초록 ▼

A syringe comprising a cylindrical barrel with a wall at one end with a nozzle and with a threaded actuating rod extending from its other end, the rod carrying a piston in fluid tight engagement with the inner wall of the barrel. The rod also carries a collar with threads which mate with the rod thr

A syringe comprising a cylindrical barrel with a wall at one end with a nozzle and with a threaded actuating rod extending from its other end, the rod carrying a piston in fluid tight engagement with the inner wall of the barrel. The rod also carries a collar with threads which mate with the rod threads, and the collar has slots which engage projections on the barrel and prevent movement of the collar relative to the barrel but which permit the collar to be disengaged readily from the barrel. A manually engageable knob is rotatably mounted on the rod at its end remote from the piston and is interconnected with the rod by a compressible, spiral spring. A ratchet wheel is mounted on the rod so as to rotate therewith and is adjacent the knob. The knob carries a spring biased pawl in the form of a tooth which is engageable with the ratchet wheel teeth. As the pressure on the fluid in the barrel is increased, the spring is compressed and the knob rotates with respect to the rod causing the pawl to assume a position dependent on the pressure.

대표청구항 ▼

A manually actuable syringe comprising: a hollow body with an interior wall, a fluid transport opening at one end thereof and a piston receiving opening at the opposite end thereof; a piston within said body which has fluid tight engagement with said interior wall, said piston being slidable toward

A manually actuable syringe comprising: a hollow body with an interior wall, a fluid transport opening at one end thereof and a piston receiving opening at the opposite end thereof; a piston within said body which has fluid tight engagement with said interior wall, said piston being slidable toward and away from said transport opening; a manually operable actuating rod extending at one end from said piston receiving opening and slidable within said body, said rod having means engageable with said body for moving said rod toward said transport opening when said rod is rotated and being connected to said piston at one end of said rod; a manually engageable knob rotatably mounted on said rod at the end thereof opposite from the end thereof which is connected to said piston; spring means interconnecting said knob with said rod and opposing rotation of said knob with respect to said rod; means adjacent said knob rotatable with said rod; means on said knob adjacent said means rotatable with said rod for indicating rotation of said knob relative to said rod and thereby, indicating the pressure applied to fluid within said body of said piston.