Abstract: A grinding machine with a dust collector includes a driving portion, a transmitting portion, a dust-collecting tube, a fender, an air intake connector and a grinding wheel. The dust produced by the rotation of the grinding wheel is sucked by the dust-collecting tube having an inner tube. The inner tube is interconnected with an exhaust vent of the driving portion and the dust-discharging opening. An outlet of the inner tube is parallel to an airflow passage of the dust-discharging opening, such that when an exhaust gas is discharged from the inner tube, a siphon effect is produced at the airflow passage of the dust-collecting tube to suck and collect the dusts produced by the grinding wheel.

Abstract: A pneumatic tool including a cylindrical main body in which a speed-adjusting section is disposed and a hollow barrel-shaped plastic sleeve fitted around the main body. The speed-adjusting section is connected with an inner annular wall axially extending from one end of the speed-adjusting section and outwardly protruding from the main body. Two opposite pin seats having pinholes are disposed on of the plastic sleeve. A pin member is fitted through two lugs of a press lever and the pinholes of the pin seats to pivotally connect the press lever with the plastic sleeve. An annular receiving space is defined between an outer circumference of the annular wall of the main body and an inner circumference of the plastic sleeve. An additional annular muffling member can be fitted in the annular receiving space to enhance the muffling effect.

Abstract: An abrasive wheel with improved structure comprises: an abrasive component, an adapting ring received by the combining hole in the central region of the abrasive component, two covers which are posited about both mounting surfaces respectively, wherein each cover at the surface thereof facing to the corresponding mounting surface has a pressing segment and a blocking segment, wherein each pressing segment comprises a plurality of teeth so that after the disclosed abrasive wheel is assembled, the blocking segment leans against the inner wall of the combining hole and the teeth of the pressing segment lean against the corresponding mounting surface, and further, a plurality of raised columns provided at the surface of each cover facing to the corresponding mounting surface and each opening defined by each two adjacent raised columns which is complementary to the shape of the raised columns so that after the disclosed abrasive wheel is assembled, the raised columns of either the cover can be engaged by the openi

Abstract: A pneumatic grinder with improved muffling structure primarily comprises a driving portion, a grinding wheel fixing portion provided at one end of the driving portion, a first housing connected to the other end of the driving portion by means of a combining portion, a second housing mounted onto the first housing, and a plurality of first and second exhaust openings arranged in staggered fashion respectively on the first and second housings. Said structure allows the pneumatic grinder to discharge waste air through foresaid two layers of exhaust openings in staggered fashion arranged in order to reduce noise during air exhaust.

Abstract: A grinding wheel including a ring-shaped wheel, a first fixing cap, a second fixing cap and a buffer member. The ring-shaped wheel has a fixing section and a working section formed along outer circumference of the fixing section. The first and second fixing caps are respectively mounted on two sides of the fixing section. The buffer member is positioned between the first and second fixing caps for reducing shock produced in operation. The circumference of the buffer member is formed with multiple movable vanes. When the grinding wheel is rotated at high speed, the centrifugal force will deform the movable vanes of the buffer member to lean on the ring-shaped wheel for supporting the working section thereof.

Abstract: A pneumatic buffing machine including a housing having an internal chamber in which a pneumatically driven motor set is mounted. The motor set includes an eccentric block for driving a grinding disc. A skirt shade is screwed under a bottom of the housing by means of outer thread and inner thread. The skirt shade has a large diameter section and a small diameter section. The skirt shade is formed with a central through hole. The eccentric block of the motor set is passed through the through hole and accommodated in the large diameter section. A shoulder section is formed between the large diameter section and the small diameter section and adjacent to the outer thread of the small diameter section. A top end of the small diameter section serves as a stopper section.

Abstract: A controlling mechanism of pneumatic tool. The controlling mechanism is formed with a radial hole in which a speed adjustment button and a direction switching button are disposed. A pad member is disposed between the speed adjustment button and direction switching button. The speed adjustment button is formed with an axial through hole in which a pin member is inserted. One end of the pin member is formed with a through hole. A valve rod is passed through a through hole of an inlet passage of the main body of the pneumatic tool and inserted into the through hole of the pin member. When the pin member is driven, the valve rod is driven to bias a valve plate, whereby the air can get into the main body of the pneumatic tool.

Abstract: A pneumatic pruning hook with a telescopic shank includes a handle having a chamber defined therein and connected to a compressed air source, a valve mounted in the chamber for selectively allowing the compressed flowing into the chamber. The telescopic shank includes an outer tube longitudinally secured to the handle and an inner tube partially slidably received in the outer tube. A work device is secured on the inner tube opposite to the handle. A spiraled hose is received in the telescopic shank and respectively connected the handle and the work device for guiding the compressed air into the work device. A safety is mounted to the work device for selectively engaged to the work device to prevent the work device from an unexpected operation.

Abstract: An air-liquid separating apparatus for compressed air includes a cooling device adapted to be connected to an air source via a first transfer tube. The cooling device includes a liquid cooling tank filled with cooling agent and a cooling tube spiraled in the liquid cooling tank for condensing and separating the mist in the compressed air. An air-liquid separating tank is connected to the liquid cooling tank, wherein the compressed air is cooled and released again in the air-liquid separating tank. The air-liquid separating tank includes a backflow tube connected to the air-liquid separating tank for outputting the compressed air. The backflow tube is provided to carry the heat from the cooling device.

Abstract: An air-liquid separating apparatus for compressed air includes a cooling device adapted to be connected to an air source via a first transfer tube. The cooling device includes a liquid cooling tank filled with cooling agent and a cooling tube spiraled in the liquid cooling tank for condensing and separating the mist in the compressed air. An air-liquid separating tank is connected to the liquid cooling tank, wherein the compressed air is cooled and released again in the air-liquid separating tank. The air-liquid separating tank includes a backflow tube connected to the air-liquid separating tank for outputting the compressed air. The backflow tube is provided to carry the heat from the cooling device.

Abstract: A dust collector of a grinding device includes an inner cover and an outer cover. The outer cover encloses the inner cover and is not extending to a whole periphery of the inner cover, but a notch is formed. The outer cover has a lower edge, and when the dust collector is installed to a grinding device, the inner cover is installed between a grinding disk of a grinding device and a body of the grinding device. The inner cover and the grinding disk define a first chamber. The outer cover enclosing the inner cover and the grinding disk; defining a second chamber with the inner cover and the grinding disk.

Abstract: An air-liquid separating method and apparatus for compressed air. The high pressure air output from an air compressor is transferred through a transfer tube to pass through the cooling tube of a cooling tank. The cooling tube has a diameter larger than that of the transfer tube so that the high pressure air goes from a smaller room into a larger room and the pressure is relieved. The temperature of the high pressure air is lowered due to relief of the pressure and the pressure of the vapor is, approximately the saturated vapor pressure. The cooled high pressure air is further transferred to an air-liquid separating tank. The temperature of the air is lowered to the dew point due to further relief of pressure. At this time, the vapor contained in the high pressure air is condensed into liquid water which drops onto the bottom of the air-liquid separating tank and separates from the air.

Abstract: A dust collector of a grinding device includes an inner cover and an outer cover. The outer cover encloses the inner cover and is not extending to a whole periphery of the inner cover, but a notch is formed. The outer cover has a lower edge, and when the dust collector is installed to a grinding device, the inner cover is installed between a grinding disk of a grinding device and a body of the grinding device. The inner cover and the grinding disk define a first chamber. The outer cover enclosing the inner cover and the grinding disk; defining a second chamber with the inner cover and the grinding disk.