초록 ▼

A foldable transport device includes a center frame, side frames each pivotably connected to the center frame at opposite sides thereof for angular movement to a folded position where the side frames folded over the center frame and to an unfolded position; and cross members releasably secured to an

A foldable transport device includes a center frame, side frames each pivotably connected to the center frame at opposite sides thereof for angular movement to a folded position where the side frames folded over the center frame and to an unfolded position; and cross members releasably secured to and extending between the side frames when the frames are unfolded. A cover, supported on the frames, may be used to provide a sheltered a space within the unfolded frame. The side frames function as runners in the unfolded position and have wheels for use in the folded position.

대표청구항 ▼

What is claimed is: 1. A foldable transport device, comprising: a center frame; a pair of side frames, each said side frame being pivotably connected to said center frame at opposite sides thereof for angular movement between a folded position wherein said side frames are folded over said center fr

What is claimed is: 1. A foldable transport device, comprising: a center frame; a pair of side frames, each said side frame being pivotably connected to said center frame at opposite sides thereof for angular movement between a folded position wherein said side frames are folded over said center frame and an unfolded position wherein said side frames extend outwardly from said center frame, said center and side frames extending longitudinally from a first end to a second end of the device; and at least one arm releasably secured to and extending between said side frames for maintaining said side frames in the unfolded position. 2. The device according to claim 1 including a cover supported on said side frames and said center frame and at least partially enclosing a space bounded by said side and center frames when said side frames are in the unfolded position and said center and side frames are oriented generally vertically with said first end above said second end. 3. The device according to claim 1 including a seat supported on said at least one arm when said side frames are in the unfolded position and said center and side frames are oriented generally vertically with said first end above said second end. 4. The device according to claim 3 including another arm releasably secured to and extending between said side frames, said seat being supported on said another arm. 5. The device according to claim 1 wherein each said side frame further comprises: first and second axially directed parallel rails; and at least two struts transversely extending secured to said rails and interconnecting said rails at axially spaced locations, said at least one arm being releasably secured to one of said struts on each of said side frames for maintaining said side frames in the unfolded position. 6. The device according to claim 5 including a post secured to said one strut on each said side frame, said at least one arm having tubular portions sized to fit over said posts. 7. The device according to claim 1 including a sleeve secured to said one strut on each said side frame, said sleeves being sized to receive said at least one arm. 8. The device according to claim 1 including a pair of wheels each rotatably attached to an associated one of said side frames for engaging a support surface when said side frames are in the folded position. 9. The device according to claim 1 further comprising: said center frame including a central rail, an upper rail secured to and extending transversely to said central rail at said first end of the device, and a lower rail secured to and extending transversely to said central rail at said second end of the device; a pair of mutually aligned first pivot tubes, each said first pivot tube being secured to a first end of an associated one of said upper and lower rails, one of said side frames being supported by said first pivot tubes for said angular movement; and a pair of mutually aligned second pivot tubes, each said second pivot tube being secured to a second end of an associated one of said upper and lower rails, another one of said side frames being supported by said second pivot tubes for said angular movement. 10. The device according to claim 1 further comprising: a post secured to said central frame and extending therefrom, said post having a lateral hole formed therein; a plate having an opening formed therein receiving said post; and a pin received in said lateral hole and securing said side frames in the folded position between said central frame and said plate. 11. The device according to claim 1 including a load carrying platform supported by said center frame and said side frames. 12. The device according to claim 11 including a seat resting on said platform. 13. The device according to claim 1 including a handle extending from said center frame. 14. A foldable transport device providing shelter, comprising: a center frame; a pair of side frames, each said side frame being pivotably connected to said center frame at opposite sides thereof for angular movement between a folded position wherein said side frames are folded over said center frame and to an unfolded position wherein said side frames extend outwardly from said center frame, said center and side frames extending longitudinally from a first end to a second end of the device; a pair of arms each releasably secured to and extending between said side frames for maintaining said side frames in the unfolded position; and a removable fitted cover conforming to and supported on said frames, said cover at least partially enclosing a space bounded by said frames when said side frames are in the unfolded position. 15. The device according to claim 14 including a pair of wheels, each said wheel being rotatably attached to an associated one of said side frames whereby said wheels engage a support surface when said side frames are in the folded position. 16. The device according to claim 14 including a seat releasably supported on said arms. 17. The device according to claim 16 including a platform supported by said center frame and said side frames and having at least one hole formed therein for releasably retaining said seat when said seat is released from said arms. 18. A foldable transport device, comprising: a center frame including a central rail, an upper rail secured to and extending transverse to said central rail, and a lower rail secured to and extending transverse to said central rail and spaced from said upper rail; a pair of side frames, each said side frame being pivotably connected to said center frame at opposite sides thereof for angular movement between a folded position wherein said side frames are folded over said center frame and to an unfolded position wherein said side frames extend outwardly from said center frame, said center and side frames extending longitudinally from a first end to a second end of the device; and a pair of arms each releasably secured to and extending between said side frames for selectively maintaining said side frames in the unfolded position. 19. The device according to claim 18 further comprising: a pair of posts secured to said central frame and extending therefrom, each said post having a lateral hole formed therein; a pair of plates each having an opening formed therein receiving one of said posts; a pair of pins, each said pin received in said lateral hole of an associated one of said posts and securing said side frames in the folded position between said central frame and said plates; and a pair of wheels, each said wheel being rotatably attached to an associated one of said side frames whereby said wheels engage a support surface when said side frames are in the folded position. 20. The device according to claim 18 including a seat having a plurality of clamping spools for releasably engaging said arms, and a platform supported by said center frame and said side frames, said platform having a plurality of holes formed therein for releasably receiving said clamping spools when said clamping spools are released from said arms.