Apparatus and method for continuous passive motion of the...

A - Human Necessities – 61 – H

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A61H 1/00 (2006.01) A61H 1/02 (2006.01) A61H 23/04 (2006.01)

Patent

CA 2183150

Apparatus for cycling the lower back of a person through a substantial range of lordosis. The apparatus includes a substantially static structure adjacent to the back of a person and a force applying apparatus (18) disposed between the static structure and the back of the person. The force applying apparatus includes a back engaging surface cyclically movable to increase and decrease the distance between the static structure and the back engaging surface so as to cycle the lower back through the range of lordosis. A transducer (54) has an output responsive to the force between the back engaging surface and the lower back and the output of the transducer is utilized by the force applying apparatus to control the force applied to the back. Timing circuitry (24) provides a force increasing period to increase the force applied to the back up to a preselected maximum and a force decreasing period to decrease the force on the back. A period of substantially constant force may be provided between the force increasing period and the force decreasing period.

La présente invention concerne un appareil pour activer la flexion de la partie du bas du dos humain sur toute une plage de lordoses. Cet appareil comprend une structure essentiellement statique d'une adjacente au dos d'une personne et un applicateur (18) de force, placé entre la structure statique et le dos de la personne. L'applicateur de force comprend une surface contre laquelle le dos prend appui, laquelle peut se mouvoir selon un cycle d'accroissement et de réduction de la distance entre la structure statique et la surface d'appui, de manière à activer la flexion du dos sur toute une plage de lordoses. Le signal de sortie du capteur (54) varie en fonction de la force appliquée entre la surface d'appui et la région lombaire, et l'applicateur de force utilise ce signal pour réguler la force exercée sur le dos. Un circuit à minuterie (24) assure, d'une part, une période d'intensification de la force pour accroître la pression exercée sur le dos jusqu'à un maximum sélectionné et, d'autre part, une période de réduction de la force pour diminuer la pression exercée sur le dos. Une période à force constante peut être prévue entre la période à force croissante et la période à force décroissante.

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