US3884590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable dual tool boring bar
Assignee: Lamb Technicon Corp
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Filing: 1974-05-22
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Granted: 1975-05-20
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Expires: 1994-05-22
Abstract
Abstract A machine tool having a boring bar mounted for rotative adjustment on a rotary spindle with its axis offset from the axis of the spindle. The boring bar is mounted on the spindle by means of a helically splined nut. A helically splined shaft is engaged with the nut to rotate it relative to the spindle in response to axial displacement of the shaft. Diametrically opposed cutting tools are mounted on the boring bar. When the nut is rotated through 180* the positions of the two tools are reversed, one being retracted radially inwardly and the other advanced radially outwardly.
Inventors
- 👤 Frank C Skrentner
- 👤 Werner W Willuweit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:35
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03432; B23B29/03478; Y; Y10; Y10T; Y10T408/00; Y10T408/16; Y10T408/175; Y10T408/83; Y10T408/85; Y10T408/854; Y10T408/858; Y10T408/8588
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
182 words
In a machine tool of the type comprising a support, a spindle journalled on said support for rotation about a fixed first axis, means for rotating said spindle, a tool holder mounted on said spindle and means associated therewith for rotative adjustment of said tool holder on said spindle about a second axis parallel to and spaced from said first axis, a pair of cutting tools mounted on said tool holder in circumferentially spaced relation, and a member movable in opposite directions and operatively connected with said rotative adjustment means for rotating said tool holder on said spindle about said second axis whereby to radially retract one tool and radially project the other tool relative to said first axis, that improvement which comprises, a pair of abutment means spaced apart in the path of movement of said movable member for limiting movement of said member in opposite directions and means for individually adjusting said abutment means to vary the locus of the opposite ends of the stroke of said member and thereby individually adjust the radially outermost position of each cutting tool.
Claim 2
Dependent Claim
182 words
In a machine tool of the type comprising a support, a spindle journalled on said support for rotation about a fixed first axis, means for rotating said spindle, a tool holder mounted on said spindle and means associated therewith for rotative adjustment of said tool holder on said spindle about a second axis parallel to and spaced from said first axis, a pair of cutting tools mounted on said tool holder in circumferentially spaced relation, and a member movable in opposite directions and operatively connected with said rotative adjustment means for rotating said tool holder on said spindle about said second axis whereby to radially retract one tool and radially project the other tool relative to said first axis, that improvement which comprises, a pair of abutment means spaced apart in the path of movement of said movable member for limiting movement of said member in opposite directions and means for individually adjusting said abutment means to vary the locus of the opposite ends of the stroke of said member and thereby individually adjust the radially outermost position of each cutting tool.
Claim 3
Dependent Claim
19 words
The combination called for in claim 1 wherein the tools are spaced different radial distances from said second axis.
Claim 4
Dependent Claim
18 words
The combination called for in claim 1 wherein said tools are spaced axially apart on said tool holder.
Claim 5
Dependent Claim
29 words
The combination called for in claim 3 wherein said tools are shaped to cut in both axial and radial directions and including means for moving said spindle support axially.
Claim 6
Dependent Claim
39 words
The combination called for in claim 1 wherein the abutment means are adjustable to positions wherein the full stroke of said member produces rotation of said tool holder relative to said spindle through an angle of less than 180*.
Claim 7
Dependent Claim
16 words
The combination called for in claim 1 wherein said member is movable in a rectilinear path.
Claim 8
Dependent Claim
60 words
The combination called for in claim 6 wherien each of said abutment means comprises a wedge having a stop face inclined at an acute angle to the path of travel of said member, said member having a pair of stop faces thereon engageable by the stop faces of said wedges at the opposite ends of the stroke of said member.
Claim 9
Dependent Claim
25 words
The combination called for in claim 7 including means for shifting said wedges in a direction transversely of the path of travel of said member.
Claim 10
Dependent Claim
33 words
The combination called for in claim 8 wherein said member comprises a slide axially aligned with said spindle and connected to the spindle so that the spindle can rotate relative to the slide.
Claim 11
Dependent Claim
35 words
The combination called for in claim 8 including a rotary motor for each of said wedges, a screw having a threaded connection with each wedge, said screws being connected to be rotated by said motors.
Claim 12
Dependent Claim
70 words
The combination called for in claim 1 wherein said tools are disposed on said tool holder in generally diametrically opposed relation with respect to the axis of the tool holder, said abutment means being positioned such that when said member is at the opposite ends of its stroke the tools are angularly displaced from a plane passing through the axis of the tool holder and the axis of the spindle.
Claim 13
Dependent Claim
16 words
The combination called for in claim 11 wherein said angular displacement amounts to at least 20*.
Claim 14
Dependent Claim
39 words
The combination called for in claim 12 wherein said abutment means are spaced apart such that the full stroke of said member produces rotation of said tool holder relative to said spindle through an angle of less than 180*.
Claim 15
Dependent Claim
18 words
The combination called for in claim 13 wherein said angle of rotation is not more than about 160*.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |