The invention provides a clog-resistant filter for separating solids from liquids, of the type wherein the liquid is passed from a filter inlet through a circular-section hollow filter element the filter being provided with means for the discharge of collected solids during filter operation, the filter comprising a housing provided with an inlet for the liquid to be filtered and provided with a first outlet for filtrate and with a second outlet for liquid containing a high concentration of solid...

A filter composed of a mesh structure substrate having deposited thereon and therein activated carbon fiber treated with an alkali and having a length within the range of from 5 to 1,000.mu., wherein the mesh structure substrate has an average cell diameter 3 to 100 times the length of the activated carbon fiber, wherein the activated carbon fiber is adhered to the substrate by a binder, and wherein the activated carbon fiber is deposited on and in the substrate by impregnating the substrate wit...

A filter for mounting on the fresh-air entrance on motor vehicles. The filter is in the form of a cartridge which is designed for mounting on the fresh-air entrance on the vehicle to cover the entrance entirely. The filter comprises a coarse filter for separation of particles entrained in the air and a chemical action filter for chemically cleansing the air entering into the vehicle.

The filter is formed by a wall (6) separating a vacuum chamber (3a, 3b) from a space (1) where a paint spray gun (2) is located. The lower part (5) of the wall (6) dips into the water of a collecting tank (7). The wall (6) is pierced by a multiplicity of holes, in each of which is fastened a tube (8) projecting on its two faces. On the same side as the vacuum chamber (3a, 3b), each tube is equipped with a deflector (10) at its outflow. Water from a reservoir (11) flows off via an overflow (12) a...

A filter has a honeycomb structural body having a plurality of large-capacity through holes and small-capacity through holes placed in parallel with one another in a length direction. A total (a) of lengths in the cross section of wall surfaces of one large-capacity through hole, the wall surfaces being shared by the one large-capacity through hole and adjacent large-capacity through holes to a total (b) of lengths in the cross section of wall surfaces of one large-capacity through hole, the wal...

A filter for exhaust gases produced by an internal combustion engine, and a method of using such a mat on a vehicle. The filter is a mat of fibers enclosed within a metal gauze. Preferably, the mats are corrugated and spaced apart within a housing such that exhaust gases will pass through the mats sequentially. The fibers are wettable, and in use are preferably located a sufficient distance from the engine such that the mat is wetted by condensing water or other liquid in the exhaust gas. Prefer...

A filter is disclosed including a four-sided frame having a central aperture therein. Four side walls are provided, with each side wall being pivotally mounted to one side of the frame, and movable between a use position wherein each side wall is substantially perpendicular to the frame, and a storage/shipping position wherein each side wall is substantially parallel to the frame. The filter further comprises a filter member attached to the frame and extending across the central aperture. In the...

The object of the present invention is to obtain a high precision notch filter or all-pass filter. Therefore, two transconductance circuits for adjustment, which perform a voltage-current conversion of a difference between a voltage of a filter input terminal and a voltage of a filter output terminal, are added to two integrators comprising two transconductance circuits for the integrators, and two capacitors. An output current of one transconductance circuit for adjustment is added to an output...

A filter having a thin metal flanged embedded within an open wall portion of a transparent plastic housing. The metal flange is permanently and non-detachably embedded within the wall and connected to a filter cover plate to create a fluid-tight seal. The resulting transparent spin-on filter allows a user to visually inspect the condition of the circulating fluid and filter without removing the filter from an operating system.

A filter has a plurality of series circuits each including a reactance element and a switching element and the series circuits are connected in parallel. The switching elements are driven by clock pulses of the same period. When the switching elements are driven simultaneously, information stored in the reactance elements is cleared, whereby the filtering band can be switched over at high speed.