Patent US1833874A successfully refreshed from Google Patents.
Patent US3246351A successfully refreshed from Google Patents.
US3246351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tap with chip removal means
Assignee: Individual
•
Filing: 1963-08-02
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Granted: 1966-04-19
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Expires: 1983-08-02
Abstract
No abstract record available.
Inventors
- 👤 Lorence Erwin Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:49
CPC Classifications
B; B23; B23G; B23G5/00; B23G5/02; B23G5/06; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/904; Y10T408/9044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN A TAP FOR CUTTING THREADS, A FIRST CUTTING TOOTH EXTENDING ALONG A THREAD SPIRAL ON THE TAP AND HAVING A CREST TAPERED AXIALLY OF THE TAP, SAID TOOTH HAVING A RECESS IN ONE SIDE EDGE OF THE CREST SO THAT THE CREST HAS AN AXIAL DIMENSION APPROXIMATELY ONE-HALF OF THE WIDTH OF THE THREAD TO BE CUT, A SECOND CUTTING TOOTH FOLLOWING THE FIRST CUTTING TOOTH ALONG THE THREAD SPIRAL AND HAVING A CREST TAPERED AXIALLY AND HAVING A RECESS IN THE OPPOSITE SIDE EDGE SO THAT THE CREST HAS AN AXIAL DIMENSION APPROXIMATELY ONE-HALF OF THE WIDTH OF THE THREAD TO BE CUT, AND A THIRD TOOTH FOLLOWING SAID SECOND CUTTING TOOTH AND HAVING A CREST EXTENDING GENERALLY PARALLEL TO THE AXIS OF THE TAP AND HAVING A MAJOR DIAMETER LESS THAN THE MAJOR DIAMETER OF SAID CUTTING TEETH, SAID FIRST AND SECOND CUTTING TEETH, IN COMBINATION, CUTTING THE FULL THREAD WIDTH AND THE THIRD TOOTH SERVING TO REMOVE THE CUT CHIPS FROM THE THREAD.
Claim 2
Dependent Claim
167 words
IN A TAP FOR CUTTING THREADS, A FIRST CUTTING TOOTH EXTENDING ALONG A THREAD SPIRAL ON THE TAP AND HAVING A CREST TAPERED AXIALLY OF THE TAP, SAID TOOTH HAVING A RECESS IN ONE SIDE EDGE OF THE CREST SO THAT THE CREST HAS AN AXIAL DIMENSION APPROXIMATELY ONE-HALF OF THE WIDTH OF THE THREAD TO BE CUT, A SECOND CUTTING TOOTH FOLLOWING THE FIRST CUTTING TOOTH ALONG THE THREAD SPIRAL AND HAVING A CREST TAPERED AXIALLY AND HAVING A RECESS IN THE OPPOSITE SIDE EDGE SO THAT THE CREST HAS AN AXIAL DIMENSION APPROXIMATELY ONE-HALF OF THE WIDTH OF THE THREAD TO BE CUT, AND A THIRD TOOTH FOLLOWING SAID SECOND CUTTING TOOTH AND HAVING A CREST EXTENDING GENERALLY PARALLEL TO THE AXIS OF THE TAP AND HAVING A MAJOR DIAMETER LESS THAN THE MAJOR DIAMETER OF SAID CUTTING TEETH, SAID FIRST AND SECOND CUTTING TEETH, IN COMBINATION, CUTTING THE FULL THREAD WIDTH AND THE THIRD TOOTH SERVING TO REMOVE THE CUT CHIPS FROM THE THREAD.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |