Patents Assigned to Laser Engineering Development Ltd.
  • Pile driving apparatus
    Patent number: 4029158
    Abstract: Apparatus for use in driving a pile by means of successive hammer blows at the same time as a vibratory force is to be applied to the pile comprises means for simultaneously transmitting, to a pile to be driven, a force produced by a hammer blow and a vibrating force which is generated by the application of the hammer blow.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: June 14, 1977
    Assignee: Laser Engineering Development Ltd.
    Inventor: Arthur Gerrish