Patents Assigned to Sobstad Sailmakers, Inc.
  • Structural sails
    Patent number: 4831953
    Abstract: A sail wherein the loads thereon in use are carried predominantly by structural members properly disposed within the sail.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: May 23, 1989
    Assignee: Sobstad Sailmakers, Inc.
    Inventor: Peter G. Conrad
  • Structural sail with improvements in leech area
    Patent number: 4815409
    Abstract: An improved structural sail with stress bearing members specifically oriented along the leech to eliminate and/or minimize "hard" leech or leech "fall-off".
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: March 28, 1989
    Assignee: Sobstad Sailmakers, Inc.
    Inventor: Peter G. Conrad
  • Composite thread line sails
    Patent number: 4708080
    Abstract: Sails made with threads running in the direction of principal stresses in a laminate made of the threads laminated to a film material, such as Mylar.
    Type: Grant
    Filed: June 11, 1986
    Date of Patent: November 24, 1987
    Assignee: Sobstad Sailmakers, Inc.
    Inventor: Peter G. Conrad
  • Structural sail with grid members
    Patent number: 4702190
    Abstract: An improved structural sail with grid members appropriately positioned to resist aerodynamic loads.
    Type: Grant
    Filed: December 14, 1985
    Date of Patent: October 27, 1987
    Assignee: Sobstad Sailmakers, Inc.
    Inventor: Peter G. Conrad
  • Method of stress distribution in a sail, a sail embodying the same and sail construction
    Patent number: 4624205
    Abstract: A sail and a method for constructing a sail or any pliable lifting surface where the lift for or the motive power therefor is wind.
    Type: Grant
    Filed: April 11, 1985
    Date of Patent: November 25, 1986
    Assignee: Sobstad Sailmakers, Inc.
    Inventor: Peter G. Conrad
  • Method of stress distribution in a sail and sail construction
    Patent number: 4593639
    Abstract: A method for constructing a sail or any pliable lifting surface where the lift for or the motive power therefor is wind and a sail as an article of manufacture.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: June 10, 1986
    Assignee: Sobstad Sailmakers, Inc.
    Inventor: Peter G. Conrad