Abstract: The invention provides a pneumatic tire for mounting on a wheel hub, the tire having a plurality of ground engaging pads disposed around the periphery of the tire. Each pad is capable of at least a limited degree of rotational displacement about a radial axis relative to the tire, so that the tire may turn through the limited rotation relative to any pad which is in ground contact. A means is provided for returning each pad to its undisplaced position when the pad has moved out of contact with the ground.

Abstract: An apparatus for removing water from the ground comprises at least one ground-engaging drum including a hollow cylinder mounted for rotation about a substantially horizontal axis, and a plurality of recesses substantially parallel to the rotational axis of the cylinder formed in the outer surface of the cylinder around the periphery thereof. A non-porous sheet of resilient material covers the outer surface of the cylinder, and a plurality of slits are cut in the covering sheet over the recesses in the cylinder. The slits are normally closed but are capable of opening under the pressure of water built up in front of the drum, as the latter is moved across the ground, to permit such water to enter the recesses in the region of ground contact.

Abstract: A wheel comprises a hub 11 and a plurality of ground-engaging pads 16 disposed around and coupled to the periphery of the hub by radial studs 17. Each pad is capable of at least a limited degree of angular displacement about the axis of its stud 17 whereby the hub may turn through such angle relative to any pad currently in ground contact. A resilient stop 30 is associated with each pad to return each pad to its undisplaced position when the pad has moved out of contact with the ground. In an alternative embodiment a resilient member between the hub and the pad serves to both limit angular displacement and return the pad to its undisplaced position.

Abstract: A wheeled carriage comprises a frame member, two independently swivelling ground-engaging wheels mounted spaced apart below the frame member, and at least one pipe support member mounted below the frame member for pivotting about a substantially horizontal axis transverse a notional line joining the swivel axes of the wheels. The pipe support member is adapted to support a pipe between the wheels. The carriages are used to form a pipe train comprising a series of connected pipe sections supported by a plurality of wheeled carriages connected together in pairs by pivotal link bars bridging the frame members of connected pairs of carriages, the pipe sections being flexibly connected together between each connected pair of carriages.

Abstract: An apparatus for the removal of water from the ground includes a rotatable outer cylinder apertured around its circumference, and a non-rotating part cylindrical member concentric with, and immediately inside the cylinder. The part cylindrical member is open in the region of ground contact. A plurality of sweeper blades are mounted inside the outer cylinder for rotation relative thereto while the outer cylinder is rotating. The blades sweep ground water received through the apertures of the outer cylinder upwardly for trapping between the blades and the part cylindrical member. At a certain height the ground water is discharged into a non-rotating tank inside the outer cylinder.

Abstract: An apparatus for the removal of water from the ground comprises at least one ground-engaging drum including a hollow cylinder mounted for rotation about a horizontal axis, a plurality of apertures distributed around the circumference of the cylinder, and a layer of open cell resilient material covering the outer surface of the cylinder. Valves in the drum are arranged to close the apertures except under the inward pressure of water passing through the resilient layer when the latter is compressed, and a plurality of troughs are provided on the inner surface of the cylinder for carrying water which enters the apertures in the area of ground contact upwardly away from the ground by rotation of the cylinder. A non-rotating water tank (not shown) mounted within the cylinder collects the water discharged from the troughs when each reaches a certain height.