Abstract: A spray apparatus adapted to be connected to a fluid supply such as a syringe to spray a predetermined pattern of spray fluid to a target area such as the tissues of an animal or human. The sprayer delivers a predetermined dose of a medicament, vaccine or the like to the nasal or other cavity of an animal or human patient. The sprayer includes a base member and a cap member which is connected to the base member. The base member is connectible to the fluid supply. Spray is discharged from the distal or outward end of the cap member. The base member has a central, longitudinal lumen having a predetermined configuration. Fluid traverses the lumen and is discharged through a central aperture of the cap, which also has a predetermined configuration. The cap central lumen and spray discharge aperture are aligned with the base lumen.

Abstract: A pump, comprising an inlet portion having an ingress channel, an outlet portion having an egress channel, a firing portion, and a manifold having a passage in fluid communication with the ingress channel, the egress channel, and the chamber. The firing portion includes a firing cylinder and a firing piston. The firing piston is capable of performing compression strokes and expansion strokes within the firing cylinder. The firing cylinder forms a chamber in which fluid is drawn during an expansion stroke. A high-pressure actuation device drives the firing piston during the compression stroke to expel a high-pressure jet of fluid from the egress channel. If an injector device is held proximate to flesh, the jet of fluid has sufficient pressure to hypodermically inject the fluid without a needle. The inlet portion, outlet portion, and firing portion of the pump can be rearranged on the manifold to conform to the design requirements for a variety of slap injectors.

Abstract: An implanter for inserting implants such as microchips, medicants or other such devices under the skin of animals or humans. The implanter has a tubular implanter body with an interior wall which has a feature for retaining the implant, a hollow needle integral with the implanter body, and a push rod which engages the implant and pushes it through the hollow needle and into the animal or human. One end of the push rod is bent so that when the push rod is operationally disposed in the implanter body, the bent end is forced to become nearly straight, which provides friction force between the push rod and the interior wall of the implanter body to keep the push rod from falling out of the implanter body. The other end of the push rod has a knob which the user manually engages to depress the push rod. An implanter of the present invention accommodates typical manufacturing variations in the inside diameter of the implanter body or of the push rod with imperceptible changes in friction load on the push rod.

Abstract: This dripless automatic syringe for dispensing fluids has a barrel for containing the fluid, a nozzle for discharging the fluid, and a housing to which the barrel is attached. A piston rod in the housing carries a rigid sealed piston head in the barrel for pushing out the fluid. Behind the piston head a normally unflexed elastic disc in the housing. The disc flexes when the piston rod moves forwardly under a driving force. The disc unflexes to retract the piston rod and piston head slightly when the driving force stops to create a suction which draws fluid back into the nozzle and thereby prevents dripping. The disc has an integral nipple which frictionally grips the rod to hold it in place, when the driving force ceases. The nipple permits axial rearward movement of the piston rod by an externally applied force for filling the barrel with fluid.

Abstract: This container assembly is closed by removable cover and includes a base formed by two transparent nested cup shaped inner and outer members spaced to define a closed thermal insulation chamber therebetween. The inner member has a diametral partition structure dividing this member into two compartments. The cover has two spaced nipples to which may be connected respectively to an aspiration tube and a needle assembly for discharging fluids or a wash from a follicle or another similar site, into the chambers when the cover is rotated to either one of two positions on the base. The cover may be replaced by a transparent, imperforate cover for reviewing the contents of the compartments by a microscope to detect the presence of an oocyte.

Abstract: This surgical trocar assembly has the needle of a stylet removably disposed inside a first cannula which is inside a second cannula in a concentric array. The needle has a sharp point to pierce a body part to be drained of fluids. A first fitting on the first cannula has a first nipple to engage an aspiration tube when the needle is removed. The fitting has a tenon to engage in a tubular member of a Y-shaped joint structure. The tubular member has a lateral second nipple to engage an end of a wash fluid feed tube. A second fitting on the second cannula engages on the tubular member so that wash water passes through the tubular member between the first and second cannulas. The first cannula has a tapered sharp open end to enter the body part for aspirating fluids therefrom. The second cannula has a tapered end to engage the outside of the first cannula near its tapered open end, and further has lateral openings to discharge wash fluid from the second cannula to the body part.

Abstract: A mixing syringe having an inner cylindrical barrel open at one end, and closed at its other end by a thin, tough, membrane bonded thereto. The barrel may contain a first liquid. A plunger inserted in the barrel has a sliding, sealing head which applies pressure to the liquid to rupture the membrane when the plunger is advanced. The barrel is slidably inserted in an open end of an outer barrel in sealing relationship therewith, and has a tip on the other end of the outer barrel. The outer barrel contains a liquid or other material to mix with the first liquid when the membrane is ruptured. The mixture is discharged from the outer barrel via the tip when the inner barrel is advanced axially in the outer barrel.

Abstract: A dispenser for liquids and viscous fluids has a syringe-like device with a barrel for containing fluid and a nozzle at one end. The plunger is movable axially in the barrel for discharging the fluid. At the inner end of the plunger is a flexible, elastic cap which has an end wall that is normally concave, but which is flattened out under pressure when the fluid is discharged. When pressure on the cap is removed, the cap reassumes its concave shape thereby creating a suction in the barrel which draws fluid back into the nozzle to prevent dripping.