Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1982-11-12
1984-10-02
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318 9, 318 54, 318280, 269323, 378 17, 378209, G05B 1928, H01J 3720
Patent
active
044750722
ABSTRACT:
An X-ray table having an elevator mounted on a base for vertical movement, an intermediate support mounted on the elevator for moving longitudinally, and a carriage with a patient cradle on it for moving longitudinally on the support. A pair of gas springs mounted at the forward end of the table provides a constant upward force to compensate for weight of the elevator and the cantilevered load which is exerted as the patient cradle is extended in the longitudinal direction. There are individual servomotors for driving the support and the cradle. The intermediate support drive includes a drive bar and switch assemblies for sensing any force of more than 25 lbs., for example, exerted on the patient or patient cradle and for disengaging the servodrives in response thereto. The cradle drive incorporates a zero-backlash longitudinal friction drive which includes a harmonic drive unit to achieve accurate positioning of the patient. An encoder is driven by a closed-loop cable attached to the patient cradle to accurately indicate its position and speed even though there is a two-stage drive.
REFERENCES:
patent: 3805080 (1974-04-01), Yager et al.
patent: 3806109 (1974-04-01), Weber et al.
patent: 3822875 (1974-07-01), Schmedemann
patent: 3868103 (1975-02-01), Pageot et al.
patent: 4013019 (1977-03-01), Horsey
patent: 4112303 (1978-09-01), Brandt
patent: 4115695 (1978-09-01), Kelman
patent: 4144455 (1979-03-01), Lutz
patent: 4197464 (1980-04-01), Amor
patent: 4392096 (1983-07-01), Grajewski et al.
Brandt Richard T.
Kandler James J.
Schwehr Gregory D.
Dobeck B.
General Electric Company
Gerasimow Alexander M.
Stoner Douglas E.
LandOfFree
Patient-positioning X-ray table does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Patient-positioning X-ray table, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Patient-positioning X-ray table will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-528357