Abstract: A hand held, spring actuated single stroke piston desoldering instrument having a removable, replaceable nozzle tip in combination with a novel removal tool which also serves as a holder for several spare tips is disclosed. The barrel of the desoldering instrument is one-piece molded and includes an end cap portion with a forwardly protruding nose portion having a nozzle retaining central bore therethrough. The novel replaceable nozzle element has two annular grooves formed about its periphery: the first mates with an annular reduced diameter shoulder within the retaining bore of the end cap; the second is normally disposed forwardly of an outside of the end cap where it may be gripped by a pair of flexible jaws on the removal tool.

Abstract: A portable vacuum pump for desoldering applications has a hollow cylindrical barrel forming a vacuum cylinder containing a plunger. The pump has a trigger housing containing a single compression spring. The spring is mounted outside the barrel. No separate return spring is required to hold the trigger in the latched position. The single trigger keeps the spring end out of the barrel and thus out of contact with the soldering debris. This allows more space for the plunger, producing a longer stroke and a higher vacuum.

Abstract: A pair of tweezers specifically designed for removing DIP (dual in-line pins) components or other electronic components from a circuit board. To this end, the tweezers include a pair of legs secured together at the top portion and having a sharply inwardly bent end portion formed with claws for engaging the pins of a DIP component. Near the curved ends of the tweezers there may be provided a bumper for each leg extending through an opening in the leg. The bumper serves the purpose to hold the DIP component between the curved end portions and the bumpers. A sliding clamp is provided which is of general U-shape and provided with an elongated slit. The clamp may be secured by a knurled nut extending through an opening in the legs of the tweezers. Hence, the clamp may be slid downwardly of the legs to squeeze them together. Thus, the opening between the jaws may be adjusted to the size of the component to be removed.

Abstract: A liquid dispenser includes a conventional syringe of the type having a piston, a piston rod, an actuating knob disposed in a cylinder, and a needle extending from the cylinder. The invention consists of a needle assembly therefor which includes a cap, a sleeve slidable on the needle and a retainer cap interconnecting the two. The cap is used for closing the needle to preserve the liquid and prevent spillage. The needle is provided with an inner coupler which may consist of two slightly spaced beads fixed to the needle near the end thereof. There is also provided an outer coupler into which may be fitted an extension tube by means of another inner coupler of the same construction as the first one. The inner coupler may be so mounted on the needle that its extension tube is housed in the inner needle, or it may be reversed so that the extension tube extends from the inner needle to extend the point at which the liquid is dispensed.