Window apparatus

Details Window apparatus Window apparatus

1984-01-26

1985-06-11

Kannan, Philip C.

Movable or removable closures

Mounted for optional movements

Pivoted closure within framework of double hung sash

49176, E05D 1522

Patent

active

045219915

ABSTRACT:
A window apparatus includes a jamb assembly and a pair of window frame assemblies which are capable of sliding relative to the jamb assembly for the purpose of opening and closing and also tilting inwardly to facilitate cleaning. Locking members are provided on the upper corners of each of the window frames. The locking members are lodged in slots formed in the window frames and project beyond the window frames to engage the jamb assembly and prevent tilting of the window frames. The locking members have a relatively low level of stress when the window apparatus is subjected to wind loads, thereby enabling the window apparatus to withstand relatively high wind loads encountered on the upper floors of large buildings.

REFERENCES:
patent: 1474521 (1923-11-01), Folgert
patent: 3080950 (1963-03-01), Greene
patent: 3335523 (1967-08-01), Isler et al.
patent: 3473263 (1969-10-01), Osten, Sr.
patent: 4356667 (1982-11-01), Malachowski

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