Abstract: A rotary sprinkler system for both above-the ground and pop-up rotary sprinkler systems that controls the rate of nozzle rotation is disclosed. To maintain a relatively constant and controlled nozzle rotation, one or more chamfered spokes are included on the turbine of the sprinkler system. This turbine configuration together with a stator assembly that regulates fluid flow to the turbine control nozzle rotation despite variations in fluid flow. In particular, the chamfered spokes counteract the spin of the turbine in direct relation to the amount of water that bypasses the driving blades of the turbine.

Abstract: The portable tank defines a chamber within which is disposed a liner having a sealing interface with a tank discharge assembly. The features of the sealing interface of the liner with the discharge assembly and this discharge assembly itself virtually eliminate any risk that contents of the tank will seep or flow into the space outside of the liner and between the liner and the inner walls of the tank. The method of installing and using the liner system are also disclosed.

Abstract: A catheter has a pressure sensitive bladder at a distal end and a pressure transducer at a proximal end with the proximal end attached to a mammalian body and the bladder inserted within the mammalian body. The bladder partially filled with a gas responds to pressure changes within the body and the pressure transducer senses the changes via gaseous communication with the bladder. In one embodiment, the bladder is inserted in a human brain with the transducer mounted on a bolt affixed to the skull. Initial dissection of the brain tissue is effected by over-inflation of the bladder by a manual piston pump or a blunt ended slender rod. The transducer may be mounted on a bolt inserted within a hole drilled in the skull. An antimicrobial agent may be dispersed from openings in a seal between the bolt and the skull, from a porous seal, or from a ribbed or threaded outer surface of the bolt.