Set of double needles for injecting liquid medicine

Claim 1

Apparatus for injecting liquid medicine at each of a plurality of user-selected nearby locations through a common entry point of the injected body, comprising: an inner needle, and an outer needle into which said inner needle is slidably and rotatably inserted, each of said needles having a sharp distal end and a proximate end formed for selectively communicating with a source of liquid medicine for pressurized injection thereof into said injected body at a selected first location of said body for injection through said sharp distal end of said outer needle and at a plurality of selected second locations in said body through said sharp distal end of said inner needle; said inner needle being longer than said outer needle and having a curved portion at the distal end thereof which protrudes from the distal end of said outer needle when fully inserted thereinto, said inner and outer needles cooperating such that said curved portion of said inner needle is straightened within said outer needle when retracted therein and said inner and outer needles are then rotatable to different angular disposition relative to each other for subsequent reinsertion of said inner needle into said outer needle to thereby locate the sharp distal end of said inner needle at a selected other one of said plurality of second locations for injection of said liquid medicine thereat; said apparatus further comprising an inner needle base fixed to the proximate end of said inner needle, an outer needle base fixed to the proximate end of said outer needle, and a guide means for regulating the rotation of said inner needle base stepwise by a predetermined angle, wherein said guide means comprises a plurality of longitudinally formed guide grooves formed on the outer surface of said outer needle base and a guide arm which is fixed on the inner needle base to extend adjacent to and along the inner needle and is capable of sliding along at least one of said guide grooves engaged therewith, said guide grooves being distant form each other by a predetermined angle and said guide means further comprises a neck portion formed around the outer surface of said outer needle base adjacent and connected to said guide grooves with said guide arm being capable of sliding around said neck portion.