Abstract: A rotary pump for liquid comprising a housing, a shaft carrying a motor rotor, a motor stator fixed in the housing and surrounding the rotary to rotate the rotor and shaft about an axis, where the shaft is mounted in the housing by axially spaced conical bearings each of which includes a first element fixed on the shaft with a first conical bearing surface concentric with the axis and a second journal element carried by the housing with a second conical bearing surface concentric with the axis and slidably engaging the first bearing surface. A biasing element forces the second elements or journal toward each other in an axial direction to compensate for wear between the friction surfaces.
Type:
Grant
Filed:
March 12, 2002
Date of Patent:
September 30, 2003
Assignee:
Buffalo Pumps, Inc.
Inventors:
Douglas J. Goodnick, Martin G. Leslie, Joseph D. Reasinger
Abstract: A rotary pump for liquid comprising a housing, a shaft carrying a motor rotor, a motor stator fixed in the housing and surrounding the rotor to rotate the rotor and shaft about an axis, where the shaft is mounted in the housing by axially spaced conical bearings each of which includes a first element fixed on the shaft with a first conical bearing surface concentric with the axis and a second journal element carried by the housing with a second conical bearing surface concentric with the axis and slidably engaging the first bearing surface. A biasing element forces the second elements or journals toward each other in an axial direction to compensate for wear between the friction surfaces.
Type:
Application
Filed:
March 12, 2002
Publication date:
September 18, 2003
Applicant:
BUFFALO PUMPS, INC., a Corporation of Delaware
Inventors:
Douglas J. Goodnick, Martin G. Leslie, Joseph D. Reasinger
Abstract: A rotary pump for liquid having a housing, a shaft carrying a motor rotor, a motor stator fixed in the housing and surrounding the rotor to rotate the rotor and shaft about an axis. The shaft is mounted in the pump housing by axially spaced conical bearings, each bearing including a first element fixed on the shaft with a first conical bearing surface concentric with the axis, a coacting second element carried by the housing with a second conical bearing surface concentric with the axis and slidably engaging the first bearing surface and a spring forcing the elements together. This pump includes a wear indicator comprising: a first drive member on the shaft, an imbalance member carried with the second element of a bearing with a second drive member aligned with the first member and movable axially toward the first drive member as the bearing surfaces wear so the first and second drive members engage when the imbalance member moves axially a given distance.
Type:
Grant
Filed:
June 5, 2002
Date of Patent:
September 9, 2003
Assignee:
Buffalo Pumps, Inc.
Inventors:
Douglas J. Goodnick, Patrick R. Linehan, Joseph D. Reasinger
Abstract: The present invention is directed to a pump system. The pump system has a motor, a pump shaft, a pumping section, a connecting column, and a shaft isolator. The motor drives the pump shaft and has a bottom surface above a desired medium. The pumping section has a top surface that receives the pump shaft and pumps the desired medium to a predetermined instrument. The connecting column surrounds a predetermined portion of the pump shaft and connects the motor support and pumping section together. The shaft isolator is positioned between the connecting column and the pump shaft, and extends from the top surface of the pumping section to a predetermined height above the desired medium and below the bottom surface of the motor. The resulting pumped medium has an acceptable amount of entrained air that will not adversely affect the predetermined instrument.
Type:
Grant
Filed:
July 12, 2000
Date of Patent:
November 13, 2001
Assignee:
Buffalo Pumps, Inc.
Inventors:
Douglas J. Goodnick, Kenneth E. Wasch, Martin G. Leslie, Maynard J. Neal