Patent US3724328A successfully refreshed from Google Patents.
US3724328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plateau milling scheme for hydraulic tracers
Assignee: Milacron Inc
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Filing: 1971-11-04
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Granted: 1973-04-03
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Expires: 1991-11-04
Abstract
Abstract An apparatus for use with an hydraulic tracing system on a machine tool having a slide controlled by the deflection of a tracing stylus wherein there is provided a means for limiting the penetration of a cutting tool into a workpiece. The apparatus comprises means in series with a tracer control valve for shutting off fluid flow to the slide when the cutter has reached a preset penetration level and means for resetting this level.
Inventors
- 👤 E Yates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:57
CPC Classifications
B; B23; B23C; B23C1/00; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/18; B23Q2735/00; B23Q2735/02; B23Q2735/08; B23Q2735/085; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/303416; Y10T409/303472; Y10T409/30364
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
113 words
In a hydraulic tracing system for a machine tool having a slide controlled by the deflection of a stylus in contact with a template, wherein said stylus is affixed to an end of the plunger of a tracing control valve in fluidic communication with fluid actuating means for moving said slide, an apparatus for controlling the penetration level of a cutting tool moving with said slide into a workpiece, said apparatus comprising: a. means in fluid series with said tracer control valve for shutting off the fluid flow to said fluid actuating means when said tool reaches the penetration level; and b. means associated with said fluid series means adjusting the penetration level.
Claim 2
Dependent Claim
113 words
In a hydraulic tracing system for a machine tool having a slide controlled by the deflection of a stylus in contact with a template, wherein said stylus is affixed to an end of the plunger of a tracing control valve in fluidic communication with fluid actuating means for moving said slide, an apparatus for controlling the penetration level of a cutting tool moving with said slide into a workpiece, said apparatus comprising: a. means in fluid series with said tracer control valve for shutting off the fluid flow to said fluid actuating means when said tool reaches the penetration level; and b. means associated with said fluid series means adjusting the penetration level.
Claim 3
Dependent Claim
61 words
The apparatus of claim 1 wherein said means in fluid series comprises: a. a servo valve bushing which moves with said slide in response to the deflections of said stylus; b. a plunger in said bushing, designed to remain in a fixed position when said bushing moves in response to the stylus, for controlling fluid flow to the fluid actuating means.
Claim 4
Dependent Claim
90 words
The apparatus of claim 2 wherein said adjustment means comprises; a. a threaded shaft affixed to one end of said plunger; b. a non-rotating internally threaded receptacle suited to accept said threaded shaft whereby said threaded shaft moves axially with respect to said receptacle when said shaft is rotated; c. means for limiting the movement of said shaft thereby holding said shaft in a fixed position with respect to said bushing; and d. means for rotating said shaft for causing relative axial movement between said shaft and said non-rotating receptacle.
Claim 5
Dependent Claim
30 words
The apparatus of claim 3 wherein there is further provided means for biasing said shaft for causing movement of the shaft in one direction whenever said rotating means is employed-.
Claim 6
Dependent Claim
28 words
The apparatus of claim 4 wherein said biasing means is a spring placed within said servo valve bushing and is affixed to the other end of said plunger.
References Cited (Backward Citations)
US2836387A
Cited
US2958501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |