Abstract: A female coupler suitable for use with a high pressure fluid is provided. The female coupler has locking members or balls adapted to be forced into engagement with a male coupler inserted into the female coupler by a sleeve or outer movable member. The sleeve is held by holding members or balls until the male coupler is inserted into the female coupler and a locking ball receiving recess formed in the exterior surface thereof is brought into a position for receiving the locking balls therein. Accordingly, the sleeve is prevented from moving to a position for forcing the locking ball into the locking ball receiving recess even if the male coupler is suddenly moved out from the female coupler, which is a problem that can occur in prior art female couplers. Further, the sleeve is provided with handle.

Abstract: The invention of this application provides a pneumatic tool with a simple structure. The tool has a tubular housing (50), a stationary shaft (52), a first piston (56) slidable along the stationary shaft, a second piston (58), a tool attachment member (60) drivingly connected to the second piston, a compressed air supply path (70) extending through the stationary shaft to supply compressed air between the first and second pistons, and an air discharge path (76) for discharging the compressed air supplied between the first and second pistons to the outside of the housing when the first and second pistons are separated by a predetermined distance. The compressed air supply path has an axial portion (70a) in the stationary shaft and a radial portion (70b), a compressed air inlet recess (70c) in the inner wall surface of a shaft sliding hole, and a supply outlet (70d) extending forward from the forward end of the compressed air inlet recess and communicating with a portion between the first and second pistons.

Abstract: It is an object of the present invention, in an electromagnetic reciprocating fluid device in which a movable member is equipped with permanent magnets, to resist a torque rotating the movable member about an axis thereof in the reciprocating direction. The electromagnetic reciprocating fluid device has a pair of electromagnets 28, 28? facing each other, and permanent magnets 26, 26? disposed in a space between the opposed electromagnets and held by a movable member 27. When an alternating current is applied to coils 34 formed in the electromagnets, a magnetic force is generated between the electromagnets and the permanent magnets, whereby a driving force for reciprocation is applied to the movable member. One end of the movable member is connected to a piston 18 of a first piston-cylinder assembly 12, while the other end is connected to a piston 18? of a second piston-cylinder assembly 12?.

Abstract: A female coupling member is provided which includes locking members (32) for securing the female coupling member to a male coupling member (12) inserted into a receiving portion (22) thereof. The receiving portion has an inner surface (35-2) that slidingly engages a forward end outer surface (12-2) of the male member (12) when the male member is inserted into the receiving portion (22) and before it reaches a position where the male and female members are secured to one another by the locking members (32). The receiving portion further has a forward end inner surface (20-1(2)) that slidingly engages an outer surface (12-3) of the male member that is more rearward of the forward end outer surface (12-2) than the engaging portion (12-1) of the male member when the inward inner surface slidingly engages the forward end outer surface (12-2) of the male coupling member.

Abstract: A slide type guide mechanism in which an adjusting screw member for eliminating looseness can be automatically tightened. The slide type guide mechanism includes a guide 22 which is provided with a guide groove 30 having a first guide side surface 26 and a second guide side surface 28 extending along straight lines parallel to each other, a threaded hole extending from an outer side surface of the guide toward the guide groove through the first guide side surface 26 , a slide 24 which is guided by the guide groove, a screw member threadably engaged in the threaded hole and rotated so as to urge the slide in a direction from the first guide side surface toward the second guide side surface of the guide groove, a torque applying device 54 having a spring for applying to the screw member a torque by which the screw member is rotated so as to move toward the guide groove.

Abstract: A rotary cutting machine 10, if inclined at large angles, provides positive supply of a cutting oil and avoids leakage of the cutting oil. The machine 10 has a machine body 14 and an arbor 18. An oil tank 50 is mountable to the machine body 14 so that the oil tank 50 is oriented at a given angular position about the central axis of the arbor 18. The tank body 54 has an interior space. The interior space is divided into a first interior part and a second interior part by an imaginary plane containing the central axis of rotation of the arbor. The first interior part is less in volume than the second interior part.

Abstract: A pneumatic body treating device 12 of a pneumatic body treating apparatus includes a plurality of airtight chambers 16, 18, 20, and 22 to and from which pressurized air is supplied and discharged, a hose 21 having a connecting end connectable to a pressurized air source 148 of a pneumatic body treating apparatus body 14, and a plurality of electromagnetic valves 24, 26, 28, and 30 which are connected between the hose and the airtight chambers 16, 18, 20, and 22, respectively, and which supply pressurized air from the hose 21 to the corresponding airtight chambers and discharge the pressurized air from the corresponding airtight chambers. With this arrangement, it is possible to reduce the number of connecting hoses for supplying pressurized air to the pneumatic body treating device which, when used, is worn around the upper limbs and the lower limbs.

Abstract: There is provided a valve holding member for holding a valve of a pipe coupling. The valve holding member includes a hub part 33 having a guide hole 34 for a valve stem, two arm parts 32 diametrically opposing each other on the peripheral edge of the hub part, and spring holding parts 31 formed at the peripheral edge.

Abstract: An object of the present invention is to provide an electric screwdriver device having a function for determining that a correct tightening operation has been carried out when the tightening operation has taken a time longer than a reference time predetermined for the tightening operation, characterized in comprising a novel feature for determining the reference time.

Abstract: A pipe coupling is disclosed which comprises a plug (14) and a socket (12). When the plug is inserted into the socket, the plug first urges sleeve actuators (28) radially outward to axially move a sleeve (22) and, thereafter, urges locking elements (20) radially outward to move the sleeve further. Eventually, the locking elements and sleeve actuators are fitted within a locking recess (14-2) of the plug to securely connect the plug and the socket.

Abstract: An object of the present invention is to provide an electric screwdriver device having a function for determining that a correct tightening operation has been carried out when the tightening operation has taken a time longer than a reference time predetermined for the tightening operation, characterized in comprising a novel means for determining the reference time.

Abstract: A power screwdriver (10) includes a bit holder (14) bored to receive the shaft of a screwdriver bit (12) and adapted to securely hold the screwdriver bit (12) in place, and a housing (18) having a through cavity (16). The bit holder (14) is inserted into the through cavity (16) so that the bit holder (14) is rotatable about and movable along the axis of the bit holder. This arrangement securely holds the screwdriver bit and thus, minimize rattling of the screwdriver bit during rotation.

Abstract: An object of the present invention is to provide a plug/socket assembly in which the plug will never pull out of the socket even if an excessive pull-out force is applied to the plug. A plug/socket assembly (10) comprises a plug (20) and a socket (30) for receiving and fixing the plug (20) therein. The socket (30) includes a socket main body (31) having a plug insertion hole (311), balls (32) which are provided with the socket main body (31) in a radially displaceable manner with respect to the plug insertion hole (311), a sleeve (33) which is mounted over the outer surface of the socket main body (31) and is displaceable along the axial direction of the plug insertion hole (311), and a compression spring (34) for urging the sleeve (33) along the axial direction toward the inlet port (313) of the plug insertion hole. The inner surface of the sleeve is provided with a slide surface (332). The slide surface has first to fourth regions (P1-P4).

Abstract: A male coupling member is provided that is selectively couplable to a first female coupling member (for 25 MPa, for example) and a second female coupling member (for 90 MPa), which handle different fluid pressures. When the male coupling member is coupled to the first female coupling member, a second O-ring that is provided for the second female coupling member is prevented from being displaced by the fluid supplied from the first female coupling member. A through-hole (70) is provided therein with an O-ring retaining member (82) that is displaceable between an advance position (FIG. 3) where the O-ring retaining member is positioned radially inside the second O-ring (78) to prevent the second O-ring (78) from being displaced by the fluid flowing from the first female coupling member (20?) through the through-hole when the male coupling member is coupled to the first female coupling member (20?), and a retract position (FIG.

Abstract: The present invention provides a slide type guide mechanism in which an adjusting screw member for eliminating looseness can be automatically tightened. The slide type guide mechanism includes a guide 22 which is provided with a guide groove 30 having a first guide side surface 26 and a second guide side surface 28 extending along straight lines parallel to each other, a threaded hole extending from an outer side surface of the guide toward the guide groove through the first guide side surface 26, a slide 24 which is guided by the guide groove, a screw member threadably engaged in the threaded hole and rotated so as to urge the slide in a direction from the first guide side surface toward the second guide side surface of the guide groove, a torque applying device 54 having a spring for applying to the screw member a torque by which the screw member is rotated so as to move toward the guide groove.

Abstract: A coupling has a socket and a plug that is inserted into and connected to the socket. The socket has a locking element and a sleeve actuating element that are radially displaceable to lock the plug as inserted into the socket. A sleeve is provided over the outer peripheral surface of the socket. The inner peripheral surface of the sleeve has a locking surface that presses the locking element from the radially outer side into a lock position. Further, the inner peripheral surface of the sleeve has an inclined surface extending in the circumferential direction thereof. As the plug is progressively inserted into the socket, the sleeve actuating element is pushed radially outward by the plug while engaging the inclined surface, causing the sleeve to be displaced in the circumferential direction. Thus, the inclined surface radially aligns with the locking element, and the locking element is pushed radially outward while engaging the inclined surface by the plug inserted progressively.