Litter support having telescoping threaded rod arrangement

Details Litter support having telescoping threaded rod arrangement Litter support having telescoping threaded rod arrangement

1992-01-03

1992-12-22

Trettel, Michael F.

Beds

Invalid bed or surgical support

Vertically movable support for whole body of user

5 11, 5 861, 254102, 254 92, A61G 700

Patent

active

051724421

ABSTRACT:
A hospital bed includes a base supported by casters, and a lift arrangement vertically movably supports a patient support section on the base. The lift arrangement includes a threaded first member secured to and projecting downwardly from the patient support section, a rotatably supported tubular second member having an internal thread which engages the threaded first member and having an external thread, 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 fixedly supported on the base, and a drive member rotatably supported on the base has an opening through which the second member extends and has a key portion which slidably engages an axially extending slot provided in the second member. In a different embodiment, the further member is itself rotatably supported on the base and has therethrough an opening through which the second member extends, the thread on the further member being an internal thread in the opening.

REFERENCES:
patent: 1565878 (1925-12-01), White
patent: 1874357 (1932-08-01), Runyan
patent: 1874772 (1932-08-01), Lucker
patent: 1906365 (1933-05-01), Burkholder
patent: 2127309 (1938-08-01), Rickard
patent: 2522759 (1950-09-01), Lindquist
patent: 3253284 (1966-05-01), St. John
patent: 4609179 (1986-09-01), Chern et al.

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