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US 4,411,292 AGranted
Fluid flow restrictor device
OwnerArminio Schillerinventor
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OwnerArminio Schillerinventor
Estimating the term…
A fluid flow restrictor device, capable of producing a precise rate of fluid flow, comprises a closed spiral coil of wire contacted on at least one face by a member so as to define therewith a spiral passageway of precise cross-section, there being a fluid inlet at one end of the spiral passageway and a fluid outlet at the other end. In several preferred embodiments of the invention described, the closed spiral coil of wire is disposed between an inner member in contact with the inner face of the coil, and an outer member in contact with the outer face of the coil, one of the members closing the spiral passageway between it and the respective face of the coil, thereby leaving the other spiral passageway for conducting the fluid. At least one of the members is resiliently deformable to increase the cross-sectional area of the passageway to permit flushing the device.
A fluid flow restrictor device including a spiral passageway defined by a closed spiral coil of wire disposed between an inner member contacting the inner face of the coil and an outer member contacting the outer face of the coil, there being a fluid inlet at one end of the spiral passageway and a fluid outlet at the other end of the spiral passageway, characterized in that the spirals of the coil are in contact with each other and are unbonded to each other such that they define with at least one of said members a spiral passageway of precise cross-sectional area, and in that at least one of said members is resiliently deformable to increase said cross-sectional area of the passageway and thereby to permit flushing the device.
Dependencies are inferred from the claim text.