An adapter for coupling an all terrain attachment to a folding wheelchair. A crossbar includes a clamp at each end thereof for coupling between the side frames of the folding wheelchair. An extension bar is coupled at one end to the crossbar and at the other end to the all terrain attachment.
대표청구항▼
1. An adapter for coupling an all terrain wheel attachment to a folding wheelchair, the folding wheelchair having a pair of side frames, comprising: one and only one rigid crossbar having a first wheelchair connector at one end and a second wheelchair connector at the other end, each wheelchair conn
1. An adapter for coupling an all terrain wheel attachment to a folding wheelchair, the folding wheelchair having a pair of side frames, comprising: one and only one rigid crossbar having a first wheelchair connector at one end and a second wheelchair connector at the other end, each wheelchair connector configured for coupling the rigid crossbar to a respective side frame of the wheelchair; andone and only one rigid extension bar coupled at one end to a middle portion of the rigid crossbar and extending forward relative to the wheelchair, and at the other end, coupled to a shaft disposed in a horizontal plane, the shaft sized to receive a mating fork opening on an all terrain wheel attachment. 2. The adapter of claim 1, wherein the rigid crossbar has an adjustable length. 3. The adapter of claim 2, wherein the rigid crossbar includes a fixed portion and a telescoping portion that slides in and out of the fixed portion to provide the adjustable length. 4. The adapter of claim 1, wherein the first and second wheelchair connectors are end clamps. 5. The adapter of claim 4, wherein each end clamp comprises: a first half-cylinder and a second half-cylinder, each half-cylinder having a length and a pair of edges along the length;a first hinge connecting a first edge of the first half-cylinder and a first edge of the second half-cylinder such that the half-cylinders can be rotated relative to each other between an open position and a closed position;a tab extending from a second edge of the second half-cylinder, the tab having a slot;a second hinge connected to a second edge of the first half-cylinder, the second hinge having a threaded stud extending orthogonally from the second hinge and rotatable in the hinge, wherein the threaded stud is configured to mate with the slot when the first and second half-cylinders are in a closed position;a knob threaded onto the threaded stud, wherein tightening the knob onto the threaded stud secures the first and second half-cylinders in the closed position, and wherein loosening the knob from the threaded stud allows the first and second half-cylinders to be rotated to the open position. 6. The adapter of claim 5, wherein each end clamp is a mirror image of the other end clamp, the first half-cylinder of each clamp being affixed to respective ends of the crossbar. 7. The adapter of claim 1, further comprising: an extension connector configured to connect the one end of the rigid extension bar to the rigid crossbar. 8. The adapter of claim 7, wherein the extension connector is adjustable such that it can be loosened and moved to a new position on the rigid crossbar and then tightened at the new position. 9. The adapter of claim 7, wherein the extension connector is a center clamp. 10. The adapter of claim 9, the center clamp comprising: a hollow cylinder having an open seam along a length of the cylinder; andat least one fastener affixed to the cylinder proximate to the seam and configured to tighten or loosen the cylinder on the crossbar. 11. The adapter of claim 1, wherein the rigid extension bar is coupled to the rigid crossbar at a fixed angle when the rigid crossbar is coupled to the side frames of the wheelchair. 12. The adapter of claim 1, further comprising: an extension connector configured to connect the one end of the rigid extension bar to the rigid crossbar at a first angle when the rigid crossbar is coupled to the side frames of the wheelchair, wherein the extension connector is rotatable on the rigid crossbar to increase or decrease the first angle. 13. An adapter for coupling an all terrain wheel attachment to a folding wheelchair, the folding wheelchair having a pair of side frames, comprising: one and only one rigid crossbar having two end clamps, one at each end thereof, each end clamp configured for coupling the crossbar to a respective side frame of the wheelchair; andone and only one rigid extension bar having a center clamp at one end coupled to the rigid crossbar, the rigid extension bar extending forward relative to the wheelchair and having a shaft at the other end disposed in a horizontal plane and configured for receiving a mating fork opening on an all terrain wheel attachment. 14. The adapter of claim 13, wherein the rigid crossbar has an adjustable length. 15. The adapter of claim 14, wherein the rigid crossbar includes a fixed portion and a telescoping portion that slides in and out of the fixed portion to provide the adjustable length. 16. The adapter of claim 13, wherein each end clamp comprises: a first half-cylinder and a second half-cylinder, the first half-cylinder of each clamp affixed to a respective end of the rigid crossbar, each half-cylinder having a length and a pair of edges along the length;a first hinge connecting a first edge of the first half-cylinder and a first edge of the second half-cylinder such that the second half-cylinders can be rotated relative to the first half-cylinder between an open position and a closed position;a tab extending from a second edge of the second half-cylinder, the tab having a slot;a second hinge connected to a second edge of the first half-cylinder, the second hinge having a threaded stud extending orthogonally from the second hinge and rotatable in the hinge, wherein the threaded stud is configured to mate with the slot when the first and second half-cylinders are in a closed position;a knob threaded onto the threaded stud, wherein tightening the knob onto the threaded stud secures the first and second half-cylinders in the closed position, and wherein loosening the knob from the threaded stud allows the first and second half-cylinders to be rotated to the open position. 17. The adapter of claim 13, wherein the center clamp couples the rigid extension bar to the rigid crossbar at a fixed angle when the rigid crossbar is coupled to the side frames of the wheelchair. 18. The adapter of claim 13, wherein the center clamp is adjustable such that it can be loosened and either rotated about the rigid crossbar to a new position or moved to a new position on the rigid crossbar and then tightened at the new position. 19. The adapter of claim 18, the center clamp comprising: a hollow cylinder having an open seam along a length of the cylinder; andat least one fastener affixed to the cylinder proximate to the seam and configured to tighten or loosen the cylinder on the rigid crossbar. 20. An adapter for coupling an all terrain wheel attachment to a folding wheelchair, the folding wheelchair having a pair of side frames, comprising: one and only one rigid crossbar configured for coupling between the side frames of the wheelchair; andone and only one rigid extension bar coupled at one end to the rigid crossbar and coupled at the other end to a shaft disposed in a horizontal plane, the shaft sized to receive a mating fork opening on an all terrain wheel attachment.
Ordelman Hendrik J. (Bosstraat 33 NL-7161 XX Neede NLX) Temmink Gerhard (Wiedenbroeksingel 32 NL-7481 BT Haaksbergen NLX) Stokkers Herman W. H. (Vonkenkaamp 3 NL-7482 GB Haaksbergen NLX) Braam Harm (, Auxiliary frame for a wheelchair and wheelchair for use with an auxiliary frame.
Benes David M. (5108 Wildwood Wixom MI 48096) Gates Allan L. (408 S. Kinney Mt. Pleasant MI 48858) Ryan Richard (Stanwood MI), Wheelchair supporting sled.
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