Granted Patent B2

US 7,537,085 · App. 10/407,904 · Granted May 26, 2009

Assignee: Capital Safety Group Winnipeg Ltd.

Abstract

Claims (47)

1. An apparatus for use in fall restraint anchoring comprising:

a base member for mounting at a location where workers require to be restrained against falling;

a post having a bottom mounting for attachment to the base member such that the post is supported in upstanding arrangement from the base member at the location;

at least one attachment loop at an upper end of the post for connection to a fall restraint connection line of a worker;

the post comprising a plurality of coaxial cylindrical tubes, each of circular cross-section, including a outer tube and an insert tube mounted as a sliding fit inside the outer tube for sliding movement longitudinally thereof for movement from an extended operating position to a retracted position, either the outer tube or the insert tube being attached to the bottom mounting;

the outside surface of the insert tube having a groove formed longitudinally thereof extending only part way therealong so that the groove terminates at its upper end a position spaced from an upper end of the insert tube and so that the groove terminates at its lower end a position spaced from a lower end of the insert tube;

and the outer tube having a projecting element thereon at a position thereon which is fixed both angularly and axially relative thereto and which extends radially inwardly of the inside surface thereof so as to extend into the groove;

the groove and the projecting element being arranged and located so as to limit longitudinal movement of the insert tube relative to the outer tube so that the insert tube is limited to longitudinal movement only between said extended and retracted positions;

and the groove, being mounted on the inner tube, and the projecting element, being angularly fixed to the outer tube, preventing relative rotation of the outer tube and the insert tube at any point along the longitudinal movement thereof.

2. The apparatus according to claim 1 wherein the projecting element comprises a set screw.

3. The apparatus according to claim 1 wherein there is only a single groove and a single projecting element.

4. The apparatus according to claim 1 wherein the outer tube and the insert tube have holes therethrough arranged to be aligned in the extended position for receipt therethrough of a locking pin and wherein the groove and the projecting element are arranged so that the holes are property aligned for receipt of the pin when the projecting element reaches the end of the groove.

5. The apparatus according to claim 1 wherein there is provided a clamping screw mounted on the outer tube so as to move a clamping end thereof radially of the outer tube and operable to clamp against the outer surface of the insert tube.

6. The apparatus according to claim 1 wherein the damping screw is arranged on the outer tube at a position spaced 180 degrees angularly from the projecting element.

7. The apparatus according to claim 1 wherein the post includes a plurality of attachment loops at axially spaced positions on the post each arranged for rotation around the post about the axis of the post.

8. The apparatus according to claim 1 wherein there is provided a separate extension piece arranged to be mounted on an upper end of the post and extending upwardly therefrom and including a further attachment loop at its upper end.

9. The apparatus according to claim 1 wherein there is provided a second insert tube mounted as a sliding fit inside the insert tube for sliding movement longitudinally thereof for movement from an extended operating position to a retracted position; the outside surface of the second insert tube having a second groove formed longitudinally thereof extending only part way therealong so that the second groove terminates at its upper end a position spaced from an upper end of the second insert tube and so that the second groove terminates at its lower end a position spaced from a lower end of the second insert tube; and the insert tube having a second projecting element at a fixed position thereon extending radially inwardly of the inside surface thereof so as to extend into the second groove; the second groove and the second projecting element being arranged and located so as to limit movement of the second insert tube relative to the insert tube so that the tubes are prevented from relative rotational movement and so that the second insert tube is limited to movement only between said extended and retracted positions.

10. The apparatus according to claim 9 wherein the second groove is arranged at 180 degree angular spacing from the groove.

11. The apparatus according to claim 1 wherein there is provided a jib portion comprising:

a collar surrounding the upper insert tube and mounted thereon as a sliding fit so as to be slidable longitudinally of the upper insert tube and rotatable around the upper insert tube about the axis of the post;

the collar having a bottom abutment surface resting upon a top edge of the lower outer tube

a jib member mounted on the collar so as to extend outwardly from the collar to one side of the post;

the jib member being mounted on the collar for upward and downward pivotal movement about a horizontal axis;

and a tether member extending from the jib member to the attachment loop for supporting the jib member at an angle inclined upwardly and outwardly from the collar.

12. The apparatus according to claim 11 wherein the collar includes two semi-cylindrical collar parts connected by a hinge on one side of the post and clamped at abutment surfaces on an opposed side of the post.

13. The apparatus according to claim 11 wherein the jib member includes at least one bracket for supporting a winch and a pulley at an outer end thereof over which a cable from the winch is guided to pass.

14. The apparatus according to claim 11 wherein the post includes a bottom tube, an uppermost tube and at least one intermediate tube all of which are slidable each into the next and wherein the collar surrounds the uppermost tube with its abutment surface resting against an upper edge of the intermediate tube.

15. An apparatus for use in fall restraint anchoring comprising:

a base member for mounting at a location where workers require to be restrained against falling;

a post having a bottom mounting for attachment to the base member such that the post is supported in upstanding arrangement from the base member at the location;

at least one attachment loop at an upper end of the post for connection to a fall restraint connection line of a worker;

the post comprising a plurality of coaxial cylindrical tubes, each of circular cross-section, including a outer tube and an insert tube mounted as a sliding fit inside the outer tube for sliding movement longitudinally thereof for movement from an extended operating position to a retracted position, either the outer tube or the insert tube being attached to the bottom mounting;

the outside surface of the insert tube having a groove formed longitudinally thereof extending only part way therealong so that the groove terminates at its upper end a position spaced from an upper end of the insert tube and so that the groove terminates at its lower end a position spaced from a lower end of the insert tube;

and the outer tube having a single projecting element thereon at a position thereon which is fixed both angularly and axially relative thereto and which extends radially inwardly of the inside surface thereof so as to extend into the groove;

the groove and the single projecting element being arranged and located so as to limit longitudinal movement of the insert tube relative to the outer tube so that the single projecting element is located at the upper end of the groove in the retracted position and is located at the lower end of the groove in the extended position such that the insert tube is limited to longitudinal movement only between said extended and retracted positions;

and the groove, being mounted on the inner tube, and the projecting element, being angularly fixed to the outer tube, preventing relative rotation of the outer tube and the insert tube at any point along the longitudinal movement thereof.

16. An apparatus for use in fall restraint anchoring comprising:

a base member for mounting at a location where workers require to be restrained against falling;

a post having a bottom mounting for attachment to the base member such that the post is supported in upstanding arrangement from the base member at the location;

at least one attachment loop at an upper end of the post for connection to a fall restraint connection line of a worker;

the post comprising a plurality of coaxial cylindrical tubes, each of circular cross-section, including a outer tube and an insert tube mounted as a sliding fit inside the outer tube for sliding movement longitudinally thereof for movement from an extended operating position to a refracted position, either the outer tube or the insert tube being attached to the bottom mounting;

the outside surface of the insert tube having a groove formed longitudinally thereof extending only part way therealong so that the groove terminates at its upper end a position spaced from an upper end of the insert tube and so that the groove terminates at its lower end a position spaced from a lower end of the insert tube;

and the outer tube having a projecting element at a fixed position thereon extending radially inwardly of the inside surface thereof so as to extend into the groove;

the groove and the projecting element being arranged and located so as to limit movement of the insert tube relative to the outer tube so that the insert tube is limited to movement only between said extended and retracted positions:

and a locking pin separate from the projecting element;

the outer tube and the insert tube each having a locking hole for receiving the locking pin therethrough when the locking holes are axially and angularly aligned;

the locking hole in the insert tube being arranged relative to the groove in the insert tube and the locking hole in the outer tube being arranged relative to the projecting element in the outer tube such that the locking holes are aligned both axially and angularly by the location of the projecting element at the end of the groove.

Assignments (11)

Continuity (1)