A patient-support apparatus includes a patient-support deck coupled to first and second lift systems configured to lift the patient-support deck relative to the floor. The lift systems each include a pair of supports and a carriage coupled to the patient-support deck and suspended from the supports
A patient-support apparatus includes a patient-support deck coupled to first and second lift systems configured to lift the patient-support deck relative to the floor. The lift systems each include a pair of supports and a carriage coupled to the patient-support deck and suspended from the supports by tethers which are wound and unwound to raise and lower the patient-support deck.
대표청구항▼
The invention claimed is: 1. A patient-support apparatus comprising a plurality of supports, a first tether coupled to a first support, a second tether coupled to a second support, a patient-support platform, the patient-support platform includes a frame, a plurality of deck sections pivotable rela
The invention claimed is: 1. A patient-support apparatus comprising a plurality of supports, a first tether coupled to a first support, a second tether coupled to a second support, a patient-support platform, the patient-support platform includes a frame, a plurality of deck sections pivotable relative to the frame, a plurality of actuators each coupled to a deck section, the actuators configured to control a pivoting of the deck sections relative to the frame, and winding means for winding and unwinding the tethers to vary the height of the patient-support platform relative to the supports such that as the tethers are wound the second tether is wound upon the first tether. 2. The patient-support apparatus of claim 1, wherein the winding means is secured to the patient-support platform. 3. The patient-support apparatus of claim 2, wherein the winding means comprises a prime mover and a spool driven by the prime mover. 4. The patient-support apparatus of claim 3, wherein the prime mover comprises a motor including an output to drive the spool, the output driving a limit assembly configured to limit the operation of the motor when the patient-support platform reaches a vertical limit. 5. The patient-support apparatus of claim 4, wherein the prime mover further comprises a speed reducer interposed between the motor and the spool. 6. The patient-support apparatus of claim 1, wherein the winding means comprises a prime mover and a spool driven by the prime mover. 7. The patient-support apparatus of claim 6, wherein the prime mover comprises a motor including an output to drive the spool, the output driving a limit assembly configured to limit the operation of the motor when the patient-support platform reaches a vertical limit. 8. The patient-support apparatus of claim 7, wherein the tether comprises a stainless steel strap. 9. The patient-support apparatus of claim 1, wherein the tether comprises a stainless steel strap. 10. A lift system for a patient-support apparatus comprising first and second tethers configured to be coupled to a first portion of the patient-support apparatus, and a winder coupled to the tethers distal to the first portion, the winder configured to be coupled to a second portion of the patient-support apparatus and to rotate relative to the second portion of the patient-support apparatus to wind the first tether upon the second tether to vertically raise the second portion relative to the first portion and to unwind the first tether and the second tether to vertically lower the second portion relative to the first portion. 11. The lift system of claim 10, wherein the winder comprises a spool, a motor including an output to drive the spool, the output driving a limit assembly configured to limit the operation of the motor when the patient-support platform reaches a vertical limit. 12. The lift system of claim 11, wherein the winder further comprises a speed reducer interposed between the motor and the spool. 13. The lift system of claim 12, wherein the tethers are each a stainless steel strap. 14. A patient-support apparatus comprising a patient-support platform, the patient-support platform includes a frame and a plurality of deck sections pivotable relative to the frame, a plurality of columns configured to engage a floor, a tether coupled to each column, and a winder coupled to the patient-support platform and suspended by the tethers, the winder configured to gather the tethers such that the tethers overlie one another and release the tethers to thereby raise and lower the patient-support platform relative to the floor. 15. The patient-support apparatus of claim 14, wherein the winder is driven by a motor. 16. The patient-support apparatus of claim 14, wherein the winder comprises a spool, a motor including an output to drive the spool, the output driving a limit assembly configured to limit the operation of the motor when the patient-support platform reaches a vertical limit. 17. The patient-support apparatus of claim 16, wherein the tether comprises a first tether portion coupled to a first column and a second tether portion coupled to a second column and wherein each of the tether portions are contemporaneously gathered and released by the winder such that the patient-support platform raises and lowers along each of the first and second columns at generally the same speed. 18. The patient-support apparatus of claim 17, wherein the patient-support platform includes an outer tube coupled to the frame and configured to receive a column and a spool coupled to the outer tube, the spool configured to engage the tether and to rotate relative to the outer tube as the tether is gathered and released by the winder such that the spool guides the tether to the winder as the winder rotates. 19. A patient-support apparatus comprising a first portion, a first and second tethers coupled to a first portion of the patient-support apparatus, a second portion of the patient-support apparatus movable relative to the first portion, and a winder coupled to the each of the first and second tethers distal to the first portion, the winder supported on the second portion and rotatable relative to the second portion to wind the tethers such that the tethers overlie one another and unwind the first and second tethers to thereby move the second portion of the patient-support apparatus vertically relative to the first portion. 20. The patient-support apparatus of claim 19, wherein the winder is driven by a motor. 21. The patient-support apparatus of claim 20, wherein the tether engages a roller on the second portion, the roller configured to guide the tether as the winder gathers and releases the tether. 22. The patient-support apparatus of claim 21, wherein the tether comprises a stainless steel strap. 23. The patient-support apparatus of claim 22, wherein the winder comprises a spool and a motor driving the spool to rotate the spool about a horizontal axis, and a speed reducer interposed between the motor and the spool.
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