Patents by Inventor Lonnie E. Johnston

Lonnie E. Johnston has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5027489
    Abstract: A device for swaging a ferrule onto the periphery of a cylindrical member includes a first piston mounted for reciprocation within a body and an anvil member drivingly connected to the first piston. The anvil member has a recess at one end to receive an end of the cylindrical member. A camming device is associated with the anvil member for camming a ferrule carried on the end of the cylindrical member into tight peripheral engagement. A second piston is mounted for reciprocation within the body in spaced relation to the first piston. A movement of the second piston is necessary in order to move the first piston. Located between the first and second pistons are an unexpandible chamber which contains a constant amount of fluid and a spring for resiliently urging the pistons away from each other.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: July 2, 1991
    Assignee: Crawford Fitting Company
    Inventor: Lonnie E. Johnston
  • Patent number: 4995646
    Abstract: A connector assembly for permitting sealed passage of tubular lines through portions between separate chambers comprises a first fitting body having a through passage for connection to one of the chambers. The through passage has an outwardly open end with a circumferentially continuous conical mouth. A first rigid disk member with a conical outer surface is received in the conical mouth. Aligned with the first disk member is a second disk member and there are aligned openings formed through both disk members to permit the tubular lines to pass therethrough. Conical chambers are formed about the openings in the first disk member with ferrules positioned therein to closely encircle the tubular lines. A coupling acts to drive the second disk toward the first disk to drive said ferrules into the conical chambers to thereby produce sealing of the ferrules with the lines and to apply force to the first disk to produce sealing between the first disk and the conical mouth.
    Type: Grant
    Filed: November 28, 1989
    Date of Patent: February 26, 1991
    Assignee: Crawford Fitting Company
    Inventors: Lonnie E. Johnston, Peter C. Homan
  • Patent number: 4879819
    Abstract: A gauge for fittings of the type including a coupling nut having a threaded internal opening and adapted to encircle a cylindrical member and a ferrule positioned on the cylindrical member, the gauge being used for determining the pull up of the ferrule and the swaging of the cylindrical member, includes an indicating unit having a readout for showing whether the swaging of the cylindrical member is within tolerances. A piston is movably mounted on the indicating unit and is operatively connected to the readout. The piston includes a body having a bore and an external threaded area on the body circumferentially of the bore to threadedly engage the threaded internal opening of the coupling nut carried on the cylindrical member. The piston further includes a section within the bore for aligning the cylindrical member with the bore and for limiting the extent of movement of the cylindrical member into the bore. A master is provided for calibrating the gauge.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: November 14, 1989
    Assignee: Crawford Fitting Company
    Inventors: Lonnie E. Johnston, Steven J. Volcansek
  • Patent number: 4873755
    Abstract: A device for swaging a ferrule onto the periphery of a cylindrical member includes a piston mounted for reciprocation within a body and an anvil member drivingly connected to the piston and having a recess in one end to receive the end of the cylindrical member. A camming body is associated with the anvil member for camming a ferrule carried on the end of the cylindrical member into tight peripheral engagement therewith. A gauge device is associated with the camming body for measuring the movement of the camming body relative to the body housing the piston. The camming device includes an articulated signal member having a first arm and a second arm one end of which is secured to the end of the first arm. The second arm is selectively pivotable about the first arm and a resilient spring is used to urge the second arm to one end position in relation to the first arm. A biasing member is used for moving the signal member from a first to a second position.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: October 17, 1989
    Assignee: Crawford Fitting Company
    Inventor: Lonnie E. Johnston
  • Patent number: 4781086
    Abstract: An adjustable wrench particularly useful to facilitate ease of installation and removal of fluid fittings in and from a fluid system. The wrench includes an elongated handle threadedly cooperating with a body member. The body member has a pair of opposed clamping faces defining a clamping cavity adapted to receive an associated fitting. Relative rotation between the handle and body portion axially advances and retracts a smooth end face of the handle into and out of abutting engagement with a side wall of the fitting. A cutout region in the wrench body is adapted to receive one branch of an associated tee or cross type fluid fitting. The subject wrench readily facilitates clamping engagement of a fitting while coupling nuts are run up on or backed off of the fitting branches by conventional means.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: November 1, 1988
    Assignee: Crawford Fitting Company
    Inventor: Lonnie E. Johnston