Adjustable articulated bed with tiltable head portion

Details Adjustable articulated bed with tiltable head portion Adjustable articulated bed with tiltable head portion

1995-05-11

1997-06-24

Meyers, Steven N.

Beds

Invalid bed or surgical support

Sectional user supporting surface

5617, A61G 700

Patent

active

056407300

ABSTRACT:
An adjustable articulated bed having a back support section, a head rest section, an angled lifting lever, and a crank assembly operatively connecting the bed motor to the lifting lever. A slidable pin-and-slot arrangement connects the head end of the lever to the head rest section. As the lever is pivoted it first tilts the head rest section up relative to the (horizontal) back support section to a relative tilt position. Continued pivoting of the lever causes it to engage, lift and pivot the back support section up about the lifting-lever pivot axis. The head rest section, while maintaining the relative tilt position, is pivoted up with it. A polyfoam foundation affixed to the tops of both the back support and head rest sections tends to drag or lift the back support section up as the head rest section is pivoted up. A spring connected between the back support section and the crank assembly is provided to resist this lifting force, but not prevent the back support section from being lifted with the head rest section in its relative tilt position. Should a downward force be exerted at the end of the head rest section when horizontal (which force can be simply the weight of that section), a stop finger pivotal with the head rest section engages generally against the back support section to block downward pivoting of the head rest section. A bumper on a frame cross member provides a resilient stop for the downward travel of the lifting lever resulting from a downward force on or of the head rest section.

REFERENCES:
patent: D255402 (1980-06-01), Lundgren
patent: 4258445 (1981-03-01), Zur
patent: 4406027 (1983-09-01), Bourch
patent: 4527298 (1985-07-01), Moulton
patent: 5022388 (1991-06-01), Harter

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