A shock absorber capable of suppressing load fluctuation after the start of plastic deformation. The shock absorber formed of a hollow molded body, including a load input surface; a fixed surface opposed to the load input surface; and a connection surface connecting the load input surface and the fixed surface. The connection surface includes at least one transverse groove rib, the at least one transverse groove rib includes at least two bending induction portions provided at positions where distances from the load input surface are different from each other, the at least two bending induction portions each being convex toward an outside of the shock absorber.

A plastic spring, a pump core, a lotion pump and a press-type packaging container. The plastic spring includes at least one spring unit. Each spring unit includes a first support member, a second support member, and at least two torsion arms. The at least two torsion arms are arranged between the first support member and the second support member, and both ends of each of the torsion arms are respectively connected with the first support member and the second support member. Each of the torsion arms includes at least one vertical section, and an end of each vertical section is connected with the first support member or the second support member.

A seat member has a seat portion, a receiving surface of which comes into contact with a bearing surface of an end turn portion, a mounting shaft portion protruded from the receiving surface of the seat portion, and an enlarged diameter portion formed at the front end of the mounting shaft portion for guiding press-fitting, in a cross section along an axial direction of a coil spring, an outer diameter of the enlarged diameter portion is set larger than an inner diameter of the end turn portion and an axial length of the enlarged diameter portion is set so that at least a maximum diagonal length of the seat member is larger than an inter-element wire distance.

A liquid inertia vibration elimination (“LIVE”) system for a rotor system having n number of blades. The LIVE system includes a first tuned vibration reduction component configured to provide a maximum vibratory isolation at a frequency below 2*n/rev and a second tuned vibration reduction component configured to provide a maximum vibratory isolation at a frequency above 3*n/rev.

In a power transmission device, a dynamic damper is provided in a power transmission path having at least one damper disposed therein, and has an inertial rotating body that can rotate relative to a transmission rotating member forming part of the power transmission path, and a dynamic damper spring that can provide connection between the transmission rotating member and the inertial rotating body. A preset load is applied to the dynamic damper spring in a non-transmitting state of the power transmission path. The dynamic damper spring is supported on either one of the transmission rotating member and the inertial rotating body so as to apply the preset load to the dynamic damper spring in the non-transmitting state, and a gap is set in a rotational direction in the non-transmitting state between the dynamic damper spring and an other one of the transmission rotating member and the inertial rotating body.

Proposed is a rubber bush type vibration damping device for a vehicle, which solves the problem of vibration increase which may occur in the natural frequency of the vibration damping device by changing the shapes of an inner coupling part or an outer coupling part and by using difference in the lengths of rubber insulators due to the changing of the shapes thereof. The vibration damping device includes an inner coupling part, an outer coupling part, and a plurality of rubber insulators having have different natural frequency.

A damper device includes: an input element coupled to an engine via a clutch; an intermediate element; an output element coupled to an input shaft of a transmission; a first elastic body that is disposed between the input element and the intermediate element; and a second elastic body that is disposed between the intermediate element and the output element and that acts in series with the first elastic body. When a total moment of inertia of the output element and a rotation element that rotates integrally with the output element on the engine side with respect to the input shaft is J.sub.2, and a total moment of inertia of all rotation members included between the input shaft and a differential gear coupled to an output shaft of the transmission is J.sub.TM, 0.12≤J.sub.2/(J.sub.2+J.sub.TM)≤0.5 is satisfied.

The present invention is to provide a vehicle-mounted apparatus having a biasing structure using a coil spring capable of reducing a lateral force of a coil spring that is applied to a biasing target member. When N1, n1, N0, and n0 represent the number of effective turns when the relief valve spring 37 is set in a valve hole 34 of a spool 29 in a compressed state, a value of an integer of N1, the number of effective turns when a length of the relief valve spring 37 is a natural length, and a value of an integer of N0, respectively, the spring 37 satisfies an equation 1: 0≤N1−n1≤0.25 or an equation 2: 0.75≤N1−n1<1.

Flexible spring member and end closure assemblies include a flexible spring member-defining a spring chamber. An end closure body includes an outer peripheral surface portion and an elongated damping passage extending axially into end closure wall in a spiral arrangement about longitudinal axis. End closure body is positioned along an end of flexible spring member with flexible wall permanently attached along outer peripheral surface portion such that a substantially fluid-tight joint is formed between flexible spring member and end closure body. Gas spring and gas damper assemblies as well as methods of assembly are also included.

A spring element that includes one or more loop portions. Each loop portion provides vibration isolation characteristics for the spring element. One or more fastening portions of the spring element enable the fastening or connecting of the spring element to one or more structures. A ratio of a longitudinal measure of each loop portion to a transverse measure of the spring element is between 7.5 and 500. A pair of loop portions may be integrally joined together at a middle section to form a continuous loop. A pair of fastening portions may be integrally joined to opposing sides of the middle section, respectively. One of the fastening portions may be connected to a first structure and the other one of the fastening portions may be connected to a second structure.