Patent US2443560A successfully refreshed from Google Patents.
Patent US3717892A successfully refreshed from Google Patents.
US3717892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapping attachment for numerical control
Assignee: Tapmatic Corp
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Filing: 1970-04-09
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Granted: 1973-02-27
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Expires: 1990-04-09
Abstract
Abstract The invention is a tapping attachment of the type having free axial float. Direct and reverse drive is provided for by way of planetary gears for driving at the same speed in direct and reverse drive. An adjustment is provided for the magnitude of the free axial float. Spring biased clutch driver members are provided for both the direct and reverse drive providing a narrow, neutral position which cooperates with the adjustment of the free axial float. The attachment accommodates itself in a number of ways to numerical or computer control.
Inventors
- 👤 A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:07
CPC Classifications
B; B23; B23G; B23G1/00; B23G1/44; B23G1/46; B23G1/465; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6771; Y10T408/6776; Y10T408/70; Y10T408/72
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
In a tapping attachment having a body member adapted to be rotated about an axis thereof, a tapping spindle mounted for rotation about said axis and for free axial movement along said axis relative to said body member, and positive drive clutch means for drivingly connecting said body member to said tapping spindle, the improvement comprising; said clutch means being defined by relatively axially movable elements on said body member and tapping spindle, respectively, said elements being in mutually driving engagement throughout a range of relative axial movement and being relatively axially movable in one direction to disengage said clutch means; biasing means normally biasing said elements to move into clutch engaging relation; and adjustable limiting means on said attachment for predetermining the extent of axial movement of said elements in a clutch engaging direction for presetting the magnitude of relative axial movement from full clutch engagement to disengagement thereof.
Claim 2
Dependent Claim
150 words
In a tapping attachment having a body member adapted to be rotated about an axis thereof, a tapping spindle mounted for rotation about said axis and for free axial movement along said axis relative to said body member, and positive drive clutch means for drivingly connecting said body member to said tapping spindle, the improvement comprising; said clutch means being defined by relatively axially movable elements on said body member and tapping spindle, respectively, said elements being in mutually driving engagement throughout a range of relative axial movement and being relatively axially movable in one direction to disengage said clutch means; biasing means normally biasing said elements to move into clutch engaging relation; and adjustable limiting means on said attachment for predetermining the extent of axial movement of said elements in a clutch engaging direction for presetting the magnitude of relative axial movement from full clutch engagement to disengagement thereof.
Claim 3
Dependent Claim
38 words
An attachment as in claim 1 wherein the said adjustable means comprises a member threadedly adjustable relative to the body member and positionable to be engaged by the tapping spindle to limit the extent of axial movement thereof.
Claim 4
Dependent Claim
49 words
An attachment as in claim 1 wherein said clutch element On said body is movable thereon and adapted to engage the element on said spindle for direct drive, and a biasing spring acting against the direct drive clutch member on said body to allow clutching and declutching without chattering.
Claim 5
Dependent Claim
28 words
A tapping attachment as in claim 3 including reverse driving means whereby the tapping spindle is driven at the same speed in direct drive as in reverse drive.
Claim 6
Dependent Claim
35 words
A tapping attachment as in claim 4 wherein the drive to the spindle comprises a planetary gear transmission including planetary gears and a direct drive gear and a reverse drive gear of the same size.
References Cited (Backward Citations)
US332436A
Cited
US1127754A
Cited
US1915542A
Cited
US2287192A
Cited
US2848239A
Cited
US3075398A
Cited
US3226993A
Cited
US3214773A
Cited
US3397588A
Cited
US3579688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |