Construction kit for a spring-driven cable drum
AssigneeIpalco B.V.
InventorChristoph Gieseke
Life of this patent
Estimating the term…
Abstract
A construction kit for a spring-driven cable drum includes a pre-assembled drum core, the housing of which constitutes a winding surface for the cable and containing at least one spiral spring and at least one spring anchor hub. The pre-assembled drum core is provided with an axle channel passing right through it but no axle. The spring anchor hub is maintained to all intents and purposes coaxial with this axle channel by the spiral springs. The construction kit further includes a separate axle which can be inserted from either side into the axle channel of the pre-assembled drum core, insertion of the axle into the axle channel establishing a form-fit rotary coupling between the spring anchor hub and the axle.
Claims15
1-14. (canceled)
A construction kit for a spring-driven cable drum, comprising:
- a pre-assembled drum core having a housing which forms a winding surface for the cable and which contains at least one spiral spring and at least one spring anchor hub, said pre-assembled drum core having an axle channel passing right through it with no axle, and said spring anchor hub being held in a substantially axial way within said axle channel by said spiral spring;
- and
- a separate axle which can be axially inserted into said axle channel from either side of said pre-assembled drum core, wherein insertion of said axle into said axle channel establishes in either case a form-fit rotary coupling between said spring anchor hub and said separate axle.
Dependencies are inferred from the claim text.