US3894322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holder with interchangeable cutting inserts for machine tools
Assignee: Iscar Ltd
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Filing: 1974-11-25
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Granted: 1975-07-15
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Expires: 1994-11-25
Abstract
Abstract The holder has a recess at its cutting end, with a longitudinal slot extending rearwardly from the back of the recess to provide jaws, with a vertical bolt through the jaws to clamp the jaws against upper and lower end edges of a cutting insert received in said recess. Upper and lower opposed parallel, longitudinal edges of the recess are concavely shaped transversely, to slidably receive complementary transversely shaped parallel, longitudinal surfaces of the insert to prevent side movements or tilt of the insert in the tool holder. Once the insert is clamped in the tool holder, it will remain tightly clamped thereon even with substantial loads on the cutter insert and considerable vibrations. A high degree of accuracy will repeatedly occur in location of the cutter element in the tool holder. Additional advantage in clamping accuracy is provided if the cutting insert and matching nesting recess are made with concave-convex complementary sliding surfaces at the back ends of the recess and insert, as well as at the top and bottom.
Inventors
- 👤 Joseph Pano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:21
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/007; B23B27/04; B23B27/045; B23B27/06; B23B2205/00; B23B2205/02; B23B2260/00; B23B2260/124; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/2272; Y10T407/2282; Y10T407/2286; Y10T407/2288; Y10T407/25; Y10T407/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
301 words
A machine tool comprising a holder for a cutter insert, said holder comprising an elongated one piece bar having a forward end and a rear end, said bar being formed at its front end with a recess having opposite ends and being open at one end, and with a slot extending rearwardly of said recess, said slot having a closed rear end, said slot and recess forming upper and lower jaws at the front end of the bar inseparably and integrally formed with the bar, said slot being located at a level between the upper and lower edges of said recess, means located between said recess and the rear end of the slot, to press said jaws relatively together, said recess forming elongated parallel opposed edges on said jaws, a one piece cutter insert within said recess and adapted to be clamped to said holder by said press means, said insert having parallel edges slidably engaging said edges of said jaws at said recess, said edges of said jaws and insert comprising mating rail and track interengaging slidably contacting means to prevent side to side movement of said insert in a direction perpendicular to said insert, said insert having means at one end thereof to abut the other end of said recess, said bar having a vertical thinned integral wall at its forward end, said thinned wall being formed with said recess, and said insert being disposed in the plane of said thinned wall, said bar being thickened rearwardly of said thinned wall, said means to press said jaws together comprising a bolt in openings formed in said thickened portion of said bar rearwardly of said thinned wall, said bolt having an axis offset from the insert, whereby the insert and the clamping force of the bolt are in opposing planes.
Claim 2
Dependent Claim
301 words
A machine tool comprising a holder for a cutter insert, said holder comprising an elongated one piece bar having a forward end and a rear end, said bar being formed at its front end with a recess having opposite ends and being open at one end, and with a slot extending rearwardly of said recess, said slot having a closed rear end, said slot and recess forming upper and lower jaws at the front end of the bar inseparably and integrally formed with the bar, said slot being located at a level between the upper and lower edges of said recess, means located between said recess and the rear end of the slot, to press said jaws relatively together, said recess forming elongated parallel opposed edges on said jaws, a one piece cutter insert within said recess and adapted to be clamped to said holder by said press means, said insert having parallel edges slidably engaging said edges of said jaws at said recess, said edges of said jaws and insert comprising mating rail and track interengaging slidably contacting means to prevent side to side movement of said insert in a direction perpendicular to said insert, said insert having means at one end thereof to abut the other end of said recess, said bar having a vertical thinned integral wall at its forward end, said thinned wall being formed with said recess, and said insert being disposed in the plane of said thinned wall, said bar being thickened rearwardly of said thinned wall, said means to press said jaws together comprising a bolt in openings formed in said thickened portion of said bar rearwardly of said thinned wall, said bolt having an axis offset from the insert, whereby the insert and the clamping force of the bolt are in opposing planes.
Claim 3
Dependent Claim
18 words
The combination of claim 1, the back end of said recess and insert comprising edges having matching interengagement.
Claim 4
Dependent Claim
63 words
The combination of claim 1, said rail and track means of said jaws and insert comprising converging surfaces on the edges of said jaws with grooves at the apeces of said converging surfaces, and converging surfaces on the edges of said insert contacting the converging surfaces of said edges of said recess, and ribs received in the apex grooves between said converging surfaces.
Claim 5
Dependent Claim
25 words
The combination of claim 1, said insert having a portion formed with parallel, opposite surfaces, and an outwardly flaring portion formed with a cutting edge.
Claim 6
Dependent Claim
15 words
The combination of claim 1, said edges of said recess being inclined forwardly and upwardly.
Claim 7
Dependent Claim
50 words
The combination of claim 1, said recess having a semicircular back end between the rear ends of said parallel edges of said recess, said semi-circular back end having transverse grooves, and said insert having a back semi-circular edge having means to engage with the semi-circular back end of said recess.
Claim 8
Dependent Claim
32 words
The combination of claim 1, said cutter insert having a cutting edge located forwardly of the bar and above the level of said slot and below the upper surface of the bar.
Claim 9
Dependent Claim
21 words
The combination of claim 1, said insert being slidable rearwardly into said recess through the front open end of said recess.
Claim 10
Dependent Claim
13 words
The combination of claim 1, said insert being disposed in a vertical plane.
Claim 11
Dependent Claim
21 words
The Combination of claim 1, said recess being in a plane perpendicular to said slot and extending longitudinally of said bar.
References Cited (Backward Citations)
US1144131A
Cited
US1843549A
Cited
US3066385A
Cited
US3205557A
Cited
US3557417A
Cited
US3455001A
Cited
US3599303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |