Abstract: A phased array radar configured to transmit two or more slightly misaligned beams, for improved angular resolution. The transmitting array is split into two or more subarrays that transmit slightly misaligned beams that may have a common carrier frequency and each of which has a different modulation. Each subarray may include alternate elements in the rows of the transmitting array, and alternate elements in the columns of the transmitting array. The width of each transmitted beam may be greater than or comparable to the diffraction-limited width, but the region in which the beams overlap may be significantly narrower than any of the transmitted beams. The reflected beam from a target contains one or more of the modulations of the transmitted beams, in proportions depending on the location of the target, and the extent to which it is illuminated by each beam.

Abstract: A compressor moves a fluid from an inlet to an outlet and provides a pressure differential there between due to respective pistons moving in and out of a plurality of piston chambers via a piston rod. A rotating shaft extends through a grooved end plate, and the rotating shaft is connected to either the grooved end plate or the piston rod. The grooved end plate defines an off center or eccentric groove. A bearing extends from the piston rod and fits within the groove such that when the rotational motion of the shaft rotates either the piston rod or the grooved end plate, the piston rod slides back and forth relative to the rotating shaft. Each position of the bearing within the groove determines a corresponding position of the piston rod relative to the rotating shaft. Each pair of pistons may extend from a single, continuous piston rod.

Abstract: A pump assembly includes a housing and first and second valves. The housing has a fluid inlet port and a fluid outlet port. The first and second valves are substantially identical valves both including a mounting portion, a valve seat and a valve body. The mounting portion has a first end and a second opposite end. The first and second ends are both selectively mountable to a conduit defining a fluid path. The valve seat is interconnected to the mounting portion. The valve body is interconnected to at least one of the mounting portion and the valve seat for movement relative to the valve seat between a seated position and a closed position. The valve body includes a first side and a second side and is operative to seal against back flow from the first side and open to positive pressures on the second side. The first valve is mounted to the fluid inlet port with the first end such that the first valve normally functions to only permit fluid to flow into the housing.

Abstract: A restarting device of a pump including a center rod defining fluid delivering chambers and driving chambers 11b and 12b. The restarting device of the pump further includes: a change-over valve 2 for switching a direction for the center rod to move, and a restarting hydraulic circuit 3 which, when a supply of the driving fluid from the change-over valve 2 to the driving chambers 11b and 12b in both sides is stopped, detects the supply of the driving fluid into the driving chambers 11b and 12b in both sides having been stopped and then causes the driving fluid to flow into the change-over valve, thereby restarting the supply of the driving fluid into the driving chambers 11b and 12b.

Abstract: An air pump is capable of inflating and deflating an inflatable object and is formed of a main body having a cylinder duct, an air outlet and an air inlet in communication with the cylinder duct. The air in the cylinder duct is let out via the air outlet. The atmospheric air is let into the cylinder duct via the air inlet. Two check valves are disposed respectively at the air outlet and the air inlet. A compressing member has a piston which is movably disposed in the cylinder duct of the main body. An adjustment member is pivoted to the main body such that the adjustment member is displaced between a first position and a second position, so as to enable the adjustment member to be in communication with the air outlet or the air inlet to bring about the inflating function or the deflating function.

Abstract: A self-aligning double-acting simplex plunger pump comprising first and second combined plunger stuffing box and head members or blocks. A manifold is adapted to be abutted against one surface of the blocks and second spaced apart parallel surfaces of the blocks are abutted against the axial end face of a motor. Alignment means on the motor and on the blocks assure proper alignment of the blocks with respect to a piston driven by the motor which reciprocates between the blocks along a longitudinal axis.

Abstract: A manifold for a double acting metering cylinder having a fluid tight reciprocal piston forming a pair of expandable and retractable chambers, the manifold having a housing with passageways therein and directional valves to selectively deliver fluid material to the first chamber while delivering fluid material away from the second chamber during a forward stroke of the piston and delivering fluid material to the second chamber while delivering fluid material away from the first chamber during a return stroke of the piston.

Abstract: An air pump for use with a chain-driven bicycle having a freewheel. The pump assembly comprises a pair of opposed cylinders and a double-ended piston rod mounted in a housing. The piston rod has a bearing slot which engages a crank pin on a crankshaft which is driven by a sprocket. Rotation of the sprocket reciprocates the double-ended piston rod in the cylinders. A hook-shaped extension of the housing fits over the top of the chain stay of the bicycle, and a vertically movable clamping member provided with a ratchet mechanism abuts the underside of the chain stay; a lever operated cam clamps the chain stay intermediate the hook portion and the clamping member. The lower run of the bicycle drive chain engages the drive sprocket of the pump assembly. Reverse rotation of the bicycle's crank assembly causes the conventional freewheel to also rotate in a reverse direction without rotating the wheel of the bicycle.

Abstract: A double acting simplex plunger pump comprising a pair of unique unitary combined stuffing box and head members pre-assembled with a double ended plunger, the subassembly being sandwiched between the axial end face of a drive motor and a flat surface of a unitary manifold means and further characterized by means including check valve means for aligning and holding the members.

Abstract: A double acting simplex plunger pump comprising a pair of unique unitary combined stuffing box and head members pre-assembled with a double ended plunger, the subassembly being sandwiched between the axial end face of a drive motor and a flat surface of a unitary manifold means.

Abstract: A resonant reciprocating compressor wherein a reciprocating assembly comprising the movable armature of an electric reciprocating motor and a piston means coupled to the armature is driven cyclically when the electric motor is energized from an alternating current source to compress a working fluid, and including means operatively associated with the reciprocating assembly for producing a stabilizing force gradient in a direction to maintain or restore the reciprocating assembly to a centered operating position.

Abstract: A diaphragm pump has at least one double-acting piston moving in a cylinder closed at its ends by diaphragms and filled with oil. The diaphragms are capped by cylinder heads defining the chambers in which warping of the diaphragms produces the suction and discharge of liquid to be pumped through suction and discharge tubes each having a one-way valve therein. The diaphragms are centrally connected to the piston ends by screws whose screw heads have the form of a large diameter, concave metal cup. The screw head concavity faces the cylinder heads and has an internal surface provided with, for example, annular reliefs, ensuring a large contact surface between the screw heads and the pumped cooling liquid.

Abstract: The invention concerns a reciprocating pump for liquid substances, specifically such contaminated by solids. To render such a reciprocating pump self-cleaning, it is suggested to arrange the intake chamber (7), pressure chamber (2), and the pressure chamber (8) side by side in a horizontal or only slightly declining plane, to arrange the check valves (9, 10, 11, 12) side by side in the same horizontal or slightly declining plane, and to have the pressure socket (20) empty on the bottom side of the pressure chamber. In addition, the intake socket (19) empties suitably from below, vertically or at least steeply rising, into the intake chamber. This design ensures that the paths within the pump extend essentially horizontally or only slightly upwardly, so that any solid particles which have proceeded into the pump housing can be carried out of the pump again.