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A wheel lock for a wheelchair, where the wheelchair has a rear drive wheel, includes a housing adapted to be mounted on the wheelchair. The housing has two pivot points spaced apart in a forward/rearward direction. A wheel contact arm has a pivot shaft pivotally mounted about one of the pivot points

A wheel lock for a wheelchair, where the wheelchair has a rear drive wheel, includes a housing adapted to be mounted on the wheelchair. The housing has two pivot points spaced apart in a forward/rearward direction. A wheel contact arm has a pivot shaft pivotally mounted about one of the pivot points. The wheel contact arm has a wheel engagement edge adapted to contact the rear drive wheel. The wheel lock also includes an actuation lever pivotally mounted about the other of the pivot points, and a linkage connecting the wheel contact arm and the actuation lever. The housing, the pivot shaft, the actuation lever and the linkage form a four bar linkage. Pivoting of the actuation lever causes pivoting of the wheel contact arm to engage the wheel contact edge with the rear drive wheel.

대표청구항 ▼

A wheel lock for a wheelchair, where the wheelchair has a rear drive wheel, includes a housing adapted to be mounted on the wheelchair. The housing has two pivot points spaced apart in a forward/rearward direction. A wheel contact arm has a pivot shaft pivotally mounted about one of the pivot points

A wheel lock for a wheelchair, where the wheelchair has a rear drive wheel, includes a housing adapted to be mounted on the wheelchair. The housing has two pivot points spaced apart in a forward/rearward direction. A wheel contact arm has a pivot shaft pivotally mounted about one of the pivot points. The wheel contact arm has a wheel engagement edge adapted to contact the rear drive wheel. The wheel lock also includes an actuation lever pivotally mounted about the other of the pivot points, and a linkage connecting the wheel contact arm and the actuation lever. The housing, the pivot shaft, the actuation lever and the linkage form a four bar linkage. Pivoting of the actuation lever causes pivoting of the wheel contact arm to engage the wheel contact edge with the rear drive wheel. andle member having a first handle retracted position within said handle receiving compartment and a second handle extended position extending from said handle receiving compartment; i) a detachable and collapsible lectern top assembly, said lectern top assembly includes a lectern tabletop having a bracing slot opening, said lectern tabletop being hingedly connected to a front support bracket, a pair of side support brackets, and a support brace having an upper end and a lower end; and j) said top wall includes a pair of spaced-apart grooved channels for slidably receiving said pair of side support brackets, respectively. 2. A portable file case holder in accordance with claim 1, wherein said means for mounting include a plurality of spaced-apart sets of mounting receiving slots being molded with each of said side interior wall surfaces. 3. A portable file case holder in accordance with claim 2, wherein said connecting means for each set of mounting receiving slots include U-shaped channels for receiving a shelving member therein. 4. A portable file case holder in accordance with claim 1, wherein said means for mounting include a plurality of paired, spaced-part mounting brackets being fixedly attached to each of said side interior wall surfaces. 5. A portable file case holder in accordance with claim 4, wherein said connecting means of each of said paired mounting brackets include U-shaped channels for receiving said shelving member therein. 6. A portable file case holder in accordance with claim 1, wherein said shelving member includes a bottom wall surface having mounting tabs thereon. 7. A portable file case holder in accordance with claim 6, wherein said connecting means of each of said paired mounting brackets include a pair of mounting ports thereon for receiving of said mounting tabs of said shelving member. 8. A portable file case holder in accordance with claim 1, wherein said shelving member includes a bottom wall surface having a pair of insert tab members thereon and a top wall surface having a pair of J-shaped clamping members thereon. 9. A portable file case holder in accordance with claim 8, wherein said connecting means of each of said paired mounting brackets include mounting insert slots thereon for receiving of said insert tab members of said shelving member and for receiving of said J-shaped clamps of said shelving member on each of said paired mount brackets thereto. 10. A portable file case holder in accordance with claim 1, wherein said rear interior wall surface includes secondary means for mounting; wherein said secondary means for mounting include said connecting means thereto for receiving said shelving member for providing additional stability to said shelving members when loaded with documents in the form of file folders, books, notebooks, 3-ring binders, manuscripts, transcripts and/or computer printouts. 11. A portable file case holder in accordance with claim 10, wherein said secondary means for mounting include a plurality of spaced-apart mounting receiving slots being molded within said rear interior wall surface. 12. A portable file case holder in accordance with claim 10, wherein said secondary means for mounting include a plurality of spaced-apart mounting brackets being fixedly attached to said rear interior wall surface. 13. A portable file case holder in accordance with claim 1, wherein said plurality of locking means for said detachable file case door includes a plurality of lock receiving slots on said perimeter edging of said detachable file case door. 14. A portable file case holder in accordance with claim 13, wherein each of said side exterior wall surfaces include a pair of catch locking members thereon for connecting and locking with said plurality of lock receiving slots of said detachable file case door in order to completely close said file case door on said interior compartment of said case housing. 15. A portable file case holder in accordance with claim 1, wherein said