Patent ID: 8052421

Claim:
A dispensing syringe for dispensing a two-component composition, comprising: a) a syringe body including, i) a first elongated barrel having a proximate opening for receiving a first plunger rod and a first exit port for discharging a first component of the composition; ii) a second elongated barrel having a proximate opening for receiving a second plunger rod and a second exit port for discharging a second component of the composition, the first and second barrels being arranged in parallel along the length of the syringe body; b) a plunger rod assembly including, i) a rearward stop plate, ii) a first plunger rod having an outer threaded edge and an inner non-threaded edge, the first plunger rod having a forward-facing end portion for forcing the first component of the composition into the first exit port, and an opposing rear-facing end portion attached to the stop plate, iii) a second plunger rod having an outer threaded edge and an inner non-threaded edge, the second plunger rod having a forward-facing end portion for forcing the second component of the composition into the second exit port, and an opposing rear-facing end portion attached to the stop plate, wherein the first and second plunger rods are arranged in parallel for joint movement within the first and second barrels respectively; and c) a rotatable, threaded knob for connecting the plunger rod assembly to the syringe body, the threaded knob having a through-bore with a continuous internal thread for engaging the outer threaded edges of the first and second plunger rods so that only the knob is rotated and the syringe body remains stationary and as the knob is rotated about the longitudinal axis of the syringe body, the plunger rods move together in a forward or rearward direction within the barrels, wherein the syringe body further comprises a central supporting member having a pair of inner grooved segments for receiving radial fins extending along the inner surfaces of the first and second plunger rods and guiding the plunger rods into the first and second barrels respectively.