US3839772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting tool with adjustable and replaceable cutting tips
Assignee: Mitsubishi Metal Corp
•
Filing: 1973-07-31
•
Granted: 1974-10-08
•
Expires: 1993-07-31
Abstract
Abstract An adjustable cutting tool comprises a cylindrical tool body having several seats disposed with spacings around an outer peripheral part of the tool body, the same number of blade blocks each held in a respective seat, several cutting blade tips mounted on respective blade blocks, an adjusting device for adjustably moving each blade block along guide walls of its seat for adjustment of the position of the cutting edge of the cutting blade tip, a lever member for applying continuous spring force to each blade block toward the adjusting device thereby to prevent backlash, and a securing bolt for positively securing each blade block to the tool body with a compressed spring interposed therebetween.
Inventors
- 👤 H Shimomura
- 👤 T Suganami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:55
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/24; B23C5/2462; B23C5/2204; B23C5/2226; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/1912; Y10T407/1932; Y10T407/1934; Y10T407/1936; Y10T407/22; Y10T407/2214; Y10T407/222
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
An adjustable cutting tool comprising: a tool body (1) having a plurality of seats (2) each defined by guide wall surfaces (2a, 2b); a plurality of blade blocks (4) each held against the guide wall surfaces of a respective seat; a plurality of replaceable cutting blade tips (3) each mounted on a respective blade block; adjusting means (7, 8 or 13) adapted to act on and cause each blade block to slide along the guide wall surfaces for adjustment of the cutting edge position of the cutting blade tip; backlash preventing means comprising a biasing member (10 or 14) for imparting a force due to deformation of an elastic structure (11 or 14) to each blade block in a direction to force the block positively, without play, against the adjusting means; securing means (6) for positively fixing each blade block thus adjusted to the tool body; and spring means (5) for imparting a retaining force to the blade block toward the guide wall surface even when said securing means is slightly loosened preparatory to adjustment of the blade block.
Claim 2
Dependent Claim
179 words
An adjustable cutting tool comprising: a tool body (1) having a plurality of seats (2) each defined by guide wall surfaces (2a, 2b); a plurality of blade blocks (4) each held against the guide wall surfaces of a respective seat; a plurality of replaceable cutting blade tips (3) each mounted on a respective blade block; adjusting means (7, 8 or 13) adapted to act on and cause each blade block to slide along the guide wall surfaces for adjustment of the cutting edge position of the cutting blade tip; backlash preventing means comprising a biasing member (10 or 14) for imparting a force due to deformation of an elastic structure (11 or 14) to each blade block in a direction to force the block positively, without play, against the adjusting means; securing means (6) for positively fixing each blade block thus adjusted to the tool body; and spring means (5) for imparting a retaining force to the blade block toward the guide wall surface even when said securing means is slightly loosened preparatory to adjustment of the blade block.
Claim 3
Dependent Claim
45 words
An adjustable cutting tool as claimed in claim 1 in which the tool body has a shape substantially of a circular cylinder rotating about its centerline during cutting operation, and said seats are disposed with spacings around an outer peripheral part of the tool body.
Claim 4
Dependent Claim
59 words
An adjustable cutting tool as claimed in claim 1 in which said adjusting means comprises, for each blade block, a wedge member (7) having an inclined wedge face in sliding contact with a mating inclined surface of said blade block and screw means (8) for adjustably moving the wedge member in wedge action to adjustably more said blade block.
Claim 5
Dependent Claim
45 words
An adjustable cutting tool as claimed in claim 1 in which said adjusting means comprises, for each blade block, an adjusting screw (13) thread engaged with an integral part of the tool body and abutting at one end against a surface of said blade block.
Claim 6
Dependent Claim
68 words
An aDjustable cutting tool as claimed in claim 1 in which said biasing member of the backlash preventing means is a lever member (10) pivotally supported at a point intermediate between two ends thereof by the tool body and bearing at its one end against a stepped part (4d) of each blade block and at its other end against a spring (11) exerting thereon a counter spring force.
Claim 7
Dependent Claim
58 words
An adjustable cutting tool as claimed in claim 1 in which the said biasing member of the backlash preventing member is an elastic lever plate (14) anchored at its proximal end to the tool body and functioning as a leaf-spring to bear at its distal end with spring force on a stepped part (4d) of each blade block.
Claim 8
Dependent Claim
48 words
An adjustable cutting tool as claimed in claim 2 in which said guide walls of each seat are substantially perpendicular to each other and substantially parallel to said centerline of the tool body, whereby each blade block is adjustably moved in a direction substantially parallel to said centerline.
Claim 9
Dependent Claim
15 words
An adjustable cutting tool as claimed in claim 7 which is adapted for face milling.
Claim 10
Dependent Claim
132 words
An adjustable cutting tool as claimed in claim 1 in which said securing means comprises a blade block securing bolt (6) having a head, an unthreaded shank passed through each blade block, and a threaded part screwed into the tool body, said head bearing firmly against said blade block when the bolt is tightened, and said spring means comprises a compression spring (5) disposed around said unthreaded shank and within a countersunk hole in the blade block and abutting at one end against said head of the bolt and at the other end against the bottom of said countersunk hole, said compression spring functioning to impart a retaining force to the blade block toward the guide wall surface even when the bolt is slightly loosened preparatory to adjustment of the blade block.
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |