Safety brake with retardation-dependent braking force
AssigneeInventio AG
InventorStefan Hugel
Life of this patent
Estimating the term…
Abstract
A safety brake for braking a load receiving portion of an elevator has at least one brake wedge that penetrates a gap between a resiliently supported pressure body and a guide rail for the load receiving portion of the elevator and thereby generates a braking force. A stroke limiting device limits the penetration stroke of the brake wedge and controls the braking force in dependence on the retardation value of the load receiving portion of the elevator.
Claims15
A safety brake, generating a retardation-dependent braking force, for braking a load receiving means of an elevator, which safety brake is triggered by an elevator speed limiter in the case of excess speed of the load receiving means, comprising:
- a housing having a gap formed therein for receiving a guide rail, at least one brake wedge movable in said gap, a pressure body resiliently supported in said housing, and a stroke limiting device coupled to said at least one brake wedge wherein when said housing is attached to the load receiving means and receives an associated guide rail in said gap and when the elevator speed limiter moves said at least one brake wedge into contact with said pressure body and the guide rail to generate a braking force on the load receiving means, said stroke limiting device limits a penetration stroke of said at least one brake wedge in said gap in dependence on a retardation value of the load receiving means thereby controlling said braking force.
A safety brake, generating a retardation-dependent braking force, for braking a load receiving means of an elevator, which safety brake is triggered by an elevator speed limiter in the case of excess speed of the lead receiving means, comprising:
- a housing having a gap formed therein for receiving a guide rail, a pair of brake wedges movable in said gap, a pair of pressure bodies resiliently supported in said housing, and a stroke limiting device coupled to said brake wedges wherein when said housing is attached to the load receiving means and receives an associated guide rail in said gap between said brake wedges and when the elevator speed limiter moves said brake wedges into contact with said pressure bodies and the guide rail to generate a braking force on the load receiving means, said stroke limiting device limits a penetration stroke of each of said brake wedges in said gap in dependence on a retardation value of the load receiving means thereby controlling said braking force.
A safety brake, generating a retardation-dependent braking force, for braking a load receiving means of an elevator, which safety brake is triggered by an elevator speed limiter in the case of excess speed of the load receiving means, comprising:
- a housing having a gap formed therein for receiving a guide rail;
- at least a pair of brake wedges movable in said gap;
- a pressure body resiliently supported in said housing;
- a stroke limiting hydraulic system coupled to said at least one brake wedge;
- and
- a retardation sensor sensing the retardation value of the load receiving means, said stroke limiting hydraulic system being connected to said retardation sensor wherein when said housing is attached to the load receiving means and receives an associated guide rail in said gap and when the elevator speed limiter moves said at least one brake wedge into contact with said pressure body and the guide rail to generate a braking force on the load receiving means, said stroke limiting device limits a penetration stroke of said at least one brake wedge in said gap in dependence on a retardation value of the load receiving means thereby controlling said braking force.
Dependencies are inferred from the claim text.