Fluid handling – Flow affected by fluid contact – energy field or coanda effect – Means to regulate or vary operation of device
Patent
1979-01-24
1981-01-20
Frinks, Ronald L.
Fluid handling
Flow affected by fluid contact, energy field or coanda effect
Means to regulate or vary operation of device
137847, 13753311, 251 65, A61F 122
Patent
active
042453585
ABSTRACT:
An improved valve prosthesis for causing nontraumatic unidirectional flow of a pulsatory fluid, such as blood, through a conduit, such as a blood vessel. The valve includes two flaps, made of a suitable flexible material, attached by the proximal ends to opposite sides of a covered annular mounting structure. A pair of magnetic members are connected to the distal ends of the flaps thereby to exert sufficient attractive force to hold the flaps together in a closed position to prevent fluid flow through the valve. The magnetically-closed flaps are forced to an open position by the pressure of the fluid flowing through the conduit. A decrease in fluid pressure in combination with the attractive force exerted by the magnetic members permits the smooth, nontraumatic closure of the valve flaps.
REFERENCES:
patent: 3409038 (1968-11-01), Blackford
patent: 3736598 (1973-06-01), Bellhouse et al.
patent: 3898701 (1975-08-01), La Russa
patent: 3959827 (1976-06-01), Kaster
"The Direct Approach for the Correction of Aortic Insufficiency" by C. A. Hufnagel et al., J.A.M.A., vol. 178, No. 3, Oct. 21, 1961, pp. 275-279.
"Comparative Study of Some Prosthetic Valves for Aortic and Mitral Replacement" by C. A. Hufnagel et al., Surgery, vol. 57, No. 1, Jan. 1965, pp. 205-210.
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