Suction device

Claim 1

A SUCTION DEVICE FOR REMOVING VENOM COMPRISING: A CYLINDRICAL BARREL OF PLASTIC MATERIAL HAVING AN OPEN UPPER END PROVIDED WITH LATERALLY PROJECTING, FINGER-ENGAGING FLANGE MEANS AND WITH AN OPEN LOWER END PROVIDED WITH A FITTED NOZZLE PORTION WHICH IS GENERALLY ELLIPTICAL IN CROSS SECTION WITH ITS MAJOR TRANSVERSE AXIS BEING SUBSTANTIALLY GREATER THAN ITS MINOR TRANSVERSE AXIS AND WITH THE OUTER FACE THEREOF BEING CURVED CONCAVELY INWARDLY TOWARDS THE CENTRAL PORTION OF THE SIDE WALLS THEREOF WHICH EXTEND ALONG THE MAJOR AXIS SO AS TO PROVIDE A CONTOURED SKIN ENGAGING SURFACE; A TUBULAR PLASTIC PLUNGER PROJECTING INTO THE OPEN UPPER END OF THE BARREL AND BEING CLOSED AT ITS LOWER END AND OPEN AT ITS UPPER END TO PROVIDE A RECEPTACLE FOR ACCESSORIES IN THE INTERIOR THEREOF AND HAVING A PACKING RING EXTENDING AROUND THE EXTERIOR OF ITS LOWER END TO FORM A SEALING FIT WITH THE INTERIOR OF THE BARREL AND AN OUTWARDLY FLARED OPERATING HEAD EXTENDING AROUND THE OPEN UPPER END WITH A CONCAVE SURFACE FOR ENGAGEMENT BY THE THUMB OF THE OPERATOR, THE OUTSIDE DIAMETER OF THE PLUNGER FOR THE MAJOR PORTION OF THE LENGTH THEREOF BEING SLIGHTLY SMALLER THAN THE INSIDE DIAMETER OF THE BARREL SO AS TO PROVIDE A SLIDING AND GUIDING FIT THEREBETWEEN; AND A HELICAL SPRING DISPOSED AROUND THE PLUNGER AND EXTENDING BETWEEN THE OPEN UPPER END OF THE BARREL AND THE OUTWARDLY FLARED OPERATING HEAD OF THE PLUNGER SO AS TO NORMALLY URGE THE PLUNGER IN A DIRECTION OUTWARDLY OF THE BARREL, SAID BARREL BEING FORMED WITH AN INWARDLY PROJECTING RETAINING COLLAR EXTENDING AROUND THE INNER SURFACE OF THE OPEN UPPER END THEREOF AND SAID PLUNGER BEING FORMED WITH A PLURALITY OF OUTWARDLY PROJECTING LUGS SPACED A SHORT DISTANCE FROM THE OPERATING HEAD WHICH ARE ENGAGEABLE WITH THE RETAINING COLLAR TO LIMIT THE INWARD SHIFT OF THE PLUNGER AND SAID PLUNGER ALSO BEING FORMED WITH A PLURALITY OF RESILIENT RETAINING TABS SPACED AROUND THE PERIPHERY THEREOF A SHORT DISTANCE ABOVE THE PACKING RING WITH THE LOWER END OF SAID RETAINING TABS BEING INTEGRAL WITH THE LOWER PORTION OF THE PLUNGER AND FLARING OUTWARDLY AND UPWARDLY AT AN ANGLE TERMINATING IN UPPER ENDS PROVIDING SHOULDERS PROJECTING BEYOND THE PERIPHERAL SURFACE OF THE PLUNGER SO AS TO ENGAGE THE RETAINING COLLAR WHEN THE PLUNGER IS SHIFTED OUTWARDLY BY THE SPRING AND THEREBY LIMIT THE RELATIVE OUTWARD MOVEMENT OF THE PLUNGER, SAID TABS BEING SHIFTABLE INWARDLY SO AS TO BE SUBSTANTIALLY FLUSH WITH THE PLUNGER WHEREBY THE PLUNGER MAY BE ASSEMBLED WITH THE BARREL, THE LOWER END OF SAID PLUNGER BEING COMPLETELY CLOSED AND SEALED SO THAT THERE IS NO ACCESS FROM THE INTERIOR OF THE PLUNGER TO THE INTERIOR OF THE BARREL AND THE INTERIOR OF SAID BARREL BEING FREE FROM OBSTRUCTIONS SO AS TO PROVIDE MAXIMUM DISPLACEMENT AS THE PLUNGER IS SHIFTED INWARDLY AND MAXIMUM SUCTION AS THE PLUNGER IS SHIFTED OUTWARDLY.