Wells – With below and above ground modification – Eduction pump or plunger in well
Reexamination Certificate
2006-05-02
2006-05-02
Bagnell, David (Department: 3672)
Wells
With below and above ground modification
Eduction pump or plunger in well
C166S242800, C166S236000, C166S370000
Reexamination Certificate
active
07036577
ABSTRACT:
A groundwater pumping apparatus includes an outer tube, an inner tube, a shield member, a vacuum unit and a pump unit. The outer tube is buried in ground, and has a water-passing portion at its lower part. The inner tube has a substantially same length as the outer tube, and is placed in the outer tube such that the inner tube is spaced from the outer tube. The inner tube has a groundwater inlet at its bottom end, which is provided at a position lower than a top end of the water-passing portion. The shield member shields top ends of the outer tube and the inner tube. The vacuum unit reduces a pressure in the inner tube. The pump unit pumps groundwater that comes in the inner tube through the groundwater inlet.
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Matsumura Shuichi
Minamijima Yoshiyuki
Takahashi Shigeyoshi
Yamaguchi Toru
Asahi Techno Corp.
Bagnell David
Nippon Kensetsu Kikai Shoji Co., Ltd.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Stephenson Daniel P
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