Patents by Inventor Peter Greenfield

Peter Greenfield 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).

  • Weatherproof while-in-use electrical receptacle cover assembly
    Patent number: 7265292
    Abstract: Weatherproof, while-in-use electrical receptacle cover assemblies include a base with a cover hingedly coupled to the base and one or more adapter plates. The cover hinge is preferably formed by a pair of camming recesses, a pair of mating pins, and a pair of leaf springs. The leaf springs urge the pins into engagement with the camming recesses. The camming recesses guide the pins in a direction perpendicular to the action of the springs. The cover is provided with at least one catch on an edge opposite the hinged coupling to the base and the base is provided with at least one pawl which engages the catch when the cover is closed. The action of the springs and the camming recesses urge the catch into engagement with the pawl which locks the cover closed against unintentional opening.
    Type: Grant
    Filed: August 10, 2005
    Date of Patent: September 4, 2007
    Inventor: Peter Greenfield
  • Weatherproof while-in-use electrical receptacle cover assembly
    Publication number: 20060231282
    Abstract: Weatherproof, while-in-use electrical receptacle cover assemblies include a base with a cover hingedly coupled to the base and one or more adapter plates. The cover hinge is preferably formed by a pair of camming recesses, a pair of mating pins, and a pair of leaf springs. The leaf springs urge the pins into engagement with the camming recesses. The camming recesses guide the pins in a direction perpendicular to the action of the springs. The cover is provided with at least one catch on an edge opposite the hinged coupling to the base and the base is provided with at least one pawl which engages the catch when the cover is closed. The action of the springs and the camming recesses urge the catch into engagement with the pawl which locks the cover closed against unintentional opening.
    Type: Application
    Filed: August 10, 2005
    Publication date: October 19, 2006
    Inventor: Peter Greenfield
  • Portable removable bicycle stand
    Patent number: 5346238
    Abstract: A stand for a bicycle that supports it at an angle. The stand includes a single elongated member which attaches to the bicycle at two locations by means of a slotted member which encircles the crank spindle and a yokeless shoulder member which supports a chain stay to support the bicycle. The opposite end of the elongated member serves to contact the ground. The stand is readily installed and removed, and is stored in a second location on the bicycle when the bicycle is in use.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: September 13, 1994
    Assignee: Greenfield Industries, Inc.
    Inventor: Peter Greenfield
  • Horizontally-mounted, weatherproof, while-in-use, electrical receptacle cover assembly
    Patent number: D529447
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: October 3, 2006
    Assignee: Greenfield Industries, Inc.
    Inventor: Peter Greenfield
  • Vertically-mounted, weatherproof, while-in-use, electrical receptacle cover assembly
    Patent number: D531961
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: November 14, 2006
    Assignee: Greenfield Industries, Inc.
    Inventor: Peter Greenfield
  • Portable removable bicycle stand
    Patent number: D350089
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: August 30, 1994
    Assignee: Greenfield Industries, Inc.
    Inventor: Peter Greenfield