Spring system for double-hung window sash

Details Spring system for double-hung window sash Spring system for double-hung window sash

1985-08-30

1987-08-11

Schran, Donald R.

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Sash balances

Spring

16193, 49446, 49429, E05F 108

Patent

active

046851755

ABSTRACT:
A window spring system for jamb liners 10 having a guide rails 11 formed in sash run regions 12 includes a spring 40, spring cover 60, spring anchorage 30, and sash platform 50 assembled within spring cover 60 that encloses spring 40 and has a closed back side 61 formed with opposite guide edges 62 shaped to slide into an interlock with guide rails 11 in jamb liner 10. An upper region 66 of the back side of spring cover 60 is cut away to receive spring anchorage 30, which is connected to an upper region of spring 40 and engages spring cover 60 and jamb liner 10 and preferably interlocks with jamb liner guide rails 11. A lower region 67 of the back side of spring cover 60 is cut away to receive sash platform 50 connected to a lower region of spring 40 and also preferably interlocking with guide rails 11 of jamb liner 10.

REFERENCES:
patent: 2722723 (1955-11-01), Mears, Jr.
patent: 2848760 (1958-08-01), Hettinger et al.
patent: 2869184 (1959-01-01), Zegers
patent: 3375610 (1968-04-01), Beasley, Jr. et al.
patent: 3466806 (1969-09-01), Teggelaar et al.
patent: 4571887 (1986-02-01), Haltof

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