Patent US3749508A successfully refreshed from Google Patents.
US3749508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring machines
Assignee: Ludwigsburger Maschinenbau GmbH
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Filing: 1971-08-09
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Granted: 1973-07-31
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Expires: 1991-08-09
Abstract
Abstract Apparatus for supporting the boring or cutting tools of a boring machine comprising a rotatable spindle, a carrier mounted at one end of the spindle, and a tool holder extending from the carrier. An arm extends rearwardly from the tool holder into engagement with means for pivoting it. A tool holder is connected to the carrier by at least one torsion bar spring defining the swing axis of the tool holder and exerting a restorative force when twisted.
Inventors
- 👤 F Schukrafft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:50
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03432; B23B29/03457; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/34; B23Q1/36; B23Q1/44; B23Q1/50; B23Q1/54; B23Q1/5406; B23Q17/00; B23Q17/22; B23Q17/2216; Y; Y10; Y10T; Y10T408/00; Y10T408/16; Y10T408/17; Y10T408/172; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8583; Y10T408/85843; Y10T408/8588; Y10T408/85884; Y10T408/8595
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
Apparatus for supporting the tool of a boring device, comprising a rotatable spindle having a central axis, a carrier mounted at one end of said spindle, a tool holder extending from said carrier and holding said boring tools, an arm extending rearwardly from said tool holder, means engaging said arm for swinging said arm to pivot said tool holder within said carrier, said tool holder being connected to said carrier by a pair of diametrically opposed torsion bar springs extending along an axis transverse to the axis of said spindle defining the swing axis of said tool holder and exerting a restoring torque force thereon when twisted.
Claim 2
Dependent Claim
107 words
Apparatus for supporting the tool of a boring device, comprising a rotatable spindle having a central axis, a carrier mounted at one end of said spindle, a tool holder extending from said carrier and holding said boring tools, an arm extending rearwardly from said tool holder, means engaging said arm for swinging said arm to pivot said tool holder within said carrier, said tool holder being connected to said carrier by a pair of diametrically opposed torsion bar springs extending along an axis transverse to the axis of said spindle defining the swing axis of said tool holder and exerting a restoring torque force thereon when twisted.
Claim 3
Dependent Claim
59 words
The apparatus according to claim 1 wherein said spindle is hollow having a central longitudinal bore into which the arm extends and wherein the means for swinging said arm comprises a linearly reciprocable rod engaging said arm, said rod and said arm having cooperating wedge surfaces adapted to adjust the position of said arm on movement of said rod.
Claim 4
Dependent Claim
14 words
The apparatus according to claim 2 including means for automatically reciprocating said adjustment rod.
Claim 5
Dependent Claim
88 words
The apparatus according to claim 1 including a head at the frontal end of said spindle, the carrier comprising an outer ring flange secured to said head, and an inner body spaced from said flange and adapted to support the tool holder, said body being connected to said ring flange by said pair of diametrically opposed torsion bar springs integrally secured to both said ring flange and said body and forming the swing axis of said tool holder, said body having the rearwardly extending arm integrally formed therewith.
Claim 6
Dependent Claim
38 words
The apparatus according to claim 1 wherein the body has a central opening in its frontal face adapted to receive the tool holder, said tool holder including an annular flange and means securing said flange to said body.
Claim 7
Dependent Claim
47 words
The apparatus according to claim 5 including a centering ring encompassing the flange of the tool holder, said centering ring being secured to the ring flange of the carrier and including washer means seated between said centering flange and the tool holder flange to seal the same.
Claim 8
Dependent Claim
53 words
The apparatus according to claim 2 wherein the adjustment rod comprises a bifurcated member in which the arm is received, one of the bifurcated arms having an inclined surface forming a wedge adjacent one surface of said arm, a slide member secured to the one surface of said arm to engage said wedge.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |