Patents by Inventor David T. Ping

David T. Ping 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: 4983094
    Abstract: Yieldably suspended attachments for lifting trailers or containers are difficult to accurately position. Therefore, load pick-up and deposit is inefficient and inaccurate. A load lifting attachment having an elevationally movable connecting frame, a load engaging frame having first and second end portions, and first and second link assemblies yieldably connecting the load engaging frame to the connecting frame first end portion is provided. A connecting arrangement connects the load engaging frame second end portion to the connecting frame, maintains the load engaging frame for free elevational movement relative to the connecting frame, and controllably moves the load engaging frame second end portion between elevationally spaced apart locations relative to the connecting frame. Therefore, the aforementioned problems related to the positioning of the load lifting attachment are alleviated. The load lifting attachment is particularly suited for use on a material handling vehicle having a lift mast.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: January 8, 1991
    Assignee: Caterpillar Industrial Inc.
    Inventor: David T. Ping
  • Patent number: 4459080
    Abstract: Log handling attachments frequently encounter inadvertent log loss during transportation, and damage to the logs and the log handling forks (36,38) due to excessive loading. A log handling attachment (14) is provided which has a pair of log carrying forks (36,38), a clamp (48), an ejector (88), a first power device (50) actuatable to pivotally move the clamp (48) between open and closed positions (51,53), a second power device (93) actuatable to move the ejector (88) between log accepting and log rejecting positions (94,96), and an apparatus (70) actuatable to move the clamp between the closed position (53) and a log grappling position (86) relative to the ejector (88) at which the logs are elevationally supported above the forks (36,38). Thus the problems of log loss, log damage and fork failure is alleviated. The log handling attachment (14) is particularly suited for use on a lift mast (12) of a lift truck (10).
    Type: Grant
    Filed: June 9, 1983
    Date of Patent: July 10, 1984
    Assignee: Towmotor Corporation
    Inventors: Llewellyn L. Walter, David T. Ping
  • Patent number: 4452332
    Abstract: This invention relates to an apparatus and method for mounting a transmission (32) in a frame (10) of a vehicle (12) which eliminates the problems of accessibility, complexity and the need to elevate the vehicle for access from beneath. The mounting arrangement has a first trunnion (42) releasably connected to a first side (34) of the transmission (32) which is slidably disposed in an aperture of a first side member (14) of a frame (10) and a second trunnion (52) releasably connected to a second side (36) of the transmission (32) and slidably disposed in an aperture in a second side (16) of the frame (10) and a guide apparatus (72) for slidably connecting a second end (40) of the transmission (32) to the frame (10) and guiding the transmission (32) for movement in directions substantially normal to a transverse trunnion axis defined by said trunnions.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: June 5, 1984
    Assignee: Towmotor Corporation
    Inventors: David T. Ping, Edwin Reeve, Philip S. Webber
  • Patent number: 4262766
    Abstract: A mounting support for releasably connecting a transaxle or differential housing (10) to a vehicle frame (12) has a support sleeve (13) telescopically connected to both a cylindrical portion (16) of a support member (14) connected to the frame (12) and a cylindrical protrusion (19) of the housing (10). Axial movement of the support sleeve (13) is selectively limited by a snap ring retainer (31) seated in an annular groove (24) in the annular protrusion (19). The support sleeve (13) is cylindrical so that only a minimal amount of clearance between it and adjacent components is required.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: April 21, 1981
    Assignee: Towmotor Corporation
    Inventors: Vaikai K. Brown, Roy M. Gedeon, David T. Ping
  • Patent number: 4109744
    Abstract: A construction vehicle, such as a truck, comprises a main frame having an engine and a radiator mounted thereon. An inverted U-shaped cowl assembly is secured to the frame, adjacent to the radiator. A perforated guard assembly is secured on the cowl assembly to cover the radiator to protect the same.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: August 29, 1978
    Assignee: Caterpillar Tractor Co.
    Inventor: David T. Ping