Ascending/descending structure

Details Ascending/descending structure Ascending/descending structure

1996-01-06

1997-06-24

Luong, Vinh T.

Machine element or mechanism

Control lever and linkage systems

Elements

745947, 74600, G05G 506

Patent

active

056408862

ABSTRACT:
An ascending/descending structure including an engaging strip, a mating board, an engaging button, a U-shaped block, a receiving member and an ascending/descending bar. The ascending/descending bar is a rectangular hollow member formed with multiple pairs of opposite inner arch dents spaced by such a distance as to snugly receive the bottom end of the engaging button. The ascending/descending bar can be smoothly pulled upward and located for adjusting the height without slippage or loosening. When it is desired to push the ascending/descending bar downward, the same is first pulled upward to the top and a U-shaped block presses the engaging button and disengages the engaging button from the arch dents of the ascending/descending bar, permitting the same to be further pushed downward to the bottom,

REFERENCES:
patent: 2641249 (1953-06-01), Brockman
patent: 2723132 (1955-11-01), Oberwegner
patent: 3420203 (1969-01-01), Ambrosh
patent: 4225130 (1980-09-01), Zimmerman
patent: 4648287 (1987-03-01), Preskitt
patent: 4850245 (1989-07-01), Feamster et al.
patent: 4867441 (1989-09-01), Blakeman
patent: 4973046 (1990-11-01), Maxwell
patent: 5161430 (1992-11-01), Febey

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