Powered emergency medical transporter

Details Powered emergency medical transporter Powered emergency medical transporter

2006-08-01

2011-12-06

Trettel, Michael (Department: 3673)

Beds

Invalid bed or surgical support

Vertically movable support for whole body of user

C005S011000

Reexamination Certificate

active

08069511

ABSTRACT:
A gurney includes a platform connected to a frame by two pairs of X-connected arms configured to reduce the amount of power required to raise the platform from its lowest position relative to the frame. A voltage doubling circuit is provided to approximately double the voltage applied to the motor to allow the platform to be raised and lowered relatively faster than normal. A rotating shaft in an internally threaded nut moves a cross beam to raise or lower the platform. The nut has interior bearings to reduce the friction between the shaft and the nut. A detent mechanism and a brake structure provide fail-safe locking of the platform at a plurality of heights.

REFERENCES:
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patent: 6915538 (2005-07-01), Treon
“Smoothing” by Tim Surtell as archived by archive.org on Aug. 9, 2003. See http://web.archive.org/web/20030809235504/http://www.eleinmec.com/article.asp?19.
Catalog No. 94: Ball Screws, Acme Screws, Actuators, Linear Guides, Bearing Units, Couplings, Supernuts, Anti-Backlash Nuts.
Power Trac Design Guide, 1992 Nook Industries, Inc.

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