Wheelchair drive boost apparatuses, drive assisted wheelchairs, and wheelchair drive boost systems are disclosed. A wheelchair drive boost apparatus includes a housing, a drive wheel including a drive axis that is movable with respect to the housing, a drive lever that engages with the drive wheel t
Wheelchair drive boost apparatuses, drive assisted wheelchairs, and wheelchair drive boost systems are disclosed. A wheelchair drive boost apparatus includes a housing, a drive wheel including a drive axis that is movable with respect to the housing, a drive lever that engages with the drive wheel to cause the drive wheel to rotate, a transmission that couples the drive lever to the drive wheel, and an engager having a first position and a second position. The engager is configured to move the drive axis with respect to the housing.
대표청구항▼
1. A wheelchair drive boost apparatus comprising: a housing comprising a planar side having a slot;a drive wheel comprising a drive axis that is movable with respect to the housing and an axial shaft that is movable within the slot;a drive lever;a transmission directly coupled to the drive lever and
1. A wheelchair drive boost apparatus comprising: a housing comprising a planar side having a slot;a drive wheel comprising a drive axis that is movable with respect to the housing and an axial shaft that is movable within the slot;a drive lever;a transmission directly coupled to the drive lever and to the drive wheel such that the drive lever engages the drive wheel; andan engager having a first position and a second position, wherein the engager is configured to move the drive axis with respect to the housing and wherein the axial shaft moves within the slot in response to movement of the engager,wherein a manual force exerted on the drive lever generates torque that is delivered to the transmission via the direct coupling of the drive lever and the transmission such that the transmission multiplies the torque and delivers the multiplied torque to the drive wheel. 2. The wheelchair drive boost apparatus of claim 1, wherein the wheelchair drive boost apparatus is coupled to a wheelchair. 3. The wheelchair drive boost apparatus of claim 1, wherein the engager in the first position disposes the drive wheel in contact with a wheel of a wheelchair. 4. The wheelchair drive boost apparatus of claim 1, wherein the engager in the second position disposes the drive wheel out of contact with a wheel of a wheelchair. 5. The wheelchair drive boost apparatus of claim 1, wherein the engager comprises an engage lever and a linkage that couples the engager to the drive wheel. 6. The wheelchair drive boost apparatus of claim 5, wherein the linkage is a four-bar linkage and the engage lever, when located in the first position, is at or near a dead point condition. 7. The wheelchair drive boost apparatus of claim 1, wherein the transmission comprises a gear train disposed between the drive lever and the drive wheel. 8. The wheelchair drive boost apparatus of claim 7, wherein the gear train comprises a first gear spur concentric with the drive lever and a second gear spur concentric with the drive wheel. 9. The wheelchair drive boost apparatus of claim 1, wherein the drive wheel is coupled to the transmission via a one-way bearing that permits free rotation of the drive wheel with respect to the drive lever in a first direction and constrains rotation of the drive wheel with respect to the drive lever in a second direction opposite the first direction. 10. The wheelchair drive boost apparatus of claim 1, further comprising a friction brake, wherein the friction brake comprises: a brake actuator disposed in the drive lever; anda brake effector selectively positionable with respect to the housing. 11. A drive-assisted wheelchair comprising: a main wheel; anda drive boost apparatus removably engagable with the main wheel, the drive boost mechanism comprising: a housing,a drive wheel comprising a drive axis, wherein the drive axis is movable with respect to the housing,a drive lever that engages with the drive wheel to cause the drive wheel to rotate,a transmission that couples the drive lever to the drive wheel via a gear train disposed between the drive lever and the drive wheel, the gear train comprising a first gear spur concentric with the drive lever and a second gear spur concentric with the drive wheel, wherein the drive wheel is coupled to the transmission via a one-way engagement mechanism that permits free rotation of the drive wheel with respect to the drive lever in a first direction and constrains rotation of the drive wheel with respect to the drive lever in a second direction opposite the first direction, andan engager having a first position and a second position, wherein the engager is configured to move the drive axis with respect to the housing. 12. The drive-assisted wheelchair of claim 11, further comprising a drive wheel coupled to the drive lever, wherein the drive wheel contacts the wheel when the engager is in the first position. 13. The drive-assisted wheelchair of claim 11, further comprising: a frame; anda housing removably mounted to the frame,wherein the drive lever and the engager are coupled to the housing. 14. A wheelchair drive boost system comprising: a wheelchair comprising a first main wheel and a second main wheel;a first wheelchair drive boost assembly comprising a first drive lever, a first drive wheel frictionally contacting the first main wheel, and a first transmission that couples the first drive lever to the first drive wheel; anda second wheelchair drive boost assembly comprising a second drive lever, a second drive wheel frictionally contacting the second main wheel, and a second transmission that couples the second drive lever to the second drive wheel,wherein: a forward movement of the first drive lever causes the first drive wheel to propel the first main wheel forward and a forward movement of the second drive lever causes the second drive wheel to propel the second main wheel forward, andthe first transmission and the second transmission each multiply the respective forces applied to the first drive lever and the second drive lever to increase a force of the forward movements of the respective first main wheel and second main wheel. 15. The wheelchair drive boost system of claim 14, wherein: the wheelchair further comprises a frame, a first housing and a second housing each removably mounted to the frame;the first drive lever, the first drive wheel, and the first transmission are coupled to the first housing; andthe second drive lever, the second drive wheel, and the second transmission are coupled to the second housing. 16. The wheelchair drive boost system of claim 15, further comprising: a first engager configured to move a first drive axis of the first drive wheel with respect to the first housing between a coupled position and a decoupled position; anda second engager configured to move a second drive axis of the second drive wheel with respect to the second housing between a coupled position and a decoupled position. 17. The wheelchair drive boost system of claim 14, further comprising: a first friction brake coupled to the first wheelchair drive boost assembly; anda second friction brake coupled to the second wheelchair drive boost assembly.
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이 특허에 인용된 특허 (58)
Oxford Stuart G. (7817 Crown Point Ave. Omaha NE 68134), All-terrain wheelchair.
Beddome David W. (North Tonawanda NY) Macy William H. (Williamsville NY) Mollendorf Joseph C. (Amherst NY) Peebles Kenneth L. (Lancaster NY) Dressing Thomas G. (Rochester NY), Four-line exercising attachment for wheelchairs.
Brereton H. Arthur (417 Crescent ; NE. Grand Rapids MI 49503) Harrett ; Jr. Charles C. (933 Lakeside Grand Rapids MI 49506), Ratcheting wheelchair hub.
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