US3754309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting insert and clamping arrangement therefor
Assignee: Kennametal Inc
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Filing: 1972-01-28
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Granted: 1973-08-28
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Expires: 1992-01-28
Abstract
Abstract The specification discloses a cutting insert which is invertable and which has a diagonal notch in each of the top and bottom sides thereof which is engaged by a clamp element which presses the insert downwardly into a pocket provided therefor in a holder while simultaneously drawing the insert against the sides of the pocket.
Inventors
- 👤 D Jones
- 👤 G Barkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:59
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/14; B23B27/16; B23B27/1625; B23B27/164; B23B27/007; B23B27/06; B23B27/065; B23B2200/00; B23B2200/08; B23B2200/086; B23B2200/088; B23B2260/00; B23B2260/03; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/2222; Y10T407/2272; Y10T407/2282; Y10T407/23
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
328 words
In a cutting tool: holder means having an insert pocket formed therein which has one end wall means and one side wall means and a bottom wall means and is open on the said other three sides, said holder means having a longitudinal mounting axis, a hard insert receivable in said pocket and having end regions and parallel sides and parallel top and bottom walls perpendicular to said sides, said insert when seated in said pocket having one of said top and bottom walls resting on said bottom wall means and one side engaging said side wall means and one end region engaging the said end wall means, said insert being invertable in said pocket about an axis perpendicular to the said sides thereof, said insert having cutting regions at the junctures of said top and bottom walls and respective ones of said end regions and when seated in said pocket projecting from the open end thereof to expose the one of said cutting regions which is then uppermost in said pocket, each said end region being inclined to form an acute included angle with that one of said top and bottom walls with which the respective end region forms a cutting region, means forming a diagonal notch in each of said top and bottom walls so inclined that each notch when uppermost forms an acute angle with said side wall means on the side of the notch which is nearest said end wall means, a recess in said holder means spaced from said uppermost notch in a direction substantially perpendicular to the length of thenotch, a clamp element having a pair of dependent legs with the extremity of one of said legs in each of aid notch and recess, and means on said holder means engaging said clamp element and adjustable for urging said clamp element toward said holder means for pressing said legs into said notch and recess for fixedly clamping said insert in said pocket.
Claim 2
Dependent Claim
328 words
In a cutting tool: holder means having an insert pocket formed therein which has one end wall means and one side wall means and a bottom wall means and is open on the said other three sides, said holder means having a longitudinal mounting axis, a hard insert receivable in said pocket and having end regions and parallel sides and parallel top and bottom walls perpendicular to said sides, said insert when seated in said pocket having one of said top and bottom walls resting on said bottom wall means and one side engaging said side wall means and one end region engaging the said end wall means, said insert being invertable in said pocket about an axis perpendicular to the said sides thereof, said insert having cutting regions at the junctures of said top and bottom walls and respective ones of said end regions and when seated in said pocket projecting from the open end thereof to expose the one of said cutting regions which is then uppermost in said pocket, each said end region being inclined to form an acute included angle with that one of said top and bottom walls with which the respective end region forms a cutting region, means forming a diagonal notch in each of said top and bottom walls so inclined that each notch when uppermost forms an acute angle with said side wall means on the side of the notch which is nearest said end wall means, a recess in said holder means spaced from said uppermost notch in a direction substantially perpendicular to the length of thenotch, a clamp element having a pair of dependent legs with the extremity of one of said legs in each of aid notch and recess, and means on said holder means engaging said clamp element and adjustable for urging said clamp element toward said holder means for pressing said legs into said notch and recess for fixedly clamping said insert in said pocket.
Claim 3
Dependent Claim
79 words
A cutting tool according to claim 1 in which at least one of the sides of said uppermost notch and said recess nearest each other and the sides of said legs in engagement therewith are convergent upwardly whereby pressing of said legs into said uppermost notch and recess will draw said insert firmly against said side wall means and end wall means of said pocket while simultaneously clamping the insert solidly against said bottom wall means of the pocket.
Claim 4
Dependent Claim
106 words
A cutting tool according to claim 1 in which said holder means has an end portion and oppositely facing side portions adjacent to said end portion, said pocket being formed in one of said end and side portions, said bottom wall means of said pocket being disposed in a plane substantially parallel to said longitudinal mounting axis, said side wall means of said pocket being disposed in a plane which is perpendicular to the plane of said bottom wall means and which diverges from said longitudinal mounting axis toward the open end of said pocket at an acute included angle of about 3* to about 5*.
Claim 5
Dependent Claim
115 words
A cutting tool according to claim 1 in which said holder means has an end portion and oppositely facing side portions adjacent to said end portion, said pocket being formed in one of said end and side portions, said bottom wall means of said pocket being disposed in a plane substantially parallel to saidlongitudinal mounting axis, said side wall means of said pocket being disposed in a plane which is perpendicular to the plane of said bottom wall means and which diverges from a plane perpendicular to said longitudinal mounting axis in a direction toward the open end of said pocket at an included angle on the order of from about 3* to about 5*.
Claim 6
Dependent Claim
99 words
A cutting tool according to claim 3 in which said holder means comprises a radial flange adjacent said side and end portions and a cylindrical axial shank upstanding from the center of said flange on the side thereof opposite said end portion, the axis of said shank being parallel to said longitudinal mounting axis, said cylindrical shank being receivable in a bore in a support member, means for locating said holder means on said support memberangularly with respect to the axis of said cylindricalshank, and means for fixedly clamping said flange of said holder means to said support member.
Claim 7
Dependent Claim
54 words
A cutting tool according to claim 1 in which each cutting region when viewed in plan is symmetrical about an axis of symmetry extending generally longitudinally of the insert and parallel to the longitudinal mounting axis of said holder means when the insert is seated in said pocket with the respective cutting region uppermost.
Claim 8
Dependent Claim
167 words
A cutting insert having end wall regions and parallel sides and parallel top and bottom walls perpendicular to said sides and adapted for mounting in a pocket in a holder with one end region exposed, said insert being invertable about an axis perpendicular to the said sides thereof, said insert having cutting edges at the junctures of said top and bottom walls and respective ones of said end wall regions, whereby in each inverted position of the insert a respective cutting edge is presented uppermost at the same end of the insert, and a diagonal notch formed in each of said top and bottom walls of the insert and extending thereacross at an angle such that each notch when uppermost forms substantially the same acute angle with said sides of the insert, each end wall region of said insert forming an included angle of less than 90* with the one of said top and bottom walls with which the respective end wall region forms a cutting edge.
Claim 9
Dependent Claim
167 words
A cutting insert having end wall regions and parallel sides and parallel top and bottom walls perpendicular to said sides and adapted for mounting in a pocket in a holder with one end region exposed, said insert being invertable about an axis perpendicular to the said sides thereof, said insert having cutting edges at the junctures of said top and bottom walls and respective ones of said end wall regions, whereby in each inverted position of the insert a respective cutting edge is presented uppermost at the same end of the insert, and a diagonal notch formed in each of said top and bottom walls of the insert and extending thereacross at an angle such that each notch when uppermost forms substantially the same acute angle with said sides of the insert, each end wall region of said insert forming an included angle of less than 90* with the one of said top and bottom walls with which the respective end wall region forms a cutting edge.
Claim 10
Dependent Claim
19 words
A cutting insert according to claim 7 in which each said notch is substantially ''''V'''' shaped in cross section.
Claim 11
Dependent Claim
110 words
A cutting insert according to claim 7 in which each said end wall region when viewed from the side of the insert comprises two portions in end to end relation at an angle to each other and to said top and bottom walls, the said portion adjacent the cutting edge pertaining to the respective end wall region forming an included acute angle on the order of from about 75* to 85* with the adjacent one of said top and bottom walls and the other said portion forming an acute angle on the order of from about 50* to 60* with the same said one of said top and bottom walls.
Claim 12
Dependent Claim
64 words
A cutting insert according to claim 7 in which each cutting edge when viewed in plan is symmetrical about a respective axis of symmetry extending substantially longitudinally of the insert and making the same small angle with a plane parallel to the sides of the insert, said axes of symmetry being convergent toward one side of said insert and divergent toward the other thereof.
Claim 13
Dependent Claim
25 words
A cutting insert according to claim 10 in which the smaller included angle between said axes of symmetry is on the order of about 6*.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |