1
Spiros G Raftis: Tide gate valve. Red Valve Company, Kirschstein Kirschstein Ottinger & Israel, January 8, 1985: US04492253 (39 worldwide citation)

A tide gate check valve in which at least three converging sides are provided at a tapered region of a flexible sleeve, so that on reverse back pressure build-up of fluid, reverse fluid flow is prevented, while the valve sleeve does not invert or collapse. The present configuration features embedded ...


2
Spiros G Raftis: Fine bubble diffuser. Red Valve Company, Webb Ziesenheim Logsdon Orkin & Hanson P C, April 9, 2002: US06367783 (30 worldwide citation)

A diffuser includes a substantially rigid base member having a first side and a second side, and an inlet conduit defining a central bore depending from the second side of the base member. A resilient dome member having a plurality of perforations is sealed to a peripheral edge of the first side of ...


3
Spiros G Raftis, George W Merritt: Inversion-resistant, readily-openable tide gate valve. Red Valve Co, Kirschstein Kirschstein Ottinger & Israel, August 26, 1986: US04607663 (28 worldwide citation)

A tide gate valve has staggered pads embedded therein to provide sufficient strength to resist sagging and inversion, and to provide sufficient flexibility to promote an easy opening of the valve.


4
Spiros G Raftis, Lawrence L Schneider: Pinch valve. Red Valve Company, Kirschstein Kirschstein Ottinger & Cobrin, May 19, 1981: US04268005 (24 worldwide citation)

An improved pinch valve construction which curtails and prevents end leakage where the valve is joined between two sections of duct or conduit; the valve is especially adapted for usage in large-sized piping such as ducts or conduits having diameters from 8 to 12 feet which carry bulk fluids such as ...


5
Spiros G Raftis, James A Campbell: Pinch valve. Red Valve Company, Kirschstein Kirschstein Ottinger & Cobrin, October 30, 1979: US04172580 (23 worldwide citation)

An improved pinch valve construction comprises a pair of pinch bars spaced apart of each other, and a valve sleeve intermediate the pinch bars and having wall portions bounding a flow-through passage. A flow-control device moves the pinch bars towards and away from each other and is operative for ur ...


6
Spiros G Raftis, Michael J Duer: Reinforced tide gate valve. Red Valve Co, Webb Ziesenheim Lodgsdon Orkin & Hanson P C, July 1, 2003: US06585005 (22 worldwide citation)

A support mechanism for a tide gate valve having an internal cavity, wherein the support mechanism includes a support body receivable in the tide gate valve cavity to help prevent the tide gate valve from collapsing in on itself when subjected to backflow pressure. The support mechanism is positione ...


7
Spiros G Raftis: Flip check valve. Red Valve Company, Webb Ziesenheim Logsdon Orkin & Hanson P C, July 2, 2002: US06412514 (21 worldwide citation)

A check valve for placement in a fluid conduit, includes a separator element with at least one opening; the opening allows fluid flow through the separator element. A pliant sealing member is attached to a downstream side of the separator element, covering the opening. During forward flow, this plia ...


8
Spiros G Raftis, George Merritt: Deformable sleeve for a pinch valve. Red Valve Co, Kirschstein Kirschstein Ottinger & Israel, June 18, 1985: US04523738 (18 worldwide citation)

A deformable sleeve for a pinch valve includes an inner tubular body of elastically deformable material which is provided with flanges at its axial ends, and a mesh element having a tubular portion which surrounds the tubular body between the flanges and prevents the same from bulging out under the ...


9
Spiros G Raftis, George W Merritt: Inversion-resistant tide gate valve. Red Valve Co, Kirschstein Kirschstein Ottinger & Israel, April 29, 1986: US04585031 (18 worldwide citation)

An inversion-resistant tide gate valve includes a multiple-ply sleeve, and a rigid support member embedded therein to prevent the sleeve from sagging and to impart strength to the sleeve to prevent inversion.


10
Spiros G Raftis: Pinch valve sleeve. Red Valve Co, Kirschstein Kirschstein Ottinger & Cobrin, February 8, 1983: US04372528 (17 worldwide citation)

A pinch valve sleeve for reducing the pressure of fluid flowing therethrough with or without actuation of the valve's pinching mechanism. The valve sleeve features an elongated hollow flexible resilient elastomeric sleeve body having an inner surface circumferentially bounding a flow-through passage ...