Patent US4283820A successfully refreshed from Google Patents.
US4283820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segment-shaped blade
Assignee: Miba Sintermetall GmbH
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Filing: 1979-11-14
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Granted: 1981-08-18
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Expires: 1999-11-14
Abstract
Abstract A segment-shaped blade is provided for use in a rotatable cylindrical tool for machining elastic material, particularly pneumatic rubber tires for vehicles. The blade comprises pointed triangular teeth, which are provided on a convex periphery and are staggered and divided by radial cuts. Each radial cut extends only as far as to the root of the tooth concerned and each triangular tooth is divided by one or more radial cuts into at least two triangular prongs which have pointed tips that are much more slender than the pointed tip of the original tooth.
Inventors
- 👤 Karl Willinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:12
CPC Classifications
B; B23; B23D; B23D71/00; B23D71/02; B23D71/025; Y; Y10; Y10T; Y10T407/00; Y10T407/18; Y10T407/181
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
A segment-shaped blade for use in a cylindrical tool for machining elastic material by rotating the tool in a direction of rotation, the blade extending in a plane and having a convex periphery extending in a curved plane perpendicular to the plane of the blade, which comprises a plurality of triangular teeth arranged along the periphery between peripheral recesses, each triangular tooth having a root in another curved plane inwardly spaced from, and substantially parallel to, the curved plane wherein the periphery of the blade extends, and each tooth being divided by a substantially radial cut extending no farther than the root of the tooth into prongs having pointed tips, at least alternating ones of the prongs being bent to a side of the plane of the blade and the pointed tips of all prongs lying in the curved plane wherein the periphery of the blade extends and laterally staggered from each other in relation to the plane of the blade.
Claim 2
Dependent Claim
161 words
A segment-shaped blade for use in a cylindrical tool for machining elastic material by rotating the tool in a direction of rotation, the blade extending in a plane and having a convex periphery extending in a curved plane perpendicular to the plane of the blade, which comprises a plurality of triangular teeth arranged along the periphery between peripheral recesses, each triangular tooth having a root in another curved plane inwardly spaced from, and substantially parallel to, the curved plane wherein the periphery of the blade extends, and each tooth being divided by a substantially radial cut extending no farther than the root of the tooth into prongs having pointed tips, at least alternating ones of the prongs being bent to a side of the plane of the blade and the pointed tips of all prongs lying in the curved plane wherein the periphery of the blade extends and laterally staggered from each other in relation to the plane of the blade.
Claim 3
Dependent Claim
21 words
The segment-shaped blade of claim 1, wherein the alternating prongs are bent to different sides of the plane of the blade.
Claim 4
Dependent Claim
43 words
The segment-shaped blade of claim 1 or 2, wherein each tooth is divided by a single one of the cuts into two of said prongs, the triangular tooth having a plane of symmetry and the single cut extending in the plane of symmetry.
Claim 5
Dependent Claim
82 words
The segment-shaped blade of claim 1 or 2, wherein the teeth have a plane of symmetry and a like number of said cuts at each side of the plane of symmetry divide each tooth into a plurality of said prongs, the prongs having different heights and longers ones of the prongs being offset to a side of the plane of the blade so that the pointed tips of all prongs lie in the curved plane wherein the periphery of the blade extends.
References Cited (Backward Citations)
US2896309A
Cited
US2975504A
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US3102325A
Cited
US3351997A
Cited
US3680185A
Cited
GB1300102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |