Patent US3733665A successfully refreshed from Google Patents.
US3733665A
Expired / Lapsed
US
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Rotary cutting tool
Assignee: Pneumo Dynamics Corp
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Filing: 1971-02-22
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Granted: 1973-05-22
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Expires: 1991-02-22
Abstract
Abstract Rotary cutting tool has plural circumferentially spaced milled arcuate slots in the end face of the cutter body providing arcuate seats for circular blade inserts which are releasably clamped in the slots. The slots are of sufficient depth to provide adequate support for the blade inserts during the cutting operation, and the slots also provide a preset dimension for the blade inserts as determined by the depth of the slots thus permitting turning of the blade inserts within the slots to present a new cutting edge or replacement of the blade inserts without affecting the cutting diameter of the tool.
Inventors
- 👤 F Spriggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:29
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2239; B23C5/2243; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/192; Y10T407/1922; Y10T407/1924; Y10T407/1952; Y10T407/1962; Y10T407/1964
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
A rotary cutting tool comprising a tool body having an end face at one end, a plurality of circumferentially spaced arcuate slots formed directly in said tool body adjacent said end face, said arcuate slots having flat parallel spaced apart side walls, circular blade inserts received in said slots, the curvature of said slots substantially corresponding to the curvature of said circular blade inserts to provide seats for direct mating engagement by said circular blade inserts, said circular blade inserts having flat parallel sides and being of substantially the same width as said slots for supporting both sides of said inserts by the side walls of said slots, and means for retaining said circular blade inserts within said slots.
Claim 2
Dependent Claim
119 words
A rotary cutting tool comprising a tool body having an end face at one end, a plurality of circumferentially spaced arcuate slots formed directly in said tool body adjacent said end face, said arcuate slots having flat parallel spaced apart side walls, circular blade inserts received in said slots, the curvature of said slots substantially corresponding to the curvature of said circular blade inserts to provide seats for direct mating engagement by said circular blade inserts, said circular blade inserts having flat parallel sides and being of substantially the same width as said slots for supporting both sides of said inserts by the side walls of said slots, and means for retaining said circular blade inserts within said slots.
Claim 3
Dependent Claim
43 words
The tool of claim 1 wherein both side walls of said slots extend to a depth greater than half the diameter of said circular blade inserts for supporting more than one half of both sides of saId circular blade inserts within said slots.
Claim 4
Dependent Claim
23 words
The tool of claim 2 wherein said slots extend approximately 180* within said tool body for increased support of said circular blade inserts.
Claim 5
Dependent Claim
36 words
The tool of claim 1 wherein the depth of said slots is such that only a small portion of said circular blade inserts projects outwardly beyond the outer periphery and front face of said tool body.
Claim 6
Dependent Claim
33 words
The tool of claim 1 wherein said slots are disposed at an angle to the longitudinal axis of said tool body to provide the desired rake and relief for said circular blade inserts.
Claim 7
Dependent Claim
37 words
The tool of claim 1 wherein there are an odd number of said slots with said circular blade inserts therein uniformly spaced around the periphery of said tool body to reduce vibrations of said tool during use.
Claim 8
Dependent Claim
69 words
The tool of claim 1 wherein said means for retaining said circular blade inserts within said slots comprises wedge clamps fastened to said tool body engaging one side of said circular blade inserts adjacent one side wall of said slots, said one side wall being relieved to expose less than one half of said one side of said inserts for engagement of said one side by said wedge clamps.
Claim 9
Dependent Claim
40 words
The tool of claim 7 further comprising semi-annular passages extending sideways along the face of the relieved portions of said one side wall from the outer periphery of said tool body in line with the axial center of said slots.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |