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Patent US3673657A successfully refreshed from Google Patents.
US3673657A
Expired / Lapsed
US
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Device for clamping a cutting insert to a seat of a toolholder body
Assignee: Fagersta Bruks AB
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Filing: 1969-11-14
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Granted: 1972-07-04
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Expires: 1989-11-14
Abstract
Abstract A device for clamping a cutting insert to a seat of a toolholder body, said seat having a supporting and a pair of transversely oriented holding surfaces against which the insert is firmly wedged during the threaded engagement of a clamp screw in an inclined threaded opening in the toolholder seat. The inclination of the threaded opening is such as to produce the desired wedging effect against one holding surface during rotative or tightening manipulation of the screw, while said rotative screw movement produces the wedging effect against the other transverse holding surface.
Inventors
- 👤 Manfred Wallace Gustafson
- 👤 Torsten Sandrud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:04
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2265; B23C5/2269; F; F16; F16B; F16B2/00; F16B2/02; F16B2/14; F16B5/00; F16B5/06; Y; Y10; Y10T; Y10T407/00; Y10T407/11; Y10T407/22; Y10T407/2272; Y10T407/2282; Y10T407/2284; Y10T407/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
354 words
A toolholder construction comprising: a toolholder body (10) having a means (16) defining an insert support surface and a pair of transversely oriented first (14) and second (17) holding surfaces bordering said support surface defining means (16) and cooperating therewith to define a tool insert seat (11), a tool insert (12) of a prescribed shape presenting an opposite first and second pair of side walls (15) and an end wall (18) therebetween operatively mounted on said support surface defining means (16) within said insert seat (11), with said second side wall (15) and said end wall (18) in loose engagement respectively against said first (14) and second (17) holding surfaces, said tool holder body (10) having a threaded opening (19) therein located adjacent to said support surface defining means (16) and adjacent said tool insert (12) in said mounted position thereof and angularly oriented in the direction of said first (14) holding surface effective to define a clearance space of a progressively diminishing extent between the longitudinal center of said threaded opening (19) and said first holding surface (14), said threaded opening (19) having a partial counterbore in said upper end effective to provide an angularly inclined third holding surface (25) in facing relation to said first holding surface (14), and a threaded member (21) with a round head having an operative position in threaded engagement within said threaded opening (19) incident to rotation thereof effecting said threaded engagement, said head of said threaded member being rotatable to said operative position wherein said head of said threaded member (21) is in direct abutment against said first side wall (15) of said tool insert (12) in wedge relation between said facing first (14) and third (25) holding surfaces and said tool insert end wall (18) in seated relation against said second holding surface (17), whereby said wedged relation results from wedging movement of said head of said threaded member (21) through said clearance space of progressively diminishing extent and said seated relation from rotation of said head of said threaded member (21) in the direction of said second holding surface (17) during said wedging movement.
Claim 2
Dependent Claim
354 words
A toolholder construction comprising: a toolholder body (10) having a means (16) defining an insert support surface and a pair of transversely oriented first (14) and second (17) holding surfaces bordering said support surface defining means (16) and cooperating therewith to define a tool insert seat (11), a tool insert (12) of a prescribed shape presenting an opposite first and second pair of side walls (15) and an end wall (18) therebetween operatively mounted on said support surface defining means (16) within said insert seat (11), with said second side wall (15) and said end wall (18) in loose engagement respectively against said first (14) and second (17) holding surfaces, said tool holder body (10) having a threaded opening (19) therein located adjacent to said support surface defining means (16) and adjacent said tool insert (12) in said mounted position thereof and angularly oriented in the direction of said first (14) holding surface effective to define a clearance space of a progressively diminishing extent between the longitudinal center of said threaded opening (19) and said first holding surface (14), said threaded opening (19) having a partial counterbore in said upper end effective to provide an angularly inclined third holding surface (25) in facing relation to said first holding surface (14), and a threaded member (21) with a round head having an operative position in threaded engagement within said threaded opening (19) incident to rotation thereof effecting said threaded engagement, said head of said threaded member being rotatable to said operative position wherein said head of said threaded member (21) is in direct abutment against said first side wall (15) of said tool insert (12) in wedge relation between said facing first (14) and third (25) holding surfaces and said tool insert end wall (18) in seated relation against said second holding surface (17), whereby said wedged relation results from wedging movement of said head of said threaded member (21) through said clearance space of progressively diminishing extent and said seated relation from rotation of said head of said threaded member (21) in the direction of said second holding surface (17) during said wedging movement.
Claim 3
Dependent Claim
27 words
A toolholder construction as defined in claim 1 including an anvil member mounted in an interposed position between said tool insert (12) and said toolholder body (10).
Claim 4
Dependent Claim
26 words
A toolholder construction as defined in claim 1 wherein said partial counterbore is conical and wherein said round head of said threaded member (21) is conical.
Claim 5
Dependent Claim
26 words
A toolholder construction as defined in claim 1 wherein said partial counterbore is cylindrical and wherein said round head of said threaded member (21) is cylindrical.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |