Below-knee prosthesis
First Claim
1. A below-knee prosthesis comprising:
- a rigid outer shaft having a closed distal end; and
a flexible inner shaft which is removably fitted in the outer shaft, the inner shaft having a closed distal end and an inflatable air chamber;
wherein the inner shaft can be rolled over a stump of a prosthesis user and which is configured to completely surround the stump and bear against it;
wherein the air chamber of the inner shaft is configured to completely surround the distal end of the stump and extends only over a small partial length of the inner shaft;
wherein a connector plug is secured on the distal end of the inner shaft and communicates with the air chamber via a through-bore to permit air exchange;
wherein the distal end of the outer shaft includes an insertion opening that receives the connector plug in a detachable manner for repeated removal and insertion of the inner shaft into the outer shaft; and
wherein a flexible tube communicates with the insertion opening and an end of the tube, guided to the outside of the outer shaft, is connected to an exhaust valve and a pump to deflate and inflate the air chamber.
1 Assignment
0 Petitions
Accused Products
Abstract
A below-knee prosthesis with a rigid, bowl-shaped outer shaft having a closed distal end, and with a flexible inner shaft which is fitted therein in a removable manner and which likewise has a closed distal end and also an air chamber which can be inflated via a valve. To improve the wearing comfort a) the inner shaft is designed as a soft silicone shaft which can be rolled over the stump of the prosthesis user and which completely surrounds the stump and bears against it; b) the air chamber of the inner shaft completely surrounds the distal end of the stump and extends only over a small partial length of the inner shaft; c) a connector plug is secured on the distal end of the inner shaft and communicates with the air chamber via a through-bore to permit air exchange; d) an insertion opening adapted to the connector plug and receiving it in a detachable manner is provided in the distal end of the outer shaft; and e) a flexible tube is connected to the insertion opening, and its tube end guided to the outside is connected to an exhaust valve and a pump.
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Citations
15 Claims
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1. A below-knee prosthesis comprising:
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a rigid outer shaft having a closed distal end; and a flexible inner shaft which is removably fitted in the outer shaft, the inner shaft having a closed distal end and an inflatable air chamber; wherein the inner shaft can be rolled over a stump of a prosthesis user and which is configured to completely surround the stump and bear against it; wherein the air chamber of the inner shaft is configured to completely surround the distal end of the stump and extends only over a small partial length of the inner shaft; wherein a connector plug is secured on the distal end of the inner shaft and communicates with the air chamber via a through-bore to permit air exchange; wherein the distal end of the outer shaft includes an insertion opening that receives the connector plug in a detachable manner for repeated removal and insertion of the inner shaft into the outer shaft; and wherein a flexible tube communicates with the insertion opening and an end of the tube, guided to the outside of the outer shaft, is connected to an exhaust valve and a pump to deflate and inflate the air chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification