
2. The cutting tool of claim 1 , wherein the annular channel has generally the same cross sectional shape as the inward engaging member.
3. The cutting tool of claim 1 , wherein the inward engaging member has a generally rectangular cross sectional shape.
4. The cutting tool of claim 3 , wherein the annular channel of the rearward portion of the elongated body of the cutting tool has an inward rectangular surface corresponding to the generally rectangular cross sectional shape of the inward engaging member of the cylindrical sleeve.
5. The cutting tool of claim 1 , wherein the inward engaging member of the cylindrical sleeve is an annular radial projection extending around the circumferential inner surface of the cylindrical sleeve.
6. The cutting tool of claim 1 , wherein the cylindrical sleeve and the inward engaging member of the cylindrical sleeve form a T-shape configuration along the longitudinal axis of the cylindrical sleeve.
7. The cutting tool of claim 1 , wherein the retainer has an unstressed diameter greater than the diameter of the bore so that when the cutting tool is inserted into the bore the retainer expands against the bore so as to be held therein.
8. A resilient retainer for rotatably mounting a rotatable cutting bit in the cylindrical bore of a block, comprising:
an elongate cylindrical sleeve being axially split along the entire length thereof, the sleeve having opposite front and rear ends, an inward engaging member extending substantially around an inner periphery thereof, wherein the inward engaging member has a constant cross sectional shape.
9. The retainer of claim 8 , wherein the inward engaging member has a generally rectangular cross sectional shape.
10. The retainer of claim 8 , wherein the inward engaging member of the cylindrical sleeve is an annular radial projection extending around the circumferential inner surface of the cylindrical sleeve.
11. The retainer of claim 8 , wherein the cylindrical sleeve and the inward engaging member of the cylindrical sleeve form a T-shape configuration along the longitudinal axis of the cylindrical sleeve.
12. A cutting tool for mounting in the bore of a block, the cutting tool, comprising:
an elongated body generally symmetrical about a longitudinal axis having forward and rearward portions, the forward portion terminating in a front end at which there is a cutting tip, the rearward portion being of a generally constant diameter and terminating in a rear end;
the rearward portion containing an annular channel adjacent the rear end;
a resilient retainer surrounding substantially the rearward portion, the retainer comprising a cylindrical sleeve being axially split along the entire length thereof, the sleeve having opposite front and rear ends, and having an inward engaging member received within the annular channel so that the elongated body and retainer are retained together; and
wherein the inward engaging member of the resilient retainer has a generally symmetrical shape about a central longitudinal axis thereof.
13. The cutting tool of claim 12 , wherein the annular channel has generally the same cross sectional shape as the inward engaging member.
14. The cutting tool of claim 12 , wherein the inward engaging member has a generally rectangular cross sectional shape.
15. The cutting tool of claim 14 , wherein the annular channel of the rearward portion of the elongated body of the cutting tool has an inward rectangular surface corresponding to the generally rectangular cross sectional shape of the inward engaging member of the cylindrical sleeve.
16. The cutting tool of claim 12 , wherein the central longitudinal axis of the inward engaging member extends generally parallel to a wall of the cylindrical sleeve.
17. A resilient retainer for rotatably mounting a rotatable cutting bit in the cylindrical bore of a block, comprising:
an elongate cylindrical sleeve being axially split along the entire length thereof, the sleeve having opposite front and rear ends, an inward engaging member extending substantially around an inner periphery thereof, wherein the inward engaging member has a generally symmetrical shape about a central longitudinal axis thereof.
18. The retainer of claim 17 , wherein the inward engaging member has a generally rectangular cross sectional shape.
19. The retainer of claim 17 , wherein the central longitudinal axis of the inward engaging member extends generally parallel to a longitudinal axis of the cylindrical sleeve.
20. The retainer of claim 17 , wherein the cylindrical sleeve and the inward engaging member of the cylindrical sleeve form a T-shape configuration along the longitudinal axis of the cylindrical sleeve.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US13/036,124 US20120049608A1 (en) | 2010-03-26 | 2011-02-28 | Retainer for rotatable cutting bit |
ZA2011/01797A ZA201101797B (en) | 2010-03-26 | 2011-03-08 | Retainer for rotatable cutting bit |
CN2011100730388A CN102200012A (en) | 2010-03-26 | 2011-03-25 | Holder for rotary cutter head |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US31771910P | 2010-03-26 | 2010-03-26 | |
US13/036,124 US20120049608A1 (en) | 2010-03-26 | 2011-02-28 | Retainer for rotatable cutting bit |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120049608A1 true US20120049608A1 (en) | 2012-03-01 |
Family
ID=45442012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/036,124 Abandoned US20120049608A1 (en) | 2010-03-26 | 2011-02-28 | Retainer for rotatable cutting bit |
Country Status (3)
Country | Link |
---|---|
US (1) | US20120049608A1 (en) |
AU (1) | AU2011200886A1 (en) |
ZA (1) | ZA201101797B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9028008B1 (en) | 2014-01-16 | 2015-05-12 | Kennametal Inc. | Cutting tool assembly including retainer sleeve with compression band |
US9702251B2 (en) | 2015-03-17 | 2017-07-11 | Kennametal Inc. | Cutting tool assembly including retainer sleeve with retention member |
USD839936S1 (en) * | 2016-05-24 | 2019-02-05 | Kennametal Inc. | Cutting insert and bolster |
US10294786B2 (en) | 2016-05-24 | 2019-05-21 | Kennametal Inc. | Rotatable cutting tool with cutting insert and bolster |
CN111655931A (en) * | 2017-12-01 | 2020-09-11 | 宝马格有限公司 | High-wear-resistance one-piece tool tip body, milling and planing tool for a ground milling machine, milling roller and ground milling machine |
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US4728153A (en) * | 1986-12-22 | 1988-03-01 | Gte Products Corporation | Cylindrical retainer for a cutting bit |
US4836614A (en) * | 1985-11-21 | 1989-06-06 | Gte Products Corporation | Retainer scheme for machine bit |
WO2003004832A1 (en) * | 2001-07-04 | 2003-01-16 | Betek Bergbau-Und Hartmetalltechnik | Fixing system for a cutting tool |
US20050082899A1 (en) * | 2001-11-12 | 2005-04-21 | Levankovsky Igor A. | Cutting tool for breaking mineral and artificial materials |
US7413257B2 (en) * | 2005-10-26 | 2008-08-19 | Kennametal Inc. | Rotatable cutting tool with reverse tapered body |
-
2011
- 2011-02-28 US US13/036,124 patent/US20120049608A1/en not_active Abandoned
- 2011-03-01 AU AU2011200886A patent/AU2011200886A1/en not_active Abandoned
- 2011-03-08 ZA ZA2011/01797A patent/ZA201101797B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4836614A (en) * | 1985-11-21 | 1989-06-06 | Gte Products Corporation | Retainer scheme for machine bit |
US4728153A (en) * | 1986-12-22 | 1988-03-01 | Gte Products Corporation | Cylindrical retainer for a cutting bit |
WO2003004832A1 (en) * | 2001-07-04 | 2003-01-16 | Betek Bergbau-Und Hartmetalltechnik | Fixing system for a cutting tool |
US20050082899A1 (en) * | 2001-11-12 | 2005-04-21 | Levankovsky Igor A. | Cutting tool for breaking mineral and artificial materials |
US7413257B2 (en) * | 2005-10-26 | 2008-08-19 | Kennametal Inc. | Rotatable cutting tool with reverse tapered body |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9028008B1 (en) | 2014-01-16 | 2015-05-12 | Kennametal Inc. | Cutting tool assembly including retainer sleeve with compression band |
US9702251B2 (en) | 2015-03-17 | 2017-07-11 | Kennametal Inc. | Cutting tool assembly including retainer sleeve with retention member |
USD839936S1 (en) * | 2016-05-24 | 2019-02-05 | Kennametal Inc. | Cutting insert and bolster |
US10294786B2 (en) | 2016-05-24 | 2019-05-21 | Kennametal Inc. | Rotatable cutting tool with cutting insert and bolster |
CN111655931A (en) * | 2017-12-01 | 2020-09-11 | 宝马格有限公司 | High-wear-resistance one-piece tool tip body, milling and planing tool for a ground milling machine, milling roller and ground milling machine |
Also Published As
Publication number | Publication date |
---|---|
AU2011200886A1 (en) | 2011-10-13 |
ZA201101797B (en) | 2011-12-28 |
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Legal Events
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---|---|---|---|
AS | Assignment |
Owner name: KENNAMETAL INC., PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RITCHEY, CARY DOUGLAS;REEL/FRAME:025981/0210 Effective date: 20110318 Owner name: KENNAMETAL INC., PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HELSEL, ERIC PAUL;REEL/FRAME:025982/0581 Effective date: 20110318 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |