1
Frank R Shippey, Timothy C Vance, Fred E Martin: Automatic flushing system for membrane separation machines such as reverse osmosis machines. Raypak, Herzig & Walsh, November 16, 1976: US03992301 (156 worldwide citation)

An automatic flushing and cleaning system for membrane separation machines such as reverse osmosis machines having plural modules or membranes. Cleaning may be by way of reducing the pressure to allow the membrane to relax, by the injection of air or inert gas to provide turbulence, and/or by inject ...


2
Grimme Jr Henry L, Osborn Ray: Water purification and vending apparatus. Raypak, Herzig & Walsh Incorporated, December 24, 1974: US3856676 (74 worldwide citation)

Apparatus for purifying water taken from a well, municipal water system or other source including solids removal and then pressure filtration providing treated water and rejected water. A closed storage tank receiving treated water only, with controls for operation of the pressure filtration at inte ...


3
Block Leo: Stackless outdoor heater adapted for swimming pools. Raypak Company, November 30, 1971: US3623458 (24 worldwide citation)

The invention is a heating appliance of the stackless type particularly adapted for heating swimming pool water. Openings are provided at the upper part of the appliance for admitting atmospheric air for combustion and allowing it to mix with and dilute flue products before being discharged to keep ...


4
Block Leo, Ashton Larry J, Vodraska Kenneth F: System to prevent freezing of heating units such as boilers. Raypak, Herzig & Walsh, May 28, 1974: US3812872 (19 worldwide citation)

A control system to prevent freezing of heating units, such as boilers, particularly those which may be outdoors, such as on a rooftop. A drain valve is provided to automatically drain the water from the unit in the event of power failure which would prevent heating of the water, or in the event of ...


5
Leo Block, Larry J Ashton: Securement of heat exchanger surfaces to tubes and method of fabrication. Raypak, Albert M Herzig, Edward C Walsh, June 26, 1979: US04158908 (13 worldwide citation)

Securement of flat heat exchange surfaces, particularly fins to tubular conduits of a heat exchanger. The heat exchange material has longitudinal, partially circular recesses parallel to the length of a tube for engaging opposite sides of the tube. The radii of the recesses corresponds to the outer ...


6
Block Leo: Reverse osmosis cell with turbulator means. Raypak, October 30, 1973: US3768660 (13 worldwide citation)

A reverse osmosis cell of the type embodying an elongated, hollow, porous core having an osmotic membrane on the exterior thereof. The core with membrane is within a tubular shell, or tube section. The feed fluid is in the annulus between the core and tubular shell. The flow of feed fluid is a conti ...


7
Larry J Ashton, Leo Block: Securement of heat exchanger surfaces to tubes by lock seaming and method of fabrication. Raypak, Albert M Herzig, Edward C Walsh, July 10, 1979: US04160476 (12 worldwide citation)

Securement of flat heat exchange surfaces, particularly fins to tubular conduits of a heat exchanger. The heat exchange material is formed into upper and lower, or first and second pieces having longitudinal, partially circular recesses parallel to the length of a tube for engaging opposite sides of ...


8
Adrian V Cavestany: Gas-fired outdoor spa and hot tub heater. Raypak, Evanns & Walsh, July 14, 1987: US04679545 (11 worldwide citation)

A heat exchanger unit for use with spas or hot tubs. The unit is constructed to be installed in a side wall of a portable spa or hot tub. The unit has an exposed front plate or panel, and the unit is constructed so as to limit the temperature to which this panel can reach. The heater unit includes a ...


9
Block Leo, Leonard James E: Multiple-boiler temperature control system having boiler sequencing, reverse order firing, and individual boiler modulation with outdoor temperature reset. Raypak Company, April 27, 1971: US3576177 (11 worldwide citation)

The invention is a multiple-boiler system having N boilers with sequencing control. Each boiler has modulating control by way of control of a gas valve. The boilers are brought on in sequence, or fired in sequence in response to load requirements, each boiler being modulatingly controlled while on. ...


10
Whittel Jr Alfred: Hot water heating system for providing hot rinse water at uniform temperature. Raypak Company, April 20, 1971: US3575157 (10 worldwide citation)

The invention is in the field of hot water heating and supply systems constructed to be able to supply hot rinse water at a temperature of, for example, 180.degree. to 205.degree. F. for the duration of relatively short but rapid draws, while maintaining this temperature. An accumulator tank of limi ...