Electronically controlled device

Details Electronically controlled device Electronically controlled device

2006-03-07

2006-03-07

Mendez, Manuel (Department: 3763)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

Reexamination Certificate

active

07008399

ABSTRACT:
A device for injecting preparations is controlled by a sealed circuit block (10) containing integrated sensors (17, 21, 22, 23 24) which monitors selected parameters. Two pairs of integrated Hall elements (21, 23and22, 24) monitors movements relative to a sine formed magnetic field presented along the perimeter of a multipoled magnetized ring (7). The Hall elements in each pair are displaced 180° magnetically relative to each other and the two pairs of Hall elements are displaced 90° magnetically from each other. Each pair is coupled to a differential amplifier (25, 26) to provide a cosine and a sine signal, respectively. The sine signal is divided by the cosine signal to create a tangent signal as an entrance to a table showing the angle of the movement.

REFERENCES:
patent: 4838860 (1989-06-01), Groshong et al.
patent: 5221268 (1993-06-01), Barton et al.
patent: 6019745 (2000-02-01), Gray
patent: 6268722 (2001-07-01), Kogure et al.
patent: 6547755 (2003-04-01), Lippe et al.

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