Patent ID: 6036463
Filing Date: 2000-03-14
Classification: F01C

Abstract:
A pump comprising:a housing;a master rotor mounted for rotation on the housing about a first axis, the master rotor being connectable to a power source so as to be rotated thereby, the motor rotor further including a first contoured faces and defining at least part of a sphere having a center;a slave rotor mounted for rotation on the housing about a second axis in response to rotation of the master rotor, the slave rotor including a second contoured faces and defining at least part of a sphere having a common center with the center of the master rotor;the first axis and second axis being offset from being collinear by an angle .alpha. and intersecting at the common centers of the rotors;each contoured face including a contact face and a side face, and the contact faces and side faces define vanes that cooperate to form chambers that change volume with rotation of the master and slave rotors about the first and second axis respectively;each contoured face of each rotor being defined by the locus formed as the rotors rotate about their respective axes by points on the other rotor;the points of each rotor that define the locus lying along an outer edge of a cone whose central axis is essentially a radius extending outward from the common centers of the rotor at an angle .alpha./2 from a normal to the axis of the other rotor; andports disposed to allow fluid to be taken into the chambers and then be expelled out of the chambers at an increased velocity and/or pressure in response to rotation of the master and slave rotors of the pump.