Drive for an orthosis or a prosthesis
First Claim
1. A limb rehabilitation device comprising a stationary part and a part movably mounted on the stationary part, a drive unit mounted on the stationary part and a transmission for converting a rotary motion produced by the drive unit into a reciprocating linear motion for driving the movably mounted part, the transmission including a transmission member coupled to the drive unit for rotation therewith, the transmission member having two separate threads of opposite pitch, two transmission elements respectively threadedly mounted on a respective one of the threads of opposite pitch for linear movement in relation thereto, the transmission elements being non-rotatable in relation to the transmission member whereby rotation of the member causes the linear movement of the elements, and a tackle with flexible elongated motion-transmitting means having two ends facing the drive unit, a respective one of the motion-transmitting means ends being affixed to a respective one of the transmission elements and the tackle being connected to the movably mounted part for moving the same in response to the rotary motion of the drive unit.
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Accused Products
Abstract
A movable limb rehabilitation device such as an orthosis or prosthesis part is connected to a drive by a transmission which converts rotary into linear reciprocatory motion. The transmission includes a cylinder coupled to the drive for rotation therewith and having two separate threads of opposite pitch, a sleeve and a spindle respectively threadedly mounted on the threads for linear movement in relation to the cylinder and non-rotatably held on the cylinder whereby rotation of the cylinder by the drive causes the linear movement of the sleeve and spindle, and a tackle with a cable or chain having two ends facing the drive, the ends being respectively affixed to the sleeve and spindle and the tackle being connected to the movable orthosis or prosthesis part for moving the same in response to the rotary motion of the drive.
102 Citations
14 Claims
- 1. A limb rehabilitation device comprising a stationary part and a part movably mounted on the stationary part, a drive unit mounted on the stationary part and a transmission for converting a rotary motion produced by the drive unit into a reciprocating linear motion for driving the movably mounted part, the transmission including a transmission member coupled to the drive unit for rotation therewith, the transmission member having two separate threads of opposite pitch, two transmission elements respectively threadedly mounted on a respective one of the threads of opposite pitch for linear movement in relation thereto, the transmission elements being non-rotatable in relation to the transmission member whereby rotation of the member causes the linear movement of the elements, and a tackle with flexible elongated motion-transmitting means having two ends facing the drive unit, a respective one of the motion-transmitting means ends being affixed to a respective one of the transmission elements and the tackle being connected to the movably mounted part for moving the same in response to the rotary motion of the drive unit.
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12. A prosthesis comprising a stationary part and a part movably mounted on the stationary part, a drive unit mounted on the stationary part and a transmission for converting a rotary motion produced by the drive unit into a reciprocating linear motion for driving the movably mounted part, the transmission including a transmission member coupled to the drive unit for rotation therewith, the transmission member having two separate threads of opposite pitch, two transmission elements respectively threadedly mounted on a respective one of the threads of opposite pitch for linear movement in relation thereto, the transmission elements being non-rotatable in relation to the transmission member whereby rotation of the member causes the linear movement of the elements, a tackle with flexible elongated motion-transmitting means having two ends facing the drive unit, a respective one of the motion-transmitting means ends being affixed to a respective one of the transmission elements and the tackle being connected to the movably mounted prosthesis part for moving the same in response to the rotary motion of the drive unit, a drive connection for the movably mounted prosthesis part and a pulley over which the flexible elongated motion-transmitting means is trained, the movably mounted prosthesis part and the pulley being detachably mounted on the drive connection, guide rollers for guiding the flexible elongated motion-transmitting means to the pulley.
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13. A prosthesis comprising a stationary part and a part movably mounted on the stationary part, a drive unit mounted on the stationary part and a transmission for converting a rotary motion produced by the drive unit into a reciprocating linear motion for driving the movably mounted part, the transmission including a transmission member coupled to the drive unit for rotation therewith, the transmission member having two separate threads of opposite pitch, two transmission elements respectively threadedly mounted on a respective one of the threads of opposite pitch for linear movement in relation thereto, the transmission elements being non-rotatable in relation to the transmission member whereby rotation of the member causes the linear movement of the elements, a tackle with flexible elongated motion-transmitting means having two ends facing the drive unit, a respective one of the motion-transmitting means ends being affixed to a respective one of the transmission elements and the tackle being connected to the movably mounted prosthesis part for moving the same in response to the rotary motion of the drive unit, drive connection for the movably mounted prosthesis part, a bevel gearing comprising a driving and a driven bevel gear, and a pulley over which the flexible motion-transmitting means is trained, the driving bevel gear being mounted on the pulley for rotation therewith, and the driven bevel gear and the movably mounted prosthesis part being mounted on the drive connection.
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14. A prosthesis comprising a stationary part and a part movably mounted on the stationary part, a drive unit mounted on the stationary part and a transmission for converting a rotary motion produced by the drive unit into a reciprocating linear motion for driving the movably mounted part, the transmission including a transmission member coupled to the drive unit for rotation therewith, the transmission member having two separate threads of opposite pitch, two transmission elements respectively threadedly mounted on a respective one of the threads of opposite pitch for linear movement in relation thereto, the transmission elements being non-rotatable in relation to the transmission member whereby rotation of the member causes the linear movement of the elements, a tackle with flexible elongated motion-transmitting means having two ends facing the drive unit, a respective one of the motion-transmitting means ends being affixed to a respective one of the transmission elements and the tackle being connected to the movably mounted prosthesis part for moving the same in response to the rotary motion of the drive unit, an end portion of the flexible elongated motion-transmitting means opposite the ends facing the drive unit being attached to different sides of the movably mounted prosthesis part for direct movement thereof in response to the movement of the transmitting means.
Specification