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US 6,617,367 B1Granted
Internally generated rotor set for low viscosity and abrasive metering applications
AssigneeSealed Air Corporation
InventorsEdward H. Gervais, Souheil Eldanaf
Life of this patent
Estimating the term…
Abstract
An internal gear set comprising an inner rotor having a number of radially projecting cylindrical tooth members engaging a conjugate internally toothed outer rotor. The latter has one more tooth than there are tooth members on the inner rotor and is mounted eccentrically to the inner rotor so that the rotors move conjugately relative to one other.
Claims13
A method of making a two-part polyurethane foam comprising the steps of:
- pumping an isocyanate fluid through a first pump;
- pumping a polyol fluid through a second pump;
- and
- mixing the isocyanate fluid and polyol fluid after the fluids exit the first and second pumps to form a two-part polyurethane foam,
- wherein the first and second pumping actions are effectuated by using an internally generated rotor set which comprises in combination:
- an inner rotor including a support having a predetermined number of fragmental cylindrical recesses equally spaced about its periphery and a rigid cylindrical tooth member received in each recess in rotational sliding contact therewith, each tooth member having substantially the same diameter as the corresponding recess, a portion of each tooth member projecting from the periphery, and
- an internally toothed outer rotor formed as the conjugate of the inner rotor, having simultaneous rolling engagement with all of the tooth members and having a number of teeth one greater than the predetermined number.
4 more elements
A method of making a two-part polyurethane foam including:
- pumping a first abrasive and/or low viscosity fluid and pumping a second abrasive and/or low viscosity fluid, wherein the first and second low viscosity fluids have a viscosity of less than about 10 centipoise, the first and second fluids capable of combining to form a two-part polyurethane foam, wherein the pumping action is effectuated by using an internally generated rotor set which comprises in combination:
- an inner rotor including a support having a predetermined number of fragmental cylindrical recesses equally spaced about its periphery and a rigid cylindrical tooth member received in each recess in rotational sliding contact therewith, each tooth member having substantially the same diameter as the corresponding recess, a portion of each tooth member projecting from the periphery, and
- an internally toothed outer rotor formed as the conjugate of the inner rotor, having simultaneous rolling engagement with all of the tooth members and having a number of teeth one greater than the predetermined number.
A method of making a two-part polyurethane foam comprising the steps of:
- pumping a first abrasive and/or low viscosity fluid through a first pump, wherein the low viscosity fluid has a viscosity of less than about 10 centipoise;
- pumping a second abrasive and/or low viscosity fluid through a second pump, wherein the low viscosity fluid has a viscosity of not more than about 10 centipoise;
- and
- mixing the first and second fluids after the fluids exit the first and second pumps to form a two-part polyurethane foam,
- wherein the first and second pumping actions are effectuated by using an internally generated rotor set which comprises in combination:
- an inner rotor including a support having a predetermined number of fragmental cylindrical recesses equally spaced about its periphery and a rigid cylindrical tooth member received in each recess in rotational sliding contact therewith, each tooth member having substantially the same diameter as the corresponding recess, a portion of each tooth member projecting from the periphery, and
- an internally toothed outer rotor formed as the conjugate of the inner rotor, having simultaneous rolling engagement with all of the tooth members and having a number of teeth one greater than the predetermined number.
4 more elements
A method of making a two-part polyurethane foam including:
- pumping a first abrasive and/or low viscosity fluid through a first pump, wherein the low viscosity fluid has a viscosity of less than about 10 centipoise;
- pumping a second abrasive and/or low viscosity fluid through a second pump, wherein the low viscosity fluid has a viscosity of less than about 10 centipoise;
- and
- mixing the first and second fluids after the fluids exit the first and second pumps to form a two-part polyurethane foam,
- wherein the efficiency of at least the first or second pump is at least 80% for at least about 500 operating hours, and wherein the efficiency of at least the first or second pump is effectuated by using an internally generated rotor set which comprises in combination:
- an inner rotor including a support having a predetermined number of fragmental cylindrical recesses equally spaced about its periphery and a rigid cylindrical tooth member received in each recess in rotational sliding contact therewith, each tooth member having substantially the same diameter as the corresponding recess, a portion of each tooth member projecting from the periphery, and
- an internally toothed outer rotor formed as the conjugate of the inner rotor, having simultaneous rolling engagement with all of the tooth members and having a number of teeth one greater than the predetermined number.
4 more elements
Dependencies are inferred from the claim text.