Abstract:
A filtering apparatus and method comprises parallel filtering elements backflushable with the pressure of the filtered flow. At least one washing organ connecting alternately to the different filtering elements, forms a discharge channel for the washing flow. A freewheel clutch is connected to a rotating axle of the washing organ, converting reciprocating movement generated with the pressure of flow in the filtering apparatus and with pressure alternating with it into a continuously parallel, stepping rotary movement of the washing organ. The mechanism containing the clutch may be outside the filtering room of the apparatus, and based on the alternation of the higher pressure of the flow filtered in the apparatus and the lower pressure from the discharge channel. The freewheel clutch is articulated to a piston in the cylinder, and is moved back and forth with the pressure difference, controlled by the channels relaying the pressure and by the valves.
Abstract:
A caged filter cartridge assembly has a pair of coaxially spaced-apart end plates, and a number of tubular filter cartridges extending between said end plates. These end plates include seat recesses having a coaxially disposed retaining ring establishing an annular terminal lock edge. The filter cartridges include end caps at each opposed end thereof which are received within respective ones of said seat recesses. The end caps have at least one annular lock ring which is forcibly engaged with the terminal annular lock edge of the retaining ring so as to join the end cap, and thus said filter cartridge, to the end plates.
Abstract:
A liquid filtration device having a backwashing feature in which liquid flow through the device is reversed with a plate being rotated under the filtration cartridges to allow reverse liquid flow into the individual filtration cartridges to produce the backwashing action.
Abstract:
The apparatus comprises a housing having an inlet and an outlet. The apparatus uses a single central rod coupled to one end of the housing. A support member is coupled to the other end of the rod. The support member has a plurality of threaded apertures extending therethrough through which threaded members are screwed for use for holding annular filter members in place. The support member and threaded members may be used at either end of the housing to hold the filter members in place. In several embodiments, the threaded members have convex, conical shaped ends which mate with concave conical shaped surfaces of seal members which act to center and seal the ends of the annular filter members.
Abstract:
A system is provided for changing hydraulic oil in vehicles such as airplanes, which enables rapid replacement of dirty oil and rapid cleaning of oil to meet military/commercial aircraft specifications for reuse. The apparatus includes a frame (40), dirty and clean oil tanks (14, 16) mounted on the frame, a filter tank (30) with filters (32) mounted on the frame, and pump and valve means (20) for controlling the flow of oil. Initially, the apparatus is rolled up to an airplane, dirty oil in the hydraulic reservoir of the plane is pumped into the dirty oil tank, and clean oil from the clean oil tank is pumped into the airplane reservoir. Thereafter, while the apparatus is moved or is stationary, dirty oil from the dirty oil tank is pumped through filters of the filter tank and into the clean oil tank for an initial cleaning, and thereafter the oil is continually circulated from the clean oil tank through the filtered tank and back to the clean oil tank to polish the oil. The filter tank includes a filter region divider (64) that divides the filters into two groups (90, 92), a manifold divider (66), and a series conduit (84) that connects the first manifold region part (74) to the second filter region part (72).
Abstract:
A fluid filter has separable upper and lower housing portions releasably joined in assembled relation wherein the lower housing portion closes the open lower end of the upper housing portion to form a fluid inlet chamber in the upper portion communicating with an unfiltered fluid inlet in the lower portion, and removable filter cartridges mounted on the upper end of the lower housing portion within the fluid inlet chamber in the upper portion and internally communicating with a filtered fluid outlet in the lower portion. The upper housing portion is separable from the lower housing portion to uncover the full lengths of the filter cartridges in a manner which facilitates periodic removal and replacement of the cartridges for cleaning or replacement of damaged cartridges and permits close inspection of the sealed ends of the cartridges to assure proper sealing of replaced cartridges to the lower housing portion prior to reassembly of the housing portions.
Abstract:
A filter assembly particularly useful for the nuclear industry is provided with a number of cylindrical cartridge filters attached to a plenum chamber which is formed by a rotational moulding process. A rod is provided on the assembly which can be attached to an automatic handling device to allow remote fitting and removal of the filter assembly into and from a casing. The assembly is easy and cheap to manufacture and can be destroyed after use.
Abstract:
A filter element for use in a filter apparatus comprises a plurality of cylindrical filter units coaxially aligned end-to-end to form an integral tubular structure, a top end cap and a bottom end cap on the upper opening and the lower opening, respectively, of said tubular structure, and a cylindrical displacement member disposed coaxially within the tubular structure with a small clearance therebetween.
Abstract:
A filter has circularly arranged filter elements open on both ends mounted between two separation plates in a filter housing. The plates separate the raw liquid inlet end from a clean liquid discharge section and separate both of these from an outlet end for the dirty liquid. Both ends of each filter element are connected through passages in the separation plates with the inlet and outlet ends. Rotary valves are connected nonrotatably with each other to open and close the connections between the filter elements and the inlet and outlet spaces. Only one rotary slide valve is provided on each side of the separation plates facing away from each other. The rotary slide valve on the admission side covers fewer passages than the rotary slide valve on the opposite side. The total number of passages covered by the rotary slide valves is the same as the total number of filter elements.
Abstract:
An insert for placement between concentric cylindrical filter elements comprises in a one-piece construction a tubular cylindrical body and pairs of parallel slits in the body each forming therebetween a strip of material connected to the remainder of the body at the ends of the strip. The strips are bowed inwardly away from the remainder of the body between their ends to form protrusions extending transversely from the remainder of the body.