Pumps – Motor driven – Electric or magnetic motor
Patent
1987-07-21
1989-03-28
Freeh, William L.
Pumps
Motor driven
Electric or magnetic motor
417566, F04B 3504, F04B 2102
Patent
active
048159484
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a vibratory pump applicable to pump liquids.
A vibratory pump is known, which includes a housing of synthetic material and formed of a lower part and an upper part linked to each other by means of a connection which is formed in the lower part, an axial oscillating member and a static electric bobbin covered with resin and acting on a movable electric bobbin, which is placed in the axial oscillating member. The middle region of the oscillating member is supported and slides in a bearing and has a flexible membrane, which is disposed near the periphery of the housing in which the axial oscillating member is positioned. The latter supports a cupped glass element which is in cooperation with the flexible membrane. A part of the housing defines a variable volume chamber which communicates with the exterior through an admission valve and with an outer tube. The valve is constituted by a central chamber, which communicates with the variable volume chamber, through a movement of the cupped glass element positioned in the extremity of the axial member, and with the exterior through the opening. A second cupped glass is positioned on the wall of the valve.
In the conventional structure of the pump, the fixed electric bobbin is placed in the interior of the housing and covered with resin; under these conditions the bobbin warms up to the level which is above optimal level.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved vibratory pump.
This and other objects of the invention are attained by a pump in which the static part of the bobbin is positioned in a water refrigeration chamber which ensures the maintenance of the temperature of the bobbin within the acceptable limits.
In the conventional pump of the foregoing type the adjacent extremities of the housing are linked to each other by the connection of external flanges to each other. This solution requires, however, an enormous number of screws to be tightened and untightened each time it is necessary to open or close the pump in the maintenance work and the like; such operation is considered to be annoying and should be eliminated.
Furthermore, the main membrane in the conventional pump is formed by an extension that projects from the lower part of the water chamber to a connection region between the upper and lower parts of the housing, where a flange is coupled to a profiled tooth of the upper part and a flange of the bearing of the central oscillating member, which is interconnected between the flanges of the parts of the housing.
It is another object of the invention to substantially simplify maintenance operations for the vibratory pump.
These and other objects of the invention are attained by a vibratory pump, comprising a housing being substantially cylindrical, said housing including an upper part and a lower part connected to each other; connection means for connecting said lower and upper part to each other; a static electric bobbin covered with resin; a movable electric bobbin on which said static electric bobbin acts; an axial oscillating member supporting said movable bobbin; a bearing supporting said oscillating member; a main membrane supported on said oscillating member and having a periphery set close to an internal face of the housing and in cooperation with the housing defining a variable volume chamber, said lower part of the housing having a cooling chamber filled with water and accomodating said static electric bobbin; an admission central valve connected to said chamber and also to means which provides the cooling chamber with water; a stainless steel membrane having a periphery set in an internal face of said lower part of the housing and positioned between the static electric bobbin and the movable electric bobbin, said lower part having openings which are in communication with the said cooling chamber and with an exterior of the pump, said connection means including a flange region formed in the lower part of the housing and a flange formed
REFERENCES:
patent: 2634684 (1953-04-01), Aluarez et al.
patent: 2732806 (1956-01-01), Aluarez et al.
patent: 4568250 (1986-02-01), Falk
Freeh William L.
Striker Michael J.
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