Patent US3880545A successfully refreshed from Google Patents.
US3880545A
Expired / Lapsed
US
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Fine-boring tool
Assignee: Mapal Fabrik fuer Praezisionswerkzeuge Dr Kress KG
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Filing: 1973-11-15
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Granted: 1975-04-29
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Expires: 1993-11-15
Abstract
Abstract A fine-boring tool in which a cutting blade is radially adjustable in an axial groove of the tool head, and guide rails axially elongated project radially from the tool head so that outer faces of the guide rails and a front portion of the cutting edge of the blade are located in a cylindrical surface about the axis of tool rotation while the rear portion of the blade projects radially beyond the afore-mentioned edge portion.
Inventors
- 👤 Dieter Kress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:01
CPC Classifications
B; B23; B23D; B23D77/00; B23D77/02; B23D77/04; B23D77/044; B23D2277/00; B23D2277/46; Y; Y10; Y10T; Y10T408/00; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8598; Y10T408/85995; Y10T408/89; Y10T408/905; Y10T408/906
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
175 words
A boring tool comprising: a. a tool head having an axis and a surface circumferentially extending about said axis, 1. said surface being formed with a groove open in a direction radial relative to said axis and elongated in the direction of said axis; b. a cutter blade received in said groove and projecting radially from said groove, 1. said blade having a cutting edge elongated in the direction of said axis, said cutting edge having two longitudinal portions; c. adjusting means for adjusting the effective depth of said groove and for thereby adjusting the distance over which said blade projects from said groove; and d. a plurality of guide means circumferentially spaced on said surface from each other and from said groove, 1. each guide means including a guide member having an outer, convex guide face elongated in the direction of said axis, 2. said guide faces and one of said longitudinal portions defining a cylinder about said axis, 3. the other longitudinal portion of said cutting edge being offset radially from said cylinder.
Claim 2
Dependent Claim
175 words
A boring tool comprising: a. a tool head having an axis and a surface circumferentially extending about said axis, 1. said surface being formed with a groove open in a direction radial relative to said axis and elongated in the direction of said axis; b. a cutter blade received in said groove and projecting radially from said groove, 1. said blade having a cutting edge elongated in the direction of said axis, said cutting edge having two longitudinal portions; c. adjusting means for adjusting the effective depth of said groove and for thereby adjusting the distance over which said blade projects from said groove; and d. a plurality of guide means circumferentially spaced on said surface from each other and from said groove, 1. each guide means including a guide member having an outer, convex guide face elongated in the direction of said axis, 2. said guide faces and one of said longitudinal portions defining a cylinder about said axis, 3. the other longitudinal portion of said cutting edge being offset radially from said cylinder.
Claim 3
Dependent Claim
15 words
said guide faces and one of said longitudinal portions defining a cylinder about said axis,
Claim 4
Dependent Claim
15 words
said guide faces and one of said longitudinal portions defining a cylinder about said axis,
Claim 5
Dependent Claim
22 words
A tool as set forth in claim 1, wherein said guide faces and said one portion constitute respective parts of said cylinder.
Claim 6
Dependent Claim
45 words
A tool as set forth in claim 1, further comprising a shaft coaxially projecting from said head in one axial direction, said one portion of said cutting head being offset from said other portion thereof in an axial direction opposite to said one axial direction.
Claim 7
Dependent Claim
14 words
the other longitudinal portion of said cutting edge being offset radially from said cylinder.
Claim 8
Dependent Claim
14 words
the other longitudinal portion of said cutting edge being offset radially from said cylinder.
Claim 9
Dependent Claim
26 words
A tool as set forth in claim 1, wherein said one portion of said cutting edge and said guide faces are axially at least partly coextensive.
Claim 10
Dependent Claim
19 words
A tool as set forth in claim 1, further comprising fastening means releasably fastening said blade in said groove.
Claim 11
Dependent Claim
56 words
A tool as set forth in claim 5, said head having an axially extending bottom wall in said groove, and said adjusting means including at least one abutment member movable on said head between a plurality of positions in which said abutment member terminates at different respective radial distances from said bottom wall in said groove.
Claim 12
Dependent Claim
23 words
A tool as set forth in claim 1, wherein said other longitudinal portion is offset from said cylinder in a radially outward direction.
References Cited (Backward Citations)
US3490315A
Cited
US3598499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |