초록 ▼

A roller skate includes a selectively engagable ratcheting plate that can be positioned for engaging a plurality of teeth formed integrally in one or more wheels of the skate. The plate rides on a cam that is slidably positioned for selective racheting or freewheeling operation. In the ratcheting mo

A roller skate includes a selectively engagable ratcheting plate that can be positioned for engaging a plurality of teeth formed integrally in one or more wheels of the skate. The plate rides on a cam that is slidably positioned for selective racheting or freewheeling operation. In the ratcheting mode the skate is prevented from rolling backwards thereby making it easier for a beginning skater to use.

대표청구항 ▼

1. A roller skate adapted for selectable unidirectional or bidirectional motion comprising: a hollow body; a plurality of wheels attached to said body, at least one of said wheels having a cylindrical rolling portion including an inner surface surrounding a hollow inner chamber; a plurality of

1. A roller skate adapted for selectable unidirectional or bidirectional motion comprising: a hollow body; a plurality of wheels attached to said body, at least one of said wheels having a cylindrical rolling portion including an inner surface surrounding a hollow inner chamber; a plurality of ratchet teeth formed in said surface; a vertically oriented plate mounted for slidable movement vertically within said body and having pawl means at one end of said plate extending out of said body and at least partially into said chamber; and control means for moving said plate between a first position wherein said pawl means is lowered into engagement with said teeth in a ratcheting manner and a second position wherein said pawl means is raised out of engagement with said teeth. 2. The roller skate of claim 1 wherein said at least one wheel comprises an outer cylindrical portion, an inner cylindrical portion and a washer-shaped web joining said portions. 3. The skate of claim 2 wherein said pawl means extends into the space between said inner and said outer cylindrical portions. 4. The skate of claim 1 wherein said plate comprises a substantially flat V-shaped member having a centrally disposed cam follower surface. 5. The skate of claim 4 wherein said control means includes slidable cam means engaging said cam follower surface for selectably moving said pawl between said first and second positions. 6. The skate of claim 5 wherein said cam means comprises a generally S-shaped member. 7. The skate of claim 6 wherein said cam means further comprises an inclined portion engaging said cam follower surface. 8. The skate of claim 7 wherein said control means further includes selector means attached to said cam means movable between first and second stops for positioning said pawl in said first and second positions. 9. The skate of claim 8 further comprising detent means for maintaining said cam means in said preselected position.