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.

Abstract: A pipe coupling is provided that facilitates an operation of opening or closing a ball valve and suppresses damage to a cylindrical seal member by the ball valve when rotated, thereby enabling an improvement in durability. A socket fluid passage (4) in a socket (1) is opened or closed with a ball valve (5). A cylindrical seal member (11) is disposed in a primary fluid passage portion (4a) of the socket fluid passage (4) in such a manner as to be in pressure contact with the ball valve (5) to seal between the ball valve (5) and the inner wall of the socket fluid passage (4). The ball valve (5) is rotatable to open when the socket (1) and a plug (2) are locked to each other by a lock mechanism (16).

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: A seal ring of an on-off valve of a pipe coupling is prevented from separating from the on-off valve even when a fluid flows at high speed around the seal ring. When an on-off valve 26 is in the closed position, a seal ring 50 is sealingly engaged under pressure with an annular valve seat surface 34. A forward annular valve surface portion 52 located forward of the seal ring and a rear annular valve surface portion 54 at the rear of the seal ring respectively have a forward annular passage limiting portion 56 and a rear annular passage limiting portion 58 that are adapted to be in contact with or close proximity to the annular valve seat surface. During the period from when the on-off valve starts to move from the closed position (FIG. 4) toward the open position (FIG.

Abstract: A magnetic armature is attracted and driven by a magnetic force which is intermittently generated between magnetic poles, and a piston reciprocated by being pushed back by a coil spring is not rotated by the coil spring. When the magnetic armature (28) as attracted between the magnetic pole members (10,12) by the magnetic force comes to a predetermined rotational angle position about the axis, the armature receives a rotational torque that is derived from the magnetic force and acts in a direction opposite to that of the rotational torque applied by a coil spring (30), thereby preventing the armature from being rotated in the predetermined direction. More specifically, the armature (28) has a circular cross-section as a whole and has a chamfered part (28?) parallel to the axis. When the chamfered part enters between the magnetic pole members, the armature receives a rotational torque that is derived from the magnetic force.

Abstract: A female coupling member is provided for a pipe coupling that handles a high-pressure fluid. The female coupling member has collet-type locking members capable of correctly connecting the female coupling member and the associated male coupling member. The male coupling member receiving portion 22 has an inward inner surface 35-2 that slidingly engages a forward end outer peripheral surface 12-2 of the male coupling member 12 when the male coupling member 12 is inserted into the male coupling member receiving portion 22 and before as the male coupling member 12 reaches a position where the engaging portion 12-1 of the male coupling member 12 is engaged by the latch portions 32-1 of the locking members 32.

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: The present invention provides a chip breaker for reliably breaking chips produced during a cutting operation by an annular cutter. Disclosed is a chip breaker having a surface (26) facing the upstream side of the rotational direction of an annular cutter and extending outward relative to the radius of the annular cutter from an edge (24) adjacent to the outer peripheral surface of the annular cutter. The edge (24) is inclined from a first end (27) positioned at a small distance from the outer peripheral surface of the annular cutter toward a second end (28) positioned closer to the surface of a workpiece than the first end and spaced at a greater distance from the outer peripheral surface of the annular cutter than the first end.

Abstract: An impact tool enables a front cover part to be easily attached to and detached from a housing body, with a device having a simplified structure. The front cover part has an annular fastening portion clamped to the outer peripheral surface of a front edge portion of the housing body, a cylindrical portion extending from the front end of the housing to the region of the fastening portion, and a connecting portion connecting together the cylindrical portion and the fastening portion. The fastening portion is split at a circumferential part thereof to form a pair of circumferentially opposing tongue-shaped portions. A clamping device is provided between the tongue-shaped portions, which is movable between a clamping position where it pulls the tongue-shaped portions toward each other and an unclamping position where the tongue-shaped portions are released from being pulled toward each other.

Abstract: A pipe coupling is configured such that when a male coupling member and a female coupling member are to be connected with each other, a valve disposed in the female coupling member is partly inserted into the male coupling member so as to come into press-contact with the valve in the male coupling member, and to cause displacement of the valves, to thereby open a fluid passage in the pipe coupling. An O-ring is provided on the interior surface of the male coupling member. A sleeve is arranged in a female coupling member such that a forward end portion of the sleeve is inserted into the male coupling member in such a manner that the outer surface of the forward end portion of the sleeve sealingly engages with the O-ring, while allowing the valves of the male and female coupling members abut against each other within the forward end portion of the sleeve.

Abstract: An electric drill apparatus having a low profile is provided which comprises an annular cutter, a motor for rotating the annular cutter, a rotary shaft assembly for rotating the annular cutter attached to its leading end about a rotating, a rotation reduction mechanism disposed between the motor and rotary shaft assembly for transmitting a driving force of the motor to the annular cutter through the rotary shaft assembly, a feed mechanism responsive to an operation of a manual handle, for moving the rotary shaft assembly along with a straight line to advance or retract the annular cutter attached to the rotary shaft assembly with respect to a workpiece, and an adhesion base for securing the electric drill apparatus to the workpiece. The annular cutter has a plurality of cutting blades comprised of cemented carbide tips fixed on its lower end, thereby it is capable of rotating at a high speed.

Abstract: A fluid coupler has a female coupler member and a male coupler member which can be connected to the female coupler member by simply being inserted into the female coupler member. The female coupler member includes a first locking ball, a second locking ball and a locking ball confining ring. The confining ring has a first slanted inner surface engaging the first locking ball to partly project the first locking ball into a male coupler member receiving hole of the female coupler. The confining ring further has a second slanted inner surface and a locking ball pressing surface extending in parallel with an axis of the male coupler member receiving hole. In an insertion operation, the male coupler member first engages the first locking ball to press it against the first slanted surface, thereby axially moving the confining ring.

Abstract: A stop ring is made of an elastic member curved substantially in a plane into a ring shape having a first end and a second end spaced apart from each other in a circumferential direction. The first end is bent in a plane to incline inward with respect to a radial direction from the circumferential direction of the stop ring and to extend towards the second end.

Abstract: A coupling member comprises a spherical rotatable valve member installed in a fluid passage thereof, in which the fluid passage is maintained open when a through hole of the valve member is aligned with the fluid passage, while the fluid passage is maintained closed when the through hole of the valve member not aligned with the fluid passage. An annular sealing convex portion is arranged on the outer surface of the valve member, which has larger radii relative to a pivotal axis A than the outer surface, so that the sealing convex portion is fully engaged with an end-opening peripheral edge of the fluid passage only when the valve member is placed in the closing rotational position.