Tool for extracting anchor bolt from wall

• US 4,941,252 A
• Filed: 09/01/1988
• Issued: 07/17/1990
• Est. Priority Date: 09/01/1988
• Status: Expired due to Fees

• Current Assignee: Bernhard M. Haisch, Marilyn E. Bruner
• Original Assignee: Bernhard M. Haisch, Marilyn E. Bruner
• Inventors: Haisch, Bernhard M., Bruner, Marilyn E.
• Primary Examiner(s): Watson, Robert C.
• Application Number:
  US07/239,474
• Time in Patent Office: 684 Days
• Field of Search: 7/165, 29/231, 29/232, 29/240, 29/268, 29/258, 29/259, 29/260, 29/261, 29/262, 29/263, 29/280, 29/282, 29/283.5
• US Class Current: 29/261
• CPC Class Codes: B25B 27/023 using screws
• CPC Class Codes: B25B 27/062 using screws
• CPC Class Codes: B25B 31/00 Hand tools for applying fasteners nailing or stapling tools B25C
• CPC Class Codes: F16B 13/061 of the buckling type
• CPC Class Codes: Y10T 29/5387 Pivotal arms

Abstract

A hand-held tool capable of removing an anchor bolt, such as a molly bolt, from attachment to a wall. The tool of the present invention includes a pair of jaw members which move into gripping relationship onto the exposed end flange of an anchor bolt, following which a lead screw on the tool engages the attachment screw of the anchor bolt and forces the attachment screw inwardly of the wall. This action causes the legs of the anchor bolt to bend and to be straightened and to become sufficiently narrow in transverse dimension so that the anchor bolt can be manually pulled out of the wall through the hole provided therefor. In this way, the tool permits a quick and easy removal of an anchor bolt from a wall without having to damage the wall in any way.

Claims

1. A tool for removing an anchor bolt from attachment to a wall with the anchor bolt having a flange at one end thereof, an internally threaded sleeve at the opposite end, and an attachment screw threaded into the sleeve and located adjacent to a pair of bendable legs between the flange and the sleeve, the tool comprising:

a support;

means pivotally mounted on the support near one end thereof for coupling the support with the flange of the anchor bolt, said support having means for allowing movement of the attachment screw relative to said coupling means when the support is coupled to said flange; and

means carried by the support and engagable with the attachment screw of the anchor bolt for moving the attachment screw longitudinally of the anchor bolt and relative to the coupling means when the attachment screw is threaded into the sleeve, whereby the legs of the anchor bolt will be caused to become straightened until the transverse dimension of the anchor bolt is sufficient to allow it to be removed from the wall.

2. A tool as set forth in claim 1, wherein said coupling means includes a pair of jaw members, each jaw member including a jaw blade for placement between the flange and the wall in which the anchor bolt is secured.

3. A tool as set forth in claim 1, wherein said means for moving the attachment screw includes a lead screw having means thereon for engaging and forcing the attachment screw in a predetermined direction as a function of the rotation of lead screw.

4. A tool for removing an anchor bolt from attachment to a wall with the anchor bolt having a flange at one end thereof, an internally threaded sleeve at the opposite end, and an attachment screw threaded into the sleeve and located adjacent to a pair of bendable legs between the flange and the sleeve, the tool comprising;

a tube having a pair of opposed ends, one end of the tube being open;

a pair of jaw members pivotally mounted on the support near said one end thereof, said jaw members having respective jaw blades adapted to be coupled with the flange of the anchor bolt; and

a lead screw rotatably coupled to the tube at the opposite end thereof, said lead screw having a follower member within the tube and engagable with the attachment screw of the anchor bolt for moving the attachment screw longitudinally of the anchor bolt when the attachment screw is threaded into the sleeve, whereby the legs of the anchor bolt will be caused to be straightened until the transverse dimension of the anchor bolt is sufficient to allow it to be removed from the wall.

5. A tool as set forth in claim 4, wherein each jaw member has a handle extending longitudinally of the tube.

6. A tool as set forth in claim 4, wherein said tube has an internally threaded boss near the opposite end thereof, said lead screw being threadably coupled to said boss, there being a handle on the lead screw for manually rotating the latter.

7. A tool as set forth in claim 4, wherein each of said jaw members includes a handle, and means for interconnecting the jaw blade and the handle of each jaw member, respectively.

8. A tool as set forth in claim 7, wherein said interconnecting means includes a web.

9. A tool as set forth in claim 8, wherein the webs of the jaw members are in side-by-side relationship to each other.

10. A tool as set forth in claim 8, wherein said tube has a shaft mounted thereon for pivotally mounting the webs of the jaw members.

11. A tool as set forth in claim 10, wherein said shaft is on a tubular element telescoped on and secured to the tube.

12. A tool for removing an anchor bolt from attachment to a wall with the anchor bolt having a flange at one end thereof, an internally threaded sleeve at the opposite end, and an attachment screw threaded into the sleeve and located adjacent to a pair of bendable legs between the flange and the sleeve, the tool comprising:

a support, including a tube having an open end for receiving the adjacent portion of the attachment screw;

means pivotally mounted on the support near one end thereof, for coupling the support with the flange of the anchor bolt; and

means carried by the support and engagable with the attachment screw of the anchor bolt for moving the attachment screw longitudinally of the anchor bolt when the attachment screw is threaded into the sleeve, whereby the legs of the anchor bolt will be caused to become straightened until the transverse dimension of the anchor bolt is sufficient to allow it to be removed from the wall.

13. A tool for removing an anchor bolt from attachment to a wall with the anchor bolt having a flange at one end thereof, an internally threaded sleeve at the opposite end, and an attachment screw threaded into the sleeve and located adjacent to a pair of bendable legs between the flange and the sleeve, the tool comprising:

a support;

a pair of jaw members pivotally mounted on the support near one end thereof for coupling the support with the flange of the anchor bolt, each jaw member including a jaw blade for placement between the flange and the wall in which the anchor bolt is secured, each jaw member having a handle extending longitudinally of the support, and

means carried by the support and engagable with the attachment screw of the anchor bolt for moving the attachment screw longitudinally of the anchor bolt when the attachment screw is threaded into the sleeve, whereby the legs of the anchor bolt will be caused to become straightened until the transverse dimension of the anchor bolt is sufficient to allow it to be removed from the wall.

14. A tool for removing an anchor bolt from attachment to a wall with the anchor bolt having a flange at one end thereof, an internally threaded sleeve at the opposite end, and an attachment screw threaded into the sleeve and located adjacent to a pair of bendable legs between the flange and the sleeve, the tool comprising:

a support, including an elongated tube having an open end for receiving the attachment screw;

means pivotally mounted on the support near one end thereof for coupling the support with the flange of the anchor bolt; and

a lead screw threadably coupled to the tube and extending longitudinally thereof, said lead screw having a follower member on one end thereof for engaging the attachment screw of the anchor bolt for moving the attachment screw longitudinally of the anchor bolt when the attachment screw is threaded into the sleeve, whereby the legs of the anchor bolt will be caused to become straightened until the transverse dimension of the anchor bolt is sufficient to allow it to be removed from the wall.

15. A tool as set forth in claim 14, wherein said tube has an internally threaded boss near the opposite end thereof, such lead screw being threadably coupled to said boss, there being a handle on the lead screw for manually rotating the latter.

20. A tool as set forth in the claim 14, wherein the support comprises of a tube, said shaft being on a tubular element telescoped on and secured to the tube.

16. A tool for removing an anchor bolt from attachment to a wall with the anchor bolt having a flange at one end thereof, an internally threaded sleeve at the opposite end, and an attachment screw threaded into the sleeve and located adjacent to a pair of bendable legs between the flange and the sleeve, the tool comprising:

a support;

a pair of jaw members pivotally mounted on the support near one end thereof for coupling the support with the flange of the anchor bolt, each jaw member including a jaw blade, a handle and means for interconnecting the jaw blade and the handle; and

means carried by the support and engagable with the attachment screw of the anchor bolt for moving the attachment screw longitudinally of the anchor bolt when the attachment screw is threaded into the sleeve, whereby the legs of the anchor bolt will be caused to become straightened until the transverse dimension of the anchor bolt is sufficient to allow it to be removed from the wall.

17. A tool as set forth in claim 16, wherein said interconnecting means includes a web.

18. A tool as set forth in claim 17, wherein the webs of the jaw members are in side-by-side relationship to each other.

19. A tool as set forth in claim 18, wherein said support has a shaft mounted thereon for pivotally mounting the webs of the jaw members.