Patent #s 5,232,208. 5,365,638. 6,584,644. B2.
22 marked inside. 1/2" wide coil
Shoe 9/16 x 1.25" wide x 1.5 long
Window weight = 16 lbs.
Spring balance
Home Owner from Memphis, Tn
Dec 29, 2025 5:21 pm
4 user uploaded images
2 Replies
Casey from SWISCO
Jan 5, 2026 9:50 am
Hello,
Your pivot shoe resembles the 15-228 shown below. This uses the 1/2" thick Series 160 coil springs. For a 16-pound sash, I'd suggest using one S160-03 and S160-04 on each side. See the 15-150D dual covers for a two-spring setup. Thanks for posting!
Dimensions for 15-228
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