TODAY’S PATENT – BLOOD SAMPLING INSTRUMENT
This invention “Blood sampling instrument” was invented by Paul D. Levin and John D. Harding and was assigned to Palco Labs Inc, was granted patent on 21st May, 1985 by the USPTO bearing patent grant number US4517978A to the patentee. The current invention relates to a blood sampling device for taking a few drops of blood from a finger or the like. The device is primarily made of a tubular member that hides all the working parts and has a flange so that it can be held by a patient and pressed against a finger while releasing a trigger mechanism to activate a plunger inside the device.
The tubular member of the present invention has a hollow sleeve surrounding the spring chamber, a plunger mounted for reciprocation within the tubular member, a shoulder within the tubular member, an annular flange immediately behind the nosepiece at the distal end of the collar, and an aperture at the terminal end of the hollow nosepiece at the distal end of the invention, a trigger button extending from said collar and having means to engage the finger on said plunger, plunger cocking means on said sleeve to pull said plunger away from said nosepiece and engage said finger, and an aperture on the side of said tubular member, a finger on said plunger to engage said aperture and hold said plunger when said plunger is drawn away from said nosepiece