US PATENT SUBCLASS 248 / 571
.~ Constant thrust

Current as of: June, 1999
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248 /   HD   SUPPORTS

560  DF  RESILIENT SUPPORT {16}
571.~ Constant thrust {1}
572  DF  .~.~> Variable effective diameter pulley, e.g., fusee, etc.

DEFINITION

Classification: 248/571

Constant thrust:

(under subclass 560) Structure comprising means for exerting a constant supporting force on the supported load regardless of a change of position of the load within specified limits.