Spring-loaded camming nut
OwnerKarl Guthrie, Joseph Schwartzinventors
Life of this patent
Estimating the term…
Abstract
The spring-loaded camming nut of the invention includes first and second wedge-shaped chock portion. The first chock portion is wedge-shaped and larger than the second. The second chock portion is prism-shaped with a triangular cross-section. Means are provided for moving the first chock portion axially, lateral to the second chock portion. As the smaller second chock portion travels along the larger first chock portion, toward the crack's opening the first chock portion rotates on its horizontal axis, causing a tooth of the second chock portion to move horizontally and upwardly, into the rock.
Claims20
Apparatus for engaging a crack in a solid surface, comprising:
- a. a generally wedge-shaped first chock portion, including a wider end and a narrower end;
- b. a generally planar inner face between said wedge-shaped chock portion's wider end and narrower end;
- c. a convexly-curved outer face between said wedge-shaped chock portion's wider end and narrower end, said outer face projecting in a direction opposed from said inner face;
- d. a second chock portion, having a generally planar inner face and an apex projecting in a direction opposed from said planar inner face;
- and,
- e. means for causing said planar inner face of said second chock portion to lie flush against said planar inner face of said first chock portion.
Apparatus for engaging a crack in a solid surface, comprising:
- a. a generally wedge-shaped first chock portion, including a wider end and a narrower end;
- b. a generally planar inner face between said wedge-shaped chock portion's wider end and narrower end;
- c. a convexly-curved outer face between said wedge-shaped chock portion's wider end and narrower end, said outer face projecting in a direction opposed from said inner face;
- d. a second chock portion, having a generally planar inner face and an apex projecting in a direction opposed from said planar inner face;
- e. means for causing said planar inner face of said second chock portion to lie flush against said planar inner face of said first chock portion;
- f. means for moving said second chock portion axially, lateral to said first chock portion;
- and,
- g. means for suspending a load from said narrower end of said first chock portion.
Apparatus for engaging a crack in a solid surface, comprising:
- a. a generally wedge-shaped first chock portion, including a wider end and a narrower end;
- b. a generally planar inner face between said wedge-shaped chock portion's wider end and narrower end;
- c. a convexly-curved outer face between said wedge-shaped chock portion's wider end and narrower end, said outer face projecting in a direction opposed from said inner face, wherein said convexly-curved outer face of said first chock portion is generally parallel to said first chock portion's planar inner face at said wider end, and wherein a tangent to said convexly-curved outer face at said narrower end is angled at approximately 40 degrees away from said first chock portion's planar inner face;
- d. a second chock portion, having a generally planar inner face and an apex projecting in a direction opposed from said planar inner face;
- and,
- e. means for causing said planar inner face of said second chock portion to lie flush against said planar inner face of said first chock portion.
Dependencies are inferred from the claim text.