Abstract: An injection device having a propulsion system having a container a compressible substance that when in a compressed state is a primary source of potential energy for propelling a fluid with sufficient pressure through an orifice of the container to create a jet enabling subcutaneous or intracutaneous delivery of the fluid. The potential energy is substantially a compression energy of the compressible substance. The device also including a pressure generating mechanism coupled to the container that compresses the compressible substance and that includes a rotatable member for exerting pressure on the compressible substance.

Abstract: An injection device having a propulsion system comprises a container, a re-usable pressure generating mechanism and a source of potential energy for propelling a fluid with sufficient pressure through an orifice to create a jet enabling subcutaneous or intracutaneous delivery of the fluid, the source of potential energy primarily in the form of a compressible substance that is put under pressure within the container by the pressure generating mechanism, whereby said potential energy is substantially compression energy of said substance, wherein said substance is liquid, solid, or other non-gaseous substance as defined at ambient temperature and said pressure.

Abstract: An injection device including a nozzle portion with an orifice, an ampoule containing a liquid to be injected, a piston, a retainer, and a force generator for generating at least two forces, including a movable partition slidably on the piston, a partition fixed to the piston, and a spring element between the moveable and fixed partitions, one of the least two forces sufficient to propel the liquid through the orifice in a jet of liquid having sufficient speed to pass through a patient's skin, and the other of the at least two forces sufficient to inject the liquid to a selected depth under the skin.

Abstract: An injection device with a propulsion system comprising a source of potential energy and a mobile pressure transmitting member for applying sufficient pressure on a liquid to be injected for propelling the liquid to be injected through a nozzle orifice at a velocity sufficient for transdermal injection, the source of potential energy comprising a spring member adapted to be elastically compressed against a wall portion of the mobile pressure transmitting member, wherein the spring member comprises a block of reticulated polymer.

Abstract: An injection device having a propulsion system comprises a container, a re-usable pressure generating mechanism and a source of potential energy for propelling a fluid with sufficient pressure through an orifice to create a jet enabling subcutaneous or intracutaneous delivery of the fluid, the source of potential energy primarily in the form of a compressible substance that is put under pressure within the container by the pressure generating mechanism, whereby said potential energy is substantially compression energy of said substance, wherein said substance is liquid, solid, or other non-gaseous substance as defined at ambient temperature and said pressure.

Abstract: A propulsion system suitable for a single-use or a multi-use needleless injection device comprises a container and a source of potential energy for propelling a fluid (2) with sufficient pressure through an orifice to create a jet enabling subcutaneous or intracutaneous delivery of the fluid, the source of potential energy primarily in the form of a compressible substance (7) under pressure within the container. The compressible substance is preferably a polysiloxane or vulcanized silicon rubber.

Abstract: A device and method for removal of organic deposit obstructions in blood vessels by use of a supersonic microjet liquid flow for canalizing the organic deposit obstruction to be removed. The device has a bendable tube insertable into a blood vessel in which an obstruction is to be removed. Within the tube extends a pressure-resistant duct having an outlet or nozzle orifice developed therein by a liquid under pressure provided from a pump. A small collapsable balloon, when inflated, centers the outlet and isolates a volume within the blood vessel upstream of the outlet for containing the microjet fluid and matter from the obstruction eroded and abraded from the deposit during canalizing. The volume is evacuated by a suction on the tube taken by a pump and the small balloon is inflated through the bendable tube with which it communicates.

Abstract: A laser comprises a prismatic or cylindrical metal box surrounding two correspondingly shaped stacked blocks of nonconductive material with a dielectric constant of 80 or more, the two blocks being separated by a first metal plate forming a first capacitor with one block and with a second metal plate resting on the opposite end face thereof while forming a second capacitor with the other block and with the base of the box. The cover of the box spacedly overlies the second metal plate and is insulatedly traversed by a conductive stud contacting the second plate whereby a direct-current source can be connected across the two stacked capacitors.

Abstract: A laser designed to emit a pulsed beam of short wavelength comprises two bodies of nonconductive material within a cylindrical housing, at least one of these bodies being a flat ceramic disk with a high dielectric constant. A narrow interspace between the two bodies is occupied by two coplanar metal layers with confronting rectilinear edges forming an elongate excitation cavity between them, these layers being galvanically interconnected through an inductance and constituting a pair of capacitors with a common metal layer on the opposite face of the ceramic disk. One of the coplanar layers is connected to a source of high potential, the other of these layers being intermittently energizable by a generator of trigger pulses to excite a gas filling the elongate cavity.