Abstract: A swimming pool cleaning system 2 is provided which provides both water suction and compressed air to a pool cleaning device. A pump 20 draws water form a swimming pool P through the pool cleaning device, an attached vacuum hose 14 and a suction line 12. An air inlet port 10 enters the suction line 12 adjacent the pump 20. The pump 20 then compresses the air A and pumps the water to a higher pressure simultaneously. The pump 20 is followed by a main pool filter 40 in which the water is filtered and returned to the pool P and the compressed air A is separated. A compressed air outlet 50 draws the compressed air A out of the main pool filter 40 and delivers the compressed air A to the pool cleaning device along a compressed air supply line 58. The air inlet port 10 includes a hollow inner tube segment 60 partially surrounded by a resilient outer sleeve 70.

Abstract: A scope mount is provided for a rifle which allows multiple scopes to be simultaneously attached to the rifle. The scope mount includes a connector which is rigidly attachable to a rifle base affixed to a receiver of the rifle. The scope mount also includes an auxiliary base rigidly attached to the connector and spaced to a side of the connector. The auxiliary base has a contour similar to a contour of the rifle base. Hence, any scope which is attachable to the rifle base directly can be similarly attached to the auxiliary base. The connector of the scope mount has a length which is shorter than a length of the rifle base. The connector can be connected to the rifle base and leave remaining portions of the rifle base exposed for connection of a scope thereto. A second scope can then be connected to the auxiliary base of the scope mount without necessitating removal of the scope which is attached directly to the rifle base. Thus, two scopes or other objects can be connected to the rifle.

Abstract: A Modified Ericsson Turbocharged Reciprocating Engine (METRE), is provided which exhibits a high thermal efficiency for power and refrigeration applications. A Modified Ericsson cycle can include 2, 3, 4, or more stages (number of intercooling and heat/reheat cycles between stages). As stages are added, both cycle efficiency and power density (power/weight flow) increase, therefore, trade-offs between higher performance and number of stages (system complexity, cost, etc.) are necessary to optimize the engine. By combining a turbocompressor for the low pressures of the cycle and a multi-piston reciprocating engine for the high pressures of the cycle, a light weight, highly fuel-efficient, low-polluting, engine can be achieved. The METRE is highly suited for the power range of automobiles and trucks. This engine can use low technology (lower turbine temperatures, efficiencies, etc.) as well as high technology components (higher turbine temperatures, efficiency etc.

Abstract: This disclosure is the use of high efficiency turbomachinery designs to achieve high efficiency thermodynamic cycles. The high efficiency thermodynamic cycles are referred to as the Modified Ericsson cycles, an expansion of the regenerative Brayton cycle. A Modified Ericsson cycle can include 2,3,4, or more stages (number of intercooling and heat/reheat cycles between stages) that achieve higher efficiencies and power density (net output power/cycle weight flow rate) than those of regenerative and nonregenerative Brayton cycles. Also included is a high temperature tip-turbine driven compressor design for Brayton, Modified Ericsson and other power/refrigeration cycles.

Abstract: An air-breathing pulsed jet engine for aircraft propulsion which employs a piston compressor rather than much more expensive axial or centrifugal compressors and turbines employed by conventional turbojet engines. The engine is similar to the common two-cycle gasoline engine, except its cylinder head comprises a jet nozzle with an internal pressure-activated nozzle-blocking valve. A spring keeps this valve closed during the engine's compression stroke when the piston, connected to a crankshaft and flywheels by a connecting rod, is forced by the moment-of-inertia of the flywheels toward the cylinder head. When ignition and combustion of the compressed air and fuel occurs slightly before the piston reaches the top of its stroke, the much greater pressures within the engine's combustion chamber force the valve to pivot open. This allows a jet of combustion gases to be released through the jet nozzle into the atmosphere.