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 method and apparatus for coating transportation components such as a bridge deck with a coating. The coating includes a sealant and rubber mixed with a resin and a foaming agent. The apparatus includes a hopper for the rubber, a impingement gun for the resin and a gun assembly that combines the rubber and resin together at a combined nozzle for spraying.

Structural assemblies for constructing bridges and other structures. A structural assembly may comprise an elongated member defining an internal space. The structural assembly may also comprise a plurality of framing members connected to the elongated member at a plurality of pin connection nodes, each pin connection node comprising a pin interconnecting the elongated member, a first one of the framing members, and a second one of the framing members, the pin having a first longitudinal end and a second longitudinal end, at least one of the first longitudinal end and the second longitudinal end of the pin being located in the internal space of the elongated member.

Structural assemblies for constructing bridges and other structures. A structural assembly may comprise an elongated member defining an internal space. The structural assembly may also comprise a plurality of framing members connected to the elongated member at a plurality of pin connection nodes, each pin connection node comprising a pin interconnecting the elongated member, a first one of the framing members, and a second one of the framing members, the pin having a first longitudinal end and a second longitudinal end, at least one of the first longitudinal end and the second longitudinal end of the pin being located in the internal space of the elongated member.

This invention is an improved side section for a marine gangplank/gangway structure. This side section has a unique visually appealing design and provides gangplanks with resistance to twisting and increased live load capacity. The side sections of this invention can be used to reduce the weight and cost of gangplanks while improving durability. This marine structure comprises (1) a horizontal base section, (2) a vertical base, (3) a horizontal spacer, (4) a sigma spring section which extends upwardly from the inside end of the horizontal spacer in a circumferential manner, (5) a lower deck support, wherein the lower deck support extends horizontally from the top end of the sigma spring section, and wherein the lower deck support includes a fulcrum which is situated on the top of the lower deck support, (6) a vertical deck support, and (7) an upper deck.

A raising assembly for use with a gangway connected for rotation between a raised stowed position and a lowered deployed position. The raising assembly comprises at least one fluid actuated cylinder connected to the gangway. A raising actuator is operative to cause operation of the cylinder in a manner that rotates the gangway toward the stowed position while the raising actuator is continuously activated by an operator. A lowering actuator is operative to cause operation of the cylinder in a manner that rotates the gangway toward the deployed position due to gravitational forces while the lowering actuator is continuously activated by the operator. The raising assembly is configured to maintain the gangway at a current position between the stowed position and the deployed position if the operator does one of ceasing to activate the raising actuator while raising the gangway or ceasing to activate the lowering actuator while lowering the gangway.

A raising assembly for use with a gangway connected for rotation between a raised stowed position and a lowered deployed position. The raising assembly comprises at least one fluid actuated cylinder connected to the gangway. A raising actuator is operative to cause operation of the cylinder in a manner that rotates the gangway toward the stowed position while the raising actuator is continuously activated by an operator. A lowering actuator is operative to cause operation of the cylinder in a manner that rotates the gangway toward the deployed position due to gravitational forces while the lowering actuator is continuously activated by the operator. The raising assembly is configured to maintain the gangway at a current position between the stowed position and the deployed position if the operator does one of ceasing to activate the raising actuator while raising the gangway or ceasing to activate the lowering actuator while lowering the gangway.

Structures, systems, and methods for vehicle-to-road technology for one or more of alignment, stopping, slowing, and slipping by electromagnetic forces are disclosed, including a road system, comprising a road having a longitudinal axis and containing ferrous material positioned in a pattern aligned with the longitudinal axis, the pattern configured to, when the ferrous material is magnetized, generate a magnetic force such that a vehicle on the road is guided by the magnetic force. In some implementations, the pattern may be configured to, when the ferrous material is magnetized, generate the magnetic force such that the vehicle on the road is guided by the magnetic force in a predetermined direction. The ferrous material may be configured to change between a magnetized state and an unmagnetized state based on application of an electrical current to the ferrous material.

The present invention discloses an ultra-low frequency (ULF) tuned liquid mass damper, and relates to the technical field of bridge vibration control. The tuned damper includes a damping box which is provided with a spring set secured at one end to the damping box, the other end connected with a mass block. The damping box is filled with damping liquid, and the mass block is completely immersed or partially immersed in the damping liquid. The damping ratio of the ULF tuned liquid mass damper ranges from 3% to 35%, and the inherent frequency 0.05 to 0.5 Hz. The ULF tuned liquid mass damper, according to the present invention, can fully utilize the additional mass of the damping liquid, and with the buoyancy effect of the liquid, maintain the frequency of structural vibration below 0.5 Hz while significantly reduce the spring static elongation, as well as the damper spring consumption and the installation space to meet the limitations on the installation space for dampers under actual construction circumstances.

The present invention discloses an ultra-low frequency (ULF) tuned liquid mass damper, and relates to the technical field of bridge vibration control. The tuned damper includes a damping box which is provided with a spring set secured at one end to the damping box, the other end connected with a mass block. The damping box is filled with damping liquid, and the mass block is completely immersed or partially immersed in the damping liquid. The damping ratio of the ULF tuned liquid mass damper ranges from 3% to 35%, and the inherent frequency 0.05 to 0.5 Hz. The ULF tuned liquid mass damper, according to the present invention, can fully utilize the additional mass of the damping liquid, and with the buoyancy effect of the liquid, maintain the frequency of structural vibration below 0.5 Hz while significantly reduce the spring static elongation, as well as the damper spring consumption and the installation space to meet the limitations on the installation space for dampers under actual construction circumstances.