Abstract: A screen assembly for a vibratory separator has been invented, the screen assembly, in certain aspects, having a panel with two connected pairs of spaced-apart sides including a first pair of spaced-apart side separated by a second pair of spaced-apart sides, a plurality of spaced-apart strips extending between the first pair of spaced-apart sides, each adjacent pair of the plurality of spaced-apart strips defining a space therebetween through the panel, a first mesh bonded to the spaced-apart strips, and a second mesh bonded to the backup mesh. In one aspect a third mesh is bonded to the second mesh. In one aspect the strips are formed from a panel piece by cutting material therefrom with a laser.

Abstract: A screen is disclosed which, in certain aspects, has screening material between opposed frame sides and one or more lower strips beneath the screen. In one aspect these strips are only inteconnected via their ends and not along their lengths. In certain aspects, a plurality of lower strips are bonded to the screen and extend across the screen from one frame side to the other. In one aspect one or more of the strips has one, two, or more humps or ridges corresponding to one or more corrugations in a corrugated perforated plate and/or corrugated screen assembly which is on the plate or, with no plate present, on the strips. In another aspect instead of the strips a solid corrugated perforated plate is used. In one aspect openings or perforations through the plate are triangular. In one aspect the screen is undulating screening material and lower portions of the screening material are bonded to a plate or to strips. Optionally screen mounting hooks or frame edges or screen edges may be used with such screens.

Abstract: A substantially planar screen for a solid particle separator is formed from one or more layers of mesh. The one or more layers of mesh are formed into a series of ridges separated by channels within the plane of the screen. The wire mesh is bonded to a rigid or semi-rigid panel having a plurality of relatively large openings as compared to those of the mesh to create a plurality of repairable screen cells. The support panel is formed with or bent into a series of alternating ridges and channels to create the ridges and channels in the wire mesh when it is bonded to the panel. The cross-sectional shape of the ridges are generally triangular to maximize exposure of surface area of the screen to a flow of material to be separated. Flat surfaces on the ridges and in the channels facilitate repair of screen cells with solid plugs.

Abstract: A screen for a vibratory shaker having a frame with multiple openings. Screen modules or plugs are disposed in each opening. Further disclosed is a mounting apparatus for securing the screen plugs in the openings and a support strip for supporting part of a screen having at least one upturned finger projecting above the top surface of the support body configured for contacting and supporting at least a part of a raised portion of the frame. A plug or module disposed in an opening of a positioning member of a screen assembly for a vibratory separator receives fluid with material therein for separation therefrom. Additionally disclosed is a method for making a plate mesh combination.

Abstract: A screen is disclosed which, in certain aspects, has screening material between opposed frame sides and one or more lower strips beneath the screen. In one aspect a plurality of lower strips are bonded to the screen and extend across the screen from one frame side to the other. In one aspect one or more of the strips has one, two, or more humps or ridges corresponding to one or more corrugations in a corrugated perforated plate and/or corrugated screen assembly which is on the plate or, with no plate present, on the strips. In another aspect instead of the strips a solid corrugated perforated plate is used. In one aspect openings or perforations through the plate are triangular. In one aspect the screen is undulating screening material and lower portions of the screening material are bonded to a plate or to strips. Optionally screen mounting hooks or frame edges or screen edges may be used with such screens. A screening apparatus or shale shaker is disclosed which uses such plates and screens.

Abstract: A substantially planar screen for a solid particle separator is formed from one or more layers of mesh. The one or more layers of mesh are formed into a series of ridges separated by channels within the plane of the screen. The wire mesh is bonded to a rigid or semi-rigid panel having a plurality of relatively large openings as compared to those of the mesh to create a plurality of repairable screen cells. The support panel is formed with or bent into a series of alternating ridges and channels to create the ridges and channels in the wire mesh when it is bonded to the panel. The cross-sectional shape of the ridges are generally triangular to maximize exposure of surface area of the screen to a flow of material to be separated. Flat surfaces on the ridges and in the channels facilitate repair of screen cells with solid plugs.

Abstract: A prosthetic leg has a pivotal knee joint and a hydraulic fluid control unit connected to provide variable forces which dampen flexion and extension of the knee and also bias the leg to its extended position. The unit includes an aluminum housing lined with an axially adjustable sleeve and control bushing defining a cylindrical chamber which receives a piston mounted on a tubular piston rod. The housing and chamber receive hydraulic fluid or oil which flows during movement of the piston through fluid control ports, channel and adjustable gaps defined by the sleeve and bushing for damping the movement of the rod. The piston rod encloses a gas filled flexible bladder which forms an oil accumulator during inward movement of the piston rod and also produces variable forces for moving the piston rod outwardly to its extended position. The housing confines a gap defining ring which compensates for changes in oil viscosity with heat.

Abstract: A filtering device including a tank partially located below floor level having a filtrate compartment and a filter means interposed therebetween. Reservoir means and an end suction centrifugal pump means both located substantially on floor level wherein conduit means selectively permits the filtrate level in the reservoir to maintain a positive pressure at the inlet of the pump when pump is shut off, and to neutralize the pressure differential between the filtrate compartment and the tank.

Abstract: An apparatus for the quick connection and disconnection of a movable filter belt to a conveyor chain. A projection arm is attached to the conveyor chain, with a portion of the arm extending over the filter belt. A plate is attached to the filter belt. The plate has deflectible arms, and one of the arms has an aperture for receiving a portion of the projection arm.

Abstract: An interlock system for an emergency vehicle includes a manual switch to be actuated by a crew member at a rear end of the vehicle for enabling the vehicle to be started only if the he is at his post. The switch controls a relay for electrically energizing the wiper of a single pole double throw ignition switch which has a pair of contacts respectively feeding a starter switch and a buzzer to enable starting of the vehicle and to signal if the engine is shut off with the manual switch still actuated. A pair of indicator lamps, respectively located for view by the driver and the crew member, are energized in response to actuation of the manual switch to indicate that vehicle starting is enabled.