Abstract: An upright-type vacuum cleaner includes a cleaner body, a suction brush, cyclone dust collecting apparatus, and a filter. The cyclone dust collecting apparatus is removably disposed in a dust collecting chamber in the cleaner body. The suction brush draws air and contaminants from a surface to be cleaned into the cleaner body. The cyclone dust collecting apparatus induces the air and contaminants into a vortex to separate by centrifugal force large particle contaminants from the air and to collect the contaminants. The filter further filters fine contaminants from the air that is discharged from the cyclone dust collecting apparatus.

Abstract: A sub-suction pipe assembly for a vacuum cleaner includes an air suction pipe connected to a vacuum cleaner body, a sub-suction pipe connected to the air suction pipe and movable along the air suction pipe between a first position and a second position. The sub-suction pipe has a brush attached to an end thereof, a suction extension pipe detachably connected to the end of the air suction pipe, and a lock mechanism for securing the suction extension pipe to the air suction pipe. The sub-section pipe remains coupled to the end of the air suction pipe when the suction extension pipe is connected to the air suction pipe.

Abstract: A closed reciprocating compressor includes a closed container forming an oil storage portion at a lower end thereof. A power generating device disposed in the container reciprocates a piston to compress air. An eccentric shaft is fixed to a lower end of the axle. A hollow oil supply device fixed to the eccentric shaft and extends downwardly therefrom at an oblique angle and into the oil for conducting oil upwardly due to centrifugal force generated in response to rotation of the axle. The oil supply device includes a radially outer portion and a radially inner portion, the radially outer portion being spaced farther from the axis than the radially inner portion. A lower first section of the radially outer portion forms a first acute angle with a horizontal plane and merges at its upper end with a second section of the radially outer portion which forms a second acute angle with the horizontal plane, wherein the second angle is larger than the first angle.

Abstract: A hermetic compressor includes a compressing chamber and a valve plate forming suction and discharge ports communicating with the chamber. A discharge valve has one end fixed to the valve plae and a free end that is flexible to open and close the discharge port. A discharge backer has one end fixed to the valve plate and is positioned to limit the opening movement of the discharge valve. The discharge backer includes integral protrusions projecting toward the discharge valve. One of the projections is in constant contact with the discharge valve and forms a fulcrum therefor.

Abstract: A vacuum cleaner capable of efficiently separating and eliminating dust and dirt is provided. The vacuum cleaner including a body having open and closed spaces divided by a partition, a suction brush connecting port formed on the upper side of the body and interconnected with the open space, an interconnecting hole formed on the partition for interconnecting the open and closed spaces, a motor mounted in the closed space of the body for generating a suction force, and a dirt collecting unit detachably mounted in the open space of the body for centrifugally separating dirt and dust contained in the air sucked in through the suction brush connecting port by the motor.

Abstract: A reciprocating compressor includes a piston reciprocating within a cylinder to compress a fluid. The compressed fluid is discharged through a discharge pipe which is susceptible to being vibrated, e.g., by the operation of a motor of the compressor. To attenuate such vibrations, an anti-vibration coil spring is mounted to the discharge pipe, with the discharge pipe passing through helical turns of the spring. The helical turns define respective outer diameters which are non-uniform along the length of the spring.

Abstract: An electric power cord retrieving mechanism for a vacuum cleaner includes a cord reel rotatable in an unwind direction for paying-out a cord, and in a cord wind-up direction for winding up the cord. A brake is normally urged to a reel- engaged position for preventing rotation of the reel in the cord wind-up direction, and is movable to a reel-disengaged position for permitting rotation of the reel in the cord wind-up direction. A cord button is displaceable by a manual force for moving the brake out of the reel-engaged position. A selector button is mounted on the cord button and is movable between a semi-automatic position wherein the brake returns to the reel-engaged position when the manual force is released from the cord button, and an automatic position wherein the brake remains in the reel-engaged position when the manual force is released from the cord button.

Abstract: A mobile robot capable of recognizing its location and adjusting its direction in response to an obstacle in its way includes a running device, an obstacle detecting device for detecting the presence of an obstacle, a location recognizing device, a controlling portion, and a power supply. The location recognizing device includes a first vision camera directed toward the ceiling of a room and a first vision board. The first vision camera recognizes a base mark on the ceiling. The first vision board processes an image from the first vision camera and transmits the image data to the controlling portion. The obstacle detecting device includes a line laser for emitting a linear light beam toward the obstacle, a second vision camera for recognizing a reflective linear light beam from the obstacle, and a second vision board for processing image data captured by the second vision camera.

Abstract: A self-excited reluctance motor capable of driving a motor with a commutator and without having to use a commutator logic for power electric circuit. The self-excited reluctance motor includes a stator having a plurality of stator poles respectively wound by wires of different phases; a rotator having a plurality of rotator poles formed on an outer circumference thereof, the rotator rotatably inserted in the stator; and a commutator.

Abstract: There is provided a hermetic compressor in which an oil hole is directly formed in an inner wall of a piston hole on which a lateral component force is exerted, thereby intensively performing a lubricating action at the portion which is susceptible to the friction and wear. Further, since the oil hole is formed to penetrate through the side wall of the piston hole, a foreign matter contained in the oil is prevented from being introduced into the piston hole. Further, the friction and wear between the piston and the cylinder block is basically prevented, thereby preventing the lowering of the performance and the deformation of the compressing instrument by the increasing of the interior temperature of the compressor.

Abstract: A hermetic reciprocating compressor has a rigidity increasing portion for increasing the rigidity of a sealed casing of the compressor to control transmission noise that is transmitted through the sealed casing and to reduce the noise of the compressor. The rigidity increasing portion includes an elastic member which exerts elasticity between a compression device portion and a lower shell of the compressor. The elastic member increases the rigidity of the lower shell of the compressor to produce noise controlling effects similar to that which results from an increase in the thickness of the shell of the compressor itself Accordingly, noise and vibration levels are improved by the sealed casing, and the noise of the compressor can be reduced. The elastic member includes a body having an annular hole in contact with the center of the bottom of the lower shell and a plurality of supporting legs extending from the body.

Abstract: A cyclone dust collecting apparatus for a vacuum cleaner includes a hollow cylindrical cyclone body having an open upper end through which air and contaminants are drawn in and a dust discharge port located proximate a lower end of the cyclone body. The dust discharge port receives contaminants that have been separated from the air by centrifugal force and discharged from the cyclone body. The apparatus further includes a dust receptacle connected to the cyclone body for collecting the contaminants discharged from the cyclone body through the dust discharge port. A base member is connected to and closes the lower end of the cyclone body and the dust receptacle, and a cover is removably connected to the upper end of the cyclone body and the dust receptacle. The cover has an air intake channel for drawing in outside air and contaminants into the cyclone body and an air discharge channel for discharging clean air from the cyclone body.

Abstract: A hermetic reciprocating compressor includes a crankshaft stopper with an integrally formed resonance reducer portion. The crankshaft stopper is attached to the upper inner portion of a sealed casing of a compressor to restrict the movement of a motor portion and a compression device portion. The resonance reducer portion of the crankshaft stopper increases the rigidity of the sealed casing by reducing the resonance of the sealed casing. Since the vibration produced and transmitted to the sealed casing during the operation of the compressor is absorbed or damped by the crankshaft stopper with the resonance reducer portion, the resonance of the sealed casing is reduced and/or eliminated. Accordingly, overall noise caused by resonance of the sealed casing can be reduced.

Abstract: A cyclone dust collecting assembly for a vacuum cleaner includes a dust barrel that is detachable from a cyclone body. The cyclone dust collecting assembly includes a cyclone body disposed in a dust chamber of a cleaner body, for separating by centrifugal force a contaminants from air that is drawn through a suction brush, a dust barrel removably connected to a lower end of the cyclone body. The dust barrel communicates with the cyclone body and collects the contaminants. The apparatus further includes a connecting separating portion for removably connecting the dust barrel in the dust chamber to the lower end of the cyclone body.

Abstract: A main shaft bearing lubricating apparatus for a sealing-type reciprocating compressor having a rotor provided to a rotary shaft and rotating about the rotary shaft with respect to a main shaft bearing with a trust washer between, and a reciprocating piston connected to one front end of the rotary shaft through a crank, including a plurality of lubricating grooves formed on the main shaft bearing's front section and each having an intake point and an outlet point that are disposed on different positions by a given angle with respect to the main shaft bearing's center of rotation.

Abstract: An upright type vacuum cleaner has a separately removable dust barrel. The vacuum cleaner includes a suction brush and a cleaner body having a dust chamber, a motor driving chamber housing a motor, an air inflow path, and an air outflow path for interconnecting the upper dust chamber and the lower motor driving chamber. A cyclone body is mounted in the dust chamber, and a dust barrel removably mounted to a lower side of the cyclone body. The vacuum cleaner further includes a fine dust filtering portion removably disposed in the air outflow path. The vacuum cleaner also includes a locking/unlocking portion that detaches the dust barrel from the cyclone body. Accordingly, a user can dispose of collected contaminants and dust without having to remove the entire cyclone dust collecting apparatus, but rather by removing only the dust barrel from the dust chamber.

Abstract: A cyclone dust collecting apparatus for a vacuum cleaner includes a cyclone body and a separately removable contaminant receptacle. The cyclone body, which is fixed to a fan motor portion of a cleaner body, separates contaminants from the air that is drawn into the cleaner body. The cyclone body having a contaminant outlet, through which the contaminants are discharged. The contaminant receptacle is removably coupled to a lower side of the cyclone body and receiving the contaminants through a contaminant inlet that is aligned with the contaminant outlet of the cyclone body. Since the contaminant receptacle is removable independent of the cyclone body, it is smaller, lighter and easier for a user to handle.

Abstract: A vacuum cleaner includes a cleaner body, a suction brush, through which air and contaminants are drawn in, and a cyclone type dust collecting device. The cleaner body has a motor driving chamber and a dust collecting chamber in communication with the motor driving chamber. The cyclone type dust collecting device is mounted in the dust collecting chamber and separates by centrifugal force the contaminants from the air. The cyclone type dust collecting device includes a hollow cylindrical cyclone body having an open top, a closed bottom, and a contaminant outlet. The open top allows air and contaminants into the cyclone body, where the contaminants are separated from the air by centrifugation. The contaminants are then discharged from the cyclone body through the contaminant outlet.

Abstract: A cyclone dust collecting device for a vacuum cleaner includes a cyclone body and a cyclone housing for separating the contaminants from the air. The cyclone housing includes a cyclone cover and a dust collecting container. The cyclone cover has a cylindrical shape, one end of which is coupled to the cyclone body. The other end is a slanted end with a through-hole formed therein and a centrally located dome-shaped protrusion. The dust collecting container also has a slanted end, which is detachably engaged with the slanted end of the cyclone cover. The other end of the dust collecting container is tapered to correspond with the slanted end of the cyclone cover. The slanted end of the cyclone cover protects a grill in the cyclone dust collecting device during operation and removal of contaminants from the dust collecting container.

Abstract: A cyclone type dust collecting apparatus for a vacuum cleaner includes a cyclone body having a cylindrical shape, open upper and lower ends and a contaminant outlet. Air and contaminants are drawn into the cyclone body through one open end of the cyclone body. The contaminants are separated from the air by centrifugal force and are discharged through the contaminant outlet, which is located proximate the other open end of the cyclone body. The apparatus further includes a contaminant receptacle for collecting the contaminants that have been discharged from the cyclone body. The contaminant receptacle has open upper and lower ends and surrounds the cyclone body. A base member is connected to and closes the lower end of the cyclone body and the contaminant receptacle, and a cover is removably connected to the upper end of the cyclone body and the contaminant receptacle. The cover includes an air inlet and an air outlet, both of which communicate with the cyclone body.