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US 5,254,250 AGranted
Rotary filtration device and filter pack therefor
AssigneeMembrex, Inc.
InventorsPhilip M. Rolchigo, Leonard T. Hodgins, Malcolm R. Kahn
Life of this patent
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AssigneeMembrex, Inc.
InventorsPhilip M. Rolchigo, Leonard T. Hodgins, Malcolm R. Kahn
Estimating the term…
A rotary filtration system comprising a device having a fluid filtration gap between a filter and a rotating member (e.g., a disc), a filter pack for use in the rotary filtration device, and a cartridge formed by structurally connecting (and optionally fluidly connecting) two or more of the filter packs is disclosed. In the filter pack, the filter lies adjacent a permeate collection member, which also desirably can support the filter. The permeate collection member has one or more passageways for collecting the permeate that flows through the filter and is connected to a permeate collection header in the device. The filter pack and device are designed so that the filter pack may be easily inserted into and removed from the device, preferably by moving the filter pack in a direction generally perpendicular to the longitudinal axis of the shaft that rotates the rotating member. Desirably the rotating member and/or filter has one or more spiral grooves in fluid communication with fluid in the gap. Several rotating members and filter packs may be interleaved to increase filtration device capacity and make more efficient use of equipment space. In such a device, the rotating members can be mounted on a common shaft for rotation in unison and can have spiral grooves on both major faces of each rotating member.
A rotary filtration device for filtering fluid into permeate and retentate, said device comprising (a) a readily insertable and removable filter pack, the filter pack being essentially stationary in the device during normal operation and comprising a first filter and a permeate collection member having a first major surface, the first filter being adjacent the first major surface;
The rotary filtration device of claim I further comprising entry means which can be in an open position or in a closed position and which when in the open position allows the filter pack to be inserted into or removed from the rotary filtration device and which when in the closed position helps maintain the filter pack in its normal operating position.
A readily insertable and removable filter pack for use in a rotary filtration device for filtering fluid into permeate and retentate, the filter pack being essentially stationary in the device during normal operation and comprising first and second filters and a permeate collection member having first and second major surfaces and a third surface, the first filter being adjacent the first major surface and the second filter being adjacent the second major surface;
Dependencies are inferred from the claim text.