Abstract: A positive-displacement compressor having an automatic system for adjusting compression ratio and designed for installation in a conditioning or refrigeration system for a fluid includes a suction chamber for sucking the fluid with a variable suction pressure, a delivery chamber for delivering the fluid with a delivery pressure greater than the suction pressure, a compression chamber interposed between the suction chamber and the delivery chamber and communicating with the delivery chamber via one or more discharge ports, a compression element to compress the fluid to the compression pressure, a motor driving the compression element, and an adjusting system of the compression ratio.

Abstract: A positive-displacement compressor having an automatic system for adjusting compression ratio and designed for installation in a conditioning or refrigeration system for a fluid includes a suction chamber for sucking the fluid with a variable suction pressure, a delivery chamber for delivering the fluid with a delivery pressure greater than the suction pressure, a compression chamber interposed between the suction chamber and the delivery chamber and communicating with the delivery chamber via one or more discharge ports, a compression element to compress the fluid to the compression pressure, a motor driving the compression element, and an adjusting system of the compression ratio.

Abstract: The present invention relates to a radiopaque and aseptic material for impression-taking. Moreover, the present invention relates to the use of said material in implantodontics.

Abstract: A volumetric compressor comprising: a casing provided with a suction chamber and a delivery chamber, between which a pair of screw rotors is included; a pan containing oil, and a delivery adjustment unit equipped with a slide valve, cooperating with the rotors and with a fluid-operated actuator, in which it is possible to identify an active chamber with a sliding piston connected to the slide valve. The adjustment unit comprises a flow switching unit, that connects the active chamber of the actuator to the pan and to the suction chamber and comprises a static flow switch removably associated with a switching solenoid valve electrically connected to a control unit. The switching solenoid valve is suited to be associated, alternatively, with different static flow switches that make it possible to obtain deliveries of compressed fluid varying discretely or continuously, depending on the position of the slide valve with respect to the rotors.

Abstract: A volumetric compressor comprising: a casing provided with a suction chamber and a delivery chamber, between which a pair of screw rotors is included; a pan containing oil, and a delivery adjustment unit equipped with a slide valve, cooperating with the rotors and with a fluid-operated actuator, in which it is possible to identify an active chamber with a sliding piston connected to the slide valve. The adjustment unit comprises a flow switching unit, that connects the active chamber of the actuator to the pan and to the suction chamber and comprises a static flow switch removably associated with a switching solenoid valve electrically connected to a control unit. The switching solenoid valve is suited to be associated, alternatively, with different static flow switches that make it possible to obtain deliveries of compressed fluid varying discretely or continuously, depending on the position of the slide valve with respect to the rotors.

Abstract: A volumetric compressor of the type comprising a pair of rotors cooperating with each other and housed inside a compressor body, in which it is possible to identify a first flange, arranged on the suction side of the compressor body, and a second flange, arranged on the delivery side of the compressor body, suited to couplingly house a suction head and a delivery head of the volumetric compressor, wherein the suction head is provided with a first counterflange, suited to be connected to the first flange, and comprises a coupling element for connection to a suction pipe, or a coupling element for connection to a suction pipe in combination with a motor unit, and the delivery head is provided with a second counterflange, suited to be connected to the second flange, and comprises a coupling element for connection to a delivery pipe, or a coupling element for connection to a delivery pipe in combination with an oil separator.

Abstract: Volumetric compressor comprising a casing forming an intake chamber and a delivery chamber, a pair of screw rotors coming between the intake chamber and delivery chamber, a container for containing a high-pressure fluid, associated with the casing, a capacity regulating device associated with the casing, which includes a slide valve cooperating with the rotors, a fluid-operated actuator comprising a cylinder complete with a bottom and a head with a through hole for the passage of a stem having one end associated with a piston sliding inside the cylinder and the opposite end associated with the slide valve, channels obtained in the cylinder, a pipe for delivering the fluid, which connects the container to one of the channels and outlets for the fluid which connect the channels to the intake chamber, shut-off solenoid valves installed inside the outlets and a control unit connected to the shut-off solenoid valves.

Abstract: The present invention relates to a radiopaque and aseptic material for impression-taking. Moreover, the present invention relates to the use of said material in implantodontics.

Abstract: A crosslinkable silicone compound including: a crosslinkable silicone polymer, constituted by polyorganosiloxane; a crosslinking agent, constituted by polyhydrogen organosiloxane; a platinum catalyst; and a synthetic sodium-aluminum zeolite. The compound is completed by inhibitors and/or fillers and/or release agents and/or colors and/or plasticizers and/or additives to modify its rheological characteristics.

Abstract: The compound for the correct taking of dental impressions is in a liquid solution and includes a surface-active substance, compatible with silicone materials, combined with a solvent. A very light color and a flavoring agent are advantageously added.