Concrete Anchor

• US 20140263903A1
• Filed: 03/14/2013
• Published: 09/18/2014
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Meyer Ostrobrod
• Original Assignee: Meyer Ostrobrod
• Inventors: Ostrobrod, Meyer
• Granted Patent: US 9,163,651 B2
• Time in Patent Office: Days
• US Class Current: 248/222.12
• CPC Class Codes: A62B 35/0006 Harnesses; Accessories therefor
• CPC Class Codes: A62B 35/0068 Anchors
• CPC Class Codes: E04G 21/3204 against falling down
• CPC Class Codes: E04G 21/3276 Arrangements on buildings for connecting safety-lines fastening devices for devices for lowering persons from buildings A62B1/04
• CPC Class Codes: E04G 21/329 with measures for dampening the fall
• CPC Class Codes: F16B 13/045 having axially compressing parts allowing the clamping of an object tightly to the wall
• CPC Class Codes: F16B 13/08 with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
• CPC Class Codes: F16B 13/0816 with a wedging drive-pin
• CPC Class Codes: F16B 13/0825 with a locking element, e.g. sleeve, ring or key co-operating with a cammed or eccentrical surface of the dowel body
• CPC Class Codes: F16B 13/0833 with segments or fingers expanding or tilting into an undercut hole F16B13/0858 takes precedence
• CPC Class Codes: F16B 13/0858 with an expansible sleeve or dowel body driven against a tapered or spherical expander plug F16B13/004 takes precedence
• CPC Class Codes: F16B 13/0883 with split rings or wire between the threads of the dowel body or in grooves near a conical surface F16B13/0825 takes precedence
• CPC Class Codes: F16B 13/0891 with a locking element, e.g. wedge, key or ball moving along an inclined surface of the dowel body F16B13/0816, F16B13/0825, F16B13/0883 take precedence
• CPC Class Codes: F16B 13/10 with separate gripping parts moved into their final position in relation to the body of the device by a separate operation F16B13/06 takes precedence
• CPC Class Codes: F16B 21/165 with balls or rollers for connections of rods or tubes engaged telescopically F16B7/1409
• CPC Class Codes: F16B 7/025 with the expansion of an element inside the tubes due to axial movement towards a wedge or conical element for rods or tubes telescopically engaged F16B7/1463
• CPC Class Codes: F16B 7/1409 with balls or rollers urged by an axial displacement of a wedge or a conical member
• CPC Class Codes: F16B 7/1463 with the expansion of an element inside the outer telescoping member due to the axial movement towards a wedge or a conical member

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.

Claims

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, 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.

2. The concrete anchor as claimed in claim 1 including a visual marker carried by said rod, said visual marker normally lying within said housing but being visible from outside of said housing if said rod has moved up by a predetermined amount.

3. The concrete anchor as claimed in claim 1 including a second set of openings formed in said outer wall of said housing, said second openings being in axial alignment with each other but being angularly spaced from each other, said second openings being axially spaced from said first set of openings and a second set of hard metal balls associated with said second set of openings with one ball being positioned within each of said second openings.

4. The concrete anchor as claimed in claim 3 including a second cone within said housing, said second cone being connected to said rod and being arranged to move said second set of balls outwardly as said rod is moved upwardly.

5. The concrete anchor as claimed in claim 4 wherein said second cone is axially spaced from said first cone.

6. The concrete anchor as claimed in claim 5 including a including a visual marker carried by said rod, said visual marker normally lying within said housing but being visible from outside of said housing if said rod has moved up by a predetermined amount.

7. The concrete anchor as claimed in claim 5 wherein said first and second cones are connected together by a screw thread.

8. The concrete anchor as claimed in claim 5 wherein said rod is connected to one of said first and second cones by a screw thread.

9. The concrete anchor as claimed in claim 3 wherein said openings in said second set of openings are radially offset from said openings in said first set of openings.