| 摘要 |
2103900 9312750 PCTABS00024 A hospital bed (10) includes a base (12) supported by casters (13), and a lift arrangement vertically movably supports a patient support section (16) on the base (12). The lift arrangement includes a threaded first member (92) secured to and projecting downwardly from the patient support section (16), a rotatably supported tubular second member (77) having an internal thread which engages the threaded first member and having an external thread (78), and a further member which is supported on the base and has a thread engaging the external thread on the tubular second member. In one embodiment, the further member is a nut (37) fixedly supported on the base (12), and a drive member (71) rotatably supported on the base has an opening through which the second member (77) extends and has a key portion (82) which slidably engages an axially extending slot (81) provided in the second member (77). In a different embodiment, the further member (171) is itself rotatably supported on the base (12) and has therethrough an opening (172) through which the second member (77) extends, the thread on the further member (171) being an internal thread in the opening.
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