Pumps – Buoyantly supported
Reexamination Certificate
2000-01-06
2001-11-06
Walberg, Teresa (Department: 3742)
Pumps
Buoyantly supported
C210S109000
Reexamination Certificate
active
06312228
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a recovery pump, and more particularly to a recovery pump for recovering floating oil and/or floating matter such as scum or the like, which float on a surface of liquid.
For the purpose of recovering floating oil and/or floating matter such as scum or the like, which float on a surface of liquid, a recovery apparatus has been conventionally practiced, which is so constructed that a recovery section provided with an inflow port for recovering floating oil and/or floating matter therethrough is floated on a surface of liquid by means of a float and the inflow port of the recovery section is connected to a pump arranged on a ship, land or the like through a hose.
Unfortunately, the conventional recovery apparatus requires an increased space for installation because the recovery section and pump are separated from each other and the recovery section and pump are connected to each other through the hose. In order to eliminate such a disadvantage, a recovery apparatus is proposed which is constructed as disclosed in Japanese Utility Model Publication No. 13603/1977. More particularly, in the proposed recovery apparatus, a pump is integrally supported on a float body formed with an inflow passage for guiding floating oil and/or floating matter therethrough to the pump. However, the recovery apparatus has a problem of requiring to increase a size of the float depending on a weight of the pump, resulting in the recovery apparatus being large-sized as a whole.
SUMMARY OF THE INVENTION
The present invention has been made in view of the foregoing disadvantage of the prior art.
Accordingly, it is an object of the present invention to provide a recovery pump for recovering floating oil and/or floating matter which pump is capable of being significantly down-sized.
It is another object of the present invention to provide a recovery pump which is capable of positively recovering floating oil and/or floating matter such as scum or the like, which float on a surface of liquid.
In accordance with the present invention, a recovery pump for recovering floating oil is provided. The recovery pump includes a pump casing formed in a lower section thereof with a suction passage which horizontally extends and has a suction opening. The pump casing is formed in the lower section thereof with a discharge passage in such a manner as to be positioned below the suction passage and horizontally extend. Also, the pump casing is formed therein with a through-hole which permits the suction passage and discharge passage to communicate with each other therethrough. The recovery pump also includes an impeller rotatably arranged within the discharge passage right below the through-hole, a drive motor arranged on an upper section of the pump casing for rotating the impeller, and a recovery section arranged at the suction opening for recovering the floating oil and/or floating matter such as scum or the like therethrough.
In a preferred embodiment of the present invention, the impeller is indirectly rotated following rotation of the drive motor.
In a preferred embodiment of the present invention, the recovery section is constituted by a pipe body vertically mounted to the suction opening, a slide pipe provided with an inflow port, and a float. The slide pipe is slidably mounted on the pipe body and arranged so as to float in liquid while being supported by the float.
In a preferred embodiment of the present invention, the inflow port is formed on one side of a central portion thereof with a constriction. The constriction is formed with a V-shaped groove in a manner to outwardly face. The V-shaped groove includes a bottom formed so as to be upwardly inclined toward the inflow port.
In a preferred embodiment of the present invention, the pump further includes a scraping-up means positioned to face the inflow port for scraping up the floating oil and/or floating matter to make them flow into the recovery section and an additional motor for driving said scraping-up means.
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Hashimoto Masami
Mori Yoji
Fastovsky Leonid M
Steinberg & Raskin, P.C.
Walberg Teresa
World Chemical Co., LTD.
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