Self-locking portable support structure

Details Self-locking portable support structure Self-locking portable support structure

1979-06-04

1981-03-31

Browne, William R.

Undertaking

248163, A63B 708

Patent

active

042589150

ABSTRACT:
A portable support structure is disclosed having a horizontal member and single upright supports suitably connected at each end thereof at an angle of less than 90.degree. so that the upright supports are directed inwardly. Without additional bracing, this support structure is able to withstand applied forces to the horizontal bar and exhibits a high degree of stability in use. The support is particulary suitable for ballet barres and gymnastic equipment.

REFERENCES:
patent: 714554 (1902-11-01), Augustus
patent: 2893767 (1959-07-01), Buchman
patent: 2932510 (1960-04-01), Kravitz
patent: 3201119 (1965-08-01), Fenner et al.
patent: 3384332 (1968-05-01), Fenner et al.
patent: 3384368 (1968-05-01), Fenner et al.
patent: 3430954 (1969-03-01), Massey
patent: 3561564 (1971-02-01), Russell
patent: 3653658 (1972-04-01), Robertson
patent: 3944219 (1976-03-01), Lopresti

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