A composite wrap is provided for damping vibration in an elongated quill shaft having a cylindrical body. The composite wrap includes interior layering for disposition about a cylindrical body, exterior layering configured to define an exterior composite wrap shape and sequential cured-in-place, vibration damping, fibrous epoxy layers. The sequential cured-in-place, vibration damping, fibrous epoxy layers are radially interposed between the interior and exterior layering to dampen vibrations of and/or to adjust a resonance frequency of the cylindrical body.

A damper guard coupled to an external surface of an engine block includes a back cover defining an opening. The damper guard also includes a front cover adapted to couple to the back cover such that an enclosed space is defined between the front and back covers. The damper guard further includes a pressure balancing line coupled at a first portion of the back cover. The pressure balancing line is adapted to vent the enclosed space to an engine crankcase for maintaining the enclosed space at an engine crankcase pressure. The damper guard includes a drain line adapted to allow drainage of a damper oil present in the enclosed space.

A damper is provided for responding to relative movement of arms to which the damper is coupled. The damper includes a member, springs, a first housing and a second housing. The first housing includes a first body and first bellows affixed to the member and the first body by first joints to define a first interior. The second housing includes a second body and second bellows affixed to the member and the second body by second joints to define a second interior. The first and second interiors are configured to contain fluid charged therein and the member is configured to permit bi-directional flows of the fluid between the first and second interiors responsive to the relative movement of the arms and in opposition to an elasticity of the springs.

A damper guard coupled to an external surface of an engine block includes a back cover defining an opening. The damper guard also includes a front cover adapted to couple to the back cover such that an enclosed space is defined between the front and back covers. The damper guard further includes a pressure balancing line coupled at a first portion of the back cover. The pressure balancing line is adapted to vent the enclosed space to an engine crankcase for maintaining the enclosed space at an engine crankcase pressure. The damper guard includes a drain line adapted to allow drainage of a damper oil present in the enclosed space.

A mounting eye (21) is fastened to a rod by pushing, partially or over an entire periphery, an outer periphery of a joint portion of a mounting eye into an annular groove of the rod. Accordingly, an axial length of a fastening portion can be set shorter than that of a related-art structure (screw fastening), thereby being capable of securing a stroke of the rod of a shock absorber in which the mounting eye is fastened to the rod.

A spring assembly includes a coil spring having one or more helical coils between two longitudinally spaced ends, and an attachment site disposed at at least one of the longitudinally spaced ends. The attachment site includes a casing enclosing the at least one of the longitudinally spaced ends, the casing having a casing passage therethrough between a first side and a second side. The attachment site also includes a washer disposed on the first side and having a washer passage aligned with the casing passage, and a base disposed on the second side and having a base passage aligned with the casing passage.

An axially damping elastomer bearing suitable for a motor vehicle, with a crucible-formed receptacle (13) for surrounding receiving an elastomeric support spring (15). The crucible-formed receptacle (13) is manufactured through casting and can be demolded in a demolding direction (39) and has a peripheral wall (19) with at least one drainage opening (33), wherein the at least one drainage opening (33) has a clearance (43, 45, 65) extending in the demolding direction (39).

An apparatus which damps oscillation in a ski, the apparatus comprising an enclosure, a cavity encompassed by the enclosure, and an aggregate located in the cavity. The cavity has a dimension in a direction perpendicular to a gliding surface of the ski which is larger than a thickness of the ski in a location adjacent to the enclosure. The aggregate, in its tapped density, occupies substantially less volume than a volume of the cavity, thereby allowing significant travel of the aggregate in the cavity. Oscillation accelerates and decelerates the enclosure, resulting in accelerations and decelerations of the aggregate which cause it to acquire and lose kinetic energy. The aggregate's acquisition and loss of kinetic energy attenuates the oscillation.

The invention relates to a protective device for a shock absorber, in particular a commercial vehicle shock absorber, comprising a first base area and a second base area, wherein the first base area and the second base area are connected to one another in such a way that via a swivel axis they can be swiveled in relation to one another between an assembly state and an operating state, and wherein the first base area and the second base area in the operating state substantially form a hollow cylindrical shape.

A coil spring jig includes a spring support portion where one end of a coil spring is capable of being placed, a plurality of displacement regulating portions extending along an axis of the coil spring from the spring support portion with the coil spring supported by the spring support portion as a reference, capable of abutting against an outer peripheral surface of the coil spring, and regulating displacement of the coil spring in a radial direction of the coil spring, and a lid portion supported by the displacement regulating portions and capable of keeping the coil spring in a compressed state by sandwiching the coil spring together with the spring support portion.