Automatic friction shoe

Details Automatic friction shoe Automatic friction shoe

1992-09-24

1993-05-04

Kannan, Philip C.

Movable or removable closures

With means mounting closure for reciprocation

With counterbalance

49430, E05F 100

Patent

active

052070255

ABSTRACT:
A sash platform for an automatic friction shoe connects to the shoe by means of a curved arm that fits into a correspondingly curved recess molded into the shoe body. An abutment limits the insertion of the curved arm into the shoe and holds a sash support blade at an operating level, and a curved holder surface supports the platform against the downward force of a sash. The shoe connects to a spring or counterbalance element and runs frictionally in a jamb liner channel.

REFERENCES:
patent: 2796630 (1957-06-01), Haas
patent: 2933757 (1960-04-01), Almendinger
patent: 2952048 (1960-09-01), Graham
patent: 3466806 (1969-09-01), Teggelaar et al.
patent: 4078336 (1978-03-01), Prosser
patent: 4190930 (1980-03-01), Prosser
patent: 4570382 (1986-02-01), Suess
patent: 4763447 (1988-08-01), Haltof et al.
patent: 4779380 (1988-10-01), Westfall
patent: 5033235 (1991-07-01), Stark
patent: 5036622 (1991-08-01), Stark
patent: 5117586 (1992-06-01), Stark
E-Z Lift Window Channels advertisement sheet.
Caldwell Manufacturing Company engineering drawings Nos. 22R04, 22R05, and 22R06.

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