The invention relates to a fitting provided on the end of a pressurized hose or pipe. The invention provides a fitting having a spigot and a ferrule part in which opposing recess and projecting parts are provided to engage each other and prevent the two parts unwinding from each other.

A connection between a first tubular member and a second tubular member includes a first tubular end, a second tubular end, a load shoulder member threadable onto the first tubular end, and a nut receivable around the first tubular end and the load shoulder member and threadable onto the second tubular end. The connection also includes a keyway through the load shoulder member and into the first tubular end to receive a key member.

An assembly for a turbine engine. The assembly includes a mount, a nut clamping around the male portion of the mount, a member projecting from the mount and a device for limiting loosening of the nut. The loosening limitation device includes a member for locking the nut against rotation relative to the mount. The rotation locking member includes an inner surface designed to limit rotation of the nut with shape engagement with an outer surface of the nut. The rotation locking member includes a first anti-rotation abutment designed to rotatably abut against the projecting member. The loosening limitation device includes a translation locking member designed to limit translation of the rotation locking member relative to the nut.

Aspects of the present disclosure relate to retainer nut locking apparatus and methods for fluid ends, and associated components thereof. In one implementation, a lock assembly for retainer nuts on fluid ends includes a frame. The frame includes one or more first openings formed therethrough. The lock assembly also includes one or more inserts. Each insert of the one or more inserts is disposed in a first opening of the one or more first openings formed in the frame. The lock assembly also includes one or more insert retainers each having a locking tab protruding into one of one or more slots of each insert to limit rotation of the insert about a longitudinal axis of the insert. The one or more insert retainers are fastened to the frame.

A connecting structure for medical use includes a male assembly 1 and a female connector 2. The male assembly 1 includes a male connector 10 and a threadedly engageable cylinder 20. A male luer portion 11 of the male connector 10 and a female luer portion 2a of the female connector 2 are joined by turning the threadedly engageable cylinder 20 in a tightening direction in a state where a female screw 21a of the threadedly engageable cylinder 20 and an engageable protrusion 2c of the female connector 2 are threadedly engaged with each other. A torque limiting mechanism 50 is disposed between an operation cylinder 30 mounted on an outer periphery of the threadedly engageable cylinder 20 and the threadedly engageable cylinder 20. Engageable teeth 51 are formed in an inner periphery of one end portion of the operation cylinder 30 over an entire periphery. A slit 54 is formed in one end portion of the threadedly engageable cylinder 20. The slit is composed only of a straight portion extending from an end of the threadedly engageable cylinder in an axial direction. An area adjacent to the slit 54 is provided as an elastically deformable portion 52. A first engageable claw 53 engageable with the engageable teeth 51 is formed in the elastically deformable portion 52.

A male connecting device for medical use 1 includes a male connector 10 having a cylindrical configuration and a threadedly engageable cylinder 20 rotatably coupled to the male connector 10. A male luer portion 11 of the male connector 10 and a female luer portion 2a of the female connector 2 are joined by turning the threadedly engageable cylinder 20 in a tightening direction T. The male connecting device 1 further includes a loosening prevention mechanism 40 that prohibits rotation of the threadedly engageable cylinder 20 in a loosening direction L with respect to the male connector 10. The loosening prevention mechanism 40 includes ratchet teeth 41 formed in an inner periphery of the threadedly engageable cylinder 20, an elastic leaf 42 formed in the male connector 10 and extends in a circumferential direction and an engageable claw 43 protruded from a free end of the elastic leaf 42 and engageable with the ratchet teeth 41.

A coupling nut for sealingly engaging a ferrule of a fluid line to a component of a hydraulic system, has: a shank extending along a central axis and having threads to engage a nipple, the threads extending circumferentially around the central axis, the shank defining an inner passage extending along the central axis and sized to receive the fluid line; and a head extending from the shank circumferentially around the inner passage relative to the central axis, the head: defining faces circumferentially distributed about the central axis and edges at junctions between the faces, the faces including torque-transmitting faces each facing a direction having a circumferential component relative to the central axis, and having a cross-section in a plane normal to the central axis, the cross-section defining a plurality of symmetry planes containing the central axis, the torque-transmitting faces free of intersection with the plurality of symmetry planes.

A fluid conduit assembly is provided that includes a first conduit coupler, a second conduit coupler and a lock. The second conduit coupler is mated with the first conduit coupler at a threaded interface. The lock is configured to rotationally fix the first conduit coupler with the second conduit coupler. The lock includes a flange, a clip and a fastener. The flange is arranged with the first conduit coupler. The flange is configured with a plurality of flange apertures arranged circumferentially about an axis of the first conduit coupler. The clip is arranged with the second conduit coupler. The clip is configured with a clip aperture. The fastener is mated with the clip aperture and any one of the plurality of flange apertures.

A coupling includes a male adapter and a female adapter, and may include a nut and a sleeve. In embodiments, the male adapter includes a male adapter inner diameter, and may include threads. The female adapter includes a female adapter outer diameter. The nut or other formation may be configured to engage at least a portion of the male adapter. In embodiments, one or more contact points may be provided between the female diameter outer diameter and the male adapter inner diameter, and the female adapter outer diameter or the male adapter inner diameter may be configured to be out-of-round. The male adapter may include a shoulder and the sleeve may cover the shoulder in connected configuration. Methods for forming a coupling are also disclosed.

A conduit coupling adapter for securing attaching a conduit to an enclosure is disclosed. The conduit coupling adapter generally includes a first end for receiving a conduit and attaching to it via an adhesive, and a second end coupled to the second end comprises threads and is configured for attaching to an enclosure using a locknut.