Abstract: A pumping unit comprising a supporting post and a walking beam, having a head end and a tail end, pivotally connected to the post to allow for rocking of the beam about a horizontal pivot axis. The head end is connected to a vertical pump rod. The walking beam is also connected to one end of an arm, the opposite end of which is connected to a drive assembly for rocking of the beam about the horizontal pivot axis to reciprocate and produce a predetermined number of up and down strokes per minute of the pump rod. The drive assembly includes a rotating power device connected by sheaves and belts a transmission assembly whereby rotation of the power device is translated to a longitudinal force on the arm for rocking of the beam. The drive assembly is further characterized by a speed reducer interpositionable between the power device and the power transmission assembly to substantially reduce the number of up and down strokes per minute of the pump rod.

Abstract: A heat fusible laminate for imprinting a design on an article of stretchable fabric such as polyamide, polyester and other synthetic materials. The laminate includes a release layer, a first adhesive layer, at least one ink layer of heat fusible composition and a second adhesive layer. The laminate is responsive to heat and pressure, when placed with the second adhesive layer against the fabric article, for securing the design to the fabric and allowing removal of the release layer therefrom.

Abstract: A sewer cleaning tool for attachment to one end of a cable, the other end of which is connected to a rotary power drive. The tool has an elongated body having a forward end and a rearward end, the rearward end being removably attachable to one end of the cable. A plurality of vane members project radially from the body at uniformly spaced intervals therearound providing longitudinal outer edges and transverse forward and rearward edges. The vane members act cooperatively as a pump impeller, upon rotation of the tool, for agitation of sewer line fluids to dislodge any materials lodged therein.

Abstract: Demisting apparatus for separating oil and air from oil mist supplied thereto and including an enclosed reservoir into which the oil mist may flow; a filter device connected to the reservoir; and a blower having its suction connected to an upper portion of the reservoir for drawing oil mist therefrom and having its discharge connected to the filter device. The filter device includes a filter element through which oil mist discharged from the blower may pass for separating oil and air therein, at least some of the air venting to the atmosphere through a first portion of the filter device, the oil draining through another portion of the filter device for collection in the reservoir.

Abstract: An educational device having an enclosed housing formed of a vessel-like base and a substantially flat transparent top the edges of which sealingly engage upper edges of the base. The housing is substantially filled with liquids. A divider is carried within the housing adjacent the top. The divider comprises mutually perpendicular vertical walls defining an array of bottom opening compartments which, when viewed through the top, are arrayed in mutually perpendicular rows and columns. A plurality of buoyant ball members, having distinctive indicia thereon, are carried in the housing.

Abstract: A choke valve having a valve body in which is a valve chamber with in inlet and an outlet. A valve seat is carried in the valve chamber. A flow control member is also carried in the valve chamber for axial movement with respect to the valve seat from a closed position, preventing flow of fluids from the valve inlet to its outlet, and selected open positions which provide predetermined flow areas through which flow and pressure throttling of fluids may occur. A non-rotating stem assembly is attached to the control member for axial movement thereof. A valve bonnet is attached to the valve body and provided with a throughbore in which the stem assembly may slidingly reciprocate while positioning the flow control member. A rotating driver assembly is supported from the valve bonnet and includes a nut member threadedly engageable with another end of the stem assembly. The nut translates rotational movement of the driver assembly to axial movement of the stem assembly and the flow control member attached thereto.

Abstract: Walking apparatus for assisting a disabled person to walk. The apparatus includes a frame having a pair of lower horizontal members between which the person may stand and a vertical member extending upwardly for disposition behind the persons back. The apparatus also includes a forward pair of ground engaging wheels, each one of which is attached to a forward wheel mount which extends downwardly from a forward end of one of the lower horizontal members. The wheel mounts allow the wheels to pivot about a vertical axis. At least one rear ground engaging wheel is also attached to a rear wheel mount at the rear of the frame. A steering assembly is mounted on the frame and connected to forward wheel mounts. The steering assembly is manipulatable by the person's hands for pivoting of the forward pair of wheels about vertical axes to steer the apparatus in a desired direction.

Abstract: A self-propelled lift truck comprising a forward carriage assembly, which includes a pair of spaced apart ground engageable wheels and a vertical mast on which is mounted a forwardly projecting fork assembly for lifting and lowering of loads thereon by relative upward and downward movement and a rearward carriage assembly which includes at least one ground engageable wheel and on which is supported a power source for operating components of the lift truck. The forward and rearward carriage assemblies are connected by an articulated support assembly which includes forward, intermediate and rearward transversely spaced apart support members. The foremost ends of the forward support members are pivotally attached to the forward carriage assembly. The rearmost ends of the rearward support members are pivotally attached to the rearward carriage assembly.

Abstract: Modular light display apparatus for mounting a string of electric lights which has a plurality of light sockets and corresponding light bulbs connected at spaced intervals to electrically conducting wire. The light display apparatus comprises two or more pre-shaped modular light holders the ends of which are removably engageable with corresponding stationarily disposed objects to provide for mounting of the string of electric lights in a display of predetermined configuration. Each of the modular light holders comprises an elongated member of generally U-shaped cross-section to provide a channel in which the string of electric lights may be disposed. A plurality of uniformly spaced holders each one of which is engageable with one of the light sockets of said string of electric lights may be provided within the channel so that when viewed from at least one side of the modular light holder, the light sockets are hidden within the channel and the light bulbs project upwardly from the channel.

Abstract: A low pressure relief valve having a flow passage therethrough providing fluid communication between the interior and exterior of a vessel the interior of which is under a low positive or negative pressure. A valve port in the flow passage has a valve seat therearound and a closure member is carried in said valve body for engagement with the valve seat to block fluid communication between the interior and exterior of said vessel. The closure member is of a preselected weight and is free to disengage the valve seat in response to a predetermined increased pressure differential between the vessel interior and exterior, without being affected by any other force than gravity, to permit fluid communication through the flow passage for reducing the pressure differential.

Abstract: Apparatus for cooling and retarding an increase in the temperature of a liquid contained in a vessel. The apparatus includes a base for substantially occupying the lower interior of liquid containing vessel and a cooling body for upward projection from the base so that when the base is placed in the vessel the cooling body projects upwardly therefrom for submersion in the liquid. The cooling body comprises a sealed container substantially filled with a slow-to-freeze, slow-to-thaw gelatinous material which may be frozen prior to submersion in the liquid.

Abstract: A tennis aid for improving the stroke of a tennis player. The aid includes a wrist band for encircling the wrist of a tennis player and an associated elastic cord attached thereto. The cord is attached to the wrist band near its midpoint and at opposite ends thereof may be attached to the head of a tennis racket. When the handle of the racket is properly held by the tennis player tension in the cord will tend to prevent the player from bending or flexing the wrist during a tennis stroke.

Abstract: Water purification apparatus provides an elongate ultraviolet lamp extending into a surrounding hollow tube capable of passing ultraviolet light. The lamp and tube are surrounded by a housing, with water inlet and outlet, which provides an annular flow path around the hollow tube through which water may pass for exposure to ultraviolet light. An ultraviolet reflective surface in the annular flow path reflects ultraviolet rays through the water. A unique seal is provided around an open end of the hollow tube to seal the lamp from water in the housing.

Abstract: Apparatus and methods for flushing and cleaning the oil strainer and crankcase of an internal combustion engine of a type having a removable full-flow oil filter. The oil filter is temporarily replaced with a cartridge which has at least one passage therethrough which will communicate with the discharge side of the engine oil pump but does not communicate with the normal outflow port of the filter apparatus. A second passage therethrough may communicate with the outflow port of the filter system but does not communicate with the discharge of the oil pump. In a preferred method, the inlet of the first passage may be connected to a source of pressurized fluid to force the fluid, in a direction opposite to normal flow, through the passage, the oil pump and the oil strainer to agitate and flush contaminants in the oil strainer and crankcase. The pressurized fluid and contaminants are drained from the crankcase after which the cartridge is removed, a new oil filter installed and clean oil added to the engine.

Abstract: A self-propelled hovercraft having a body or hull around the periphery of which is a segmented skirt. The segmented skirt of the hovercraft comprises a plurality of bags, one adjacent to another, completely encircling the hovercraft body. Each of the bags has front and side portions and, in one embodiment, at least some of the bags at the forward end of the hovercraft are provided with semi-rigid lower front surfaces constructed of material less flexible than material of other bags and which may be provided with internal cushion devices which support the front semi-rigid material against water surface contact.

Abstract: A method of immobilizing or stabilizing lead paint contaminated construction or demolition debris in which the debris is shredded, mixed with water and a chemical, such as fly ash, lime, Portland cement or kiln dust. The treated debris is then collected and allowed to stand for a period of time sufficient for the lead paint to be converted from a soluble form to an insoluble form. Excess water may be drained and collected and the treated and lead paint stabilized debris disposed of.

Abstract: Apparatus for dispensing lubricant to an elongated spar track. The apparatus includes a mounting plate adapted to receive a container of lubricant from which lubricant may be dispensed to the spar track. Guide assemblies are attached to the mounting plate for engagement with the spar track and for guiding the apparatus along the spar track in response to a moving force applied thereto.

Abstract: A threaded pipe joint including an externally threaded male section and an internally threaded female section having mutually engageable threads the corresponding roots and crests of which define a helical path through which fluids from said pipe section may leak. The threaded area of one of the pipe sections is provided with a radially disposed blind recess in which is placed a seal plug of extrudable generally nonresilient material.

Abstract: Hanger apparatus for suspending coiled tubing and equipment in a well including a tubing head having a vertical flow passage therethrough. A hanger assembly is carried in an inverted frusto-conical recess of the flow passage. The hanger assembly includes segmented slip and seal members moveable between outwardly expanded passive positions in which the slip and seal members do not interfere with full bore flow passage and inwardly contracted active positions in which gripping surfaces carried on slip members engage the coiled tubing to support the weight thereof, the weight of the tubing being transferred from the slip members to the sealing members. Slip activators carried by the tubing head are manipulatable externally of the tubing head to move the slip members from passive positions to active positions. Methods of utilizing the apparatus to install coiled tubing and equipment in a well are disclosed.

Abstract: An improved lubricating system for continuous closed lubrication of bearings including: an oil mist generator; a distribution assembly for distributing oil mist from the oil mist generator to the bearings; a collection device for collecting excess oil and oil mist from the bearings and a return assembly through which excess oil and.Iadd./or .Iaddend.oil mist .?.are.!. .Iadd.may be .Iaddend.returned from the collection device to an oil mist collection/supply vessel for reuse.