Patents by Inventor Donald C. Ferdelman

Donald C. Ferdelman 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).

  • Patent number: 4711463
    Abstract: An upper mount assembly for a suspension strut which incorporates an elastomer bushing operatively connecting the piston rod to support structure that works in shear over initial travel but has compression load buildup at the limit of mount travel. The mount assembly is a unitized multi-element construction having a jounce bumper to provide a load path for suspension spring assist and a load deflection curve to improve suspension characteristics. In this invention, load buildup is achieved in jounce and rebound with the use of a rate washer which is moved upwardly by the strut in jounce movement. Initial travel works the bushing in shear but the elastomer becomes compressed between the washer and an outside metal wall to provide increasing spring rate. When the rod moves vertically downwardly in rebound, the washer controls the load buildup and compresses the upper portion of the jounce bumper for soft entry into rebound.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: December 8, 1987
    Assignee: General Motors Corporation
    Inventors: Joseph J. Knable, Donald C. Ferdelman, Gerald M. Bojanowski
  • Patent number: 4209995
    Abstract: A room air conditioner unit having juxtaposed main function switch means and auxiliary function switch means operative in a control circuit with an electric timer located in the unit's control area. The main function switch means has interlocked switches to operate a fan motor at low fan speed only, low fan speed cooling or high fan speed cooling while the auxiliary function switch means provides a plurality of manually actuable interlocked power-saver and timer switches such that a minimum of twelve different combinations of functions are achieved by the control circuit.
    Type: Grant
    Filed: January 23, 1979
    Date of Patent: July 1, 1980
    Assignee: White Consolidated Industries, Inc.
    Inventor: Donald C. Ferdelman
  • Patent number: 4144930
    Abstract: An improved heat-cool room air conditioner unit control system having an electric timer located at the control area with the timer including a timer motor which runs continuously. A multi-gang selector switch is arranged in the control circuit with timer contacts and a single pole-double throw relay contact such that the selector switch and relay will selectively operate the unit in either a timed cooling mode or an untimed demand heating mode.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: March 20, 1979
    Assignee: General Motors Corporation
    Inventor: Donald C. Ferdelman
  • Patent number: 4041723
    Abstract: A room air conditioner unit having an electric timer located at the control area with the timer including a timer motor which runs continuously and a timer switch electrically connected in the unit's control circuit with a manually operable multiple selector switch. Upon the timer switch being preset to open and close the control circuit allows the user to select either a timed electricity saver mode wherein the fan motor cycles on and off with the compressor or a timed cooling mode wherein the fan motor runs continuously while the compressor is cycled by the unit thermostat.
    Type: Grant
    Filed: November 3, 1976
    Date of Patent: August 16, 1977
    Assignee: General Motors Corporation
    Inventors: John Weibel, Jr., Donald C. Ferdelman
  • Patent number: 3974661
    Abstract: A room air conditioner wall sleeve and subbase assembly for a 277 voltage range permanently wired installation located in a room wall opening. The subbase casing has a pair of side-by-side removable covered openings providing access to separate enclosures, one of which encases an electrical outlet receptacle for the power cord plug of the air conditioner chassis while the other enclosure encases the permanent field or "hard" wiring connection for the installation. The access cover for the power cord receptacle enclosure has a self-contained outwardly formed shield, including an upwardly extending portion that defines, with the sleeve front flange and sleeve front assembly, a convenient code approved electrical duct passage for encasing the power cord.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: August 17, 1976
    Assignee: General Motors Corporation
    Inventors: Donald C. Ferdelman, John H. Loos