Concrete Anchor
First Claim
1. A concrete anchor for securing the lanyard of a workman'"'"'s harness to a fixed position on a concrete surface wherein said concrete surface has a cylindrically shaped bore formed therein, said anchor comprising:
- a substantially cylindrically shaped housing having a substantially cylindrically shaped outer wall and a substantially hollow interior, said housing having a length defined by a lower end and an upper end, the outer dimensions of said housing being such as to fit within said bore in said concrete surface;
a first set of openings in said outer wall, said first set of openings being angularly spaced from each other but being located the same axial distance from said lower end of said housing;
a first set of hard metal balls within said hollow interior of said housing, the number of balls being equal to the number of said first set of openings with one ball associated with each opening, the diameter of each ball being slightly greater than the size of said openings whereby a portion of each ball can pass through each opening but the entire ball can not pass therethrough;
a first cone within said housing, said first cone being in contact with said first set of balls so as to be capable of moving them radially outwardly, said first cone being vertically moveable between a lower position whereby said first balls lie substantially within said housing and a plurality of vertical positions wherein said balls are forced radially outwardly so as to extend into said first set of openings;
biasing means within said housing biasing said cone upwardly to bias said balls outwardly;
a rod connected to the top of said first cone and extending upwardly through and out of said upper end of said cylinder, anda loop at the upper end of said rod to which said lanyard can be attached, whereby if a sufficient upward force is applied to said loop, said first cone is moved upwardly to force said first set of balls into said first openings.
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Accused Products
Abstract
A concrete anchor for securing the lanyard of a workman'"'"'s harness to a fixed position on a concrete surface includes a cylindrical housing having an outer wall with openings therein and a rod that extends above the housing to which a harness can be attached. Hard metal balls within the housing are associated with each opening and are dimensioned so that a portion of each ball can pass through each opening but the entire ball can not pass therethrough. A pair of cones within the housing move the balls radially outwardly as the cones are moved upwardly by the rod which is spring biased upwardly. A visual marker carried by the rod normally lies within the housing but is visible from outside of the housing if said rod has moved up by a predetermined amount. This gives an indication that the anchor has been used.
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Citations
9 Claims
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1. A concrete anchor for securing the lanyard of a workman'"'"'s harness to a fixed position on a concrete surface wherein said concrete surface has a cylindrically shaped bore formed therein, said anchor comprising:
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a substantially cylindrically shaped housing having a substantially cylindrically shaped outer wall and a substantially hollow interior, said housing having a length defined by a lower end and an upper end, the outer dimensions of said housing being such as to fit within said bore in said concrete surface; a first set of openings in said outer wall, said first set of openings being angularly spaced from each other but being located the same axial distance from said lower end of said housing; a first set of hard metal balls within said hollow interior of said housing, the number of balls being equal to the number of said first set of openings with one ball associated with each opening, the diameter of each ball being slightly greater than the size of said openings whereby a portion of each ball can pass through each opening but the entire ball can not pass therethrough; a first cone within said housing, said first cone being in contact with said first set of balls so as to be capable of moving them radially outwardly, said first cone being vertically moveable between a lower position whereby said first balls lie substantially within said housing and a plurality of vertical positions wherein said balls are forced radially outwardly so as to extend into said first set of openings; biasing means within said housing biasing said cone upwardly to bias said balls outwardly; a rod connected to the top of said first cone and extending upwardly through and out of said upper end of said cylinder, and a loop at the upper end of said rod to which said lanyard can be attached, whereby if a sufficient upward force is applied to said loop, said first cone is moved upwardly to force said first set of balls into said first openings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification