The invention relates mainly to an energy absorber for an aircraft seat, notably for a helicopter seat, comprising at least one energy-absorption element having: a first anchor point and a second anchor point, an energy-absorption zone extending between the first anchor point and the second anchor point, said energy-absorption zone being able to stretch as a tensile load is applied between the first anchor point and the second anchor point, characterized in that the energy-absorption zone has a meshed structure comprising a plurality of strands connected to one another by junction portions, and in that at least one junction portion provides a junction between at least three strands of said energy-absorption zone.

A shock absorber wheel system for absorbing vibrations and impacts on precision transport and the translocation vehicles like patient stretchers, new born baby units, portable medical devices in the health sector has a track wheel, a compressive spiral spring absorbing the vibrations and the impacts, an upper spring holder which is connected to the spiral spring and has a spindle at one end and a centering housing at the other end, a lower spring holder which is connected to the spiral spring and has a housing providing connection to the track wheel at one end and has a centering spindle connected to said centering housing.

A spring assembly is provided which decreases the fatigue and wear on the springs of the assembly. The spring assembly includes upper and lower pistons separated by a substantially incompressible fluid. The lower piston is attached to one or more springs. The surface area of the upper surface of the lower piston is greater than the surface area of the lower surface of the upper piston. As such, the springs are deflected by a distance less than the distance traveled by the upper piston. By decreasing the length the springs are compressed, the springs are subject to less fatigue and wear. As a result, the life span of the springs is increased and the maintenance required of the spring assembly is minimized relative to that of typical spring assemblies.

A method for locking an internally threaded end piece such as a head piece, a tail piece, an end or sealing nut to a mandrel for a down hole tool to obviate the need for pins, set screws, and the like, to provide a more robust assembly. In two embodiments the threaded end piece is locked to the mandrel in a swaging operation.

According to some embodiments, a compression strut comprises a first strut body comprising a threaded end and a hollow end, and a second strut body comprising a threaded end and a shaped end. The hollow end of the first strut body is slidably coupled to the shaped end of the second strut body. A spring is disposed between the first strut body and the second strut body configured to resist longitudinal compression of the compression strut. The first strut body is rotationally coupled to the second strut body so that rotation of the first strut body also rotates the second strut body and rotation of the second strut body also rotates the first strut body. A first ball end is threaded to the first strut body and a second ball end is threaded to the second strut body.

A force damper arranged to progressively arrest a first force imparted by an object moving in a first direction is disclosed. The force damper includes a housing enclosure having a first housing end and a second housing end. The first housing end includes a first connection point, and the second housing end includes an opening. A driving member is disposed within the housing enclosure and includes a first shaft end, a second shaft end, and a shaft therebetween. The first shaft end includes a stop and the second shaft end includes a second connection point. A compressible member is disposed within the housing enclosure between the stop and the opening. The compressible member is formed from a material that at least partially undergoes plastic deformation when the first force is arrested and imparts a second force on the stop toward first housing end.

A compression rod engagement apparatus is provided that includes an engagement feature, an engagement feature pin, and a mounting member. The engagement feature is attached to the engagement feature pin. The engagement feature pin is engaged with the mounting member in a home position and axial travel of the engagement feature pin along a lengthwise axis away from the home position in either axial direction is resisted by at least one spring force.

A spring carrier comprising a casing tube having a longitudinal axis; a spring plate, a base plate and a spring disposed inside the casing tube between an upper and a lower boundary element; the lower boundary element having a projection arrangement having retaining projections disposed on the casing tube; the base plate having a recess arrangement on an outer surface facing the casing tube; wherein the projection arrangement and the recess arrangement are arranged such that, in a mounting situation, all the retaining projections are disposed next to the base plate and, in an operational situation, the projection arrangement overlaps with the base plate, wherein a locking projection is disposed inside the casing tube and the base plate has locking recesses facing the casing tube, wherein the locking projection is disposed inside a first locking recess in the mounting situation and a second locking recess in the operational situation.

A cable supporting device can suppress a coil spring from protruding toward an inner circumferential side of a tubular portion of a main body, and can apply, to a nut member, a rotational force in a direction toward a stopper. The cable supporting device includes: a main body including a tubular portion in which a through hole is formed and on which an external thread is formed; a nut member; a stopper arranged on one side in the first direction with respect to the external thread and opposed to the nut member; and a coil spring applying, to the nut member, a rotational force in a direction approaching the stopper. An engagement portion that engages a first end portion of the coil spring is formed in the nut member, and an insertion groove is formed on the outer circumferential surface of the tubular portion.

A flexure is disclosed for accommodating misalignments in an assembly. The flexure can include a first portion, a second portion, and a flexible portion coupling the first portion and the second portion to one another. The flexible portion can facilitate relative movement between the first and second portions in a plurality of degrees of freedom. The flexure can further include one or more stops operable to limit relative movement between the first and second portions in at least two of the plurality of degrees of freedom.