Lock for telescoping tubular leg

A lock for a telescoping support of the type including an inner channel section telescopingly slideable within an outer channel section, said lock comprising:

• a mounting bracket having a base portion and joining two parallel arms, said bracket being mounted to the outer channel section and held against sliding movement therealong by portions integral with said outer section, said bracket being retained against separation from said outer section by a camming lever pivotably mounted between said two arms for cammingly engaging the inner channel section through a window formed in the outer channel section thereby to lock said two sections against telescoping movement;
• a stop member mounted to said inner channel section and spring biased against longitudinally extending portions on the outer section during telescoping extension of said channel portions, said longitudinally extending portions being outwardly bent in the vicinity and on either side of said mounting bracket for restraining the mounting bracket against sliding movement along the outer section, said outwardly bent longitudinal portions also allowing movement of said stop member under spring bias into abutment with portions of said outer section to thereby limit further telescoping extension of said sections.

A lock for an extendable suport of the type including an inner channel section telescopingly slideable within an outer channel section, said channel sections being of U-shaped cross section, each channel section including longitudinally extending lips projecting towards each other from opposing side walls in said channel, said lock comprising:

• a U-shaped mounting bracket mounted to the outer channel section and held against sliding movement therealong by ramped lip portions adjacent to either side of said bracket, said bracket being retained against separation from said outer section by a camming lever pivotably mounted between the two arms of the bracket for cammingly engaging the inner channel section through a window defined in the outer channel section thereby to lock together said two sections against telescoping movement;
• and
• a stop member mounted to said inner section and spring biased against the longitudinally extending lips of the outer channel section during telescoping extension of the two sections, said ramped lipped portions allowing movement of said stop member under spring bias into abutment with lip portions underlying said mounting bracket to thereby limit further telescoping extension of the two channel sections.