Edward Dorma - Sarasota FL
Industrial Door Company, Inc. - Coon Rapids MN
160191, 160318, 2423751, 185 37, 267155, 16197
An apparatus for winding a spring on a shaft, such as for counterbalancing a roll-up door, includes a housing that carries a transmission which is positionable over the shaft. The transmission is configured to be coupled via a connector to one end of the spring, while the other end of the spring is fixed to the shaft. Rotation of the transmission results in a turning of the connector and a winding and/or elongation of the spring.