Abstract: An improved quick-change fluid section for piston-type paint pumps having a mounting flange with keyhole shaped apertures at one end and a threaded fitting at the other end to couple a fluid section housing to driving means via a slide housing. The piston and slide are retained in reciprocable driving relationship via a transverse pin held in place by a circumferential spring received in a circumferential groove on the slide. The spring and pin are accessible via diametrically opposed apertures in the mounting flange. The fluid section housing is bifurcated and has sealing means which may be either a packing set of alternating elastomeric and leather V-rings or lip-type seals. The sealing means is immediately available upon separation of the two portions of the fluid section and may be removed without the need for special tools. An inline or right angle inlet or suction fitting may be utilized with the fluid section.

Abstract: A plurality of inflation devices are linked to one another to form a loop that is movably restrained so that a segment of the loop is disposed at a lower reference location at the given depth in a first body of water, another segment of the loop is disposed at an upper reference location situated above the lower reference location, another segment of the loop extends along a first path that extends generally upward from the lower reference location to the upper reference location, and another segment of the loop extends along a second path that extends generally parallel to the first path and upward from the lower reference location to the upper reference location. At least a majority of the inflation devices occupying the first path are inflated with gas and at least a majority of the inflation devices occupying the second path are deflated so that inflation devices in the first path move upward and inflation devices in the second path move downward.

Abstract: Self contained evacuation lid adapted for containers allowing the contents of the container (30) to be stored under a reduced pressure atmosphere after the container (30) has been opened. The evacuation lid forms a closure over the container (30) which incorporates a bellows pump (12) for removing air from container (30). The evacuation lid also includes a air intake valve (14) for venting the container (30) to facilitate the removal of the lid.

Abstract: Hydraulic piston pump driven in an alternating reciprocating motion by bearing, through a stud, against a cam carried by a drive shaft, characterized by the fact that a device acting as non-return feed valve is incorporated in each piston (14) while the discharge pressure is permanently re-injected into the interior of the stud (17) by which said stud (17) takes support on said cam (6).

Abstract: The combined shock absorbing seat post and air pump assembly is for use on a bicycle or the like. The assembly comprises two hollow tubes inserted one into the other defining a compression chamber from which the compressed air may be sent to an inflatable device such as a tire. A shock absorbing mechanism is further provided for attenuating jarring conditions while operating the bicycle on a rough surface. The shock absorbing mechanism comprises an helicoidal compression spring in which the tension can be adjusted by hand upon rotation of a screwed element. The assembly provides a very practical and very compact assembly that combines the advantages of an air pump in the seat post and the advantages of an easily adjustable shock absorber mounted on the seat post.

Abstract: The present invention presents an improved pump piston for pressurizing liquid dispensing containers, and more particularly improved air inlet valve designs for such pistons. According to the present invention, the inlet valves are located remotely from the lower end of the pump piston, such that they are protected from contamination by liquid product and resulting degradation of performance. One inlet valve design utilizes a lost motion connection between the pump piston and upper cap, with structural elements of the upper cap and piston cooperating to form an inlet valve that is opened to admit air into the interior of the piston when the cap is pulled upward and tightly sealed when the cap is pushed downward. Another inlet valve design utilizes slits in the wall of the piston itself and the flexibility of the piston material to form an inlet valve that is opened to admit air into the interior of the piston when the cap is pulled upward and tightly sealed when the cap is pushed downward.

Abstract: The pump comprises a cylinder delimiting a pumping chamber in which a piston is mounted to slide between an admission orifice and a delivery orifice, the piston including a pumping orifice which is associated with a closure member mounted to pivot about an axis adjacent to the pumping orifice and including a closure face that is substantially plane and that faces the piston.

Abstract: A disposable plastic pump for dispensing liquids is disclosed which comprises two basic unitary, preferably all plastic, elements: a chamber forming body having an open outer end and an inner end in fluid communication with a liquid reservoir, and a piston formed to slidably fit into the chamber. The chamber forms two axially adjacent coaxial chambers, an inner chamber of one diameter and an outer chamber of a greater diameter. The piston comprises a stem on which is located two spaced flexing disc each sized to fit in and serving as a one-way valve in the inner chamber and outer chamber, respectively, permitting fluids to flow outwardly past each flexing disc. A sealing disc is located on the stem outwardly of the outermost flexing disc. A passageway is provided from an inlet on the piston between the outermost flexing disc and the sealing disc through which the dispensed liquid flow.

Abstract: A precompression pump is disclosed with a sliding inlet valve seal. In a first embodiment, the valve seal has sealing and retention surfaces which interact with sealing and retention surfaces on a bead on the inner wall of the pump chamber, to seal the pump inlet and retain the inlet seal respectively. In a second embodiment, the seal has friction tabs which engage the outer wall of the pump chamber. On the upstroke of the piston, these tabs engage a bead on the inner wall of the pump chamber, causing the tabs to rotate about a hinge, increasing the outer diameter of the seal. The result is improved frictional engagement of the seal with the inner wall, resulting in improved retention of the seal.

Abstract: The invention is a device which can be screwed into the rod string near or at the downhole pump for the purpose of shaking the pump with each stroke of the sucker rod in order to free a stuck or obstructed ball valve located in the pump. The device is formed from three metal parts, two of which fit together forming a compartment having a ceiling and a floor. The floor is formed by sides of the square opening which communicates between the compartment and the well. The metal parts forming the compartment attach to the rod string leading to the wellhead. The third part comprising the device is a piston having a cylinder head which is movably confined within the compartment and having a square neck which extends through the square opening and attaches to either the pump or a sucker rod located near the pump.

Abstract: A disposable plastic pump for dispensing liquids is disclosed which comprises three basic unitary all plastic elements: a chamber forming body having an open outer end and an inner end in fluid communication with a liquid reservoir, a one-way valve located at the inner end of the chamber between the reservoir and the chamber permitting fluid flow only from the reservoir into the chamber, and a piston formed to slidably fit into the chamber. The piston comprises a stem on which is located an inwardly located flexing element serving as a one-way valve to permit fluid flow outwardly past the flexing element and a sealing element located outwardly of the flexing element. A channel is provided from an inlet on the piston between the flexing element and the sealing element through which the dispensed liquid flows.

Abstract: A continuously cycling, low pressure, low head pump utilized for supplying periodic surges of water across an algal turf closely associated with the surface of a body of water, this pump comprising a generally vertically disposed cylinder whose lower end resides below the surface of the body of water and whose upper end is disposed above the surface of the body of water and slightly above the algal turf. An opening is provided adjacent the top of the cylinder, through which water, on occasion, can flow onto the algal turf, and a lightweight, buoyant piston is operatively disposed in the cylinder. A power applying device is utilized for forcing the piston downwardly, such that it moves from a partially submerged, floating position adjacent the upper end of the cylinder, to the lower end of the cylinder.

Abstract: A universal plunger for oil well pumps, which universal plunger includes a symmetrical plunger body having a longitudinal bore, a pair of threaded flange nipples projecting from end flanges located on each end of the plunger body, a pair of spaced O-ring seats provided inwardly of the end flanges, respectively, the O-rings seated in the O-ring seats, a plunger body segment of reduced diameter extending between the inner sets of O-rings and a "Teflon"-hydrocarbon composition disposed between the spaced inside O-rings, the plunger body segment and that portion of the inside surface of the oil well pump barrel which faces the plunger body segment, for sealing and lubricating the universal plunger in the pump barrel.

Abstract: An implantable blood pump comprises a flow passage (13) and two valves (15, 16), located spaced apart in the longitudinal direction of said passage (13) and permitting a flow of blood therethrough only in one direction and defining a pump chamber (14) therebetween, having an elastically deformable peripheral wall (17). The valve located at the inlet end of the pump chamber (14) being supported by a holder (19), arranged for reciprocating movement in the longitudinal direction of the pump chamber (14) by means of periodically operating driving means (24, 25). In order to reduce the risk of thrombosis within the pump chamber (14), said wall is formed by an elastically extensible hose (17), surrounded by a bellows (27), defining a liquid-filled annular space (29) around said hose (17) and being sealingly connected thereto at opposite ends thereof.

Abstract: A method of hardening a sucker rod well pump has a step of forming a boronized case on the plunger. Then the plunger is heated and quenched to form a hardened steel supporting layer. A chromium case is formed on the barrel.

Abstract: A stress and torque reducing tool particularly useful in production of petroleum fluids from oil wells employing a reciprocating pump located within the well bore in the reservoir which is operated by means of sucker rods attached to a surface walking beam pump operating unit. The tool is deployed intermediate the sucker rod string and the plunger rod of the downhole reciprocating pump and provides a means for hydraulically dissipating shock forces encountered in the operation of the subsurface reciprocating pump occurring from fluid pound, gas pound and/or deliberately bottoming the plunger rod to avoid gas lock.

Abstract: A hydraulic single piston pump for manual operation has a piston (3) with a first channel (14, 20) running from piston chamber (7) to the rod chamber (5). The first channel has a check valve (15-19) opening in the return stroke. The piston (3) also has at least one second channel (22, 23, 25) running from the piston chamber (7) to the rod chamber (5). The second channel is configured as a choke bore (23, 25) along at least a part of its length.

Abstract: The present invention relates to an improved connector assembly which is made of one-piece design and construction with two sections that can move relative to each other to thereby provide a connector assembly which can pivotally connect the adjoining end portions of an upper and lower string of sucker rods that are angularly disposed relative to one another within a tubing string of like angulation. Through use of the present invention one-piece connector assembly, the string of sucker rods can be inserted through various dog-leg sections in the well bore hole and further are able to absorb longitudinal forces which may be exerted on the sucker rod strings thereby permitting the sucker rod strings to reciprocate without being subjected to stress from numerous frictional forces.

Abstract: This invention concerns a kind of air liquid pump particularly used for cushion shoes, combined with a pressure scale and a ball pen. It is portable and can indicate the pressure of the inflated air or liquid and can be also used as a pen.

Abstract: The sucker rod system in a deep well sucker rod pump consists of a plurality of unidirectionally reinforced composite fiber rods extending substantially parallel but not in contact with each other, the cross-sectional area of which rods is less than 1 cm.sup.2. This enables the advantageous material properties to be utilized to a high degree. The sucker rod system can be assembled on site. The individual composite fiber rods can be monitored when they are in the working position.

Abstract: A passive programmable resistance device uses a closed loop feedback for controlling resistance to rotational or translational motion of an object. One or more actual parameters, such as force or position, are measured and compared with desired parameters. The differences are used to provide a control signal which controls the resistance to the movement of the object.

Abstract: Method and apparatus by which a malfunctioning downhole pump of the reciprocatory type can be rendered operative by bumping the pump piston against structure associated with the pump barrel. The invention is carried out on a reciprocatory downhole pump of the type which is actuated by a rod string. The rod string is reciprocated by a pumpjack unit. A hydraulic jack apparatus is interposed between the hanger bar and polish rod clamp of the pumpjack bridle assembly so that the hydraulic jack can be extended to enable spacers to be removed or inserted at a location which changes the relative position of the polish rod clamp and hanger bar, and which also changes the relative position of the downhole pump piston and pump barrel.

Abstract: A reciprocating pump for delivering cutting fluid to the machining situs between a tool and a workpiece includes a collapsible piston which forms a substantial seal in the pump during the power stroke and then collapses during the relaxation stroke to allow the piston to reassume its initial position in preparation for the next power stroke. The pump includes an indexer and switch which maintain the pump in an operative condition, thereby delivering cutting fluid to the machining situs for a predetermined amount of displacement between the tool and workpiece prior to engagement and subsequent thereto. The indexer and switch exploit a predetermined amount of play in the switch to maintain the pump in an operative condition for the desired time.

Abstract: A connector assembly that may be used to so pivotally connect the adjoining end portions of an upper and lower string of sucker rod that are angularly disposed relative to one another within a tubing string of like angulation, that longitudinal forces may be exerted on the sucker rod strings to reciprocate the same without the sucker rod strings being subjected to an appreciable twisting stress. The connector assemblies may not only be used to connect angularly disposed strings of sucker rod at their junctions, but also to connect the lower end of the lowermost string of sucker rod to the piston rod of an elongate pump situated below the tubing string in which the sucker rods are disposed.

Abstract: The invention provides a high flow rate standing valve for oil wells of the type employing a plurality of check valve units disposed in parallel between inlet and outlet passages, the flow area of the inlet or outlet passage each being not in excess of the total flow areas of the individual check valves so that no significant pressure drop is produced by fluid flow through the check valves in their open position. Specifically, the invention provides an improved configuration for such standing valves permitting the convenient manufacture and assembly of the valve components. In a modification of the invention, the standing valve housing is constructed so that its lower end is mounted on and co-operates with a conventional well safety valve.

Abstract: A device for use in well pumping apparatus of the type having a bottom hole pump actuated by a vertically reciprocating operating rod, and in which the pump is of the kind in which a tendency to gas lock can be corrected by extending the downstroke of the pump plunger until this taps on the bottom pump parts. The device of this invention is capable of variably limiting the downstroke of the operating rod to allow the pump to be tapped on the downstroke or to be lifted clear of the bottom, as required. The device includes a cylinder carried by the pump bridle and arranged to be supplied with hydraulic fluid, a piston in the cylinder arranged to be lifted when fluid is pumped into the cylinder, means for holding the piston in its raised position relative to the cylinder, and means on the piston for engaging with a member fixed to the operating rod to raise and lower this relative to the pump bridle.

Abstract: A pump assembly for dispensing fluent material from within a container includes a tank and a piston defining therebetween a pump chamber and movable relative to each other to pump fluid from the container into and out of the pump chamber. A poppet interposed between the tank and the piston extends at one end thereof into the inlet conduit for the pump chamber and at the opposite end into the exhaust conduit. When the tank and piston are moving relative to each other to draw fluid from the container into the pump chamber, the end of the poppet extending to within the exhaust conduit engages against a valve seat defined in the exhaust conduit to close the exhaust conduit. The other end of the poppet extending to within the inlet conduit is frictionally engaged within the inlet conduit and the drag forces thus effected upon this end of the poppet operate to enhance the sealing effect of the opposite end of the poppet to close the exhaust conduit thereby permitting fluid to be drawn into the pump chamber.

Abstract: A specially designed valve is incorporated in the pumping tube of an oil well pump secured to the lower end of an oil well pipe string. In pumping the well, oil is drawn up through the pumping tube and oil pipe string to the surface. The check valve is arranged to be actuated from the surface of the well in response to lowering the sucker rods for operating the pump beyond the normal amplitude limits to thereby place into communication the oil in the pumping tube and pipe string with the annulus of the well between the well casing and exterior walls of the pumping tube pipe string thereby equalizing the hydrostatic pressure and permitting pulling of the well pipe for pump servicing or other operations.

Abstract: A pump assembly for an atomizing piston pump comprises a first piston slidably located in a first cylinder to define a first variable volume space and a second piston of smaller piston area than the first slidably located in a second cylinder to define a second variable volume space. The two volume spaces are in communication and there is a fluid flow passage through the first piston. A first valve is provided for opening and closing the passage and first biasing means urges the valve into a position closing the passage. Second biasing means urges the second piston towards a position corresponding to the minimum volume of the second volume space. The valve opens in the direction of fluid flow through the passage and fixed means are provided for opening the valve only after a predetermined amount of movement of the first piston.

Abstract: A cable string for replacement of a prior art sucker rod string used in pumping oil wells with a pump jack unit. The cable string is comprised of a plurality of individual joints of multi-strand material connected together by a coupling member. Each individual joint has a pin member at each extremity thereof. Each joint is affixed in series relationship to another joint by the coupling member. The coupling member has a box connection at each extremity thereof. Hence, the pin member of adjacent joints are connected together by the box connection of the coupling member to provide a string of flexible cable joints of sufficient length to extend from proximity of the pump jack downhole through the borehole into proximity of the downhole pump. When a plurality of cable joints are connected together, the resulting length thereof is equivalent to the length of a standard solid metal joint of sucker rod.

Abstract: A variable dosing piston pump having a cylinder made of two parts, the fixed part through which the piston rod extends and a part adapted to be inserted more or less within said fixed part and means to fix said parts relative to each other, an outlet in said fixed part for the dosed liquid, an inlet controlled by a non-return valve in said movable part, the piston having a diameter adapted to that of the movable part and comprising a non-return valve. By changing the positions of the two cylinder parts relative each other, and retaining the same piston movement, the effective stroke of the piston is changed, thereby changing the dosing.

Abstract: A rolling seal assembly for sealing between a well head and a pump rod reciprocating a predetermined stroke distance through an opening in the well head, the seal assembly comprising a substantially tubular, flexible seal encircling the rod adjacent to the well head, the seal having a first end sealingly connected around the rod and a second end sealingly connected to the well head around the opening, the seal rollingly extending between the first and second ends thereof as the first end reciprocates with the rod.

Abstract: Pumping in oil wells and like application is carried out in a noiseless manner with efficient utilization of energy by raising the plunger or piston in a subsurface pump piston with a long metal rod or cable capable of undergoing memory shape change as a function of a martensitic transformation when worked by application of stress, preferably by gravity through an attached weight, while cold to elongate itself and, upon application of heat thereto, reversing the transformation and contracting in length to raise the piston and associated equipment plus fluid load.

Abstract: A variable stroke compressor is disclosed that includes a casing with an upper and lower piston, the lower piston being connected to a piston rod and the upper piston being slidably received for reciprocal movement on the piston rod. Means are provided on the upper piston to control its descent towards the lower piston.