Patents by Inventor David R. McMahan

David R. McMahan 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: 4712164
    Abstract: A vehicle headlamp assembly includes a box-like support frame enclosing a lamp body mounted adjustably, as by support shoes slidable in slots of the frame, by rotary manipulation of threaded elements, accessible at improved locations on the frame.
    Type: Grant
    Filed: January 30, 1986
    Date of Patent: December 8, 1987
    Assignee: General Motors Corporation
    Inventors: David R. McMahan, Leslie H. Hallgarth, Gary L. Miller
  • Patent number: 4709305
    Abstract: An improved electrical connector for use with a headlight assembly of the type in which the headlight is sandwiched between a bezel and a housing with an inner surface of the housing overlying the back surface of the headlight with an access hole in the housing opening to the headlight terminals. The electrical connector compensates for angular tolerance variations in the headlight terminals that can cause a variance in the spatial relation between the connector and the housing. The connector includes a pliant sealing boot surrounding a rigid socket, with ears of the socket contained within pockets of the sealing boot, cooperatively forming composite compression pads of a dual flexibility.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: November 24, 1987
    Assignee: General Motors Corporation
    Inventors: David R. McMahan, John D. Geddie
  • Patent number: 4707771
    Abstract: A support shoe for pivotably connecting a headlamp body to a support frame and including a block member and a retaining member each of which is provided with a spherical surface so, when the block member and retaining member are interconnected, a socket is formed for the ball portion of the ball stud connected to the headlamp body.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: November 17, 1987
    Assignee: General Motors Corporation
    Inventors: Paul D. Van Duyn, David R. McMahan, John D. Geddie, William E. Nagengast, Jr.
  • Patent number: 4639840
    Abstract: A headlamp assembly provided with a retainer for maintaining a headlamp unit in an adjustable support bracket and having a rim that provides an aiming surface for the aiming pads of the headlamp unit. The support bracket carries spring means which engages a rear portion of the headlamp unit and biases the aiming pads of the headlamp unit into engagement with the rim with the result that when a replacement lamp unit is mounted in the support bracket, the replacement lamp unit is automatically aimed by the retainer.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: January 27, 1987
    Assignee: General Motors Corporation
    Inventors: David R. McMahan, Richard W. Nicholas
  • Patent number: 4599681
    Abstract: A headlamp assembly which includes a support bracket that carries a pair of headlamp units in side-by-side relationship and is attached to a support housing at three pivot points so as to allow simultaneous adjustable positioning of the headlamp units about a horizontal axis or a vertical axis.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: July 8, 1986
    Assignee: General Motors Corp.
    Inventors: David R. McMahan, Richard W. Nicholas
  • Patent number: 4415956
    Abstract: A retainer member for maintaining a headlamp within a housing characterized in that one portion of the retainer member is connected to the housing by a pivotal connection and another portion of the retainer member is connected to the housing by a spring clip arrangement that is manually released when it is desired to remove the headlamp from the housing.
    Type: Grant
    Filed: December 17, 1982
    Date of Patent: November 15, 1983
    Assignee: General Motors Corporation
    Inventor: David R. McMahan
  • Patent number: 4414614
    Abstract: A spring clip which is removably attached to a retainer member for maintaining a headlamp within a housing and includes a pair of leg sections carried by the housing that cooperate with a flange on the retainer member for locking the retainer member to the housing.
    Type: Grant
    Filed: December 17, 1982
    Date of Patent: November 8, 1983
    Assignee: General Motors Corporation
    Inventors: David R. McMahan, Richard W. Nicholas
  • Patent number: 4413856
    Abstract: A substantially rigid bumper is mounted to vehicle frame by special spring brackets which allow bumper movement relative to frame on impact. Cellular energy absorbing media housed within the brackets absorb impact energy and cooperate with bracket for improved bumper support.
    Type: Grant
    Filed: August 7, 1981
    Date of Patent: November 8, 1983
    Assignee: General Motors Corporation
    Inventors: David R. McMahan, Gary P. Zeller, Ronald W. Slaughter, Martin D. Skirha, Dean M. Bayer
  • Patent number: 4412275
    Abstract: A support housing for a vehicle headlamp that includes a pair of pivotally interconnected ring members adjustable about a pair of mutually perpendicular pivot axes by a pair of vertically oriented adjustment screws which are located to the rear of the headlamp and within the peripheral confines of the headlamp lens.
    Type: Grant
    Filed: December 17, 1982
    Date of Patent: October 25, 1983
    Assignee: General Motors Corporation
    Inventor: David R. McMahan
  • Patent number: 4412274
    Abstract: A support housing for a vehicle headlamp that includes a pair of pivotally interconnected ring members adjustable about a pair of mutually perpendicular pivot axes by a pair of vertically oriented adjustment screws which are located to the rear of the headlamp and within the peripheral confines of the headlamp lens.
    Type: Grant
    Filed: December 17, 1982
    Date of Patent: October 25, 1983
    Assignee: General Motors Corporation
    Inventors: David R. McMahan, Ronald O. Woodward