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US 4,779,575 AGranted
Liquid friction heating apparatus
OwnerEugene W. Perkinsinventor
Life of this patent
Estimating the term…
Abstract
Liquid friction heating apparatus includes a pump rotor and an impeller rotor in a liquid reservoir. As the pump and impeller are rotated they impart frictional heat to the liquid. Further, the pump at all times delivers liquid to the inlet of the impeller which impells the liquid through restricted orifices to further heat the liquid. The pump positively prevents cavitation and ensures a constant flow through the orifices.
Claims8
Apparatus for heating liquid comprising:
- a. an enclosed housing defining a reservoir containing a heat transfer liquid;
- b. an impeller disposed within said housing said impeller comprising:
- i. a cylindrical rotor having an external surface including a peripheral surface said surfaces being in frictional engagement with the liquid in said housing;
- ii. a central inlet cavity in said rotor;
- iii. fluid passages leading from said inlet cavity to the peripheral surface of the rotor;
- said passages being arranged relative to the axis of rotation of said rotor that upon rotation thereof in a predetermined direction liquid is impelled by centrifugal force to flow from said inlet cavity through said passages outwardly of said rotor;
- and
- iv. restricted orifices in said fluid passages to cause liquid to become frictionally heated as it is impelled through said orifices;
- c. means for rotating said rotor within said liquid in said housing in said predetermined direction;
- and
- d. pump means for delivering liquid from said housing directly to said central inlet cavity of said rotor at all times while said rotor is rotated in said predetermined direction.
8 more elements
Dependencies are inferred from the claim text.