Rotary kinetic fluid motors or pumps – With lubricating – sealing – packing or bearing means having... – For shaft sealing – packing – lubricating or bearing means
Reexamination Certificate
2005-02-15
2005-02-15
Verdier, Christopher (Department: 3745)
Rotary kinetic fluid motors or pumps
With lubricating, sealing, packing or bearing means having...
For shaft sealing, packing, lubricating or bearing means
C415S174500, C415S230000, C417S423110, C417S424100, C277S347000
Reexamination Certificate
active
06854957
ABSTRACT:
A seal of a vertical pump with a front casing disposed on a main casing which has a motor disposed therein. A volute chamber is disposed inside the front casing to receive a centrifugal impeller. A suction inlet is disposed axially on the front casing opposite the motor. A water outlet is disposed thereon opposite the lateral side of the impeller to engage with a discharge pipe. The suction inlet and outlet are in communication with a volute chamber. The pump has a non-contact seal disposed on the impeller. The seal can jam when a liquid crystallizes. Therefore, if no heat is generated due to the friction of the seal, the pump operates better. Furthermore, it prevents a back impeller vane from stirring the air and ejecting the liquid with a lot of air bubbles when the pump operates. Therefore, it eliminates the air bubbles from causing problems during the manufacturing process of a printed circuit board.
REFERENCES:
patent: 2459036 (1949-01-01), Lipe et al.
patent: 2649050 (1953-08-01), Dibdin
patent: 4152092 (1979-05-01), Swearingen
patent: 4472109 (1984-09-01), Blum
patent: 4917572 (1990-04-01), Van Houten
patent: 860456 (1961-02-01), None
Assoma Inc.
Pro-Techtor Inter-National Services
Verdier Christopher
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