US PATENT SUBCLASS 213 / 31
.~.~ Friction casings

Current as of: June, 1999
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213 /   HD   RAILWAY DRAFT APPLIANCES

7  DF  CUSHIONED {9}
22  DF  .~ Combined spring and friction {8}
31.~.~ Friction casings {1}
32 R  DF  .~.~.~> Shoes and wedges {5}

DEFINITION

Classification: 213/31

(under subclass 22) Devices wherein one of the friction elements of the device is a casing.