Abstract: An injection gun especially useful for injecting low volume, high pressure shots of bone cement. The gun includes a cylindrical housing with a plunger including a plunger rod extending axially through the housing. The plunger rod includes a segment which is provided with an axial series of notches. A ratchet block is slidable axially within the cylindrical housing and is concentric with the plunger rod. The ratchet cylinder mounts at least a ratchet pawl urged against the plunger rod and adapted to engage and lock into the series of notches for forward movement. A pistol grip extends from the cylindrical housing, and a lever is pivoted thereto with an extension of the lever engaging the ratchet cylinder for advancing the plunger. A second ratchet pawl is mounted on a fixed member of the cylindrical housing for retaining the plunger against rearward movement when the pawl in the ratchet cylinder is disengaged from the rod.

Abstract: A cartridge assembly for a syringe-type medication dispensing unit includes a cartridge having a cartridge body with first and second ends. A pierceable membrane is mounted at the first end and a piston is mounted at the second end, with a volume of medication contained in the cartridge body between the membrane and the piston. A cartridge holder receives the cartridge and defines first and second ends. The first holder end defines a central opening and an external thread for mounting a double-ended needle. The second holder end defines an external thread for securing the holder to a medication dispensing unit and an actuating shoulder. The holder frictionally engages the cartridge to form an assembly which can be handled as a single modular unit with the cartridge held securely in the holder by frictional engagement.

Abstract: A manually driven syringe for injecting fluids under high pressure is described that includes a barrel (12), a plunger (13) that is received within the barrel and extends rearwardly through an aperture (28) in the body (27) of a handle (14) which carries a pair of opposed finger grips (19, 22). The finger grips are located rearwardly of the barrel and laterally of the shaft (19) of the plunger, elongated so as to each accommodate two fingers, and angled rearwardly. This design minimizes the distance between (a) the inner edges of the grips and (b) the grips and the head of the extended plunger, thus making the syringe easier to grip in the palm of the hand and enabling the syringe to be gripped strongly between the fingers and the palm.

Abstract: The present invention relates to a device for dispensing a fluid from a container by means of the axial movement of a piston within the container under the influence of a plunger moved by the device, which device is adapted to receive the container on its forward end and to move the plunger axially forward towards or within the container so as to dispense a selected amount of fluid from the container upon each actuation of the device, characterized in that the device comprises:i. a disengageable drive mechanism adapted to be reciprocated axially of the device and adapted to positively engage the plunger whereby the plunger can be moved axially forward by the drive mechanism and to be disengaged from the plunger to permit relative axial movement between the drive mechanism and the plunger;ii. a disengagement means for selectively engaging or disengaging the drive means from the plunger;iii.

Abstract: A syringe is provided with a helical spring, which furnishes an upper limit to a pressure employed via a plunger to move a fluid or paste through an opening in a syringe. The plunger is maintained in a low compressing state versus the fluid with the helical spring. A toothed rack is attached to the plunger. The toothed rack is engaged by a ratchet forming part of a lever. The lever is hinged on an axially movable assembly. Actuation of the lever drives the ratchet and therewith toothed rack and plunger forward against the force of the spring. As more force is applied to the plunger the resilient force of the compression spring allows the axially movable assembly to move backward and thus to limit the pressure exerted by the plunger on the fluid. A second ratchet can be provided for preventing a backward motion of the toothed rack while the lever seeks a new point of engagement for the ratchet with the toothed rack.

Abstract: A high pressure anesthetic syringe is provided for use in procedures such as intraligamentary anesthesia wherein a high pressure is generated by a drive mechanism to advance a piston rod in a direction to express liquid anesthesia from a glass carpule, wherein a pressure indicating mechanism is provided by including an elongated stem slidably mounted within the piston rod of the syringe and wherein pressure applied to the liquid anesthetic is indicated by relative movement between the elongated stem and the piston rod.

Abstract: A precision injection system and method for intralignmental anesthesia and the like having a syringe with a tubular handle portion to which are removably connectable individually tubular headpieces as a longitudinal extension thereof. The headpieces receive a carpule cartridge with semi-solid contents therein or with liquid injection contents monitored during injections through elongate windows on opposite sides of the headpieces. Provision is also made for injection of known composite materials the viscosity of which cannot be determined by standard viscosity measurement methods. A dosing plunger housed in the tubular handle portion in a retracted start position is activated by a servo-dosing lever and advances incrementally axially into a mounted headpiece for delivery of metered quantities of the contents of the carpule cartridge each time the servo-dosing lever is actuated.

Abstract: An infusion pump for controllable long-term injection of solutions from a syringe which can be emptied in a controlled manner for use with medical drugs in large doses. The infusion pump has a holding device for at least one syringe and an actuating device for the piston of the syringe which is connected to an electrical control drive, and an electrical battery for the drive. The actuating device is provided with a storage device for mechanical work acting through a detent member in the sense of the drive. The electrical control drive is adapted to release a retarding device when switched on, and to actuate the retarding device when switched off.

Abstract: A multiple, metered dosage device having an elongated body provided adjacent one end with a compartment or an ampule to contain material to be dispensed, a piston movable against the material to discharge it from a nozzle, a rod-like plunger movable by a pressure device against the piston to discharge material and a combination stop and release unit movable intermediately of the ends of the body between depressed and elevated positions respectively to engage a pair of racks of teeth on the plunger and including first and second teeth respectively engageable with the racks of teeth sequentially to permit the pressure device to advance the plunger and piston in similar metered, precise or predetermined increments of feeding in discharge direction and then stop the feeding movement and maintain such stopped position until the stop and release unit next is depressed.

Abstract: The present invention relates to a pistol grip implanter device adapted for insertion of a solid or semi-solid pellet form medicament into a domestic animal, associated with a hub for an encasement containing a multiplicity of dosage unit pellets of the medicament.

Abstract: An adjustable stop for gripping a rod at selected locations intermittent the length of the rod, including a base member with a pair of longitudinally spaced openings for receiving a rod having a longitudinal axis. A clamp member is provided with an opening located between the base member openings for receiving the same rod. A cam surface is provided on the clamp member for engaging the base member to misalign the clamp member opening between the two base member openings for gripping the rod with the three openings as the clamp member is rotated about the rod's longitudinal axis when the rod extends through the adjustable stop.

Abstract: A periodontal lavage syringe is provided for self home use by an unskilled patient in the treatment of periodontal disease by irrigation of periodontal pockets or other soft tissue spaces. The syringe may have a single liquid retaining barrel or preferably multiple barrels, each of which contains a dispensible plunger and each of which is filled with a different treatment fluid. The bores communicate with a single liquid outlet to which is attached a flexible needle or tube terminating in a nozzle which is preferably elastomeric. The nozzle is conical in shape, having a pointed tip which enables easy insertion of the nozzle into the periodontal pocket, and tapered walls, the increasing diameter of which limits the depth of insertion of the nozzle within the pocket.

Abstract: A manually operated rotary syringe comprises a fixed base member and a relatively rotable cap member, one of which has an arcuate recess and the other of which carries a mating plug which is received in the arcuate recess in fluid tight relationship with the walls of the recess. Outlet means extend through the stationary base from one end of the arcuate recess such that on rotation of the cap the plug will be caused to traverse the recess towards the outlet to expel the contents of the recess through the outlet means in the base. Means are provided to permit rotation of the cap with respect to the base in only in the direction of operation.

Abstract: An internally powered pump is surgically implanted to eject liquid under control of the experimenter. The pump reservoir is flexible and contains the liquid to be ejected. The reservoir is collapsed by a piston which is pushed by a compressed spring. The spring is released, step-by-step, by a pawl and ratchet mechanism. The pawl is magnetically responsive and pivots when a magnetic field is applied to the pump.

Abstract: A manually operable extrusion press, especially one for producing pasta from a mass of dough, comprises a cylinder with a piston whose piston rod is embraced by flexible prongs of an operating lever that are pivoted to the top of the cylinder opposite a bottom nozzle provided with one or more shaping apertures. The sides of the piston rod facing the prongs have serrations coacting with driving pawls disposed on the inner prong surfaces which are outwardly yieldable during an upswing and engage the serrations on a downswing of the lever, the serrations being also engageable by retaining pawls on the cylinder serving as backstops. A 90.degree. rotation of the piston rod about its axis confronts both pairs of pawls with flat rod surfaces to enable free upward or downward motion of the piston. The entire assembly preferably consists of plastic material such as glass-fiber-reinforced polyamide.

Abstract: An animal feeding device which accepts cartridges containing various gels, pastes, or other similar materials. This device is useful for the oral administration of feeds or medicants to farm animals, especially cattle, in adjustable dosages to fit the individualized needs of animals under treatment.

Abstract: A liquid repetitive dispensing device consisting of a main body containing an elongated square ratchet bar slidably engaged with the main body, the ratchet bar having two adjacent longitudinal faces having ratchet teeth of different pitch. A push button is provided in the main body having an inclined bore containing a spring-biased pawl drivingly engageable with the ratchet teeth responsive to inward movement of the push button. An abutment bushing surrounds and conformably receives the ratchet bar and is adjustably rotatably received in the main body. The bushing is formed with inclined bottom cam surfaces extending toward the ratchet teeth and being engageable by the pawl. The degree of driving engagement of the pawl with the teeth is in accordance with the axially adjusted position of the bushing. A yieldable detent in the main body is selectively receivable in axially spaced recesses in the bushing to lock it in adjusted position relative to the main body.

Abstract: Animal-feeding device which accepts cartridges containing various gels, pastes, or other similar materials. This device is useful for the oral administration of feeds or medicants to farm animals, especially cattle, in adjustable dosages to fit the individualized needs of animals under treatment.