Patents Represented by Attorney Dowell & Dowell, P.C.

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  • Loudspeaker system
    Patent number: 6095279
    Abstract: A loudspeaker system including at least one enclosure incorporating a wave guide having a curved input slot through which sound waves generated from an acoustic transducer are introduced by way of an acoustic chamber and wherein the curvature of the slot and the orientation of opposite side walls of the enclosure are such that sound ways propagated within the wave guide exit the wave guide in a geometric configuration of a segment of a torus and so that sound waves from side-by-side enclosures form a common non-interfering wavefront.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: August 1, 2000
    Inventor: Alan Brock Adamson
  • Transducer diaphragm with thermal strain relief
    Patent number: 6097830
    Abstract: An acoustic transducer including a diaphragm having an electrical conductor applied thereto such that at least one segment of the conductor is selectively separable from the diaphragm in response to electric power being applied to the conductor to thereby provide thermal stress relief to the diaphragm during use.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: August 1, 2000
    Assignee: Sonigistix Corporation
    Inventors: Thomas Richard Zelinka, F. Bruce Thigpen
  • Sheet metal anchor nail fastener with locking staple
    Patent number: 6095737
    Abstract: An anchor nail for use with gypsum and other cementitious or composite materials used in roofing which includes a tapered tubular shank having openings therein through which ends of an insert wire staple are deflected to provide an anchoring for the nail within the material and wherein the legs of the staple are formed so as to prevent fastener withdrawal.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: August 1, 2000
    Assignee: ES Products
    Inventors: John Rhodes Barker, Raymond Morrow
  • Process and apparatus for mounting a funicular element in a jacquard electrical shed forming device
    Patent number: 6092564
    Abstract: A process for mounting a funicular element in a shed forming device of a weaving loom of a Jacquard type wherein at least one end of the funicular element is fixed on a pulley adapted to receive the funicular element and which pulley is driven in rotation by an electrical rotary actuator. A device is provided for removably connecting the funicular element to the actuator.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: July 25, 2000
    Inventors: Pierre Bourgeaux, Jean-Paul Froment
  • Partially stroking an emergency valve
    Patent number: 6089269
    Abstract: An emergency valve controlled by an electrical signal on a control line which includes a partial stroke controller connected to the control line and providing a control signal for a predetermined time to cause the emergency valve to partially stoke.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: July 18, 2000
    Assignee: Drallim Industries Ltd.
    Inventor: Derek Mark Essam
  • Compact disc case and shelving unit therefore
    Patent number: 6082836
    Abstract: A compact disc case of the type that is in general use, having a lid hinged to its tray, as well as cab storage unit therefore. The compact disc case has a gripper strip located rearwardly of the hinge axis; and a resilient latch for unlocking the lid from the tray. There is also a resilient members which urges the lid to an open position and moves the lid to the open position upon release of the resilient latch. The compact disc casing cabinet works in combination with the compact disc case. The compact disc casing cabinet also has a releasable latch such that when the releasable latch is released the compact disc casing is moved forwardly by a resilient element with respect to the slot to permit opening of the casing without its removal from the slot.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: July 4, 2000
    Assignee: Discarmour Industriale Limited
    Inventors: Stephen Welsford Marshall, Jean Christophe Charlier, Pierre Tardif, Paul Leonidis
  • Steering blocking mechanism for child's toy
    Patent number: 6082754
    Abstract: A steering mechanism for a child's toy provided with a steering member linked to at least one steering wheel, a shaft traversed by a steering rod, a fork being linked to the steering wheel and positioned on one and the other side of the steering wheel, characterized by being provided with a mechanism for blocking rotation of the fork with respect to the shaft, in such a manner that the wheel is kept in a position essentially parallel to a main axis of the toy.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: July 4, 2000
    Assignee: Etablissements Maurice Charton
    Inventors: Christian Jeunet, Philippe Prost Petit Jean, Gilbert Pauly
  • Device for rendering at least one jet of water luminous
    Patent number: 6076741
    Abstract: A device for forming and rendering luminous a jet of water projected from the device. An optical lens element is provided through which water is directed before being formed into a jet. The lens element also functions to receive light from light emitting elements which are mounted about an upstream water conductor such that the light is focused on the jet of water.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: June 20, 2000
    Inventors: Fran.cedilla.ois Paul Dandrel, Genevieve Marie nee Duveau Dandrel
  • Puzzle constituted by a plurality of pieces to be assembled
    Patent number: 6073929
    Abstract: A puzzle consisting of several pieces to be assembled to form a structure of predetermined shape or aspect, each piece including at least one tongue or a cut-out into which is to be fitted a tongue of an adjacent piece. Each tongue or cut-out is chamfered with respect to the surface of the piece along a periphery of the tongue or cut-out, and wherein each tongue or cut-out is provided with a counter-chamfer extending along at least a portion of the chamfer of the tongue or cut-out.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: June 13, 2000
    Inventor: Jean-Charles Nahon
  • Magnetically driven agitator with magnetic rotation detector
    Patent number: 6065865
    Abstract: A magnetically driven agitator for a mixture contained in a recipient which agitator is supported by a collar hermetically mounted in a wall of the recipient and which collar is provided with a blind sleeve inside which is housed a drive shaft provided with a first magnetic coupling. A propelling screw is disposed around the blind sleeve and is provided with a second magnetic coupling adapted to cooperative with the first magnetic coupling for driving the propelling screw about an axis of rotation. A third magnetic element carried by the propelling screw is disposed opposite a cell for detecting the movement of the third coupling element during rotation of the propelling screw about the axis of rotation.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: May 23, 2000
    Assignee: Mixel
    Inventors: Philippe Eyraud, Guy Flavien
  • Measuring instrument for the thermal and/or reactive properties of one or several material samples
    Patent number: 6062727
    Abstract: A measuring instrument for the thermal and/or reactive properties of one or several samples of a solid, liquid or gaseous substance, comprising a measuring cell constituted by an electronic component suitable to detect a temperature difference between two regions on it's surface. The instrument includes a thermal inertia block defining an inner chamber in which is contained the measuring cell and which block is provided with an opening above the measuring cell and a skirt surrounding the chamber. The skirt extends vertically downwardly to an essentially horizontal bearing surface.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: May 16, 2000
    Assignee: Setaram - Societe d'Etudes d'Automatisation de Regulation et d'Appareils de Mesures
    Inventors: Pierre le Parlouer, Jean-Louis Daudon
  • Centrifuge having force responsive locking device for securing a rotor to a drive head
    Patent number: 6063018
    Abstract: A centrifuge including a drive head attached to a rotation shaft and a rotor adapted to be removably mounted on the drive head in a rotational driving position and which is coupled thereto during rotation of the drive head. The centrifuge includes elements for axially locking the rotor to the drive head by applying to the rotor an axial retaining force that increases with the rotational speed of the drive head.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: May 16, 2000
    Assignee: Jouan
    Inventor: Jean Claude Letourneur
  • Method and device for transfer of mass
    Patent number: 6062546
    Abstract: A method and apparatus for the transfer of mass with the aid of rotating surfaces. The fluid with which an exchange or transfer is to be made is introduced in parallel in one or more gaps or channels defined between the rotating surfaces. Rotation of the surfaces causes the major part of the fluid flow to pass through a rotating, flow mechanical boundary layer adjacent the rotating transfer surface in laminar or turbulent flow.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: May 16, 2000
    Inventor: Bjorn Gudmundsson
  • Distributor for the filling of intratubular heat exchangers of cooling installations with a two-phase type refrigerant
    Patent number: 6059026
    Abstract: The distributor is constituted by a simple metal sheet (17) shaped as a spherical calotte that is provided with holes (17b) at its periphery and which is plane at the center. This plane element is preferably delimited by a conical body (17a).
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: May 9, 2000
    Inventors: Andre Bailly, Romuald Jurkowski, Mohamed Idriss, Marc Altazin, Slimane Meziani, Jean-Michel Navarro
  • Flower pot
    Patent number: D424472
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: May 9, 2000
    Assignee: Grosfillex Sarl
    Inventor: Raymond Grosfillex
  • Shelving unit
    Patent number: D425732
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: May 30, 2000
    Assignee: Grosfillex Sarl
    Inventor: Raymond Grosfillex
  • Flower pot
    Patent number: D426490
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: June 13, 2000
    Assignee: Grosfillex Sarl
    Inventor: Raymond Grosfillex
  • Air admittance valve
    Patent number: D427286
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: June 27, 2000
    Inventor: Julius Ballanco
  • Flower pot
    Patent number: D428358
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: July 18, 2000
    Assignee: Grosfillex Sarl
    Inventor: Raymond Grosfillex
  • Flower pot
    Patent number: D428829
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: August 1, 2000
    Assignee: Grosfillex Sarl
    Inventor: Raymond Grosfillex