Apparatus for winding a spring
AssigneeIndustrial Door Co., Inc.
InventorEdward Dorma
Life of this patent
Estimating the term…
Abstract
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.
Claims9
An apparatus for applying a torsion force to a spring on a shaft, wherein a first end of the spring is secured to the shaft, the apparatus comprising:
- a housing mountable to a structure adjacent to the shaft;
- a transmission rotatably mounted within the housing and configured for positioning coaxially around the shaft;
- and
- a connector coupled to the transmission and configured for positioning coaxially around the shaft, the connector further configured for connection to a second end of the spring on the shaft, wherein the connector comprises:
- a tubular member having a first tubular section rotatably connected to the transmission and a second tubular section extending from the housing, the second tubular section having an outer surface configured with external threads;
- and
- a nut having internal threads mateable with the external threads of the second tubular section, the nut configured for connection to the second end of the spring.
An apparatus for applying a torsion force to a spring on a shaft, wherein a first end of the spring is secured to the shaft, the apparatus comprising:
- a housing mountable to a structure adjacent to the shaft;
- metal tube capable of being positioned coaxially over the shaft, the metal tube comprising a first tubular section rotatably mounted within the housing, and a second tubular section extending from the housing, the second tubular section configured with external threads;
- a wheel gear secured to the first tubular section of the metal tube;
- a worm gear engaging the wheel gear, the worm gear having a head external to the housing for turning the worm gear;
- and
- a connector configured for threading on the second tubular section and for a connection of a second end of the spring on the shaft.
Dependencies are inferred from the claim text.