Patent US3829230A successfully refreshed from Google Patents.
US3829230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapping attachment adapted for numerical control
Assignee: TOPMATIC CORP
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Filing: 1972-12-01
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Granted: 1974-08-13
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Expires: 1992-12-01
Abstract
Abstract The invention is a tapping attachment of a type having free axial float and automatic depth control. The attachment embodies precise adjustment means for precisely adjusting or controlling the point at which the depth control will release. The depth control includes releasable engagement members movable relatively axially to release. The control means comprises an adjustable limiting member which precisely controls or limits the amount of inward positioning of the driven part of the engagable means relative to the driving part and thereby sets the amount of outward relative movement of the driven part which will cause release. The adjustable limiting means embodies a spring to insure against damage occurring to the attachment in the event the tapping element should encounter the absence of a hole to be tapped.
Inventors
- 👤 A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:28
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/02; F16D43/20; B; B23; B23G; B23G1/00; B23G1/44; B23G1/46; B23G3/00; B23Q; B23Q11/00; B23Q11/04; B23Q5/00; B23Q5/22; B23Q5/52; Y; Y10; Y10T; Y10T408/00; Y10T408/18; Y10T408/73; Y10T408/75
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
156 words
A tapping attachment having a driving part and a driven part, said driven part including a tapping spindle; releasable engagement means between the driving part and the driven part constructed to allow relative axial movement of the driven part carrying the tapping spindle, means normally biasing said parts into engagement, said releasable engagement means releasing upon an outward axial movement of the driven part, the improvement comprising depth control means for predetermining the magnitude of axial movement of the driven part relative to the driving part to disengage said parts, said adjustment means comprising an adjustable member being adjustably positionable on one of said parts, spring means positioned between the adjustable member and the other of said parts to provide an axial opposed bias between said parts, whereby said adjustable member is adjustably positioned on said one part to preset the desired magnitude of relative axial movement of said parts which will bring about said disengagement.
Claim 2
Dependent Claim
156 words
A tapping attachment having a driving part and a driven part, said driven part including a tapping spindle; releasable engagement means between the driving part and the driven part constructed to allow relative axial movement of the driven part carrying the tapping spindle, means normally biasing said parts into engagement, said releasable engagement means releasing upon an outward axial movement of the driven part, the improvement comprising depth control means for predetermining the magnitude of axial movement of the driven part relative to the driving part to disengage said parts, said adjustment means comprising an adjustable member being adjustably positionable on one of said parts, spring means positioned between the adjustable member and the other of said parts to provide an axial opposed bias between said parts, whereby said adjustable member is adjustably positioned on said one part to preset the desired magnitude of relative axial movement of said parts which will bring about said disengagement.
Claim 3
Dependent Claim
33 words
An attachment as in claim 1, wherein said spring means is in the form of a coiled spring encircling the tapping spindle and positioned to be compressed by inward movement of said spindle.
Claim 4
Dependent Claim
17 words
A tapping attachment as in claim 2, wherein said adjustable member is carried by said driven member.
Claim 5
Dependent Claim
21 words
An attachment as in claim 3, wherein said adjustable member is in the form of a collar threaded onto the spindle.
Claim 6
Dependent Claim
29 words
A tapping attachment as in claim 2, wherein said adjustable member is carried by the driving member, the spring being interposed between the adjustable member and the driven member.
Claim 7
Dependent Claim
32 words
A tapping attachment as in claim 1, wherein said adjustable member is in the form of a bushing and a sleeve slidably carried by the bushing and engageable with the other part.
Claim 8
Dependent Claim
21 words
A tapping attachment as in claim 6, wherein said sleeve has an end flange positioned to seat against the other part.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |