Continuous passive motion device for a hand
AssigneeJace Systems, Inc.
InventorsRobert T. Kaiser, Vero Ricci, George Telepko, Mark Covey, Berdj C. Kalustyan
Life of this patent
Estimating the term…
Abstract
A therapeutic continuous passive motion device for rehabilitating a user's hand that includes a prime mover which provides for reciprocating motion. The therapeutic passive motion device comprises first, second and third links which cause the fingers of a user's hand to be moved in a path substantially defined by an epicycloid curve. The device can be configured to flex only MCP or only DIP and PIP joints or all three sets of joints. The therapeutic passive motion device applies a perpendicular force to the fingers so as not to irritate the tissue surrounding the bones of the fingers receiving recuperative therapy.
Claims32
A therapeutic passive motion device for effecting movement of a user's hand comprising carpal, metacarpal and phalanges bones, the carpal bones forming the wrist that is connected to the forearm of the user, said passive motion device comprising:
- (a) a hollow splint assembly having a centerline and configured to be secured around at least one of a forearm and a hand of a user;
- (b) a prime mover coupled with the splint assembly and including a rotary drive output, the prime mover being supported to one side of the splint assembly so as to be located on one side of the user's hand when the splint assembly is worn by the user;
- (c) a first link coupled with the rotary drive output for rotation about a first axis extending generally transversely to the centerline of the splint assembly the first axis being displaced transversely from the rotary drive output;
- (d) a second link coupled with the first link for rotation about a second axis at least substantially parallel to and displaced transversely from the first axis, the second axis passing through the first link and the second link;
- (e) a third link coupled with the second link for rotation about a third axis at least generally parallel to and displaced transversely from each of the first and second axes, the third axis passing through the second link and the third link;
- and
- (f) a coupling extending transversely from one of the links at a point displaced transversely from each of the axes and configured to be secured with either a palm or fingers of the hand of the user.
A therapeutic passive motion device for effecting movement of a user's hand comprising carpal, metacarpal and phalanges bones, the carpal bones forming the wrist that is connected to the forearm of the user, said passive motion device comprising:
- (a) a hollow splint assembly having a centerline and configured to be secured around at least one of a forearm and a hand of a user;
- (b) a prime mover;
- (c) a first gear centered on a first axis;
- (d) a first link rotated about the first axis by the prime mover;
- (e) a second gear rotatably supported on a second axis through the first link, generally parallel with and spaced transversely from the first axis, the second gear being meshed with the first gear to rotate about the first gear on the second axis;
- (f) a third gear fixed on the second axis;
- (g) a fourth gear meshed with the third gear to rotate about a third axis generally parallel with and spaced transversely from the first and second axes;
- and
- (h) a coupling extending from one of the first link and the fourth gear at a point spaced traversely from each of the axes and configured to be secured with either a palm or fingers of the hand of the user.
A therapeutic passive motion device for effecting movement of a user's hand comprising carpal, metacarpal and phalanges bones, the carpal bones forming the wrist that is connected to the forearm of the user, said passive motion device comprising:
- (a) a hollow splint assembly having a centerline and configured to be secured around at least one of a forearm and a hand of a user;
- (b) a prime mover coupled with the splint assembly and including a rotary output member, the prime mover being supported to one side of the splint assembly so as to be located on one side of the user's hand when the splint assembly is worn by the user;
- (c) a first link coupled with the rotary output member for rotation about a first axis extending generally transversely to the centerline of the splint assembly;
- (d) a second link coupled with the first link for rotation about a second axis at least substantially parallel to and displaced transversely from the first axis;
- (e) a third link coupled with the second link for rotation about a third axis at least generally parallel to and displaced transversely from each of the first and second axes;
- (f) a hollow output member about the first transverse axis and a sensor located to sense the angular position of said first link;
- and
- (g) a transverse member adapted to be secured around the fingers of the user's hand proximal the metacarpophalangeal joints and having an upper section, said transverse member further having a control arm with a first end connected to said upper section and a second end insertable into said hollow output member at a location where said second end of said rod can be sensed by the sensor.
A therapeutic passive motion device for effecting movement of a user's hand comprising carpal, metacarpal and phalanges bones, the carpal bones forming the wrist that is connected to the forearm of the user, said passive motion device comprising:
- (a) a hollow splint assembly having a centerline and configured to be secured around at least one of a forearm and a hand of a user;
- (b) a prime mover coupled with the splint assembly and including a rotary output member, the prime mover being supported to one side of the splint assembly so as to be located on one side of the user's hand when the splint assembly is worn by the user;
- (c) a first link coupled with the rotary output member for rotation about a first axis extending generally transversely to the centerline of the splint assembly;
- (d) a second link coupled with the first link for rotation about a second axis at least substantially parallel to and displaced transversely from the first axis;
- (e) a third link coupled with the second link for rotation about a third axis at least generally parallel to and displaced transversely from each of the first and second axes, said third link having a latch;
- (f) at least one strap member releasably attached to a tip portion of at least one finger of the user's hand and having a loop member on its outer surface;
- and
- (g) a bar member having first and second end sections with the first end section insertable into said loop member and connected with said third link.
Dependencies are inferred from the claim text.