1
Masayuki Hosono, Kenji Waragai, Hirozo Uejo, Mitsuru Tokumoto: Double-walled tube assembly. SMS Corporation, Ube, Burns Doane Swecker & Mathis, March 6, 1990: US04906496 (60 worldwide citation)

A double-walled tube assembly has an elongate inner tube of thermoplastic resin, and an elongate extruded outer tube of thermoplastic resin including a plurality of ribs having a constant height longitudinally of the outer tube and extending over the entire length of the outer tube, the ribs project ...


2
Kenji Waragai, Tsuneo Ishigaki: Gate valve. SMC Kabushiki Kaisha, Paul A Guss, October 9, 2001: US06299133 (47 worldwide citation)

A gate valve comprises a valve rod for making displacement in accordance with a driving action of a cylinder mechanism; a guide shaft for guiding the valve rod; a valve disk for opening/closing a passage in accordance with a displacement action of the valve rod; a rack connected to the valve rod, fo ...


3
Tsuneo Ishigaki, Kenji Waragai, Ikuo Kanzaka: Gate valve. SMC Kabushiki Kaisha, Paul A Guss, May 21, 2002: US06390449 (19 worldwide citation)

A gate valve is disclosed comprising an elevatable lever member connected to a piston rod, a displacement member for making up and down movements integrally with the lever member and being tiltably disposed about supporting rollers acting as a pivot point or fulcrum at an end position of displacemen ...


4
Tsuneo Ishigaki, Seiichi Furutate, Kenji Waragai: Gate valve. SMC Corporation, Oblon Spivak McClelland Maier & Neustadt P C, September 16, 2003: US06619618 (4 worldwide citation)

In a gate valve having a rectangular gate, generation of flection at opposite end portions due to bending moment applied to the gate is suppressed easily. For this purpose, in the gate valve in which a central portion of a longer side of the rectangular gate is mounted to a tip end of a shaft operat ...


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Tsuneo Ishigaki, Kenji Waragai: High-vacuum valve. SMC Corporation, Baker Botts L, August 1, 2000: US06095180 (3 worldwide citation)

A high-vacuum valve arranged to prevent conduction of heat from a valve element to a low-temperature part through a valve shaft. After the valve element has been moved to a position facing opposite to a valve seat by rectilinear motion of the valve shaft, the valve element is pressed against the val ...


7
Tsuneo Ishigaki, Keiichi Shibuya, Mamoru Fukuda, Kenji Waragai: High vacuum valve. SMC Kabushiki Kaisha, Paul A Guss, August 13, 2002: US06433308 (2 worldwide citation)

A high vacuum valve prevents the transfer of heat from a valve plug of a valve via a valve shaft to a low temperature portion. The high vacuum valve is constructed such that the valve plug arrives at a position opposed to a valve seat in accordance with rectilinear motion of the valve shaft and then ...


8
Kenji Waragai, Tsuneo Ishigaki: Gate valve. Paul A Guss, June 21, 2001: US20010004106-A1

A gate valve comprises a valve rod for making displacement in accordance with a driving action of a cylinder mechanism; a guide shaft for guiding the valve rod; a valve disk for opening/closing a passage in accordance with a displacement action of the valve rod; a rack connected to the valve rod, fo ...


9
Tsuneo Ishigaki, Seiichi Furutate, Kenji Waragai: Gate valve. SMC Corporation, Oblon Spivak Mcclelland Maier & Neustadt PC, March 7, 2002: US20020027214-A1

In a gate valve having a rectangular gate, generation of flection at opposite end portions due to bending moment applied to the gate is suppressed easily. For this purpose, in the gate valve in which a central portion of a longer side of the rectangular gate 5 is mounted to a tip end of a shaft 6 op ...