Patents by Inventor Anthony Edward Walter Last

Anthony Edward Walter Last 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).

  • Impact absorbing fluid operated hammer
    Patent number: 6135214
    Abstract: An impact hammer having a non-mechanical connection between the driving piston rod and the impact ram. The non-mechanical connection includes an annular body portion connected to the lower end of the piston rod which is received in a cavity in the top surface of the impact ram, and an elastomeric ring is held in facing grooves in the cavity and the annular body member to constitute the sole connecting element between the piston rod and the impact ram.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: October 24, 2000
    Assignee: International Construction Equipment, Inc.
    Inventor: Anthony Edward Walter Last
  • Pile drivers
    Patent number: 4098356
    Abstract: A pile driver operated by a pressure supply of compressible fluid has a cushioning fluid chamber for transmitting the driving pulses to a pile. Both the cushioning chamber and the working chambers for generating the driving pulses are connected to an enclosed space from which the exhaust flow of fluid is able to escape by way of muffler means. The cushioning chamber draws in air at or near atmospheric pressure by way of said space which is in permanent communication with the exterior through the muffler means.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: July 4, 1978
    Assignee: BSP International Foundations Limited
    Inventor: Anthony Edward Walter Last