Abstract: A wedge for a concrete post-tension reinforcement anchorage system is shaped such that the compressive force on the tendon after tensioning of the anchorage system is substantially evenly distributed over a length of the outer surface of the tendon that is engaged by the internal surface of the wedge. The external surface of the wedge may have a first section with a first taper angle and a second section with a second taper angle, the second taper angle being larger than the first taper angle. The internal surface of the wedge may have a first section with a first taper angle and a second section with a second taper angle, the second taper angle being greater than the first taper angle. An anchor with a bore with two taper angles and tooth profiles of threading patterns on the internal surface of the wedge are also disclosed.

Abstract: A vehicle comprises a chassis and a tilt cab which is mounted to said chassis and is tiltable with respect to the chassis. The vehicle furthermore comprises a tilting system for tilting said tilt cab relative to the chassis between a lowered position and a raised position. The tilting system comprises a reservoir for hydraulic fluid, a pump and at least one double-acting hydraulic tilt cylinder having a push chamber and a pull chamber. The cylinder has a movable piston and piston rod assembly, wherein the piston separates the push chamber and the pull chamber. The cylinder is connected to the chassis and to the cab, such that when hydraulic fluid is supplied to the push chamber the cab moves to the raised position and when hydraulic fluid is supplied to the pull chamber the cab moves to the lowered position.

Abstract: A hydraulic cylinder comprising: a cylinder body which has an open end with an opening and an edge extending therearound, which cylinder body also has an inner surface; a piston rod; a close-off member which has an insert part, which insert part protrudes in a fitting manner into the open end of the cylinder body, which insert part has an outer circumferential face, wherein the close-off member also has a flange opposing the edge of the cylinder body; coupling means which are operable between the inner surface of the cylinder body and the outer circumferential face of the insert part for securing, in at least one axial direction, the close-off member in the cylinder body, and a clamping ring which is clamped between the flange and the edge at the open end of the cylinder body. The clamping ring is made of a resilient, compressible material, in particular is made of an elastomer. The clamping ring is clamped, when compressed in the axial direction, between the flange and the edge at the open end.

Abstract: A rope and a method of constructing the rope. The rope may be of 12×12 braided construction and include a core for its length. The rope includes a plurality of primary strands, and each of the primary strands includes a plurality of fibers which may be made of a high-friction material. The rope also includes a secondary strand surrounded by the plurality of primary strands. The secondary strand includes a plurality of fibers which may be made of a low-friction material.

Abstract: An apparatus for moving a slide-out room disposed in an aperture of a side wall of a vehicle from a retracted position to an extended position in a drive direction. The apparatus includes a drive assembly supported by the side wall of the vehicle and a driven assembly driven by the drive assembly. The driven assembly is connected to a wall of the slide-out room such that the slide-out room moves with the driven assembly from the retracted position to the extended position in the drive direction and the driven assembly is movable in a transverse direction generally perpendicular to the drive direction relative to the wall of the slide-out room. The room is extended and retracted horizontally and moved between upper and lower positions vertically in a square Z or square h pattern.

Abstract: A wedge for a concrete post-tension reinforcement anchorage system is shaped such that the compressive force on the tendon after tensioning of the anchorage system is substantially evenly distributed over a length of the outer surface of the tendon that is engaged by the internal surface of the wedge. The external surface of the wedge may have a first section with a first taper angle and a second section with a second taper angle, the second taper angle being larger than the first taper angle. The internal surface of the wedge may have a first section with a first taper angle and a second section with a second taper angle, the second taper angle being greater than the first taper angle. An anchor with a bore with two taper angles and tooth profiles of threading patterns on the internal surface of the wedge are also disclosed.

Abstract: An apparatus for balancing a plurality of cells in a battery includes common bus having a connector for connecting to a common bus of another battery. Each of plurality of balancing circuits has a bidirectional voltage converter connected to a given cell of the plurality of cells and a linear current regulator arrangement controls the magnitude of current flow between the bidirectional voltage converter. A controller is connected to the common bus and the plurality of cells and selectively operatives the plurality of balancing circuits to transfer energy between the plurality of cells and the common bus to balance the states of charge of the cells. The balancing circuits are operated in response to actual states of charge of the cells, an average state of charge, a desired voltage level for the common bus, and an actual voltage level on the common bus.

Abstract: A hydro-pneumatic system has an air powered motor driving a hydraulic pump with a pressure limiting valve that turns off air flow to the air motor when a hydraulic pressure output by the pump at a sense port of the valve reaches a certain limit. A valve element of the valve has spring, hydraulic and pneumatic sections, with an unbalanced area of the hydraulic section in a sealed pressure chamber of a cartridge that is part of the valve housing. The pneumatic section extends out one end of the cartridge to fill a bore between the air inlet and outlet ports when the pneumatic section is extended, and allow air to pass when it is retracted.

Abstract: A torque overload clutch comprises outer and inner members. A recess is formed in the outer member and a radial opening is formed in the inner member. A driving member is slideably captured in the opening to move between an extended, engaged position with the recess and a retracted, disengaged position. An actuator ring is urged by a spring into engagement with the driving member to bias the driving member toward the engaged position. An end of the driving member may engage the recess to define an engagement angle that is approximately between thirty-four and seventy degrees relative to a radially oriented reference. The driving member may be slideably captured in a liner seated in the opening, and one or both may be impregnated with a lubricant. A bearing may be positioned between the inner and outer members to inhibit relative movement along the clutch axis.

Abstract: A butterfly valve for a turbocharger system in which the leak path through the valve is controlled by keeping the clearance between either a shaft of the valve and two bushings small or the clearance between the bushings and the counter bores in the valve element small, and making the other clearance larger.

Abstract: A lost motion piston assembly comprising a lost motion cavity formed within a piston and a lost motion piston disposed within the lost motion cavity. The lost motion piston forms a sealed gas cavity. The sealed gas cavity contracts when the actuator is extended under pressure into the cylinder space and expands under pressure when the actuator is retracted by relieving pressure in the cylinder space.

Abstract: A support device for persons, such as a bed, treatment or operating table, chair, comprises: —a frame; —a first and a second movable member, which movable members can be adjusted independently of one another and which are designed to support the person or one or more parts of the person in various positions, and —a hydraulic system for adjusting the movable members, the hydraulic system comprising: —a reservoir for hydraulic liquid; —a first and a second hydraulic actuator associated with the first and second movable member, respectively, which hydraulic actuators can each be moved in two directions; —a hydraulic pump; —a pump activating member which is operatively connected to the pump in order for an operator to activate the pump; —a valve assembly which is provided in the hydraulic circuit between the pump and the respective actuators, and —a valve assembly operating member which can be mechanically operated by an operator and is mechanically connected to the valve assembly for selecting and providing a co

Abstract: An apparatus receives power from a prime mover to move a punch relative to a die and thereby form a hole in a wall. The apparatus includes a draw stud that translates to move the punch relative to the die to form the hole. The draw stud is detachable from the apparatus by driving the draw stud such that a key exits a keyway, rotating the draw stud to detach the draw stud from a transmission element, and thereafter removing the draw stud from a draw stud passageway.

Abstract: An electrical switch includes a pivotally supported blade, a toggle mechanism, and an operating mechanism. The operating mechanism is drivable in a first direction to pivot the blade about a first axis and toward a closed blade position. When pivoting toward the closed blade position, the toggle mechanism inhibits the blade from pivoting about a second axis. Upon reaching the closed blade position, continued motion of the operating mechanism in the first direction causes the toggle mechanism to pivot the blade about the second axis toward a closed contact position. In the closed contact position, the blade contacts at least one blade contact to electrically connect the blade and a first electrical terminal.

Abstract: The invention provides for a hydraulic cylinder position sensing and locking system that automatically maintains the position of a lock nut (36) that engages a plunger (16) on a hydraulic actuator such that if hydraulic pressure is lost, the lock nut prevents retraction of the plunger into the hydraulic cylinder (14). The hydraulic cylinder position sensing and locking system also provides for a position sensing feature that allows for the calculation of the axial stroke position of the plunger based on rotary movement of the lock nut. In addition, the invention provides for a synchronous hydraulic cylinder position sensing and locking system and methods of using both the hydraulic cylinder position sensing and locking system as well as the synchronous hydraulic cylinder position sensing and locking system.

Abstract: The fluid cylinder assembly concept includes a valve that automatically diverts fluid between pressure chambers when a plunger nears its end of stroke to inhibit the plunger from overtravel.

Abstract: A portable apparatus for pulling a cable through a conduit includes a frame that has a base and caster wheels. The apparatus further includes a boom that has at least one roller configured to guide a rope connected to the cable along the boom. The boom also includes a main boom pivotally connected to the base and an upper boom pivotally connected to the main boom. A drive unit connects to the boom and includes a rotatable spool configured to pull the rope along the boom. The apparatus further includes a lift pivotally connected to the frame and the boom. The lift is operable to move the boom relative to the frame.