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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7856718 | Method of manufacturing a screen cylinder and a screen cylinder The present invention relates to a method of manufacturing a screen cylinder, and a screen cylinder that is particularly suitable for screening, filtering, fractionating, or sorting cellulose pulp suspensions of the pulp and paper making industry, or other similar s... | 12/28/2010 |
| 7121081 | Exhaust gas recirculation afterburner An embodiment of the invention includes an exhaust gas recirculation (EGR) valve, an intake pipe, and an afterburner. As the intake valve communicates an exhaust gas stream to an EGR valve, an afterburner affixed to an inside wall of the intake pipe captures and bur... | 10/17/2006 |
| 7069657 | Method to reduce the width of a slot in a pipe or tube A method for reducing the width of slots spaced about the surface of a pipe or tube. The method comprises subjecting the surface of the pipe or tube to bombardment by a quantity of shot of a pre-determined size and for a pre-determined length of time to cause deform... | 07/04/2006 |
| 6978900 | Braided strainer for a draw line A braided strainer for a draw line, and method of forming same. The strainer comprises a frame in the form of a pair of spaced planar plates, one being a solid end plate and the other having a control aperture. A plurality of spaced, parallel rods of similar length ... | 12/27/2005 |
| 6941652 | Methods of fabricating a thin-wall expandable well screen assembly An expandable well screen has a desirable thin-wall construction together with a simplified fabrication method. In fabricating the screen, a flexible sheet of metal mesh filter media is diffusion bonded to an inner side of a perforated metal sheet which is then defo... | 09/13/2005 |
| 6836963 | Process for production of conical filter elements A process for production of conical filter elements, in particular slotted tube filter elements, includes forming a support structure of a plurality of support rods around which is wound at least one wire profile in individual turns. Slots are left clear in the wire... | 01/04/2005 |
| 6745469 | Method of making screen media and a screening passage therefore A screen media (200) for use in screening pulp slurry has a first side (204) and a second side (206). The pulp slurry is fed from the first side of the screen media to the second side of said screen media through a plurality of screening passage... | 06/08/2004 |
| 5938925 | Progressive gap sand control screen and process for manufacturing the same A progressive gap sand control screen comprising a plurality of parallel ribs spaced around an axis and a screen wire wrapped around the plurality of ribs having turns which extend along the length of the plurality of ribs such that adjacent turns have ga... | 08/17/1999 |
| 5833853 | Radial-flow filter and method of manufacture A method of manufacture of a radial-flow filter particularly suitable for use as an input filter in a subterranean fluid (oil, gas, water) well starts with a length L of multi-perforate pipe, which may be an integral part of the production tubing of the w... | 11/10/1998 |
| 5792353 | Helical filter candle including evenly spaced turns and compressed ends and method of its manufacture In order to avoid dead spaces which are difficult to subject to backflushing and in which particles can be deposited, a special helical filter candle, a method of manufacture of said helical filter candle as well as an end portion (11) for a helical filte... | 08/11/1998 |
| 5711879 | Radial-flow filter and method of manufacture A method of manufacture of a long radial-flow filter particularly suitable for use as an input filter in a subterranean fluid (oil, gas, water) well starts with a length of multi-perforate pipe, which may be an integral part of the well 's production tubi... | 01/27/1998 |
| 5650067 | Supporting plate for a filter A supporting plate is described for a filter in a fluid filter device, said filter being essentially perpendicular to the flowing direction of the fluid, said supporting plate containing a large number of holes which pass from the front side of the plate ... | 07/22/1997 |
| 5622625 | Method of manufacturing a drum A rotary drum type device for separating solid particles from a liquid includes a rotary screen drum having support rods extending in the axial direction and arranged cylindrically and having a projecting portion in a radially outward end portion, and a w... | 04/22/1997 |
| 5307984 | Method of manufacturing a selective isolation screen A method of manufacturing a selective isolation screen includes steps of fitting a plurality of screen jackets one by one on a base member, each of the screen jackets including a plurality of spacer members extending in the longitudinal direction to be di... | 05/03/1994 |
| 5273652 | Orifice restriction shielding device An orifice shield for preventing blockage of an orifice restriction by large particulate matter relative to the size of an orifice restriction in a fluid power control circuit. The orifice sheild incorporates a unitary body provided with a wire coil wound... | 12/28/1993 |
| 5255791 | End rim of cylindrical sieve for paper pulp strainer and classifier and process, of making it Process of making and mounting an end rim of a cylindrical sieve (1) for paper pulp strainer and classifier characterized by the fact that the rim is of one piece, molded directly on the end of the cylinder with a hardenable or thermosetting plastic mater... | 10/26/1993 |
| 5246158 | Method of manufacturing a selective isolation screen A method of manufacturing a selective isolation screen includes steps of preparing for a tubular screen provided with spacer members and a wire on a base member, and supplying sealing material from a sealing material supply device which supplies sealing m... | 09/21/1993 |
| 5152892 | Spiral filter element A filter element generally indicated at 10 comprising a spring 11 whose coils are so formed that the filter gaps 12 progressively increase in size from one end 13 of the coil to the other end 14. The increase in the size of the gaps is carefully chosen so... | 10/06/1992 |
| 5059320 | Locking structure of wire rod for filter element A locking structure of a wire rod for a filter element which comprises a support member of either a cylindrical, flat plate or inverted conical shape, a threaded groove helically formed on an outer or inner peripheral surface of the support member, along ... | 10/22/1991 |
| 5011023 | Conical element for filtering and separation A conical element for filerting various substance and separating particles wherein a wire is wound in the form of a helix to form a helical slit between the adjoining peripheral margins of the wire thereby producing a linear treatment opening and increasi... | 04/30/1991 |
| 4914514 | Method and apparatus for gauging well screens A method and apparatus for gauging the separation of successive turns of a wire helically wound on a fluid pervious, cylindrical body to form a wire screen for a subterranean well comprising the scanning of two adjacent wire turns after they are formed on... | 04/03/1990 |
| 4818403 | Double cylinder screen A double cylinder screen comprises an inner reinforcing cylinder which performs a pressure-resisting function against an external pressure and an outer screen cylinder which performs a screen function. The inner reinforcing screen comprises inner rods dis... | 04/04/1989 |
| 4742872 | Helically wrapped wire screen assembly and fitting therefor The invention relates to a novel tubular fitting member formed of a deformable material, such as steel, which may be combined with a helically wrapped wire screen to produce a mechanical seal of a gap formed adjacent the cut-off end portion of the screen ... | 05/10/1988 |
| 4494603 | Wire mesh well screen with welded wire support Improved well screen has its open area defined by a helically wrapped strip of wire mesh which is supported by a rigid cage-like structure of welded steel longitudinal support rods and helical wrap wires. The design is cost competitive with the simple, an... | 01/22/1985 |
| 4428423 | Well screen end fitting assembly and method of making same End fitting assembly for a spiral wire wound well screen includes a fitting portion which is internally threaded at one end to threadedly engage with a plurality of external wire wraps of the well screen which are wound around a plurality of longitudinal ... | 01/31/1984 |
| 4415396 | Apparatus for making filament reinforced plastic screen Filament reinforced cylindrical plastic screens having open slots defined by their surface wires which are of substantially different widths can be produced on a single helically finned mandrel. The slot widths are varied in accordance with the amount of ... | 11/15/1983 |
| 4406326 | Plastic well screen and method of forming same Economical plastic well screens having good hydraulic performance can be produced by the method of the present invention wherein a sheet having a large plurality of V-shaped slots is injection molded, is roll-formed into a cylindrical shape, and then has ... | 09/27/1983 |
| 4317023 | Method of making slotted well screen Plastic well screen has tapered, undercut slots formed by a laser beam focused through a lens having its focal point located at or slightly away from the surface of the plastic cylinder being slotted so that the laser beam diverges as it passes through th... | 02/23/1982 |
| 4314129 | Method and apparatus for making well screen A rod-based well screen is formed in place on a perforated pipe base by wrapping wire around the pipe base and a plurality of rods located around the outside of the pipe. The wire is welded sequentially to each individual rod as it is wrapped around the p... | 02/02/1982 |
| 4249292 | Method of assembling self-cleaning helical spring filter Methods for cleaning sand from a helical spring sand filter, methods for assembling a self-cleaning helical spring sand filter, and a self-cleaning helical spring sand filter for use at the petroliferous unconsolidated sand strata of an oil well are discl... | 02/10/1981 |
| 4227576 | Method for cleaning a helical spring sand screen Methods for cleaning sand from a helical spring sand screen for use at the petroliferous unconsolidated sand strata of an oil well are the basic steps: (1) ceasing flow from the production tube, (2) injecting high pressure liquid into a reciprocal valve m... | 10/14/1980 |
| 4201266 | Rotatable washer self-cleaning helical spring screen and methods A method for cleaning a helical spring screen that has become clogged up while filtering liquid deep in a well and while simultaneously producing filtered liquid from the well comprises (1) positioning a cleaning washer with a large opening therein betwee... | 05/06/1980 |
| 4200218 | Method of attaching fittings to a cylindrical well screen Improved method of attaching sleeve-like fittings to a wrapped wire well screen by welding is faster and stronger than prior methods, provides better mechanical sealing, and eliminates changes in the width of the screen slots. The fitting is axially slott... | 04/29/1980 |
| 4200150 | Methods and hydraulically expandable self-cleaning sand screens A method for cleaning a helical spring screen deep in a well while filtering liquid comprises (1) injecting a high pressure hydraulic surge pulse into the spring screen for expanding the coils, (2) forcing high pressure liquid between the coils of the hel... | 04/29/1980 |
| 4066202 | Method for making tubular welded wire screens A method for making cylindrical welded wire screens by continuously bending a wire into a helical wrap with juxtaposed equal wraps having their diameter substantially equal to the desired finished diameter of the screen whereby the radius of curvature app... | 01/03/1978 |
| 3973311 | Method of forming high load self-cleaning helical spring filters A method of manufacturing self-cleaning spring filters and at least two different spring filters are disclosed. One filter formed by the method comprises a helically grooved hollow mandrel with holes in the grooves and a helical spring closely fitted ther... | 08/10/1976 |
| 3958634 | Welded wire well screen on perforated casing Deep well screen and method of making same wherein a wire screen sleeve having longitudinal wires arranged in a generally cylindrical shape, with external wrapping wire welded thereto, is positioned over a perforated pipe having an external diameter subst... | 05/25/1976 |
