Patents by Inventor Harold G. Leigh

Harold G. Leigh 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: 7156815
    Abstract: Soft tissue biopsy apparatus for obtaining a tissue specimen comprises a compact handle functioning as a housing having an opening at a front end thereof through which a tubular cannula is arranged to pass. Disposed in the lumen of the cannula is a stylet having a notch formed near its distal end in which a tissue sample is to be captured. First and second springs are operatively coupled individually to the cannula and stylet and a cocking slide incorporating a force reducing mechanism is used to compress the springs while establishing the size of the specimen to be collected in the notch. A trigger mounted on the cocking slide can be used to release the compressed springs in close succession to first advance the end of the stylet beyond the end of the cannula whereby tissue to be extracted flows into the notch and then the spring driving the cannula is released forcing the cannula forward and severing the piece of tissue contained in the notch from surrounding tissue.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: January 2, 2007
    Assignee: BioMedical Resources, Inc.
    Inventors: Harold G. Leigh, Matthew D. Kneen
  • Publication number: 20040186393
    Abstract: Soft tissue biopsy apparatus for obtaining a tissue specimen comprises a compact handle functioning as a housing having an opening at a front end thereof through which a tubular cannula is arranged to pass. Disposed in the lumen of the cannula is a stylet having a notch formed near its distal end in which a tissue sample is to be captured. First and second springs are operatively coupled individually to the cannula and stylet and a cocking slide incorporating a force reducing mechanism is used to compress the springs while establishing the size of the specimen to be collected in the notch. A trigger mounted on the cocking slide can be used to release the compressed springs in close succession to first advance the end of the stylet beyond the end of the cannula whereby tissue to be extracted flows into the notch and then the spring driving the cannula is released forcing the cannula forward and severing the piece of tissue contained in the notch from surrounding tissue.
    Type: Application
    Filed: June 4, 2003
    Publication date: September 23, 2004
    Inventors: Harold G. Leigh, Matthew D. Keen
  • Patent number: 5713368
    Abstract: A biopsy device incorporating a housing, having a slide member therein, with one of a stylet or cannula connecting to the slide, while the other is fixed to the housing, such that when the slide member is shifted longitudinally within the housing, a displacement occurs between the forwardmost portions of the styler and cannula, generating a reduced pressure therein, for aspirating a biopsy for analysis.
    Type: Grant
    Filed: September 13, 1995
    Date of Patent: February 3, 1998
    Assignee: Medical Device Technologies, Inc.
    Inventor: Harold G. Leigh
  • Patent number: 5348022
    Abstract: A biopsy device incorporating a housing, having a slide member therein, with one of a stylet or cannula connecting to the slide, while the other is fixed to the housing, such that when the slide member is shifted longitudinally within the housing, a displacement occurs between the forwardmost portions of the stylet and cannula, generating a reduced pressure therein, for aspirating a biopsy for analysis.
    Type: Grant
    Filed: August 28, 1992
    Date of Patent: September 20, 1994
    Assignee: Medical Device Technologies, Inc.
    Inventors: Harold G. Leigh, James D. Taylor
  • Patent number: 5172701
    Abstract: A biopsy device incorporating a housing, having a slide member therein, with one of a stylet or cannula connecting to the slide, while the other is fixed to the housing, such that when the slide member is shifted longitudinally within the housing, a displacement occurs between the forwardmost portions of the stylet and cannula, generating a reduced pressure therein, for aspirating a biopsy for analysis.
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: December 22, 1992
    Assignee: Medical Device Technologies, Inc.
    Inventor: Harold G. Leigh
  • Patent number: 5172702
    Abstract: Soft tissue biopsy apparatus (10) for obtaining a tissue specimen. An elongate housing (12) has an opening (20) at one end (14). A hollow cannula (26) is positioned within the housing, is reciprocally movable therewithin, and one end (28) of the needle extends through the opening for insertion into tissue (T) from which a specimen is to be taken. A needle (44) is positioned within the cannula, is reciprocally movable therewithin, and also has an end (46) extending through the opening for insertion into the tissue. This needle has a recess (50) adjacent its outer end in which a tissue specimen is captured. The needle is connected to a slide (68) by which the needle is moved independently of the cannula. A sleeve (110) installed over the housing is manually operable to move the slide to a selected and cocked position prior to insertion of the cannula/needle into the tissue. Movement of the slide moves the second needle from a first position to a second position while the cannula remains stationary.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: December 22, 1992
    Assignee: Medical Device Technologies, Inc.
    Inventors: Harold G. Leigh, David L. O'Dell, Hugh A. Bourassa
  • Patent number: 5036860
    Abstract: Soft tissue biopsy apparatus (10) for obtaining a tissue specimen. An elongate housing (12) has an opening (20) at one end (14). A hollow cannula (26) is positioned within the housing, is reciprocally movable therewithin, and one end (28) of the needle extends through the opening for insertion into tissue (T) from which a specimen is to be taken. A needle (44) is positioned within the cannula, is reciprocally movable therewithin, and also has an end (46) extending through the opening for insertion into the tissue. This needle has a recess (50) adjacent its outer end in which a tissue specimen is captured. The needle is connected to a slide (68) by which the needle is moved independently of the cannula. A sleeve (110) installed over the housing is manually operable to move the slide to a selected and cocked position prior to insertion of the cannula/needle into the tissue. Movement of the slide moves the second needle from a first position to a second position while the cannula remains stationary.
    Type: Grant
    Filed: November 24, 1989
    Date of Patent: August 6, 1991
    Assignee: Medical Device Technologies, Inc.
    Inventors: Harold G. Leigh, David L. O'Dell, Hugh A. Bourassa
  • Patent number: 4711637
    Abstract: A lock for a syringe which typically may be used with an aspirating biopsy needle. A malleable sheet defining a central, cutaway portion extending through the edge of the sheet and having foldable tabs positioned on the outer edge of the sheet is carried on a syringe barrel and may be used to lock the syringe plunger in a predetermined position. Thus a vacuum may be drawn in the syringe by the plunger with the plunger then being locked to provide suction to the aspirating biopsy needle.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: December 8, 1987
    Assignee: Baxter Travenol Laboratories, Inc.
    Inventors: Harold G. Leigh, Eli Schachet
  • Patent number: 4667684
    Abstract: A biopsy device for single-handed usage by the medical practitioner for obtaining a specimen of suspected tissue, incorporating a stylet reciprocably movable within a cannula, both the stylet and cannula being fixed at their ends to respective hubs, both hubs being located within a guideway provided within the upper segment of a pistol grip style of hand gripping device, wherein the upper end of its trigger mechanism being operatively associated with the first hub and upon its depressing urging said cannula forwardly of the device, whereby upon initial urging of the device into a suspected portion of the patient's body, and urging the second hub and stylet forwardly thereof, then depressing and holding the trigger mechanism, and withdrawing of the device from the patient, a biopsy specimen is obtained for analysis.
    Type: Grant
    Filed: February 8, 1985
    Date of Patent: May 26, 1987
    Assignee: Bio-Medical Resources, Inc.
    Inventor: Harold G. Leigh
  • Patent number: 4610672
    Abstract: A locking device attached to the exterior of a syringe barrel includes a flat body having a circular opening therein for passage of a syringe plunger reciprocatably therethrough. Arms depend from the flat body to frictionally hold the device against rotation with respect to the syringe barrel when a syringe plunger is rotated to engage the locking device. At least two ridges extend chordally across the circular opening, the distance between the ridges being selected so that the ridges engage the syringe plunger when the plunger is oriented in one position but not when the plunger is oriented in another position.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: September 9, 1986
    Assignee: Sherwood Medical Company
    Inventors: Paul R. Ewalt, Harold G. Leigh, Richard W. Gilson