HYDRAULIC ELEVATOR SYSTEM AND METHOD

摘要

A hydraulic elevator system is operable to selectively raise and lower an elevator car. The system raises and lowers the elevator car by actuating a hydraulic jack. The system retracts a hydraulic jack that is fixed to an upper portion of the hoistway by pressurizing hydraulic fluid within the hydraulic jack via a hydraulic fluid pump. When retracting the hydraulic jack the elevator car travels upward. An accumulator usable with the system is operable to store energy during the downward travel of the elevator car for later use during the upward travel of the elevator car.

主权项

1. An elevator system for driving an elevator car within a hoistway, the elevator system comprising:
a hydraulic jack configured to drive the elevator car upward within the hoistway when the hydraulic jack retracts, and permit the elevator car to travel downward within the hoistway when the hydraulic jack extends; a hydraulic pump in fluid communication with the hydraulic jack and configured to direct hydraulic fluid to the hydraulic jack.