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US 7,299,898 B2Granted
Progressive safety device
AssigneeInventio AG
InventorJosef Husmann
Life of this patent
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AssigneeInventio AG
InventorJosef Husmann
Estimating the term…
A progressive safety device for an elevator includes a brake unit and an actuating unit. The brake unit has a first brake shoe with first spring assemblies and a triangular rotatable support with second and third brake shoes. The actuating unit has an electromagnetic actuator with a locking bolt, a guide bolt with a coaxial compression spring and an actuating arm. On actuation, the compression spring moves the actuating arm against a guide rail whereby grooves on the actuating arm create a frictional engagement with the guide rail turning the actuating arm about a swivel bearing and through a follower turning the support. With the turning motion and the engagement of one of the second and third brake shoes with the guide rail, the first brake shoe is guided against the guide rail and generates the necessary braking force on the guide rail.
A progressive safety device for an elevator, an elevator car and a counterweight being guided and movable on guide rails, comprising:
A method of engaging a progressive safety device for an elevator having an elevator car and a counterweight being guided and movable on guide rails, the elevator car or the counterweight being arrestable on the guide rails by a brake unit operated by an actuating unit, comprising the steps of:
Dependencies are inferred from the claim text.