US4842451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deburring drill bit
Assignee: Individual
•
Filing: 1988-02-05
•
Granted: 1989-06-27
•
Expires: 2008-02-05
Abstract
Abstract A deburring drill bit having a shank, an elongated shaft, a drill bit head having forward drilling surfaces formed in the head, and rearward deburring surfaces formed behind said forward drilling surfaces, whereby drilling and deburring can be performed in a single operation, the drilling surfaces having a first longitudinal axis and the deburring surfaces having a second longitudinal axis not coincident with said first longitudinal axis.
Inventors
- 👤 Ben A. Dugger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:06
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/102; B23B51/02; Y; Y10; Y10S; Y10S408/00; Y10S408/714; Y10T; Y10T408/00; Y10T408/31; Y10T408/33; Y10T408/89; Y10T408/899; Y10T408/909; Y10T408/9095; Y10T408/9097
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
111 words
Apparatus for drilling and deburring an aperture in a single operation comprising: (a) a shank having a first longitudinal axis; (b) an elongated shaft securred to said shank and having a second longitudinal axis not coincident with and not parallel to said first longitudinal axis; (c) a drill bit head securred to said shaft having a longitudinal axis coincident with said second longitudinal axis; (d) drilling surfaces formed in the forward edge of said head, said drilling surfaces having a longitudinal axis coincident with said second longitudinal axis; (e) deburring surfaces formed in the side of said shaft, said deburring surfaces having a longitudinal axis coincident with said first longitudinal axis.
Claim 2
Dependent Claim
111 words
Apparatus for drilling and deburring an aperture in a single operation comprising: (a) a shank having a first longitudinal axis; (b) an elongated shaft securred to said shank and having a second longitudinal axis not coincident with and not parallel to said first longitudinal axis; (c) a drill bit head securred to said shaft having a longitudinal axis coincident with said second longitudinal axis; (d) drilling surfaces formed in the forward edge of said head, said drilling surfaces having a longitudinal axis coincident with said second longitudinal axis; (e) deburring surfaces formed in the side of said shaft, said deburring surfaces having a longitudinal axis coincident with said first longitudinal axis.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 wherein said first longitudinal axis and said second longitudinal axis are angularly disposed up to five degrees from each other.
Claim 4
Dependent Claim
15 words
The apparatus of claim 2 wherein said angle is from one degree to three degrees.
Claim 5
Dependent Claim
19 words
The apparatus of claim 3 wherein said longitudinal axes intersect at the juncture of said shank and said shaft.
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) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |