Tilt sash lock shoe system

Details Tilt sash lock shoe system Tilt sash lock shoe system

1992-06-10

1993-03-02

Kannan, Philip C.

Movable or removable closures

Mounted for optional movements

Pivot mounted on sliding member; e.g., slide-stile

49446, 49453, E05D 1522, E05D 1312

Patent

active

051898381

ABSTRACT:
A counterbalance shoe of a tilt sash lock shoe system runs in a resin shoe channel of a jamb liner and locks against a rib extending into the shoe channel so that the rib is backed up by a surface of the shoe. A locking element carried by the shoe is counterbalanced into a locked position in which a biting edge of the lock element bites into a front side of the rib. A non-circular sash pin carried by a sash and supported by the shoe at the bottom of an open top slot in the shoe engages and separates confronting surfaces of the shoe and the locking element. The pin is configured for separating the confronting surfaces by enough to hold the locking element out of locked position when the sash is untilted and for reducing the separation of the confronting surfaces to move the locking element into locked position when the sash tilts.

REFERENCES:
patent: 3197819 (1965-08-01), Trout
patent: 3233278 (1966-02-01), Lundgren
patent: 3524282 (1970-08-01), Kraft et al.
patent: 3797168 (1974-03-01), Trout
patent: 4271631 (1981-06-01), Trout
patent: 4799333 (1989-01-01), Westfall et al.
patent: 4885871 (1989-12-01), Westfall et al.
patent: 4914861 (1990-04-01), May
patent: 4922657 (1990-05-01), Foss

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