Patent US3798724A successfully refreshed from Google Patents.
US3798724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking arrangement for cutting blade inserts
Assignee: GORHAM TOOL CO
•
Filing: 1972-07-28
•
Granted: 1974-03-26
•
Expires: 1992-07-28
Abstract
Abstract An arrangement for locking a cutter blade insert on a milling cutter body. A bore in the cutter body adjacent a recess into which a cutting blade is inserted has a portion of its side wall intercepting the recess. A cam lock is mounted for rotation within the bore by journalling the reduced cylindrical end shafts thereof within the bore. The cam lock has a cam intermediate the shaft ends which is disposed within the bore adjacent the intersection of the bore and the recess. When the cam is actuated to a locking position after a blade is inserted into the recess, it wedges the blade in the recess thereby securely locking the same to the cutter body.
Inventors
- 👤 E Czopor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:22
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/24; B23C5/2462; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1902; Y10T407/1906; Y10T407/1908; Y10T407/1912; Y10T407/1914; Y10T407/1916; Y10T407/1918; Y10T407/192; Y10T407/1928; Y10T407/193; Y10T407/22; Y10T407/2222; Y10T407/2226; Y10T407/2252; Y10T407/2254
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
378 words
In a cutting tool the combination comprising, a body having a generally rectangularly shaped recess therein adapted to receive a cutting blade, said recess having generally parallel spaced side walls defining a generally rectangularly shaped slot at at least one face of said body, said body having a circular cylindrical bore therein extending to said one face thereof adjacent said slot, the axis of said bore being disposed intermediate opposite ends of the recess and being spaced radially from the adjacent side of said recess a distance less than the radius of the bore such that the intersection of the recess and bore defines a generally rectangularly shaped chordal opening between the recess and bore, a blade locking element in said bore comprising a rotatable shaft disposed coaxially in said bore, the opposite end portions of said shaft having a radius less then the radial distance between the axis of said bore and the plane of said opening, a cam fixed on said shaft intermediate said ends, said cam having a cam surface extending peripherally around the axis of the shaft, said cam surface having a low side spaced radially from the axis of the bore a distance not greater than the radial distance between the axis of the bore and the plane of said opening, said cam surface also having a high side spaced radially from the axis of the bore a distance not greater than the radius of the bore but greater than the radial distance between the axis of the bore and the plane of said opening such that when the shaft is rotated said high side of the cam surface is adapted to project through said chordal opening into said recess into wedging engagement with a cutting blade seated therein, said bore having means at one end thereof forming a reduced diameter bore portion in which one end of the shaft is journalled and a bushing at the other end of said bore in which the other end of the shaft is journalled, said bushing being disposed at said one face of the body and having an outer diameter corresponding to the diameter of said bore, the peripheral portion of the bushing adjacent said slot being flat and substantially coplanar with said chordal opening.
Claim 2
Dependent Claim
378 words
In a cutting tool the combination comprising, a body having a generally rectangularly shaped recess therein adapted to receive a cutting blade, said recess having generally parallel spaced side walls defining a generally rectangularly shaped slot at at least one face of said body, said body having a circular cylindrical bore therein extending to said one face thereof adjacent said slot, the axis of said bore being disposed intermediate opposite ends of the recess and being spaced radially from the adjacent side of said recess a distance less than the radius of the bore such that the intersection of the recess and bore defines a generally rectangularly shaped chordal opening between the recess and bore, a blade locking element in said bore comprising a rotatable shaft disposed coaxially in said bore, the opposite end portions of said shaft having a radius less then the radial distance between the axis of said bore and the plane of said opening, a cam fixed on said shaft intermediate said ends, said cam having a cam surface extending peripherally around the axis of the shaft, said cam surface having a low side spaced radially from the axis of the bore a distance not greater than the radial distance between the axis of the bore and the plane of said opening, said cam surface also having a high side spaced radially from the axis of the bore a distance not greater than the radius of the bore but greater than the radial distance between the axis of the bore and the plane of said opening such that when the shaft is rotated said high side of the cam surface is adapted to project through said chordal opening into said recess into wedging engagement with a cutting blade seated therein, said bore having means at one end thereof forming a reduced diameter bore portion in which one end of the shaft is journalled and a bushing at the other end of said bore in which the other end of the shaft is journalled, said bushing being disposed at said one face of the body and having an outer diameter corresponding to the diameter of said bore, the peripheral portion of the bushing adjacent said slot being flat and substantially coplanar with said chordal opening.
Claim 3
Dependent Claim
20 words
The combination set forth in claim 1 wherein said bushing is fixedly retained in said last-mentioned end of said bore.
Claim 4
Dependent Claim
20 words
The combination set forth in claim 1 wherein said bushing is press fitted into said last-mentioned end of said bore.
Claim 5
Dependent Claim
24 words
The combination set forth in claim 1 wherein said bore is counterbored at said one end thereof to form said reduced diameter bore portion.
Claim 6
Dependent Claim
46 words
The combination set forth in claim 1 wherein said body is of generally circular shape and has opposite side faces, said one face of said body comprising one of said opposite side faces and said bore extending generally parallel to the central axis of said body.
Claim 7
Dependent Claim
57 words
The combination set forth in claim 1 wherein said body is of generally circular shape, said recess extending radially inwardly from the outer periphery of said body so that said one face of the body comprises the outer peripheral surface of the body, said bore extending generally radially inwardly of said body from said outer peripheral surface.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |