Patents by Inventor Anton D. Pfeiffer

Anton D. Pfeiffer 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).

  • Electrical ground protection device, circuit tester and method of circuit condition detection
    Patent number: 8339270
    Abstract: An apparatus and method for protecting against electrocution hazards that arise when an appliance is electrically connected to a miswired single-phase AC electrical source which includes an energized ground lead are described. The apparatus includes one or more sensors that detect electrical energy in the ground lead combined with a miswiring condition in the hot and common leads. A tester embodiment is also illustrated. The method includes the steps of detecting if the putative ground of the electrical source is energized and whether the hot and common leads are reversed.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: December 25, 2012
    Assignee: General Wire Spring Company
    Inventors: Arthur A. Silverman, Anton D. Pfeiffer
  • Drain cleaning apparatus with restricted reverse function
    Patent number: 7935192
    Abstract: A rotatable, portable drum auger drain cleaning device includes a rotational control which is biased towards the off position. The rotational control device is utilized in conjunction with a motor and the drum to direct drum rotation. The rotational control is typically biased in the off position making it the default position. The rotational control must therefore be manually moved to either a forward or reverse position. When in the forward position, the rotational control can be locked, and when in the reverse position, the switch must be manually held in position or the switch will return to the off position.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: May 3, 2011
    Assignee: General Wire Spring Co.
    Inventors: David Silverman, Michael Silverman, Anton D. Pfeiffer
  • DRAIN CLEANING APPARATUS WITH RESTRICTED REVERSE FUNCTION
    Publication number: 20100139696
    Abstract: A rotatable, portable drum auger drain cleaning device includes a rotational control which is biased towards the off position. The rotational control device is utilized in conjunction with a motor and the drum to direct drum rotation. The rotational control is typically biased in the off position making it the default position. The rotational control must therefore be manually moved to either a forward or reverse position. When in the forward position, the rotational control can be locked, and when in the reverse position, the switch must be manually held in position or the switch will return to the off position.
    Type: Application
    Filed: December 8, 2008
    Publication date: June 10, 2010
    Applicant: GENERAL WIRE SPRING CO.
    Inventors: David Silverman, Michael Silverman, Anton D. Pfeiffer
  • Electrical ground protection device, circuit tester and method of circuit condition detection
    Publication number: 20090160663
    Abstract: An apparatus and method for protecting against electrocution hazards that arise when an appliance is electrically connected to a miswired single-phase AC electrical source which includes an energized ground lead are described. The apparatus includes one or more sensors that detect electrical energy in the ground lead combined with a miswiring condition in the hot and common leads. A tester embodiment is also illustrated. The method includes the steps of detecting if the putative ground of the electrical source is energized and whether the hot and common leads are reversed.
    Type: Application
    Filed: December 21, 2007
    Publication date: June 25, 2009
    Inventors: Arthur A. Silverman, Anton D. Pfeiffer