Abstract: A device for aiding a technician to locate a vein for inserting a hyperdermic needle therein in which, in one embodiment, the technician dons a headpiece supporting an infrared light source illuminating an appropriate area of the flesh so that a view is generated showing the location of a subcutaneous vein. The headpiece also supports an infrared sensitive video camera and monitor screen in front of one eye and an opaque shield over the other eye. The lines of sight of the one eye viewing the screen is coincident with the line of sight of the camera and both lines of sight are directed toward the vein of the patient. The tip of the needle is moved into the line of sight then moved along the line of sight to the vein. In another embodiment, two cameras and screens are provided for viewing by both eyes and each camera and monitor can be positioned with line of sight coincident with the line of sight of the respective eye.

Abstract: An unpatterned (grooveless) porous tire tread and a pneumatic tire incorporating the porous tread, together with methods of manufacturing the tire tread as a separate item and as an integral part of the tire are described. The tire tread has numerous randomly orientated and randomly distributed interconnected passages extending from the surface substantially throughout the tread. These passages provide water drainage paths preventing build-up of water between the tire tread and a wet road.The tire tread is preferably manufactured by bonding particulated elastomeric material with a binder mixture that forms a polymer upon curing. Whether formed separately or integrally with a tire, the tread mould is unpatterned.

Abstract: An unpatterned (grooveless) porous tire tread and a pneumatic tire incorporating the porous tread, together with methods of manufacturing the tire tread as a separate item and as an integral part of the tire are described. The tire tread has numerous randomly orientated and randomly distributed interconnected passages extending from the surface substantially throughout the tread. These passages provide water drainage paths preventing build-up of water between the tire tread and a wet road.The tire tread is preferably manufactured by bonding particulated elastomeric material with a binder mixture that forms a polymer upon curing. Whether formed separately or integrally with a tire, the tread mould is unpatterned.