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US 4,375,772 AGranted
Screw anchor screw removal device
AssigneeMargaret M. Milhouse
InventorsNeil C. Brackett, William W. Kester
Life of this patent
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Abstract
A device is disclosed for removing a plurality of screws from a surface utilizing a threaded screw opening in the surface comprising a structure, a screw anchor assembly, a screw removal assembly, drive means, and pressure handle assembly.
Claims32
A device for removing a plurality of screws from a surface utilizing a threaded screw opening in said surface comprising:
- a. a structure;
- b. a screw anchor assembly, adjustably and pivotably mounted on said structure and operative to be secured in said threaded screw opening, comprising:
- (1) an anchoring screw operative to be secured into said threaded screw opening;
- (2) anchoring screw turning means rigidly securable to said anchoring screw operative to move said anchoring screw to be secured into or removed from said threaded screw opening;
- and
- (3) height adjustment means adjustably and pivotably mounted on said structure and operative to vary the height of said screw anchor assembly with respect to said structure and, therefore, the distance of said anchoring screw from said structure, said height adjustment means operating independent of the movement of said anchoring screw turning means, with said anchoring screw turning means secured within said height adjustment means;
- c. a screw removal assembly adjustably mounted on said structure operative to be pressed into the top of one of said plurality of screws;
- d. driving means secured to said screw removal assembly operative to move said screw removal assembly in order to remove said one of said plurality of screws from said surface;
- and
- e. wherein said screw anchor assembly further comprises an anchoring screw retaining member operable to hold said anchoring screw and securable to said anchoring screw turning means, wherein said anchoring screw retaining member has a sloped lower section whereby said anchoring screw may have a screw head of varying dimensions and still properly be secured in said anchoring screw retaining member, whereby said anchoring screw is held rigidly in said screw anchor assembly when said anchoring screw is placed into said anchoring screw retaining member, and said anchoring screw retaining member is rigidly secured to said anchoring screw turning means,
- whereby said screw removal assembly can be positioned over any of said plurality of screws remaining for removal purposes by utilizing said threaded screw opening or another threaded screw opening in said surface which might be created by removal of any one of said plurality of screws.
8 more elements
Dependencies are inferred from the claim text.