Patents Assigned to National Coupling Inc.
  • Sleeve for quick disconnect coupling
    Patent number: 5775744
    Abstract: A quick disconnect coupling utilizing a sleeve which is biased to secure the coupling members together. The sleeve has an internal cylindrical surface with a pair of protrusions which are machined or cast into the sleeve, dimensioned to slide within a longitudinal groove extending at least partially along the outer body of the female member of the coupling.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: July 7, 1998
    Assignee: National Coupling Inc.
    Inventor: Robert E. Smith, III
  • Undersea hydraulic coupling member
    Patent number: 5692538
    Abstract: An undersea hydraulic coupling member is disclosed having angled flow ports to prevent ingress of debris into the hydraulic lines, and having a bleed passage to allow trapped hydraulic fluid to bleed off when the coupling members are disconnected. The poppet valve in combination with the angled flow ports helps keep the hydraulic system clear of debris when the members are disconnected.
    Type: Grant
    Filed: September 21, 1994
    Date of Patent: December 2, 1997
    Assignee: National Coupling Inc.
    Inventor: Robert E. Smith, III
  • Hydraulic coupling with pressure equalizing valve
    Patent number: 5469887
    Abstract: A hydraulic coupling having a pressure-equalizing valve in the female coupler body is disclosed. A passage extends between the central bore or receiving chamber and the external surface of the female member. A valve in the passage allows sea water to flow into the annulus during connection or disconnection of the male and female coupling members, thus equalizing the pressure and preventing implosion of seals during disconnection of the coupling members.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: November 28, 1995
    Assignee: National Coupling Inc.
    Inventor: Robert E. Smith, III