Adjustable support legs

Claim 2

An adjustable leg for use in supporting an article freestanding comprising a bracket adapted to be secured to the article in fixed position and having a collar with a central bore, a first elongated hollow leg section slidable lengthwise through said bore of said collar to adjust the effective length of said first leg section, a second elongated leg section slidable in said first leg section, means for locking said second leg section in fixed position relative to said first leg section but releasable to permit sliding movement of said two leg sections, and releasable clamping means, separate from said locking means, carried by said collar for bearing against the outer periphery of said first leg section so as to lock said first leg section in fixed position relative to said collar, said first leg section having a radial opening positionable, with said clamping means released, in alignment with said clamping means and said clamping means being optionally actuatable so as to extend through said radial opening and bear against the outer periphery of said second leg section to lock said second leg section in fixed position relative to said collar.

Claim 3

The adjustable leg defined in claim 1, in which the clamping means includes a clamping screw threaded through the collar, turnable to bear against the outer periphery of the first leg section when its radial opening is offset from said screw, and turnable to bear against the outer periphery of the second leg section when the radial opening of the first leg section is aligned with said screw.

Claim 4

The adjustable leg defined in claim 1, including guide means for positioning the first leg section with its radial opening in alignment with the clamping screw.

Claim 5

The adjustable leg defined in claim 3, in which the guide means includes a post projecting from the first leg section and a locating slot in the collar, said post and slot being located so as to interfit by lengthwise sliding movement of the first leg section in the collar as the radial opening of the first leg section approaches alignment with the clamping means.

Claim 6

An adjustable leg for use in supporting an article freestanding comprising a first upright elongated hollow leg section, a second upright leg section fitted in said first leg section and extendable therefrom and retractable therein, means for locking said second leg section relative to said first leg section with said second leg section extended so as to prevent retraction of said second leg section but releasable so as to permit such retraction, a bracket adapted to be secured to the article in fixed position and having a collar with an upright central bore receiving said first leg section for lengthwise sliding of said first leg section in said bore, and releasable clamping means carried by said collar for bearing against the outer periphery of said first leg section so as to lock said first leg section in fixed position relative to said collar, said first leg section having a radial opening in its bottom end portion positionable, with said clamping means released, in alignment with said clamping means and said clamping means being actuatable so as to extend through said radial opening and bear against the outer periphery of said second leg section to lock both said first and second leg sections in fixed positions relative to said collar, whereby the aggregate effective length of said two leg sections can be infinitely adjusted through a first range by use of said clamping means and through a second range by use of said locking means and said clamping means.

Claim 7

An adjustable leg for use in supporting an article freestanding comprising a first upright elongated hollow leg section, a second upright leg section fitted in said first leg section and extendable therefrom and retractable therein, means for locking said second leg section relative to said first leg section with said second leg section extended so as to prevent retraction of said second leg section but releasable so as to permit such retraction, a bracket adapted to be secured to the article in fixed position and having a collar with an upright central bore receiving said first leg section for lengthwise sliding of said first leg section in said bore, and releasable clamping means carried by said collar for bearing against the outer periphery of said first leg section so as to lock said first leg section in fixed position relative to said collar, said first leg section having a radial opening in its bottom end portion positionable, with said clamping means released, in alignment with said clamping means and said clamping means being actuatable so as to extend through said radial opening and bear against the outer periphery of said second leg section to lock both said first and second leg sections in fixed positions relative to said collar, whereby the aggregate effective length of said two leg sections can be infinitely adjusted through a first range by use of said clamping means and through a second range by use of said locking means and said clamping means.