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| Number | Title | Issue Date |
| 4796663 | Fabricated check valve construction A fabricated swing check valve where the valve body is in the form of a pair of tubular sections welded together in end-to-end relation. The valve seat and cage, with hinge pin hanger, are positioned in a counterbore in the inner end of one of the body se... | 01/10/1989 |
| 4796664 | Two-axis force motor A two-axis force motor (10) has an armature (12) mounted within a body (11) for omni-directional pivotal movement relative to the body. The motor has an electrical section for causing the armature to pivot selectively in either or both of two mutually-per... | 01/10/1989 |
| 4796665 | Multi-purpose draining valve A valve body comprises a first sealing seat and a second seat opposite the first. The valve element is selectively controlled so that, in addition to the position in which a bearing surface thereof rests on the first seat to ensure tightness of the device... | 01/10/1989 |
| 4796666 | Sanitary single-handle mixing valve The invention relates to a sanitary single-handle mixing valve having control elements composed of at least two discs, one of which serves as a fixed valve seat disc with two inlet openings for cold and hot water. For purposes of operating the mixing valv... | 01/10/1989 |
| 4796667 | Brake pressure control valve The invention relates to a brake pressure control valve which contains a brake pressure build-up valve. The brake pressure build-up valve comprises a pressure compensated seat valve. A second valve member, a rod between the two valve members and a tubular... | 01/10/1989 |
| 4796668 | Device for protecting threadings and butt-type joint bearing surfaces of metallic tubes A device for protecting, before use, threadings and butt-type joint bearing surfaces (66) which contribute to the hermetic character and to the threadings (55) of male or female joining regions of metallic tubes. It comprises a ring (56) of plastics material w... | 01/10/1989 |
| 4796669 | Product for relining sewers and water pipes A method is disclosed for relining buried pipeline with interconnectable plastic type pipe sections. The method comprises gaining acess to an open end of the buried pipeline, such as through a manhole, passing pipe sections down the manhole and inserting ... | 01/10/1989 |
| 4796670 | Drill pipe protector A drill pipe protector which surrounds and embraces a section of drill pipe. The protector includes at least an outer portion and surface made of an elastomeric material in which a quantity of small, hard particles are interspersed. During drilling operat... | 01/10/1989 |
| 4796671 | Protective tube for thermocouple and method of producing same A protective tube for a thermocouple for measuring the temperature of molten metal, comprising two layers, an inner layer being made of a silicon nitride or sialon ceramic having a bending strength of 50 kg/mm2 or more, a density of 90% or more... | 01/10/1989 |
| 4796672 | Pressure-withstanding pipe An improved pressure-withstanding pipe is made of a soft synthetic resin or rubber material with hard synthetic resin reinforcing bodies helically wound and embedded in the pipe wall at predetermined intervals. A thin reinforcing belt member is also helic... | 01/10/1989 |
| 4796673 | Reproduction process of the existing pipeline A reproduction process for an existing pipeline whether underground or overground includes the inserting of at least one rigid inner pipe having its front end temporarily blocked, and advancing the rigid inner pipe within the existing pipeline by means of... | 01/10/1989 |
| 4796674 | Shed-forming apparatus for doup weave A shed-forming apparatus for doup weaves comprises for each warp thread pair a plate adapted to be pivoted back and forth and comprising on one side of its pivoting axis a bore for the passage of the stationary warp thread and on the opposite side of its ... | 01/10/1989 |
| 4796675 | Yarn storing, feeding and measuring device A yarn storing and feeding device having a stationary storage drum onto which an intermediate yarn store is wound by a winding-on device, and from which the yarn is withdrawn through a gap around the withdrawal end of the storage drum. At least one yarn s... | 01/10/1989 |
| 4796676 | Fluid storage tank system A storage tank system for storing fluids in an environmentally safe container which includes a rigid external primary tank having a flexible protective secondary inner tank positioned within the tank and drawn, by negative pressure, into contact with the ... | 01/10/1989 |
| 4796677 | Apparatus for facilitating liquid transfer from a drum An apparatus for facilitating liquid transfer from a drum has a receptacle which has upper and lower portions. The lower portion is a generally conical member having an egress at its apex from which a first fluid coupling extends. The first fluid coupling... | 01/10/1989 |
| 4796678 | Liquid delivery apparatus An apparatus for topping off a fuel tank which is necessary for full tank delivery after false fuel level detection caused by fuel bubbles or splashes. This is made possible by making a spring biased valve sent for a main valve longitudinally movable and ... | 01/10/1989 |
| 4796679 | Apparatus for dispensing a deformable and flowable filling material A residual quantity filler is described in which a cylindrical filling tube is used in place of a filling funnel, with a lid arrangement being provided in the filling tube and with the lid arrangement moving during the dispensing step with the dispensed m... | 01/10/1989 |
| 4796680 | Apparatus for tenderizing veneer sheets Apparatus for tenderizing veneer sheets which comprises a pair of rotatable press means each having, on their surfaces, a plurality of projections having tops for pressing a veneer sheet to be tenderized. The projection tops of one of the press means and ... | 01/10/1989 |
| 4796681 | Continuously moving lathe knife A continuously moving lathe knife is provided which can be retrofit to an existing lathe carriage. The knife assembly includes a chain bar secured to the knife carriage with a pair of sprockets at either end of the chain bar. An endless loop chain extends... | 01/10/1989 |
| 4796682 | Grooving apparatus A cutting apparatus for forming a V-sectioned groove in a workpiece includes a support surface, a pair of guide rails mounted in parallel relationship with one another and in relatively low relationship with the support surface and a platform mounted upon... | 01/10/1989 |
| 4796683 | Pneumatic radial tire To prevent tire unbalanced abrasion, that is, tire unbalanced rigidity between the acute angle corners and the obtuse angle corners of blocks forming a tire tread pattern, without decreasing the tire drainage and increasing tire pattern noise, block side ... | 01/10/1989 |
| 4796684 | Compact drapery system A drapery system containing hanger glides which nest together in partial overlapping relationship when said drapery is traversed to retracted position to permit said drapery to occupy a minimum area of an adjacent window, wall or the like. The edge of the... | 01/10/1989 |
| 4796685 | Vibrating table for forming sand molds Vibrating table used particularly in founding, of the type having vibrators fastened to a horizontal plate mounted on a frame and insulated from the base of this frame by elastic damping devices has two rotary vibrators having axes defining unbalance cent... | 01/10/1989 |
| 4796686 | Centrifugal casting machine with venturi actuated vacuum venting A device affixed to a centrifugal force casting machine that developes a vacuum as it travels through the air on the spinning arm of the casting machine. The developed vacuum is used to evacuate unwanted gasses from a casting mold.... | 01/10/1989 |
| 4796687 | Liquid/solid interface monitoring during direct chill casting An apparatus and method for monitoring the liquid/solid interface position of an alloy ingot being formed by either direct chill or electromagnetically enhanced direct chill casting systems comprising an inductive sensor wire disposed about the mold wall ... | 01/10/1989 |
| 4796688 | Method for controlling the melting and casting process in precision casting, particularly for dental engineering, and arrangement for carrying out the method The variation with time of the temperature is analyzed during the heating-up of a melting charge in dental engineering. If the slope (dθ/dt) of the temperature curve changes by a predetermined measure, this is used for detecting the liquidus point. Time ... | 01/10/1989 |
| 4796689 | Mold for electromagnetic continuous casting An electromagnetic mold for vertical continuous casting of rolling slabs, featuring an inductor and an electromagnetic screen partly covering the induction is such that the vertical distance between the lower edge of the inductor and the lower edge of the... | 01/10/1989 |
| 4796690 | Support system for heat exchange tube A heat exchange apparatus in which a plurality of heat exchange tubes are disposed in a enclosure and are supported relative to two opposed upright walls of the enclosure. Each tube is formed in a serpentine manner with adjacent tube sections extending in... | 01/10/1989 |
| 4796691 | Fluidized bed heat exchange apparatus A heat exchanger comprises two fluidization chambers separately supplied with fluidization gas. A heat transfer medium in the form of particulate material is supplied to the first chamber which is in communication with the second chamber. The second chamb... | 01/10/1989 |
| 4796692 | Convector with finned tubes Convector with finned tubes [1, 2, 3, 4] for conducting a first heating medium and an upright channel [42] for a second medium around at least one of the finned tubes [1]. A lower finned tube [1], a side finned tube [2] and an upper finned tube [3] are ri... | 01/10/1989 |
| 4796693 | Finned tube with indented groove base and method of forming same A tube for heat transfer systems or the like is provided which includes helically or circumferentially disposed, radially extending ribs or fins. The base of the grooves defined between adjacent fins has a plurality of discrete impressions defined therein... | 01/10/1989 |
| 4796694 | Cooling fin for heat exchanger In order to increase the heat exchange capacity and efficiency of a cooling fin for an automotive radiator, air conditioner heat exchanger, or the like, a plurality of small triangular or similar shaped projections which produce a texture similar to that ... | 01/10/1989 |
| 4796695 | Tube supports The tubes in a tube bundle which is laid out in an alternating array of tubes and empty lanes are supported by corrugated slats positioned in the empty lanes, separating adjacent rows of tubes, the corrugations of each of the slats extending along the len... | 01/10/1989 |
| 4796696 | Device for heating or cooling infusion fluids or injectable fluids Device for heating or cooling infusion fluids or injectable fluids comprising a heat exchanger in the form of a hollow cylindrical or truncated, conical, double cased pot, open at the top; the outer wall being higher than the inner wall of the double casi... | 01/10/1989 |
| 4796697 | Slip stream device A device for continuously adding chemicals to a producing oil well to prevent the formation of paraffins, emulsions, scale and to prevent corrosion is described. The device includes an above ground mixing chamber having an inlet and an outlet. A portion o... | 01/10/1989 |
| 4796698 | Landing nipple and plug A drilling template for multiple wells has a dummy post on the template associated with each wellhead position and a wellhead connector is transferable between the dummy post and wellhead during completion and workover operations. A subsea wellhead is pro... | 01/10/1989 |
| 4796699 | Well tool control system and method In accordance with illustrative embodiments disclosed herein, a formation testing tool suspended in a well on a pipe string includes a valve actuator control system which responds to a command signal having a certain signature. The command signal is appli... | 01/10/1989 |
| 4796700 | Process for retarding fluid flow A gel-forming composition is provided comprising a first substance selected from the group consisting of a polyvinyl alcohol, a polyvinyl alcohol copolymer, and mixtures thereof, glutaraldehyde, and water, and which does not require a separately provided ... | 01/10/1989 |
| 4796701 | Pyrolytic carbon coating of media improves gravel packing and fracturing capabilities A pyrolytic carbon coated particle for use in well fracturing and sand control applications comprising: a thermally stable substantially spherical substrate particle (e.g., ceramic composite bead or the like) and a substantially uniform layer of pyrolytic... | 01/10/1989 |
| 4796702 | Multipurpose aqueous foamer The invention provides a surfactant mixture, comprising a zwitterionic surfactant, a nonionic surfactant and a cationic surfactant, which forms a foamable liquid composition upon addition to aqueous media including fresh water, brines, acids and water/alc... | 01/10/1989 |
