IP Library › Granted Patent US 9,352,459
Granted Patent B2
US 9,352,459 · App. 14/245,436 · Granted May 31, 2016

Broken bolt extractor

Inventor: Marvin Thomas (St. Louis, MO)
B25B27/18B23B51/08B23B2251/64
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 9,352,459
App. No.
14/245,436
Granted
May 31, 2016
Kind
B2
Abstract

A broken bolt extractor is disclosed which comprises a counter clockwise cutting tip section for drilling a bore into a broken bolt, the cutting tip section being tapered, an intermediate gripping section having a gripping edge for gripping a side of the bore drilled into the broken bolt, the intermediate gripping section being tapered, and a shaft section for attachment to a tool for rotating the extractor.

Claims (29)

1. A broken bolt extractor comprising:

a counter clockwise cutting tip section for drilling a bore into a broken bolt, the cutting tip section being tapered;

an intermediate gripping section having a gripping edge for gripping a side of the bore drilled into the broken bolt, the intermediate gripping section being tapered; and

a shaft section for attachment to a tool for rotating the extractor.

2. The broken bolt extractor of claim 1 wherein the shaft section is straight.

3. The broken bolt extractor of claim 1 wherein the intermediate gripping section has a length and the shaft section has a length and the lengths are equal.

4. The broken bolt extractor of claim 3 wherein the length of the intermediate gripping section is one and a half inches.

5. The broken bolt extractor of claim 3 wherein the length of the shaft section is one and a half inches.

6. The broken bolt extractor of claim 1 wherein the cutting tip section has a length and the intermediate gripping section has a length and the length of the intermediate gripping section is greater than the length of the cutting tip section.

7. The broken bolt extractor of claim 6 wherein the length of the cutting tip section is half an inch.

8. A broken bolt extractor comprising:

a counter clockwise cutting tip section for drilling a bore into a broken bolt, the cutting tip section being tapered;

an intermediate gripping section having a number of gripping edges disposed radially about the intermediate gripping section, the gripping edges for gripping a side of the bore drilled into the broken bolt, the intermediate gripping section being tapered; and

a shaft section for attachment to a tool for rotating the extractor.

9. The broken bolt extractor of claim 8 wherein the number of grinding edges is four.

10. The broken bolt extractor of claim 8 wherein the shaft section is straight.

11. The broken bolt extractor of claim 8 wherein the intermediate gripping section has a length and the shaft section has a length and the lengths are equal.

12. The broken bolt extractor of claim 11 wherein the length of the intermediate gripping section is one and a half inches.

13. The broken bolt extractor of claim 11 wherein the length of the shaft section is one and a half inches.

14. The broken bolt extractor of claim 8 wherein the cutting tip section has a length and the intermediate gripping section has a length and the length of the intermediate gripping section is greater than the length of the cutting tip section.

15. The broken bolt extractor of claim 8 wherein the gripping edges each have a length and the intermediate gripping section has a length and the length of the intermediate gripping section is greater than each length of each gripping edge.

16. A broken bolt extractor comprising:

a counter clockwise cutting tip section for drilling a bore into a broken bolt, the cutting tip section being tapered;

an intermediate gripping section having a number of gripping edges disposed radially about the intermediate gripping section, the gripping edges for gripping into a side of the bore drilled into the broken bolt, the intermediate gripping section being tapered and the grinding edges being straight; and

a shaft section for attachment to a tool for rotating the extractor.

17. The broken bolt extractor of claim 16 wherein the intermediate gripping section has a length and the shaft section has a length and the lengths are equal.

18. The broken bolt extractor of claim 17 wherein the length of the intermediate gripping section is one and a half inches and the length of the shaft section is one and a half inches.

19. The broken bolt extractor of claim 16 wherein the cutting tip section has a length and the intermediate gripping section has a length and the length of the intermediate gripping section is greater than the length of the cutting tip section.

20. The broken bolt extractor of claim 16 wherein the gripping edges each have a length and the intermediate gripping section has a length and the length of the intermediate gripping section is greater than each length of each gripping edge.

Continuity (1)
Related Publication 20150283626A1 · Oct 8, 2015