The invention relates to a coupling for connecting construction parts, a truss provided therewith and associated meth od and use. The coupling comprises a female and a male coupling part. The female coupling part comprises: a tubular receiving part, the wall of which an opening is provided; a ball which is placed in the opening and which is movable in radial direction of the receiving part; and a locking sleeve which is screwed onto and encloses the receiving part and which by being screwed is movable in the longitudinal direction of the receiving part between an opened position, in which the locking sleeve allows movement of the ball in the opening for the purpose of placing/removing the male coupling part into/from the receiving part, and a closed position in which the locking sleeve locks the male coupling part in the female coupling part with the ball, wherein the male coupling part is an elongate pin which comprises in its outer wall a groove for the ball.

A fastener for attaching a magazine to a breech plate, including a circular longitudinal body including at least one protrusion, an upper guide block having at least one slot adapted to cooperate with the protrusion, where the body is provided with a key grip at an upper end and a receiving opening at a lower end, where the fastener is provided with a release position in which the body is in a first rotational position, a set position in which the body is rotated by a first rotational degree from the release position, and a lock position in which the body is rotated by a second rotational degree from the release position. The advantage of the invention is that a magazine can be attached to and removed from an aircraft in a fast and easy way.

A stand (100) is disclosed. The stand (100) may include a first connecting component and a second connecting component. The first connecting component may include at least one fixing element and a chamber. The chamber may have an opening. The second connecting component may include an insertion portion including at least one fixing element and a chamber. The chamber may have an opening. When the insertion portion of the second connecting component is inserted, along an axis in an insertion direction, into the chamber through the opening, the fixing element in the first connecting component may work in pairs with the insertion portion to cause the first connecting component to be connected with the second connecting component.

A fastening apparatus includes an inner casing including slots, an outer casing surrounding the inner casing, a shaft inserted into the inner casing, and fixed rolls between the outer casing and the shaft, wherein the fixed rolls are inserted into the slots, respectively, and a diameter of each of the fixed rolls is greater than a depth of each of the slots.

Bearing assemblies for selectively coupling to surgical instruments are disclosed. In one embodiment, a bearing assembly can include a housing with a cavity, a first race in the cavity that translates but does not rotate relative to the housing, bearing elements disposed in the first race that move radially in and out of a central passage of the first race, and a second race that is fixed in the cavity. The first race can be biased toward an opening of the cavity, the second race can surround the first race with an inner surface having a tapered diameter configured to contact the bearing elements as the first race moves distally relative to the second race and urge the plurality of bearing elements radially inward to selectively lock the bearing assembly to a surgical instrument disposed within the central passage of the first race.

A connector for use with a fall protection system includes a body, a gate, and a double action locking mechanism. The body includes a spine and two arms extending from the spine to form a gate opening, the arms defining axially aligned first and second apertures respectively. The gate is adapted and configured to move axially through the first and second apertures. In an open position, the gate extends through the first aperture, but a forward end of the gate is spaced rearwardly of the second aperture. In a closed position, the gate extends through the first aperture and the second aperture. The double action locking mechanism is adapted and configured to require application of two distinct and different forces to unlock the locking mechanism and permit the gate to move to the open position.

A rotary fastening device includes a rotating axial member and an inertia member. The rotating axial member includes a base body, an input end, an output end and an engaging portion. The input end is disposed at one end of the base body and selectively connected to a wrench. The output end is disposed at the other end of the base body. The engaging portion is disposed on the base body. The inertia member is detachably connected to the rotating axial member, and includes a gravity portion and an engaging hole. The gravity portion is extended toward the output end of the rotating axial member so as to form an annular space. The engaging hole is communicated to the annular space.

A constant velocity universal joint includes outer and inner joint members configured to transmit torque therebetween through intermediation of balls while allowing angular displacement. A power transmission shaft is coupled to the inner joint member. A mounting and dismounting mechanism configured to mount and dismount the power transmission shaft to and from the inner joint member is provided between the inner joint member and the power transmission shaft. The mounting and dismounting mechanism includes a tubular member inserted externally on the power transmission shaft so as to extend from the inner joint member, a fixing member received in the tubular member, and an annular member arranged on an outer periphery of the tubular member. The fixing member is moved in the radial direction along with movement of the annular member in the axial direction so that the fixing member is mountable to and dismountable from the power transmission shaft.

A bolt for clamping abutting parts includes a bolt-like part insertable into openings of the abutting parts and including an external thread on a portion of an outer side of the bolt-like part. The bolt-like part includes a bolt component without external thread so that the bolt extends in each of the abutting parts at least partially with the bolt component without external thread. A threaded sleeve projects radially outwardly beyond the bolt-like part and is positionally adjustable by engaging an internal thread of the threaded sleeve in the external thread of the bolt-like part. A clamping element is provided inside the bolt-like part at an end of the bolt-like part in opposition to the threaded sleeve and is movable beyond an outer circumference of the bolt-like part through a bore of the bolt-like part. An actuator acts on the clamping element in order to clamp the abutting parts.

A connecting mechanism is provided, including a first member, a second member, a first connecting element, a second connecting element, a resilient element, and a ball-shaped element. The first connecting element is connected to the second member. The first connecting element has an opening. The second connecting element is disposed in the first connecting element. The resilient element is connected between the second member and the second connecting element. When the first member moves to a joining position relative to the second member, a column of the first member extends through the opening, and the ball-shaped element is clamped between the first connecting element, the second connecting element and a recess of the column.