A seal assembly for sealing a shaft bearing includes a seal housing, first and second seal rings retained by the seal housing, an annular chamber formed between the first and second seal rings and a connecting channel configured to place the annular chamber in fluid communication with a bearing-housing-side oil space. When the seal assembly is installed on a shaft, the connecting channel is configured to permit a fill-level equalization between the oil space and the annular chamber when the oil space is filled to a first possible fill level (N.sub.1) and to prevent the fill-level equalization between oil space and annular chamber when the oil space is filled to a second possible fill level (N.sub.2).

A regulating device is for use in a drill string between a drilling machine and a drill bit. The regulating device has a tubular female portion which at least partly encloses a tubular male portion; a helical coupling between the female portion and the male portion to allow a telescoping movement of the regulating device in both directions between a fully extended position and a fully retracted position, the movement of the regulating device occurring when there is a difference in rotational speed between the female portion and the male portion; a first biasing device which is arranged to exert a driving force to drive the regulating device towards its extended position; and a second biasing device.

A regulating device is for use in a drill string between a drilling machine and a drill bit. The regulating device has a tubular female portion which at least partly encloses a tubular male portion; a helical coupling between the female portion and the male portion to allow a telescoping movement of the regulating device in both directions between a fully extended position and a fully retracted position, the movement of the regulating device occurring when there is a difference in rotational speed between the female portion and the male portion; a first biasing device which is arranged to exert a driving force to drive the regulating device towards its extended position; and a second biasing device.

The present invention relates to a multipurpose viscous damper (100), comprising: an outer cylinder (101); a core rod (102) positioned in the outer cylinder (101); a core piston (103) positioned in the middle and surrounded the core rod (102); a plurality of bypass pipes (104) extending along the outer cylinder (101), each bypass pipe (104) being connected to the outer cylinder (101) adjacent to the two ends of the outer cylinder (101); an orifice controller (105) located on the bypass pipes (104) for providing initial adjustable damping during low to moderate vibration; and characterized by a pair of inner cylinders (106) positioned inside the two ends of the core rod (102); an inner piston (107) positioned in each inner cylinder (106); a fixed sealing (108) located at the two end of each of the inner cylinders (106); and an orifice (109) located at the two ends of the inner cylinder (106) for allowing fluid flowing from the inner cylinder (106) to the outer cylinder (101) during movement of inner piston (107).

A vehicle reinforcing member includes first and second pistons movable in an axial direction in a cylinder. An inside of the cylinder is sectioned into a gas chamber and a main liquid chamber by the first piston, and the main liquid chamber is sectioned into a first sub-liquid chamber and a second sub-liquid chamber by the second piston. Gas is sealed in the gas chamber, and liquid is sealed in the first and second sub-liquid chambers. A piston rod is coupled to the second piston. The cylinder and the piston rod are respectively coupled to two locations of a vehicle body. A communication path connects the first sub-liquid chamber to the second sub-liquid chamber. A moving amount of the liquid in the communication path is adjusted by an adjuster such that a moving load through the second piston is adjusted.

A vehicle reinforcing member includes first and second pistons movable in an axial direction in a cylinder. An inside of the cylinder is sectioned into a gas chamber and a main liquid chamber by the first piston, and the main liquid chamber is sectioned into a first sub-liquid chamber and a second sub-liquid chamber by the second piston. Gas is sealed in the gas chamber, and liquid is sealed in the first and second sub-liquid chambers. A piston rod is coupled to the second piston. The cylinder and the piston rod are respectively coupled to two locations of a vehicle body. A communication path connects the first sub-liquid chamber to the second sub-liquid chamber. A moving amount of the liquid in the communication path is adjusted by an adjuster such that a moving load through the second piston is adjusted.

A damper of the present invention includes: a damping portion that exerts a damping force by using a granular material at a time of extension and contraction; and an elastic portion that exerts an elastic force at the time of extension and contraction, wherein the damping portion is coupled to the elastic portion such that the damping force and the elastic force are exerted in parallel.

A shock isolation system includes at least one isolator configured to be removably secured to an exterior of a container and at least one foot in communication with the at least one isolator and configured to contact a support surface. The isolator has a first end proximate the support surface and an opposing second end distal from the support surface, and is configured to transition between a first, contracted position and a second, expanded position. In a stowed configuration of the system, the isolator is in the contracted position and a bottom end of the container is spaced apart from the foot at a first distance. In a deployed configuration of the system, the isolator is in the expanded position and a bottom end of the container is spaced apart from the foot at a second distance which is greater than the first distance.

An actuator includes a piston, a relief valve in fluid communication with the piston, and an input shaft for moving fluid in a chamber near the piston. The relief valve determines an amount of force needed to move the piston to compress a fluid. The actuator also includes at least one check valve which allows the input shaft to move back to an equilibrium position with a much lower force than a force needed to compress the fluid. The actuator is a passive device that can be used to prevent motion or isolate a base. The actuator is also incorporated in tuned mass damping systems.

An actuator includes a piston, a relief valve in fluid communication with the piston, and an input shaft for moving fluid in a chamber near the piston. The relief valve determines an amount of force needed to move the piston to compress a fluid. The actuator also includes at least one check valve which allows the input shaft to move back to an equilibrium position with a much lower force than a force needed to compress the fluid. The actuator is a passive device that can be used to prevent motion or isolate a base. The actuator is also incorporated in tuned mass damping systems.