Patent US3579777A successfully refreshed from Google Patents.
US3579777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical end mill
Assignee: Valenite LLC
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Filing: 1969-03-10
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Granted: 1971-05-25
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Expires: 1989-03-10
Abstract
Abstract A cutting tool with helical slots for replaceable helix blades that fit the slots, a common kerf or slit between the blade slots which follows their helix angle and provides a bifurcated shank with opposite sides of each slot wall on opposite shank parts, and a cross screw for drawing the shank parts together to close the blade slots and hold the helix blades in the slots for metal cutting use.
Inventors
- 👤 Vistor Milewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2298; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/191
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A cutting tool, comprising; a shank having a cutting blade receptive slot and next adjacent chip recess formed at a helix angle in the outer periphery thereof, said shank being axially slit through the base of the slot on a like helix angle for diSposing opposite sidewalls of the slot on opposite sides of the slit, and means through the shank and intersecting the slit for closing the slit and drawing the slot sidewalls into clamping engagement with a cutting blade received in the blade receptive slot.
Claim 2
Dependent Claim
87 words
A cutting tool, comprising; a shank having a cutting blade receptive slot and next adjacent chip recess formed at a helix angle in the outer periphery thereof, said shank being axially slit through the base of the slot on a like helix angle for diSposing opposite sidewalls of the slot on opposite sides of the slit, and means through the shank and intersecting the slit for closing the slit and drawing the slot sidewalls into clamping engagement with a cutting blade received in the blade receptive slot.
Claim 3
Dependent Claim
51 words
The cutting tool of claim 1 wherein, said shank includes a pair of slots and ship recesses with said slit extending through the base of both slots, and said slit closing means is disposed for drawing opposite sidewalls of both of the slots into clamping engagement with cutting blades received therein.
Claim 4
Dependent Claim
27 words
The cutting tool of claim 2 wherein, said slots are oppositely disposed on said shank and said slit extends therebetween through the axial centerline of the shank.
Claim 5
Dependent Claim
29 words
The cutting tool of claim 3 wherein, said shank is slit axially on a straight radial line and at a like helix angle through the base of said slots.
Claim 6
Dependent Claim
24 words
The cutting tool of claim 1, said slit closing means including a threaded fastener and locking means disposed for engagement with said threaded fastener.
Claim 7
Dependent Claim
89 words
A cutting tool comprising; a shank having a pair of cutting blade receptive slots formed at helix angles in the periphery and on opposite sides thereof, a common opening provided between said slots extending at a like helix angle through the base of each and throughout their full length for disposing opposite sidewalls of each slot on separated parts of the shank, and means for drawing the parts of the shank separated by said opening together for closing the slot sidewalls into clamping engagement with cutting blades received therein.
Claim 8
Dependent Claim
89 words
A cutting tool comprising; a shank having a pair of cutting blade receptive slots formed at helix angles in the periphery and on opposite sides thereof, a common opening provided between said slots extending at a like helix angle through the base of each and throughout their full length for disposing opposite sidewalls of each slot on separated parts of the shank, and means for drawing the parts of the shank separated by said opening together for closing the slot sidewalls into clamping engagement with cutting blades received therein.
Claim 9
Dependent Claim
118 words
A helical end mill, comprising; a shank rotatable about an axial centerline and having cutting blade receptive slots and next adjacent chip recesses formed in the outer periphery thereof on opposite sides and at like helix angles extending from the blade receptive end thereof, said shank being slit at its blade receptive end to provide a separation through the base of each of said slots extending at like helix angles and for disposing opposite sidewalls of each slot on opposite parts of the shank, and threaded fastener means extending between the parts of the shank for closing the base separation in said slots and drawing opposite sidewalls of said slots into clamping engagement with cutting blades disposed therein.
Claim 10
Dependent Claim
118 words
A helical end mill, comprising; a shank rotatable about an axial centerline and having cutting blade receptive slots and next adjacent chip recesses formed in the outer periphery thereof on opposite sides and at like helix angles extending from the blade receptive end thereof, said shank being slit at its blade receptive end to provide a separation through the base of each of said slots extending at like helix angles and for disposing opposite sidewalls of each slot on opposite parts of the shank, and threaded fastener means extending between the parts of the shank for closing the base separation in said slots and drawing opposite sidewalls of said slots into clamping engagement with cutting blades disposed therein.
Claim 11
Dependent Claim
50 words
The helical end mill of claim 7 wherein, said fastener means has shoulder stop engagement with one part of the shank and threaded engagement with the other part, and a setscrew through the terminal end of the shank for engaging and locking the threaded fastener means in its blade-clamping position.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |