Lock shoe system

Details Lock shoe system Lock shoe system

2005-05-17

2005-05-17

Redman, Jerry (Department: 3634)

Movable or removable closures

Mounted for optional movements

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

C049S447000

Reexamination Certificate

active

06892494

ABSTRACT:
A window balance shoe includes a downward depending pivoted arm that locks the height of the shoe on the jamb by catching in an opening in the jamb wall, or rotates out of the opening in the jamb wall and extends in a curved arm having a radius from the arm's pivot, through a hole that is through a horizontal platform on the shoe and through a hole in an arm supported by the platform, that pivots on and supports a bracket that is attached to the sash.

REFERENCES:
patent: 2796630 (1957-06-01), Haas
patent: 3197819 (1965-08-01), Trout
patent: 3280511 (1966-10-01), Johnson
patent: 4799333 (1989-01-01), Westfall et al.
patent: 4885871 (1989-12-01), Westfall et al.
patent: 5027557 (1991-07-01), May
patent: 5189838 (1993-03-01), Westfall
patent: 5231795 (1993-08-01), Westfall
patent: 5542212 (1996-08-01), Erickson et al.
patent: 5572828 (1996-11-01), Westfall
patent: 6041475 (2000-03-01), Nidelkoff
patent: 2 229 252 (2002-04-01), None

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