Abstract: A method of managing engine load by adjusting the pump and motor displacements of a dual path electronically controlled hydrostatic transmission utilizes the difference between the reference and actual engine speeds, the temperature of the working fluid for the dual path electronically controlled hydrostatic transmission, the engine governor droop value, the vehicle speed and lookup tables to determine pump and motor command adjustment factors associated with specific engine loading conditions.

Abstract: A ramping subsystem of a control system for a dual path electronically controlled hydrostatic transmission is used to modify the commanded rate of change of pump and motor acceleration, deceleration and direction change command (performed to command machine motion from forward to reverse or vice versa) in order to achieve desired machine performance and operator feel. Pump and motor acceleration, deceleration and direction change command rates are then further modified using scaling tables based on selected maximum machine speed using operator input device.

Abstract: The straight tracking control system can use a control method to achieve a desired straight motion of a machine with a dual path electronically controlled hydrostatic transmission. In the control method, the first drive system, e.g., the left or right drive system, pump solenoid current can be modified based on first and second drive system velocity feedback when the machine is commanded to move in a straight line path in the forward or reverse direction. A memory latching concept is used to latch the straight tracking factor at the initiation of and during the turn so the same straight tracking factor is used throughout the turn. The straight tracking factor is unlatched at the completion of a turn after a specific time delay and a new straight tracking factor can be calculated. The straight tracking method also utilizes transmission fluid temperature and utilizes additional fluid reserve in order to maintain straight machine movement.

Abstract: A mount for a screen assembly, a screen assembly with such a mount, and a vibratory separator (e.g., a shale shaker) with such a screen assembly; the mount in certain aspects including a body with an inwardly projecting handle apparatus accessible when the screen assembly with such a mount is located in operation position on a mount structure of a vibratory separator.

Abstract: This application is for a unique system for robotic movement and dexterity using the concept of utilizing pressurized compressed air to contract and/or retract limbs, joints, fingers or any attached device, attachment and/or extremity, such as used for gripping or releasing, movement, ambulation, dexterity or fine motor skills. The system relies upon an on-board computer/central processing device or system which would use relays or solenoids to direct pressurize air or create a closed-loop pressurization within the robot. A “lung” or storage container to house pressurized air would be located on board the robot. Tubing, valves, solenoids, switches, relays or anything to carry or distribute the pressurized air to extremities or other areas of the robot for movement, ambulation, dexterity, gripping or release, fine motor skills, power regeneration, or any other use by the robot.

Abstract: Interconnectible screen assemblies for vibratory separators or shale shakers and methods for manipulating such screen assemblies which, in certain aspects, include a first screen assembly and a second screen assembly positioning at least a portion of the first screen assembly with respect to the second screen assembly, releasably connecting the second screen assembly to the first screen assembly, and moving the first screen assembly and the second screen assembly together.

Abstract: Interconnectible screen assemblies for vibratory separators or shale shakers and methods for manipulating such screen assemblies which, in certain aspects, include a first screen assembly and a second screen assembly positioning at least a portion of the first screen assembly with respect to screen assembly holding apparatus, connecting a second screen assembly to the first screen assembly with at least one pin projecting from the first screen assembly into a corresponding recess of the second screen assembly, and moving the first screen assembly and the second screen assembly together.

Abstract: A vibratory separator and a screen mounting basket for a vibratory separator for separating components of material introduced into the basket, the vibratory separator including a collection receptacle beneath the basket, at least one screen assembly mounted in the basket, and at least one dam within the basket for intercepting material introduced into the basket, and for forming a relatively deep pool of material over one or more of the screen assemblies.

Abstract: A vibratory separator (in one aspect a shale shaker) and screen assemblies for them; the screen assemblies, in at least certain aspects, having an undulating plate with a plurality of spaced apart openings therethrough, a plurality of spaced apart supports extending beneath the plate and to which the plate is secured, and each support having a length and independent of and not connected to the other supports along its length, each support having two spaced apart ends, and screening connected to the plate.

Abstract: A screen assembly for mounting on mounting structure of a vibratory separator, the mounting structure having at least one support part, and methods of its use, the screen assembly including a frame with a first frame end, a second frame end and a first side and a second side, at least one crossmember, extending from the first frame end to the second frame end, and spaced-apart from the sides, the frame having a top and a bottom, the at least one crossmember having a top and a bottom positionable above and adjacent a support part of the mounting structure, screening material on the frame, and space maintenance apparatus on the bottom of the at least one crossmember for occupying a space between the crossmember and the support part.

Abstract: A screen mounting basket for a vibratory separator for separating components of material introduced into the basket, the vibratory separator including a collection receptacle beneath the basket, the basket including two opposed spaced-apart side walls having first ends and second ends, the first ends spaced-apart by spaced-apart end walls connected to each of the side walls, a basket bottom between the two spaced-apart side walls, at least one screen assembly positioned vertically in the basket for interceptions material introduced into the basket and for screening said material, and the at least one screen assembly extending from one side wall of the basket to the other.

Abstract: A screen assembly, a vibratory separator with such a screen assembly and methods of its use, the screen assembly, in certain aspects, having a frame with a first frame end spaced apart from a second frame end by two opposed spaced-apart sides including a first side and a second side, screening material on the frame, a plurality of crossmembers spaced apart and extending from the first side to the second side, each crossmember of the plurality of crossmembers connected to the first side and the second side, and each crossmember of the plurality of crossmembers having at least one series of openings therethrough; in one particular aspect the frame having crossmembers located to facilitate sealing of the support against screen assembly mounting structure of a vibratory separator; and methods for using such frames and such screen assemblies.

Abstract: A method for mounting a screen assembly to a screen mounting structure of a vibratory separator to effectively seal the screen assembly in place, the method in certain aspects including locating the screen assembly on a screen mounting structure of the separator, positioning the screen assembly so that crossmembers of a four-sided generally rectangular support of the screen assembly are either all parallel to or are all transverse to a direction of material flowing across the screen assembly, forcing two sides of the support of the screen assembly down with a crowning apparatus to effect crowning of the screen assembly, the support sufficiently flexible so that two sides thereof other than the two forced-down sides sealingly contact a surface of the screen mounting structure along substantially all of their length.

Abstract: A screen assembly, a vibratory separator with such a screen assembly and methods of its use, the screen assembly, in certain aspects, having a frame with a first frame end spaced apart from a second frame end by two opposed spaced-apart sides including a first side and a second side, screening material on the frame, a plurality of crossmembers spaced apart and extending from the first side to the second side, each crossmember of the plurality of crossmembers connected to the first side and the second side, and each crossmember of the plurality of crossmembers having at least one series of openings therethrough; in one particular aspect the frame having crossmembers located to facilitate sealing of the support against screen assembly mounting structure of a vibratory separator; and methods for using such frames and such screen assemblies.