Patents by Inventor John A. Van Dongen

John A. Van Dongen 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).

  • Molded fluid conduit fitting with integral swivel nut
    Patent number: 4784412
    Abstract: A T-block fitting (22) has an integral molded plastic body (24) including a stem (28) with a radial shoulder (26) and a radial flange (30) on opposite ends. An externally threaded split nut (40, 42) has a major portion (40) with a circumferential extent greater than 180.degree., and a minor portion (42). Complementary chordal mating surfaces (46, 62) are formed on the major and minor portions (40, 42). A semicylindrical projection (64) extends perpendicularly from each mating surface (62) and is received into a corresponding recess (48) in the abutting mating surface (46). A slot (50) extends along each mating surface (46) on the head portion (54) of the major portion (40). The slot (50) opens onto an outer surface of the head portion (54) and terminates in an inner enlarged diameter portion (52). A corresponding projection (66) with an enlarged inner end (68) is formed on each mating surface (62 ).
    Type: Grant
    Filed: September 16, 1987
    Date of Patent: November 15, 1988
    Assignee: Red Dot Corporation
    Inventor: John A. Van Dongen