Abstract: An improved lighting fixture is disclosed for imaging a high-intensity beam of light at a distant location. A specially-faceted near-elliptical reflector cooperates with a gate aperture and a single aspheric lens to produce a beam that incorporates a very high proportion of emitted visible light, while the reflector has a dichroic coating that reflects only a low proportion of infrared light. The projected beam thereby has a relatively low energy density, such that the front portion of the fixture can be reduced substantially in size and weight. The gate is selectively rotatable relative to the fixture's rear housing.

Abstract: A hydraulic pump apparatus which is provided with a sleeve member sealingly accommodated in a housing, a cam member driven by a motor and slidably mounted in the sleeve member, a plunger abutting against the cam member, a plunger chamber housed in the sleeve member, a capacity of which varies in accordance with a slide movement of the plunger, a suction passage and an ejection passage formed in the housing, a fluid introducing passage communicating with the suction passage of the housing, a suction valve disposed between the fluid introducing passage and the plunger chamber, an ejection valve disposed between the plunger chamber and the ejection passage of the housing, a hollow engaging member for preventing the plunger from rotating with respect to the housing, the engaging member is disposed at a position bridging the suction passage of the housing and the fluid introducing passage of the sleeve member.

Abstract: A downhole jet pump has a nozzle assembly arranged respective to a pump housing whereby the nozzle assembly can be circulated uphole from the pump and circulated back downhole to the pump in order to renew the nozzle assembly. A special packer nose assembly enhances the retrieval and installation of the nozzle assembly within the downhole pump. The nozzle assembly is replaced without having to pull the pump.

Abstract: A rotary distributor type fuel pumping apparatus for supplying fuel to an internal combustion engine has a distributor member an enlarged portion of which is formed with a transverse bore in which is mounted a pair of pumping plungers and blind bores located in side by side relationship with the transverse bores, the blind bores are located between the transverse bore and a body which supports the distributor member for rotation. The blind bores are in communication with drillings which lie in a plane containing the axes of the transverse bore and the blind bores and which extend from the end of the distributor member. The drillings interset the transverse bore that the ends of the drillings opening into the transverse bore are sealed by the pumping plungers.

Abstract: The present invention discloses a venturi pumping arrangement which is used to pump fluids or solutions with a high efficiency. The arrangement comprises an inner pipe and an outer pipe having a passage therebetween. The inner pipe is partially located in the venturi shaped profile of the outer pipe. A chamber has an inlet through which a fluid is passed under pressure which in turn passes through the passage which produces a reduced pressure within the outer pipe which causes a second fluid to be drawn through the inner pipe into the outer pipe. The clearance of the passage is able to be varied on the arrangement to provide variable load performance.

Abstract: A flow metering device designed to variably control the discharge from a variable displacement pump by detecting changes in momentum of the flowing fluid, which are proportional to the mass flow rates. The rate of discharge from the pump is then accurately controlled to a prescribed rate without being influenced by changes in viscosity of the fluid or where cavitation, bubbling, or the like occurs in the flow.

Abstract: This invention relates to an improved portable air pump and in particular to one that utilizes a compressing rod, a cylinder and a base to pump air in the object that requires air. By pressing the compressing rod down, air will be forced to flow through a one way valve into an air duct and blow out of an air outlet. The spring will return the compressing rod to its original position because of its elastic force. A force block shall cause the cylinder to move forward so that a squeezer may squeeze a rubber fixture to eliminate an air gap so that air will not flow toward other directions but air nozzle as desired.

Abstract: The present invention pertains to a pump, in which two pistons moving in the same direction in a common cylinder bore are provided to generate the suction intake and pressure, discharge effects as well as for control. Both pistons are held by fastening members to perform a lifting movement, and one of the pistons is a control piston for performing a constant lifting movement, while the other piston is a pump piston for performing a variable lifting movement. The difference in the lifts, multiplied by the cross section of the cylinder bore, determines the delivery volume of the pump. A braking force to the oscillating piston eliminated and the velocity of discharge of the medium to be delivered is increased by providing a member 8, whose longitudinal extension between fastening members of the two pump pistons is variable during one pump cycle so as to generate the difference between the heights of lift of the two pistons that are rigidly connected to said fastening members.

Abstract: A jet pump structure for a fuel tank having first and second chambers therein includes first, second and third fuel pipes all of which are connected to a vacuum chamber provided within the fuel tank. The first pipe returns oversupplied fuel into the vacuum chamber, the second pipe transfers fuel stored in the first chamber into the vacuum chamber, and the third pipe receives the fuel from the first and second pipes. A silencer unit is connected to the third pipe for receiving the fuel from the third pipe and discharging the fuel into the second chamber. A flow guide member is provided within the first pipe receives the oversupplied fuel and forms same a swirl flow. The swirl flow is ejected from the first pipe to provide a vacuum the vacuum chamber.

Abstract: A valveless, positive displacement pump including a living hinge for angularly adjusting a pumping head with respect to a rotatable drive member is provided. The pump includes a block to which a pumping head and drive member are mounted. The block includes a first support pivotably connected to a second support by means of an integral, flexible hinge. The pumping head is mounted to the first support while the rotatable drive member is mounted to the second support. Movement of the first support about the flexible hinge allows the stroke of the piston, and therefore the flow rate of the pump, to be adjusted. Such a pump may be manufactured by extruding the block in elongate form and then cutting it into individual sections to which pumping heads may be mounted.

Abstract: A valveless, positive displacement metering pump is provided which is capable of either mixing two or more fluids or dividing a fluid from an inflow line into two or more outflow lines. The pump includes a housing which contains a cylindrical working chamber at different radial positions. Three or more passages extend through the housing and communicate with the working chamber. A piston is positioned within the working chamber. The piston includes a duct defined by its outer surface which communicates with one of the passages, depending upon its rotational position. The piston is rotated as it is driven back and forth within the cylinder, thereby causing the duct to sequentially communicate with the passages and the piston to sequentially close the passages. Depending upon the axial direction of movement of the piston, fluid is either pumped into or out of the working chamber as the duct rotates into communication with one of the passages.

Abstract: A rotary pump for pumping fuel for internal combustion engines in the form of a vane pump or gear and rotor pump with pumping chambers disposed circumferentially around the rotor. The chambers progressively increase in the inlet area of the pump to draw in fuel and progressively ensmall at the outlet area to discharge fuel under pressure to supply an engine. The pulsations initiated in the pump are absorbed in the pump by a closed chamber exposed to the pump outlet flow, the chamber having flexible walls and an internal pressure above atmospheric to reduce pulses in the outlet and resulting pump noise. The chamber is blow molded with an enclosed volume surrounded by flexible walls.

Abstract: A valve control system for an air displacement type pump operates the inlet or outlet valve in accordance with the pressure differential between the inlet line and the main pump chamber or the outlet line and the main pump chamber respectively such that the inlet valve is open when the pressure in the pump chamber is less than the pressure in the inlet line and the outlet valve is opened when the pressure in the chamber is greater than the pressure in the outlet line.

Abstract: There is provided a method and apparatus for removing liquid from a well using well bore pressurized gas. A U-shaped tube having a small orifice near the bottom thereof is received in the well. The upper portions of both legs of the tube are connected to well bore pressurized gas. A liquid sensor is received in one leg of the tube. When liquid flowing into the tube through the orifice rises to the level of the sensor, a valve, which is connected to one leg of the tube, is opened and the well head pressurized gas forces the liquid out of the tube and then out of the well.

Abstract: An air pump for inflating an inflatable article includes a multi-stage centrifugal compressing section for inhaling and compressing primary air and a secondary air inhaling mechanism provided downstream of the multi-stage centrifugal compressing section. At the beginning of the inflation operation, extra secondary air can be rapidly inhaled into the air pump and delivered into the inflatable article mainly by means of the secondary air inhaling mechanism and thereafter, when the inner pressure of the inflatable article gradually increases to exceed the predetermined level, the secondary air inhaling mechanism may be closed so that only the multi-stage centrifugal compressing section for primary air functions to continue the subsequent inflation operation in a higher pressure range. Thus, an ideal and speedy inflation operation may be achieved without reducing the inflation pressure.

Abstract: The present invention is an expander band for use in hydraulic pumps, motors, and hydrostatic transmissions. The band has a plurality of elongated slots located circumferentially which receive slippers attached to pistons. One reduced dimension slot fixes the position of a slipper relative to the expander band while the other slippers move within the elongated slots. The fixed slipper limits the range of movement of the other slippers relative to the band, and thus the slippers avoid abutting the side ends of the elongated slots.