Abstract: Disclosed is a method for providing a dental abutment by using data about a customized abutment, comprising the steps of: receiving oral data about a patient; and acquiring a standardized abutment from a standardized abutment group generated from the customized abutment in correspondence with the inputted oral data about the patient.

Abstract: A linear compressor comprises an external casing forming a compressing chamber, an outer core disposed in the external casing, an inner core assembly disposed inside of the outer core interacting with the outer core, and wherein the inner core assembly comprises an inner core, an upper cover combined to an upper part of the inner core, and a bottom supporting part combined to a bottom part of the inner core. With this configuration, the linear compressor provides a capability of simplifying an inner core assembly, thereby reducing the manufacturing cost.

Abstract: A linear compressor comprises an external casing forming a compressing chamber, an outer core disposed in the external casing, an inner core assembly disposed inside of the outer core interacting with the outer core, and wherein the inner core assembly comprises an inner core, an upper cover combined to an upper part of the inner core, and a bottom supporting part combined to a bottom part of the inner core. With this configuration, the linear compressor provides a capability of simplifying an inner core assembly, thereby reducing the manufacturing cost.

Abstract: A linear compressor with an anti-collision device, which prevents a piston of the compressor from being brought into collision with a cylinder head and/or a suction valve even when the piston moves past an upper dead center position during an operation of the compressor. In one aspect, the anti-collision device may include a resonant spring, an elastic member spaced apart from the resonant spring, and a shock absorbing member having a central hole and set in the central opening of the elastic member. The central hole of the shock absorbing member may be tapered in a direction toward the cylinder head to have a first tapered surface, and the movable member may be tapered at a portion between the resonant spring and the anti-collision device, thus having a second tapered surface corresponding to the tapered surface of the central hole.

Abstract: A linear compressor with an anti-collision device, which prevents a piston of the compressor from being brought into collision with a cylinder head and/or a suction valve even when the piston moves past an upper dead center position during an operation of the compressor. In one aspect, the anti-collision device may include a resonant spring, an elastic member spaced apart from the resonant spring, and a shock absorbing member having a central hole and set in the central opening of the elastic member. The central hole of the shock absorbing member may be tapered in a direction toward the cylinder head to have a first tapered surface, and the movable member may be tapered at a portion between the resonant spring and the anti-collision device, thus having a second tapered surface corresponding to the tapered surface of the central hole.

Abstract: A linear compressor includes a casing, and a cylinder member suspended by springs from the casing. The cylinder member forms a compression chamber in which a piston is reciprocated by a linear motor. The motor includes a first stator situated inside of the piston, and a second stator situated opposite the first stator outside of the piston. The cylinder member comprises spaced apart first and second cylinder blocks with the second stator clamped therebetween. The first cylinder block contains the compression chamber, and the second cylinder block carries a hollow guide extending into the piston, with the first stator mounted on an outer surface of the guide. The piston includes an axial shaft reciprocally guided within the hollow guide. The piston carries a first magnet. A coil disposed between the first and second stators generates a magnetic field passing across the magnet to cause the piston to reciprocate.