Abstract: A vehicle (2) is provided for use for movement across a surface (18). The vehicle (2) includes a body (4), steering means to allow the selective steering of the vehicle (2) via first and second sets of a plurality of drive wheels (11, 12), a first set (11) mounted on one side (14) of the body (4) and a second set (12) mounted on the opposing side (16) of the body (4) so as to contact with the surface (18). At least one wheel in each set (11; 12) is provided so as to be in greater traction and/or grip with the said surface (18) than the other wheels (11; 12) in the set (12) to thereby achieve an improved steering system which requires low power consumption to achieve the steering and thereby reduce the power demand on the batteries of the vehicle (2) which are provided to drive the vehicle (2) and prolong the time of usage of the vehicle (2) between battery charging being required.

Abstract: A vehicle (2) is provided for use for movement across a surface (18). The vehicle (2) includes a body (4), steering means to allow the selective steering of the vehicle (2) via first and second sets of a plurality of drive wheels (11, 12), a first set (11) mounted on one side (14) of the body (4) and a second set (12) mounted on the opposing side (16) of the body (4) so as to contact with the surface (18). At least one wheel in each set (11; 12) is provided so as to be in greater traction and/or grip with the said surface (18) than the other wheels (11; 12) in the set (12) to thereby achieve an improved steering system which requires low power consumption to achieve the steering and thereby reduce the power demand on the batteries of the vehicle (2) which are provided to drive the vehicle (2) and prolong the time of usage of the vehicle (2) between battery charging being required.

Abstract: The invention relates to a craft in the form of a body to be sat or laid upon by a user and provided with power for use in a body of water. There is also provided a method for the use of the craft in game play and the use of the same in a manner which allows the power source for the drive to be managed. A system for transport, charging and/or communication with the craft from onshore is also provided, along with a system to allow the use of the craft within a specified area on the body of water to be maintained and controlled.

Abstract: The invention relates to a craft in the form of a body to be sat or laid upon by a user and provided with power for use in a body of water. There is also provided a method for the use of the craft in game play and the use of the same in a manner which allows the power source for the drive to be managed. A system for transport, charging and/or communication with the craft from onshore is also provided, along with a system to allow the use of the craft within a specified area on the body of water to be maintained and controlled.

Abstract: The invention relates to a valve assembly which includes at least one, but typically two, balls located along a passage and which balls can be moved between open and closed positions to selectively control the passage of fluid along the passage. The valve assembly includes at at least one end thereof a retaining assembly which allows the effective sealing against one surface of a ball and retention of the same in position. A sealing assembly is also provided when two balls are provided, intermediate the same, which allows effective sealing to be achieved and at least one of the two trunnions which allows each of the balls to be mounted within the valve body is located only internally of the valve body. The components of the valve assembly which are located within the same can in one embodiment all be inserted into and located within the valve body from one common end.

Abstract: The invention relates to a valve assembly that can be provided of a length to meet conventional fitting dimensions and requirements. The valve assembly includes a valve body housing, at least first and second valve balls. Between the first and second valve balls are provided first and second valve seats. The valve seats are biased towards their respective valve balls. The valve seats, that lie between the valve balls, are typically provided as part of a common valve seat assembly that includes springs and the like.

Abstract: A valve assembly, including a valve body, at least one passage along which fluid can be selectively allowed to pass, and at least one ball located in the passage so as to be movable between a first position in which a channel in the ball forms part of the passage and a second position in which the ball prevents fluid passing and wherein at least one end of the body and depending inwardly towards one side of the at last one ball there is provided is retention assembly.

Abstract: The invention relates to a valve assembly which includes at least one, but typically two, balls located along a passage and which balls can be moved between open and closed positions to selectively control the passage of fluid along the passage. The valve assembly includes at, at least one end thereof, a retaining assembly which allows the effective sealing against one surface of a ball and retention of the ball in position. A sealing assembly is also provided when two balls are provided, which allows effective sealing to be achieved and at least one of the two trunnions which allows each of the balls to be mounted within the valve body is located only internally of the valve body. The components of the valve assembly can in one embodiment all be inserted into and located within the valve body from one common end.

Abstract: The invention relates to a valve assembly which includes at least one, but typically two, balls (12,14) located along a passage and which balls can be moved between open and closed positions to selectively control the passage of fluid along the passage. The valve assembly includes at at least one end thereof a retaining assembly (32,34) which allows the effective sealing against one surface of a ball and retention of the same in position. A sealing assembly is also provided when two balls are provided, intermediate the same, which allows effective sealing to be achieved and at least one of the two trunnions which allows each of the balls to be mounted within the valve body is located only internally of the valve body. The components of the valve assembly which are located within the same can in one embodiment all be inserted into and located within the valve body from one common end.

Abstract: The invention relates to a valve assembly which includes at least one, but typically two, balls located along a passage and which balls can be moved between open and closed positions to selectively control the passage of fluid along the passage. The valve assembly includes at at least one end thereof a retaining assembly which allows the effective sealing against one surface of a ball and retention of the same in position. A sealing assembly is also provided when two balls are provided, intermediate the same, which allows effective sealing to be achieved and at least one of the two trunnions which allows each of the balls to be mounted within the valve body is located only internally of the valve body. The components of the valve assembly which are located within the same can in one embodiment all be inserted into and located within the valve body from one common end.

Abstract: The invention relates to a valve assembly which includes at least one, but typically two, balls located along a passage and which balls can be moved between open and closed positions to selectively control the passage of fluid along the passage. The valve assembly includes at at least one end thereof a retaining assembly which allows the effective sealing against one surface of a ball and retention of the same in position. A sealing assembly is also provided when two balls are provided, intermediate the same, which allows effective sealing to be achieved and at least one of the two trunnions which allows each of the balls to be mounted within the valve body is located only internally of the valve body. The components of the valve assembly which are located within the same can in one embodiment all be inserted into and located within the valve body from one common end.

Abstract: The invention relates to a valve assembly that can be provided of a length to meet conventional fitting dimensions and requirements. The valve assembly includes a valve body housing, at least first and second valve balls. Between the first and second valve balls are provided first and second valve seats. The valve seats are biased towards their respective valve balls by common biasing means. The valve seats, that lie between the valve balls, are typically provided as part of a common valve seat assembly that includes the biasing means.

Abstract: The invention relates to a valve assembly (1), typically of the double block and bleed type. Conventionally these assemblies include a flange formation at each end to allow the same to be joined to adjacent pipeline end flanges. However this causes problems as there are limitations on the acceptable length of these valve types. The present invention provides ports (34) for the reception of location means (32) in the valve body (2) without the need for the flange formations and therefor allows the valve body (2) to extend along the whole length of the valve assembly (1), increasing the space available for the valve components within the valve assembly (1).