Flexible or portable closure – partition – or panel – Plural and/or with rigid closure – Diverse types
Patent
1993-08-09
1994-11-15
Purol, David M.
Flexible or portable closure, partition, or panel
Plural and/or with rigid closure
Diverse types
160191, 160207, E06B 332
Patent
active
053638980
ABSTRACT:
A counterbalanced flex window wherein the sashes thereof, being joined together by a hinge, flex and fold toward each other when the window is released for opening and thereafter automatically maintain randomly adjusted open positions without the need for supplemental manually engaged incremental adjustment latch devices.
REFERENCES:
patent: 2330696 (1943-09-01), Exiner
patent: 2408739 (1946-10-01), Dawes
patent: 2771133 (1956-11-01), Haskell
patent: 4039018 (1977-08-01), De Maria
patent: 4227345 (1980-10-01), Durham
patent: 4683676 (1987-08-01), Sterner
patent: 4935987 (1990-06-01), Sterner
Learned Jr. Samuel M.
Purol David M.
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