US6221A - Combined convex and concave auger - Google Patents
Combined convex and concave auger Download PDFInfo
- Publication number
- US6221A US6221A US6221DA US6221A US 6221 A US6221 A US 6221A US 6221D A US6221D A US 6221DA US 6221 A US6221 A US 6221A
- Authority
- US
- United States
- Prior art keywords
- auger
- concave
- plate
- combined convex
- convex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 206010002368 Anger Diseases 0.000 description 4
- 210000003141 Lower Extremity Anatomy 0.000 description 4
- 101700055557 CNBD2 Proteins 0.000 description 2
- 210000000088 Lip Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003292 diminished Effects 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G15/00—Boring or turning tools; Augers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/902—Having central lead-screw
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Definitions
- My improvement consists as follows. Instead of having the plate from which the auger is to be twisted of concaved shape throughout as is usual in forming concave angers, I form the lower extremity of the plate of convex shape, or of even thickness, though the former is preferred. In an auger of five eighths diameter it will be sufficient to have about an inch of the lower extremity of convex shape or of even thickness as aforesaid, varying in proportion as the diameter of the auger is increased or diminished.
- That I claim as my invention and desire to secure by Letters Patent is- Forming the lower part of the plate from which an auger' is to be formed, of a convex shape or of even thickness, when this is combined with the upper part of the plate formed of a concave shape.
- the whole plate being formed for the purpose of making therefrom a double lipped convex and concave auger.
Description
'UNITED sTATEs PATENT oEETcE.
NATHL. C. SANFORD, OF MERIDEN, CONNECTICUT.
C01VI]2-I]\TE'|D CONVEX AND CONCAVE AUGER.
Specification of Letters Patent No. 6,221, dated March 27, 1849.
To'aZZ whom t may concern Be it known that I, NATHANIEL C. SAN- FORD, of the town of Meriden, in New Haven county and State of Connecticut, have invented a new and useful Improvement in Form and Construction of Concave Screw- Angers.
My improvement consists as follows. Instead of having the plate from which the auger is to be twisted of concaved shape throughout as is usual in forming concave angers, I form the lower extremity of the plate of convex shape, or of even thickness, though the former is preferred. In an auger of five eighths diameter it will be sufficient to have about an inch of the lower extremity of convex shape or of even thickness as aforesaid, varying in proportion as the diameter of the auger is increased or diminished.
The advantage of this mode of constructhe plate a short twist. at the lower eX- tremity and finish the cutting lips or edges in the best and most approved method for easy boring, than when the plate is formed in the usual way of concave shape throughw out.
That I claim as my invention and desire to secure by Letters Patent is- Forming the lower part of the plate from which an auger' is to be formed, of a convex shape or of even thickness, when this is combined with the upper part of the plate formed of a concave shape. The whole plate being formed for the purpose of making therefrom a double lipped convex and concave auger.
In witness whereof I have hereto set my hand and seal this twenty third day of October A. D. 1848.
NATHANIEL' C. SANFORD.
In presence of- Cris. IV. CURTISS. JN0. S. BEACH.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US6221A true US6221A (en) | 1849-03-27 |
Family
ID=2066522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US6221D Expired - Lifetime US6221A (en) | Combined convex and concave auger |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US6221A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6652203B1 (en) | 2002-08-30 | 2003-11-25 | Credo Technology Corporation | Precision drill bits |
| US20070000700A1 (en) * | 2005-06-30 | 2007-01-04 | Switzer Bruce D | Twist bit for drilling mortar and for optimizing dissipation of heat and dust created by the drilling |
| USD859483S1 (en) * | 2016-12-06 | 2019-09-10 | Milwaukee Electric Tool Corporation | Drill bit |
| US11285632B2 (en) | 2018-03-21 | 2022-03-29 | Milwaukee Electric Tool Corporation | Auger |
-
0
- US US6221D patent/US6221A/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6652203B1 (en) | 2002-08-30 | 2003-11-25 | Credo Technology Corporation | Precision drill bits |
| US20070000700A1 (en) * | 2005-06-30 | 2007-01-04 | Switzer Bruce D | Twist bit for drilling mortar and for optimizing dissipation of heat and dust created by the drilling |
| USD859483S1 (en) * | 2016-12-06 | 2019-09-10 | Milwaukee Electric Tool Corporation | Drill bit |
| USD923674S1 (en) * | 2016-12-06 | 2021-06-29 | Milwaukee Electric Tool Corporation | Drill bit |
| USD1007546S1 (en) | 2016-12-06 | 2023-12-12 | Milwaukee Electric Tool Corporation | Drill bit |
| US11285632B2 (en) | 2018-03-21 | 2022-03-29 | Milwaukee Electric Tool Corporation | Auger |
| US11850767B2 (en) | 2018-03-21 | 2023-12-26 | Milwaukee Electric Tool Corporation | Auger |
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