US3821837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting insert and cutting tool
Assignee: Santrade Ltd
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Filing: 1973-07-05
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Granted: 1974-07-02
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Expires: 1993-07-05
Abstract
Abstract In a chip-forming cutting tool, the novel insert is provided, at one base surface (at a distance from the cutting corner at each primary bevel face) with a recess for receiving a clamping element. Each pair of bevel faces are separated from each other by a second pair of bevel faces each of which intersects with an associated side surface at an edge of less than 90*. This edge defines a back cutting edge.
Inventors
- 👤 K Faber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:46
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2239; B23B; B23B27/00; B23B27/14; B23B27/16; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/192; Y10T407/1924; Y10T407/1934; Y10T407/1938; Y10T407/194; Y10T407/22; Y10T407/2272; Y10T407/2282; Y10T407/2286; Y10T407/2292; Y10T407/23; Y10T407/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
217 words
An insert adapted to be supported on a bottom surface in an insert-receiving site in a cutter body, while being located against side supports in said site, said insert comprising a prismatic bar of cutting material having mutually parallel side surfaces and base surfaces at both of its ends, the cross-section of which bar is in the shape of a parallelogram and the side surfaces intersect to define longitudinally extending main cutting edges, at least one of said base surfaces having a pair of primary bevel faces extending in planes each of which intersects with planes through two of said side surfaces at angles of more than 90* and with another side surface at an angle of less than 90*, said last junction defining an edge which meets with an associated main cutting edge into a cutting tip while defining a finish cutting edge to cooperate with said main cutting edge, each of said primary bevel faces being provided with a recess at a distance from said cutting tip to receive a clamping element, said pair of primary bevel faces being separated from each other by a pair of secondary bevel faces each of which latter intersects with an associated side surface at an edge of less than 90*, said last edge defining a back cutting edge.
Claim 2
Dependent Claim
217 words
An insert adapted to be supported on a bottom surface in an insert-receiving site in a cutter body, while being located against side supports in said site, said insert comprising a prismatic bar of cutting material having mutually parallel side surfaces and base surfaces at both of its ends, the cross-section of which bar is in the shape of a parallelogram and the side surfaces intersect to define longitudinally extending main cutting edges, at least one of said base surfaces having a pair of primary bevel faces extending in planes each of which intersects with planes through two of said side surfaces at angles of more than 90* and with another side surface at an angle of less than 90*, said last junction defining an edge which meets with an associated main cutting edge into a cutting tip while defining a finish cutting edge to cooperate with said main cutting edge, each of said primary bevel faces being provided with a recess at a distance from said cutting tip to receive a clamping element, said pair of primary bevel faces being separated from each other by a pair of secondary bevel faces each of which latter intersects with an associated side surface at an edge of less than 90*, said last edge defining a back cutting edge.
Claim 3
Dependent Claim
97 words
A cutting insert as defined in claim 1, in which the insert is of perpendicularly parallelepipedic shape having a rectangular or square cross section, the side surfaces whereof intersect to define four main cutting edges and each base surface at the bar end having a pair of primary bevel faces each intersecting with a side surface to define a finish cutting edge for cooperation with an associated main cutting edge, said pair of primary bevel faces being separated by a pair of secondary bevel faces each intersecting with a side surface to define a back cutting edge.
Claim 4
Dependent Claim
31 words
A cutting insert as defined in claim 1 in which each of said secondary bevel faces intersects with an adjacent primary bevel face at an edge of more than 120 degrees.
Claim 5
Dependent Claim
30 words
A cutting insert as defined in claim 1 in which said recesses adapted for the reception of clamping elements are provided in diagonally opposed inactive corners at the base surface.
Claim 6
Dependent Claim
19 words
A cutting insert as defined in claim 4 in which the recesses are V-formed each comprising two triangular surfaces.
Claim 7
Dependent Claim
34 words
A cutting insert as defined in claim 4 in which that surface of said recess intended for engagement with a clamping element intersects with an associated side surface at an edge of about 90*.
Claim 8
Dependent Claim
35 words
A cutting insert as defined in claim 4 in which that surface of said recess intended for engagement with a clamping element intersects with an associated side surface at an edge of less than 90*.
Claim 9
Dependent Claim
131 words
A cutter comprising a body having at least one pocket defining an insert site, an insert in the form of a prismatic bar as defined in claim 1 resting in said site against complementary support surfaces therein comprising a bottom support surface and side supports upstanding therefrom, in said cutter body a spring device comprising a spring-loaded pull rod provided at the end thereof with a hook is disposed to engage with said recess formed in one bar end so as to urge the insert into said pocket with a diagonally opposed bevel surface at the opposed bar end in abutting relationship with a correspondingly inclined support surface in said site, thus enabling clamping the insert into itS site under the action of two clamping forces acting in substantially opposed directions.
Claim 10
Dependent Claim
159 words
A cutter as defined in claim 8 comprising a cutter body having a plurality of recesses spaced about the circumference of said cutter body, each recess defining an insert-receiving site, each said recess having a bottom support surface and side support surfaces upstanding therefrom; a plurality of cutting inserts each as defined in claim 1 positioned in said recess in contact with said complementary support surfaces, in said cutter body a spring-loaded pull rod arranged to move substantially parallel with the axis of rotation of said cutter body so that at a spring actuation of the rod the hook provided thereon engages with said recess provided in said base surface thus urging the insert with a bevel face at the opposed base surface to engage with a corresponding inwardly inclined support surface in said site, said inclined support surface being inclined at an angle of less than 90* with respect to said bottom support surface in said insert-receiving site.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |