Patents by Inventor David D. Demarest

David D. Demarest 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: 5937504
    Abstract: A semi-automated machine for singulating individual surgical needles from an bulk supply and attaching a suture to the surgical needle is described. Each of the surgical needles has a suture receiving opening formed therein for receiving a suture. The machine includes a needle singulation station, a precise positioning station, a suture feeding station, a swage station, a pull-test station and an off-load station. A universal gripper mounted on a rotary indexing device automatically receives each individual needle in a predetermined orientation and conveys the needle for sequential processing from station to station to form the needle-suture assembly. The rotary indexing device includes two coaxial cam dials that provide rotation and reciprocation of the universal gripper, and an off-set drive is provided at two locations for laterally off setting the radial reciprocation of the universal gripper.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: August 17, 1999
    Assignee: Ethicon, Inc.
    Inventors: Anthony Esteves, Robert A. Daniele, David D. Demarest
  • Patent number: 5920482
    Abstract: Methods and procedures for varying parameters at a work station where different size and/or type needles are automatically sutured to different size and/or type sutures, such as: a method and system for applying a predetermined, given tension to different size and/or type sutures; a system and method for inserting a suture into different size and/or type needles to a predetermined, given depth; and a method and system to cool different size and/or type sutures for a predetermined, given length of time. Values for these parameters may be stored in a supervisor computer and then transmitted to controllers to operate the work station with these parameter values for each of a plurality of different size and/or type sutures and/or needles.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: July 6, 1999
    Assignee: Ethicon, Inc.
    Inventors: David D. Demarest, Michael G. Hodulik, Timothy P. Lenihan, Loy William Shreve, II
  • Patent number: 5915751
    Abstract: A semi-automated machine for singulating individual surgical needles from an bulk supply and attaching a suture to the surgical needle is described. Each of the surgical needles has a suture receiving opening formed therein for receiving a suture. The machine includes a needle singulation station, a precise positioning station, a suture feeding station, a swage station, a pull-test station and an off-load station. A universal gripper mounted on a rotary indexing device automatically receives each individual needle in a predetermined orientation and conveys the needle for sequential processing from station to station to form the needle-suture assembly. A suture feeding and cutting station automatically cuts an indefinite length of suture material to a definite length suture strand and automatically inserts an end of the definite length suture strand into the suture receiving opening formed in the needle.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: June 29, 1999
    Assignee: Ethicon, Inc.
    Inventors: Anthony Esteves, John F. Blanch, David D. Demarest, Robert A. Daniele
  • Patent number: 5918284
    Abstract: A semi-automated machine for singulating individual surgical needles from an bulk supply and attaching a suture to the surgical needle is described. Each of the surgical needles has a suture receiving opening formed therein for receiving a suture. The machine includes a needle singulation station, a precise positioning station, a suture feeding station, a swage station, a pull-test station and an off-load station. A universal gripper mounted on a rotary indexing device automatically receives each individual needle in a predetermined orientation and conveys the needle for sequential processing from station to station to form the needle-suture assembly. A swage station is provided for swaging the needle to close the suture receiving opening about the suture to secure said suture thereto and form therefrom a needle and suture assembly. The suture pull-test station tests each needle suture bond with a pre-determined pull for quality control. This pull is adjustable via a precision spring tension device.
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: June 29, 1999
    Assignee: Ethicon, Inc.
    Inventors: John F. Blanch, Anthony Esteves, David D. Demarest
  • Patent number: 5911449
    Abstract: A semi-automated machine for singulating individual surgical needles from an bulk supply and attaching a suture to the surgical needle is described. Each of the surgical needles has a suture receiving opening formed therein for receiving a suture. The machine includes a needle singulation station, a precise positioning station, a suture feeding station, a swage station, a pull-test station and an off-load station. The singulation station has a sliding surface that assists an operator in singulating needles and depositing them in a pair of drop locations for subsequent automatic handling. Indexing conveyors, an articulated robot and a precision conveyor are used with a pre-positioning and a precise positioning station for orienting each needle for automatic handling. A universal gripper mounted on a rotary indexing device automatically receives each individual needle in a predetermined orientation and conveys the needle for sequential processing from station to station to form the needle-suture assembly.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: June 15, 1999
    Assignee: Ethicon, Inc.
    Inventors: Robert A. Daniele, Anthony Esteves, David D. Demarest
  • Patent number: 5873212
    Abstract: A semi-automated machine for singulating individual surgical needles from an bulk supply and attaching a suture to the surgical needle is described. The machine includes a needle singulation station, a precise positioning station, a suture feeding station, a swage station, a pull-test station and an off-load station. A universal gripper mounted on a rotary indexing device automatically receives each individual needle in a predetermined orientation and conveys the needle for sequential processing from station to station to form the needle-suture assembly. The rotary indexing device is driven by a single shaft drive assembly which provides a compact annular drive from two intermittent indexing drives to two coaxial cam dials that provide rotation and reciprocation of the universal gripper. A swage station is provided for swaging the needle to close the suture receiving opening about the suture to secure said suture thereto and form therefrom a needle and suture assembly.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: February 23, 1999
    Assignee: Ethicon, Inc.
    Inventors: Anthony Esteves, David D. Demarest
  • Patent number: 5844142
    Abstract: A semi-automated machine for singulating individual surgical needles from an bulk supply and attaching a suture to the surgical needle is described. Each of the surgical needles has a suture receiving opening formed therein for receiving a suture. The machine includes a needle singulation station, a precise positioning station, a suture feeding station, a swage station, a pull-test station and an off-load station. A universal gripper mounted on a rotary indexing device automatically receives each individual needle in a predetermined orientation and conveys the needle for sequential processing from station to station to form the needle-suture assembly. A swage station is provided for swaging the needle to close the suture receiving opening about the suture to secure said suture thereto and form therefrom a needle and suture assembly. The suture pull-test station tests each needle suture bond with a pre-determined pull for quality control. This pull is adjustable via a precision spring tension device.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: December 1, 1998
    Assignee: Ethicon, Inc.
    Inventors: John F. Blanch, Anthony Esteves, David D. Demarest
  • Patent number: 5793634
    Abstract: Procedures for adjusting or reseting the pressure used to swage needles to suture at a needle swaging station. The forces required to break the sutures from the needles are measured and added to a data base; and each time a value, or sample, is added to that data base, an average of all the sample values in the data base is calculated. Each time an average value is calculated, that value is compared to a first range, referred to as a reject range. If any calculated average value falls outside that reject range, then the swaging pressure is adjusted and the procedure is restarted, with a new, or empty, data base. Also, once the sample reaches a given size, such as eight or nine samples, the calculated average values are also compared to a second range, referred to as an accept range, and which is within and narrower than the reject range. If a calculate average value is within this accept range, the swaging pressure is considered acceptable and the procedure terminates immediately.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: August 11, 1998
    Assignee: Ethicon, Inc.
    Inventors: David D. Demarest, Michael G. Hodulik, Teresa M. Shaw, Irwin J. Shiffer, Anthony Esteves
  • Patent number: 4457421
    Abstract: The present invention discloses an apparatus for stand-up orientation of bottles, which apparatus has a minimum of moving parts, and includes an assembly of side gripping belts substantially parallel to a stand-up chute. The belts are driven at speeds commensurate with the bottles speed while coming from an alignment chute under the influence of gravity. In order to accomplish the stand-up orientation of the bottles, the assembly of belts is adjustable relative to the stand-up chute. The apparatus further consists of means to deliver bottles to the alignment chute and means to remove bottles which have been stood up.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: July 3, 1984
    Inventors: Robert J. Krooss, David D. Demarest