Abstract: A device for removing calculi by using an intracorporeal lithotripter comprises a single metallic probe or sonotrode which for the fragmentation of calculi is connected with an electrically controlled ultrasonic transducer for generating longitudinal oscillations which alternatively may be switched to the generation of shock or pressure waves by either a pulse wave stimulated oscillation of the metallic probe or sonotrode or by a reversibly driven impact member or projectile which is accommodated by the hollow of a backward tubular extension of the sonotrode.

Abstract: Device for removal of calculi by using an intracorporeal lithotripter comprises a metallic probe or sonotrode which is excited by an electrically controlled ultrasonic transducer for generating longitudinal oscillations for the fragmentation of calculi via the distal end of the sonotrode, the sonotrode accommodating a coaxially arranged impact probe which for an alternative fragmentation of calculi transfers shock or pressure forces that are generated by the impact energy of a reversibly driven impact member or projectile which periodically hits against a mass body on the proximal end of the impact probe when its drive is alternatively switched-on.

Abstract: A device for removing calculi by using an intracorporeal lithotripter comprises a single metallic probe or sonotrode which for the fragmentation of calculi is connected with an electrically controlled ultrasonic transducer for generating longitudinal oscillations which alternatively may be switched to the generation of shock or pressure waves by a pulse wave stimulated oscillation of the metallic probe or sonotrode.

Abstract: A dental abrasive blasting or jet apparatus is provided with an interconnected handpiece having a nozzle arrangement which is supplied with a dental powder as stored in a powder reservoir and delivered under pressure by a gaseous carrier medium via a powder supply line together with a fluid that is supplied via a separate fluid supply line. The apparatus is provided with a separate fluid receptacle or bottle which is filled with a flushing or rinsing liquid for being selectively supplied to the nozzle arrangement of the handpiece via a branch line having a change-over directional valve downstream of a suction pump for supplying the flushing or rinsing liquid to the portion of the fluid supply line that is directly connected with the handpiece.

Abstract: A device for driving a wire pin, and in particular a Kirschner wire, into bone material, comprising a propelling device that acts upon the wire pin which may be inserted into the device from the free front end thereof, said propelling device being driven by periodically repeated impact strokes applied thereupon by an impacting member. The propelling device acts upon the wire pin without any clamping means being involved, which is achieved by the propelling device being designed as a transmitting member against which the free end face of the wire pin may evenly abut and which may transmit the impact strokes of the impacting member as impact pulses into the wire pin through the free end face thereof, with the impact pulses propagating through the wire pin as periodic compression waves so that the wire pin is successively driven into the bone material.

Abstract: In a surgical instrument for the mechanical removal of bone cement (2), comprising a longitudinal housing (4) with a cylinder (6) in which a piston element can be reciprocated by a drive means (14), wherein the piston element on the distal end (18) of the cylinder (6) exerts an impact on a chisel tool supported axially in the housing (4), it is provided that the piston element (10) comprises a projectile (10) adapted to be accelerated to a high final speed and inducing a shock wave into the chisel tool comprising a metallic shock wave transmission probe (22), the probe tip (26) of the chisel tool transmitting the shock wave to the bone cement (2) at a low movement amplitude of the probe tip (26).

Abstract: A metallic flexible probe for use in shock wave lithotripsy is provided next to its head portion and approximately at a transition to an adjoining initial length of the probe with a rated break point for causing without any disturbance of the energy flow along the length of the probe as optimized by different dimensional and material chracteristics of the probe a fracture at a position which most presumably will not lead to harmful injuries of the patient and to no damages of the surrounding lumen of the endoscope which is used in combination with a lithotripter.

Abstract: An ejection device 1 for the high-pressure ejection of a liquid or a liquid containing solid particles, comprising a pressure chamber 13 to accommodate the liquid therein, which opens into an ejection opening 11 and is delimited by a working piston 5. The working piston 5 is, upon application of an elastic impact on its end facing away from the pressure chamber 13, capable of transmitting a compression wave which may displace the pressure chamber-facing end of the working piston 5 by a predetermined displacement stroke into the pressure chamber 13 so that the volume thereof is reduced. The reduction in volume of the pressure chamber 13 is signicantly smaller than the volume of the pressure chamber 13.

Abstract: A handpiece for use in lithotripsy is provided with a probe which as a wave guide transmits shock waves that are produced by an impact force of a projectile acting against a mass body member located at the proximal end of the probe whereby this mass body member is located at the free end of a guide tube for said projectile and adapted for transmitting the impact force from the projectile to said probe the shock waves of which are adapted to cause an intercorporeal fragmentation of calculi.

Abstract: A dental handpiece for use with a prophylaxis treatment of carious teeth by means of a powder mixed with air and water is provided on a gripping sleeve of the handpiece with an integrated powder container which is formed as a closed hollow body of rotation. The hollow body of rotation forms a whirl chamber which spatially acts in all directions for a mixing of the stored powder with air which is supplied substantially in the geometric center of the body of rotation whereas the powder and air mixture which is formed in this powder container is transferred by means of a transfer line to a multiple nozzle arrangement of a spray head of the gripping sleeve via an inlet end of the transfer line which is provided also substantially in this geometric center directly adjacent to the outlet end of the flow line for air, the nozzle arrangement being also connected with a supply line for water.

Abstract: An ejection apparatus for the high pressure ejection of a liquid. The apparatus has the following elements: (a) a pressure chamber for containing the liquid; (b) an ejection opening communicating between an outside and an inside of the pressure chamber; (c) a working piston displaceable in the pressure chamber from a first position at a beginning of a working stroke to second position at an end of the working stroke, having (1) a first end defining a first volume within the pressure chamber when the working piston is at the first position and displacing a second volume, less than the first volume, when the working piston moves from the first position to the second position, and (2) having a second end distal from the first end; and (d) a drive for driving the working piston including (1) an impact member for elastically impacting the second end of the working piston to cause the working piston from the first to the second position and (2) means for accelerating the impact member to impact the working piston.

Abstract: A device for removing calculi by using an intracorporeal lithotripter (1) including a probe (2) transmitting impact waves is characterized by a guiding tube (5) for the probe, which is adapted for introduction into the operating passage of an endoscope and which is provided with a suction and/or extraction passage (8, 9, 10, 15) for removal of the calculi fragmented by means of the probe, for connexion to a suction pump.

Abstract: The device consists of a permanent module (10) and a removable cassette (11). The permanent module comprises a housing (12) with control keys (13) and physical value indicators (14), and two drive hubs (20, 21) for driving two peristaltic pumps mounted in a cassette. The inlet duct (15) of the first pump is connected to a container of physiological liquid, the outlet duct (16) of this pump supplies said liquid to the operating zone, and the duct (17) of the second pump is connected to an operating instrument to drain off the liquid, the duct (18) of this second pump being coupled with a drainage circuit.

Abstract: The device comprises a shock wave generator (1, 2, 3) of the ballistic type comprising a projectile (1) provided to execute a to and fro movement within a guide tube, under the control of pneumatic means (13, 14, 5) disposed at one end of this guide tube. A waveguide (4, 19) exhibits an entrance interface (9) situated at the other end of the guide tube (2) and provided to be struck periodically by the projectile and thus to generate, by ballistic effect, ultrasonic shock waves. This waveguide per se is formed by a metal rod, one end of which forms the abovementioned entrance interface and can oscillate longitudinally within a guide (12), while its other end is provided to act by impact on the object (21) to be destroyed or to be processed.

Abstract: In an ultrasonic generator the driver circuit of a piezoelectric converter is provided with a switching regulator under control of a microcomputer, the pulse duty factor and frequency of the switching regulator being controlled in response to the converter's impedance which is detected by means of a measuring circuit.