Patent ID: 7118556

Claim:
A forward-mounted plunger control adapter for retrofit attachment to a pre-existing syringe where the pre-existing syringe includes a needle, a hub for holding the needle, a barrel having a leading end to which the hub is mounted, a pair of laterally-extending tabs formed integrally with a trailing end of said barrel, an elongate plunger having a leading end slideably mounted within the barrel and a trailing end external to the barrel, said adaptor comprising: a slide member adapted to slideably engage a first, upper surface of said barrel; a flange housing adapted to releasably engage a flange formed integrally with a trailing end of said plunger; an elongate connector for interconnecting said slide member to said flange housing so that movement of said slide member effects simultaneous and corresponding movement of said flange housing and hence of said plunger flange and hence of said plunger; a guide member adapted to releasably engage said laterally-extending tabs; said guide member adapted to releasably engage said barrel; said guide member adapted to be grasped between fingers of a hand of a user; said guide member being releasably and slideably engaged to said elongate connector; said slide member adapted to be controlled by a digit of a user; said slide member being positioned at a leading end of said barrel in closely spaced relation to a leading end of said plunger; said slide member including a first, lower surface for slideably engaging said upper surface of said barrel and a second, upper surface adapted for continuous abutting engagement by a thumb or finger when said plunger is retracted in a leading-to-trailing direction and when said plunger is advanced in a trailing-to-leading direction; whereby said syringe is adapted to be held in a single preselected hand when said adaptor is engaged thereto; and whereby no change in hand position is needed between a retraction of said plunger in a leading-to-wailing direction relative to said barrel and advancement of said plunger in a trailing-to-leading direction relative to said barrel.