Locking and lifting mechanism for safety fence support post
First Claim
1. A support post for a safety fence assembly, the post havinga floor engaging end, the floor engaging end having a number of claws, each claw having a number of sharp penetrating points for engagement with a supporting surface,a shaft coupled at one end to said floor engaging end and having a free end which is threaded along at least a portion of its length,a first longitudinally extending telescoping tube having an internal nut for threaded engagement with said shaft,a second longitudinally extending telescoping tube adapted for sliding telescoping engagement with said first telescoping tube;
- a ceiling engaging end coupled to said second telescoping tube; and
an over-centre locking lever assembly for fixing the relative position of the first and second telescoping tubes.
4 Assignments
0 Petitions
Accused Products
Abstract
A support post for a safety fence assembly. The support post has a floor engaging end that has a number of claws, a shaft coupled at one end to the floor engaging end, a first longitudinally extending telescoping tube, a second longitudinally extending telescoping tube adapted for sliding telescoping engagement with the first telescoping tube, a ceiling engaging end, and an over-center locking lever assembly. Each of the claws has a number of sharp penetrating points for engagement with a supporting surface. The shaft has a free end which is threaded along at least a portion of its length. The first longitudinally extending telescoping tube has an internal nut for threaded engagement with the shaft. The ceiling engaging end is coupled to the second telescoping tube. The over-center locking lever assembly fixes the relative position of the first and second telescoping tubes.
63 Citations
21 Claims
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1. A support post for a safety fence assembly, the post having
a floor engaging end, the floor engaging end having a number of claws, each claw having a number of sharp penetrating points for engagement with a supporting surface, a shaft coupled at one end to said floor engaging end and having a free end which is threaded along at least a portion of its length, a first longitudinally extending telescoping tube having an internal nut for threaded engagement with said shaft, a second longitudinally extending telescoping tube adapted for sliding telescoping engagement with said first telescoping tube; -
a ceiling engaging end coupled to said second telescoping tube; and an over-centre locking lever assembly for fixing the relative position of the first and second telescoping tubes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A support post for a safety fence assembly, the post having
a floor engaging end, a shaft coupled at one end to said floor engaging end and having a free end which is threaded along at least a portion of its length, a first longitudinally extending telescoping tube having an internal nut for threaded engagement with said shaft, a second longitudinally extending telescoping tube adapted for sliding telescoping engagement with said first telescoping tube; -
a ceiling engaging end coupled to said second telescoping tube; and an over-centre locking lever assembly for fixing the relative position of the first and second telescoping tubes; wherein the over-centre locking lever assembly includes a collar slideable longitudinally over an inner one of said first and second telescoping tubes, and a lever pivotally mounted to the collar on a first pivot pin and pivotable between a release position where the collar is freely movable on said inner telescoping tube and a lock position where the lever has moved past a center line of the pivot pin parallel to the support post and the collar is tilted to grip the inner telescoping tube. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A support post for a safety fence assembly, the post having:
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a floor engaging end; a shaft coupled at one end to said floor engaging end and having a free end coupled to a first longitudinally extending telescoping tube; a second longitudinally extending telescoping tube adapted for sliding telescoping engagement with said first telescoping tube; a ceiling engaging end coupled to said second telescoping tube; and
an over-centre locking lever assembly for fixing the relative position of the first and second telescoping tubes, the over-centre locking lever assembly including a collar slideable longitudinally over an inner one of said telescoping first and second tubes, and a lever pivotally mounted to the collar on a first pivot pin and pivotable between a release position where the collar is freely movable on said inner telescoping tube and a lock position where the lever has moved past a center line of the first pivot pin parallel to the support post and the collar is tilted to grip the inner telescoping tube. - View Dependent Claims (18, 19)
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- 20. An over-centre locking lever assembly for fixing the relative position of telescoping inner and outer tubes in a support post for a safety fence assembly, the assembly including a collar slideable longitudinally over the inner one of said telescoping tubes, and a lever pivotally mounted to the collar on a first pivot pin and pivotable between a release position where the collar is freely movable on said inner telescoping tube and a lock position where the lever has moved past a center line of the pivot pin parallel to the support post, the lever being bifurcated at an inner end into a pair of leg portions that receives the first pivot pin therebetween, the over-centre locking lever assembly further including a pivot bar pivotable on a second pivot pin extending between said leg portions and positioned between the first pivot pin and an outer end of the lever, the pivot bar having a free end to engage an upper peripheral edge of an outer one of said first and second telescoping tubes so that the collar may be raised above the upper peripheral edge of the telescoping outer tube and tilted to grip an outer surface of the telescoping inner tube.
Specification