US3875631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inserts for metal cutters
Assignee: Individual
•
Filing: 1974-02-28
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Granted: 1975-04-08
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Expires: 1994-02-28
Abstract
Abstract A set of inserts for a cutter is disclosed herein. Each insert in the set is polygonal in shape and has three or more identical sides of equal length and two parallel faces generally perpendicular to the sides. The sides have symmetrical, equally spaced serrations having a cutting crest and cutting flanks formed in them. Each insert can be indexed in the cutter by rotating it in its seat to expose another of the sides for cutting. When the insert is made with the faces perpendicular to the sides, as in a negative insert, the inserts may be flipped over to present cutting edges on the opposite face. The center lines of the serrations on each insert are offset from the center line of the insert a distance equal to (2n - K)/(2N)P, where P is the distance between the center line of adjacent serrations, N is the number of inserts in the set, and n is the position of the insert in the set, and K is 1 when N is even and 2 when N is odd.
Inventors
- 👤 Paul Malinchak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:08
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/202; B23C2200/00; B23C2200/12; B23C2200/125; B23C2200/20; B23C2200/206; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1952; Y10T407/1962; Y10T407/23; Y10T407/235
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
225 words
A set of a plurality of inserts made up of a set of a number N of inserts to be mounted in a cutter and adapted to each cut an equal amount from a work piece, said inserts each having the shape of a regular polygon having a plurality of identical sides of equal length and two flat faces generally parallel to each other and perpendicular to said sides form a cutting edge at said face-side wall intersections, a plurality of equally spaced identical serrations formed in each said side of said insert and having their center lines spaced from each other a distance P, each said serration having a cutting crest and two angularly disposed cutting flanks, the distance S of the center line of any insert from the center line of the serration on that insert nearest one side of said center line of the insert is equal to (2n - K/2N) P, where N is the number of inserts in the set, n is the numeral position of a given crest in a series of crests each being on an insert of a set of inserts, the initial crest of the series being on or adjacent to the center line of the insert, K is equal to one, where N is even, and K is equal to two, where N is odd.
Claim 2
Dependent Claim
225 words
A set of a plurality of inserts made up of a set of a number N of inserts to be mounted in a cutter and adapted to each cut an equal amount from a work piece, said inserts each having the shape of a regular polygon having a plurality of identical sides of equal length and two flat faces generally parallel to each other and perpendicular to said sides form a cutting edge at said face-side wall intersections, a plurality of equally spaced identical serrations formed in each said side of said insert and having their center lines spaced from each other a distance P, each said serration having a cutting crest and two angularly disposed cutting flanks, the distance S of the center line of any insert from the center line of the serration on that insert nearest one side of said center line of the insert is equal to (2n - K/2N) P, where N is the number of inserts in the set, n is the numeral position of a given crest in a series of crests each being on an insert of a set of inserts, the initial crest of the series being on or adjacent to the center line of the insert, K is equal to one, where N is even, and K is equal to two, where N is odd.
Claim 3
Dependent Claim
28 words
The inserts recited in claim 1 wherein at least two of said adjacent inserts have serrations that are asymmetrical with respect to the center line of said insert.
Claim 4
Dependent Claim
30 words
The inserts recited in claim 2 wherein another said insert on said set comprises serrations that are symmetrical with respect to the center line of said sides of said inserts.
Claim 5
Dependent Claim
16 words
The inserts recited in claim 3 wherein at least two inserts in said set are identical.
Claim 6
Dependent Claim
61 words
The inserts recited in claim 1 wherein said set of inserts comprises four inserts and two of said inserts each have crests spaced from the center line of each of its sides by an amount of P/8 and the other two of said inserts each have a crest spaced from the center line of each side by an amount of P/4.
Claim 7
Dependent Claim
84 words
The inserts recited in claim 1 wherein said set of inserts comprises five said inserts and one of said inserts has a serration on the center line of each of its sides, two of the other said inserts each having a serration spaced from the center line of each side by an amount of P/5 and the other two of said inserts having a serration nearer the center line of each of its sides spaced from said center line by an amount of P/5.
Claim 8
Dependent Claim
24 words
The set of inserts recited in claim 1 wherein said sets of inserts includes at least two inserts that are identical to each other.
Claim 9
Dependent Claim
32 words
The set of inserts recited in claim 7 wherein said set of inserts includes one insert that has its center crest on each side disposed on the center line of that side.
Claim 10
Dependent Claim
25 words
The set of inserts recited in claim 7 wherein one said insert that is identical to the other is flipped over relative to the other.
Claim 11
Dependent Claim
33 words
The set of inserts recited in claim 1 wherein said set of inserts includes at least six inserts and three of said inserts are each identical respectively to one of the other three.
Claim 12
Dependent Claim
34 words
The set of inserts recited in claim 1 wherein said set of inserts includes at least five inserts and two said inserts are each identical respectively to one of the two other said inserts.
Claim 13
Dependent Claim
25 words
The set of inserts recited in claim 1 wherein said set of inserts includes at least three inserts and two of said inserts are identical.
Claim 14
Dependent Claim
31 words
The set of inserts recited in claim 1 wherein said set of inserts includes at least eight inserts and four said inserts are each identical respectively to four other said inserts.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |