초록 ▼

A wheelchair has a frame assembly with longitudinal beams having grooves accommodating connecting members that retain the connecting members without welds on the beams. Expansion devices hold the connecting members in fixed positions on the beams. Supports secured to the connecting members are attac

A wheelchair has a frame assembly with longitudinal beams having grooves accommodating connecting members that retain the connecting members without welds on the beams. Expansion devices hold the connecting members in fixed positions on the beams. Supports secured to the connecting members are attached to wheels, a back rest, and a foot rest assembly.

대표청구항 ▼

1. A wheelchair for a person comprising: a frame assembly having a pair of longitudinal beams, each beam having transverse flanges and ribs joined to the flanges providing at least one side groove, cross links connecting the beams, rear supports releasably connected to the beams, front supports rele

1. A wheelchair for a person comprising: a frame assembly having a pair of longitudinal beams, each beam having transverse flanges and ribs joined to the flanges providing at least one side groove, cross links connecting the beams, rear supports releasably connected to the beams, front supports releasably connected to the beams, each front and rear support having an expandable member located between said transverse flanges in said side groove, and a member operable to expand the expandable member into non-moving engagement with the beam thereby connecting each front and rear support to the beam, wheels rotatably mounted on the rear supports, a seat assembly mounted on the beams between said wheels, caster wheels mounted on the front supports, and a foot rest assembly mounted on the front supports for supporting the legs and feet of a person seated on the seat assembly. 2. The wheelchair of claim 1 wherein: the member to expand the expandable member is an elongated bar having a longitudinal hole, a bolt extending through said hole, and a nut threaded onto the bolt to compress the bar and expand the bar, said bar and nut compressing said bar thereby expanding the expandable member into non-moving relationship with the beam. 3. The wheelchair of claim 2 wherein: the expandable member is a U-shaped member located in the side groove in the beam, said bar being located in said U-shaped member. 4. A wheelchair for a person comprising: a frame assembly having a pair of longitudinal beams, each beam has side grooves in opposite sides of the beam, cross links connecting the beams, rear supports releasably connected to the beams, front supports releasably connected to the beams, each of said front and rear supports having a pair of plates located adjacent said opposite sides of the beam, each plate having an expandable member located in one of said side grooves, and a member operable to expand the expandable member into engagement with the beam to hold the plate in a non-movable position relative to the beam, wheels rotatably mounted on the rear supports, a seat assembly mounted on the beams between said wheels, caster wheels mounted on the front support, and a foot rest assembly mounted on the front supports for supporting the legs and feet of a person seated on the seat assembly. 5. The wheelchair of claim 4 wherein: the expandable member is a U-shaped member located in the side groove, said member operable to expand the expandable member is located within the U-shaped member whereby the U-shaped member is expandable into non-moving engagement with the beam. 6. The wheelchair of claim 5 wherein: the member operable to expand the U-shaped member is an elongated bar having a longitudinal hole, a bolt extending through said hole, and a nut threaded onto the bolt, said bolt and nut compressing said bar thereby expanding the U-shaped member into non-moving relationship with the beam. 7. The wheelchair of claim 4 wherein: the front supports include upright tubular members and plates secured to the tubular members, connectors releasably securing the plates to the beams, said foot rest assembly having male members that fit in the tubular members to releasably mount the foot rest assembly on the tubular members. 8. The wheelchair of claim 4 wherein: the seat assembly has legs, pivot members connecting the legs to the male members to allow the foot rest assembly to move between vertical and horizontal positions, and releasable latches connected to the legs and male members for holding the foot assembly in a selected position. 9. The wheelchair of claim 4 wherein: the seat assembly includes a base plate and a back rest, said base plate being mounted on said beams, said back rest including upright members, and means releasably connecting the upright members to the beams. 10. A wheelchair for a person comprising: a seat and back rest, frame means for supporting said seat and back rest, said frame means having a pair of longitudinal beams, each bea m having transverse flanges and ribs joined to the flanges providing at least one side groove, means connecting the beams, first supports, and second supports, each first and second supports having an expandable member located in the groove, first means releasably connecting the first supports to the beams, said first means each including a member operable to expand an expandable member into non-moving engagement with the beam thereby connecting the first support to the beam, second means releasably connecting the second supports to the beams, said second means each including a member operable to expand an expandable member into non-moving engagement with the beam thereby connecting the second support to the beam, first wheels rotatably mounted on the first supports, and second wheels mounted on the second supports. 11. The wheelchair of claim 10 wherein: each member to expand the expandable member is an elongated bar having a longitudinal hole, a bolt extending through said hole, and a nut threaded onto the bolt to compress the bar and expand the bar, said bolt and nut compressing said bar thereby expanding the expandable member into non-moving relationship with the beam. 12. The wheelchair of claim 11 wherein: the expandable member is a U-shaped member located in the side groove in the beam, said bar being located in said U-shaped member. 13. A wheelchair for a person comprising: a seat and back rest, frame means for supporting said seat and back rest, said frame means having a pair of longitudinal beams, each beam has side grooves in opposite sides of the beam, means connecting the beams, first supports, and second supports, each of said first and second supports having a pair of plates located adjacent said opposite sides of a beam, each plate having an expandable member located in a side groove, a member operable to expand the expandable member to hold the plate in a non-movable position relative to the beam, first wheels rotatable mounted on the first supports, and second wheels mounted on the second supports. 14. The wheelchair of claim 13 wherein: the expandable member is a U-shaped member located in the side groove, said member operable to expand the expandable member is located within the U-shaped member whereby the U-shaped member is expanded into non-moving engagement with the beam. 15. The wheelchair of claim 14 wherein: the member operable to expand the U-shaped member is an elongated bar having a longitudinal hole, a bolt extending through said hole, and a nut threaded onto the bolt, said bolt and nut compressing said bar thereby expanding the U-shaped member into non-moving relationship with the beam. 16. A wheelchair for a person comprising: a frame assembly having a pair of longitudinal beams, each beam having transverse flanges and ribs joined to the flanges providing at least one side groove, cross links connecting the beams, rear supports releasably connected to the beams, and front supports releasably connected to the beams, each rear and front support having an expandable member located in a side groove, and a member operable to expand the expandable member into non-moving engagement with the beam thereby connecting the rear and front supports to the beams, wheels rotatably mounted on the rear supports, a seat assembly mounted on the beams between said wheels, and caster wheels mounted on the front support. 17. The wheelchair of claim 16 wherein: the member to expand the expandable member is an elongated bar having a longitudinal hole, a bolt extending through said hole, and a nut threaded onto the bolt to compress the bar and expand the bar, said bolt and nut compressing said bar thereby expanding the expandable member into non-moving relationship with the beam. 18. The wheelchair of claim 17 wherein: the expandable member is a U-shaped member located in the side groove in the beam, said bar being located in said U-shaped member. 19. A wheelchair for a person comprising: a frame assembly having a pair o f longitudinal beams, each beam has side grooves in opposite sides of the beam, rear supports releasably connected to the beams, front supports releasably connected to the beams, each of said front and rear supports having a pair of plates located adjacent said opposite sides of the beam, each plate having an expandable member located in a side groove, and a member operable to expand the expandable member to hold the plate in a non-movable position relative to the beam, wheels rotatably mounted on the rear supports, a seat assembly mounted on the beams between said wheels, and caster wheels mounted on the front support. 20. The wheelchair of claim 19 wherein: the expandable member is a U-shaped member located in the side groove, said member operable to expand the expandable member is located within the U-shaped member whereby the U-shaped member is expanded into non-moving engagement with the beam. 21. The wheelchair of claim 20 wherein: the member operable to expand the U-shaped member is an elongated bar having a longitudinal hole, a bolt extending through said hole, and a nut threaded onto the bolt, said bolt and nut compressing said bar thereby expanding the U-shaped member into non-moving relationship with the beam.