A filter having a container made of a substantially inert material which has fittings fastened thereto. Various operating portions of the filter are attached to the fittings in a way such that they can be easily removed and access had to the interior of the filter container for cleaning the container or charging it with a fluid medium.

A fluid filter consisting of a helical or spirally wound wire element, a fluid guide pipe disposed within the center of the element and containing a piston-like member responsive to the pressure of the fluid connected to one end of the helical element. When the fluid is pumped, the pressure forces the piston-like member up within the fluid guide pipe, and the helical filter winding is contracted so as to provide effective filtering of dirt and other foreign particles. When no fluid is being pump...

A filter for use in an air or other suitable gas duct system. The filter is mounted in a frame box which in turn is slidably supported in tracks within a rectangular section of the duct. An extension of the rectangular flow passageway provides a chamber into which the frame and filter may be slidably withdrawn from the duct. This chamber is provided with a removable cover to provide access to the filter for removal and replacement thereof. A further embodiment includes a tandem frame assembly an...

A filter wherein a closure member of the filter consists of a single sheet of plate and secured directly to a cylindrical body of the filter, with its peripheral edge tightened to the open edge of said cylindrical body in overlapping relation.

A cigarette holder-filter includes a cigarette receiving socket at one end and a mouthpiece at the other end. The interior of the holder includes a fibrous filtering material impregnated with water. The ends of the holder are sealed in a manner both to prolong substantially the shelf life of the unit and to enable the holder to be filled fully with water. This is achieved by forming a minute air-escape hole in the otherwise sealed mouthpiece end of the filter to enable the interior of the filter...

A rigid filter, useful for example for filtering molten thermoplastic resin as it is forced through a spinnerette head, comprising a rigid block of shaped uniformly permeable material, having continuity and identity of composition and having increased filtering capacity, with a plurality of filtration cavities extending into the block from the top surface and a plurality of drainage cavities extending into the block from the bottom surface.

A filter wherein a plurality of rocking hollow plates are provided as connected alternately with a plurality of fixed hollow plates through washers.

A stacked washer multi-stage impaction and centrifugal separation filtering apparatus with a filter element composed of flat washers having a channel system formed thereon utilizing particle collection pockets to remove and store contaminants. The purpose of the foregoing abstract is to enable the Patent Office and the public generally, and especially the scientists, engineers or practitioners in the art who are not familiar with patent or legal terms or phraseology, to determine quickly from a ...

A filter for fluids in which a generally planar pleated f1lter element of fine mesh wire cloth or the like and a generally planar perforated plate for supporting the pleated element have their marginal portions embedded within a perimetric frame of resilient material.

A filter for filtering oil flowing through a fluid flow passage extending through the inside and outside of a plug forming part of a relief valve of a vane pump. The filter comprises a roll-shaped sheet formed of steel sheet spring and taking a generally cylindrical form. The roll-shaped sheet has overlapping first and second end sections, which are opposite to each other in a peripheral direction of the roll-shaped sheet. The roll-shaped sheet is located in the fluid flow passage and fitted on ...