| 主权项 |
1. A clutch mechanism comprising:
a first clutch member comprising:
a tab, said tab defining a first aperture, said first aperture comprising a central portion, a first keyway extending radially from said central portion, and a second keyway extending radially from said central portion; a second clutch member comprising:
a second tab defining a second aperture, said second aperture comprising a central portion and a third keyway extending radially from said central portion; anda third tab defining a third aperture, said third aperture comprising a central portion and a fourth keyway extending radially from said central portion;said third tab parallel to and spaced from said second tab such that said third aperture is coaxial with said second aperture and said fourth keyway is aligned with said third keyway; wherein said first tab is received between said second tab and said third tab such that said central portion of said first aperture is coaxial with said central portions of said second aperture and said third aperture and such that each of said third and fourth keyways are selectively alignable with said first keyway in a first configuration and selectively alignable with said second keyway in a second configuration; and a locking member in sliding engagement with said central portions of each of said first, second, and third tabs, said locking member slidable between a first position and a second position, said locking member comprising:
a first key configured for selective engagement with said first keyway and said second keyway, said first key engaged with said first keyway or said second keyway when said locking member is in said first position but not keyed to said first keyway or said second keyway when said locking member is in said second position; anda second key keyed to said fourth keyway when said locking member is in either of said first and second positions. |
