Undertaking
Patent
1982-05-10
1983-09-20
Apley, Richard J.
Undertaking
A63B 100
Patent
active
044051271
ABSTRACT:
The horizontal bar includes tubular members freely telescopically interconnected having laterally extending end plates wedged-shaped and received in doorway brackets on opposite sides of the doorway. The brackets are wedged-shaped and include a passgeway narrower in width to provide a friction fit between the side edges of the plates and the lateral ends of the brackets.
REFERENCES:
patent: 3525521 (1967-08-01), Sylvester
patent: 3738650 (1973-06-01), Ossenkop et al.
Apley Richard J.
Crow Stephen R.
Gravity Guidance, Inc.
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