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US 10,093,516 B2Granted
Elevator having a braking device
AssigneesThyssenkrupp Elevator AG, thyssenkrupp AG
InventorsThomas Kuczera, Walter Hoffmann
Life of this patent
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Abstract
An elevator may include a braking device such as a safety gear system or a service brake, for instance. The braking device may include a hydraulically-acting brake for braking an elevator car of the elevator. The braking device may further include a hydraulic unit with a pump assembly, a brake cylinder assembly, and a valve assembly for ventilating the brake. Further, the hydraulic unit may be fastened to the braking device.
Claims18
An elevator including a braking device that comprises:
- a hydraulically-acting brake for braking an elevator car of the elevator;
- and
- a hydraulic unit that is fastened to the braking device and includes a pump assembly, a brake cylinder assembly, and a valve assembly for hydraulically ventilating the hydraulically-acting brake, wherein the brake cylinder assembly includes a piston that is displaceable in a cylinder and divides an interior space of the cylinder into a first chamber and a second chamber, wherein the piston is prestressed in a sprung fashion by a spring disposed in the second chamber, wherein the valve assembly includes a valve such that in a first switched state the valve hydraulically ventilates the hydraulically-acting brake,
- wherein in the first switched state of the valve the first chamber of the cylinder is connected to the pump assembly so as to deliver hydraulic oil to the first chamber of the cylinder of the brake cylinder assembly,
- wherein in a second switched state of the valve the second chamber of the cylinder is connected to the pump assembly so as to deliver hydraulic oil to the second chamber of the cylinder of the brake cylinder assembly, wherein in the second switched state of the valve both the spring and pressurized hydraulic oil in the second chamber act on the piston to activate the hydraulically-acting brake.
2 more elements
A braking device comprising:
- a base body;
- a hydraulically-acting brake;
- and
- a hydraulic unit that is fastened to the base body and comprises
- a pump assembly, and
- a brake cylinder assembly that includes a piston that is displaceable in a cylinder, wherein the piston divides an interior space of the cylinder into a first chamber and a second chamber, wherein the piston is biased by a spring disposed in the second chamber, wherein hydraulic oil disposed in the second chamber is configured to exert a force on the piston.
3 more elements
Dependencies are inferred from the claim text.