摘要:
A system for mounting a device on board ship which experiences normal vibrations of a predetermined frequency and which may be subjected to high intensity shock forces including a plurality of preloaded liquid springs operable in tension and compression and oriented in a truss configuration between the deck of the ship and the device, the casings of the liquid springs having a natural frequency in excess of the normal shipboard vibrational frequencies and by virtue of being preloaded providing rigid linkages for transmitting normal shipboard vibrational frequencies to the device, the preloading being of such a magnitude to permit the liquid springs to yield in either tension or compression when the ship is subjected to high intensity shock forces such as weapons effect pulses, and the liquid springs resetting the device to its normal position relative to the ship after termination of the high intensity shock forces.
摘要:
A fluid shock absorber of either the pneumatic or liquid type having a frustoconical threaded bleed plug for varying the shock absorbing capacity of the shock absorber. A shock absorber construction utilizing air or liquid having a piston which is expandable whereby expansion to the associated cylinder wall exerts a frictional resistance proportional to the variation in back pressure resulting from the variable restricted flow past the frustoconical bleed plug. A liquid-type shock absorber having a self-contained chamber and a frustoconical bleed plug arrangement wherein liquid from the cylinder is forced into the chamber through the frustoconical bleed plug arrangement. In certain embodiments the bleed arrangement is located in the cylinder wall, and in another embodiment it is located in the piston head.
摘要:
A fluid energy absorber device, such as a fluid spring or shock absorber, or a combination of both, having a composite casing of an outer cylinder of molded plastic around an inner high strength plastic cylinder having high strength fibers therein, the high strength fibers extending both longitudinally and circumferentially, with the circumferential fibers preferably being a high strength plastic which will permit the casing to expand radially. The inner cylinder may be a separate plastic cylinder containing the high strength fibers and to which the outer cylinder is bonded, or the inner cylinder may be formed by a matrix of plastic which is a continuation of the outer cylinder. The high strength cylinder may be located between inner and outer plastic cylinders which are fused to each other to encapsulate the high strength cylinder. A method of fabricating a fluid energy absorber device having a high strength composite casing including the steps of providing a tubular high strength inner member having high strength fibers therein, mounting the inner member on a mandrel, and forming an outer plastic cylinder about the inner member so that the resulting casing includes an outer plastic cylinder and an high strength inner cylinder having high strength fibers therein. The method may include mounting the high strength member on a plastic cylinder which was previously mounted on the mandrel, and thereafter forming the outer plastic cylinder so as to cause its ends to fuse to the ends of the inner plastic cylinder to encapsulate the high strength member.
摘要:
A liquid spring unit operable in both tension and compression including a cylinder, compressible liquid in the cylinder, a piston and a seal for the piston, a first sleeve mounted for telescopic movement with respect to the cylinder, a collapsible housing consisting of a second sleeve mounted about the first sleeve and a third sleeve mounted on the second sleeve, a first attachment member mounted relative to the first sleeve for attachment to a first external member, a second attachment member on the third sleeve for attachment to a second external member, a stop for preventing the second and third sleeves from extending beyond a predetermined length when tension forces are applied to the first and second attachment members, a slidable connection between the second and third sleeves for permitting the housing to collapse when compressive forces are applied to the first and second attachment members, and a connection between the piston and the housing for driving the piston into the cylinder when both tension and compression forces are applied to the unit.
摘要:
A shock absorber including a casing, a piston rod having a portion in the casing, a piston head mounted on the piston rod for dividing the casing into chambers on opposite sides thereof, a piston head having a central bore therein having an inner peripheral surface which flares outwardly at opposite ends thereof, and a plurality of interspersed grooves and ridges on the piston rod within the bore for permitting flow of liquid between the chambers to thereby provide fluid amplification through the spaces between the inner peripheral surface of the piston head and the outer peripheral surface of the piston rod.
摘要:
A molded plastic cylinder for an energy absorber, fluid cylinder, or the like, which includes a main body portion having a first outer diameter and a first thickness, and an end portion formed integrally with the main body portion and having a second outer diameter which is less than the first diameter and also having a second thickness which is not substantially greater than the first thickness, an internal shoulder located substantially at the junction of the main body portion and the end portion, and an external thread on said main body portion in a low stressed area of said cylinder for attaching said cylinder to an external structure.
摘要:
An end cap for a cylinder including a body portion having an outer surface and first and second ends, a bore extending between the first and second ends, an annular sealing lip surrounding the bore, an annular recess surrounding the annular sealing lip, an annular outer body portion surrounding the annular recess, with the annular recess permitting radial flexing of the annular outer body portion both toward and away from the annular sealing lip, and an annular barb on the outer surface extending circumferentially about the annular outer body portion for reception in a mating groove in the cylinder.
摘要:
A liquid shock absorber device including a plastic cylinder having first and second ends, a piston rod having a first end within the cylinder and a second end externally of the cylinder, a plastic seal formed integrally with the cylinder at the first end and defining an opening for receiving the piston rod in sealing relationship, a closure for closing the second end of the cylinder, and fluid in the cylinder. The closure on the second end may have a piston associated therewith for preloading the fluid.
摘要:
A liquid spring shock absorber is provided with an improved piston head-piston rod assembly free of stress force concentrating design features. The shock absorber assembly further includes a slidably extending member for the accomodation of tension loads.
摘要:
A spring consisting of a rope having a plurality of strands each containing a plurality of monofilaments, and a cured binder which has saturated the rope under pressure to cause it to be self-sustaining in spring form. A method of fabricating a spring including the steps of providing a conventional rope composed of a plurality of monofilaments, saturating the rope under pressure with a binder to form a combined rope and binder, forming the combined rope and binder into a predetermined spring shape, and curing the binder to cause the spring to be self-sustaining in the formed predetermined spring shape. A self-damping spring formed by the foregoing method wherein the rope is of the twisted type, and the amount of damping being dependent on the angularity of the twisting. A spring consisting of a first portion of a rope impregnated with binder to hold the spring in a self-sustaining shape and an untreated second rope portion formed integrally with the first portion.