Patents by Inventor Henry A. Nelson Holland

Henry A. Nelson Holland 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).

  • Distributor head for a pipe lining machine
    Patent number: 4414918
    Abstract: A distributor head for throwing mortar onto the wall of a pipe (12) being lined. A set of inner rotating vanes (56) throw the mortar onto an outwardly flared conical surface (40 ) and the mortar travels along the surface (40) to the outer vanes (48) on its outer edge from which the mortar is thrown in a high velocity, dense stream against the pipe wall. The inner vanes are individually and releasably fitted into a collar (60) at the inner edge of the flared conical surface.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: November 15, 1983
    Assignee: Raymond International Builders, Inc.
    Inventors: Henry A. Nelson Holland, James Bandura
  • Gas discharge type underwater hammer with liquid purge and reflood control
    Patent number: 4126191
    Abstract: An underwater hammer, of the gas discharge type, is provided with a surrounding casing arranged in the nature of a diving bell from which liquid can be purged so that the hammer ram may move up and down with minimum resistance. A reflood tube extends down through the upper end of the casing and opens into an axial reflood passageway in the ram and liquid is pumped through this tube to obtain reflooding after each cycle of operation.
    Type: Grant
    Filed: June 3, 1977
    Date of Patent: November 21, 1978
    Assignee: Raymond International Inc.
    Inventors: George J. Gendron, Henry A. Nelson Holland
  • Underwater hammer with circumferential flow seal
    Patent number: 4098355
    Abstract: An underwater hammer, of the gas discharge type, is provided with a circumferential control valve on the hammer ram to allow free flow of water and gas upwardly along the ram in the annular clearance between the ram and a tubular sleeve in which it is guided, but to interrupt the flow of water downwardly along the ram. The control valve allows the region under the ram to be purged of water when the ram is driven upwardly in the sleeve and it prevents water thereafter from flowing back down under the ram where it would otherwise cushion ram impact on an anvil.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: July 4, 1978
    Assignee: Raymond International Inc.
    Inventors: George J. Gendron, Henry A. Nelson Holland
  • Method for operating pile driver
    Patent number: 4058175
    Abstract: Method and apparatus for forming piles in the earth with a pile hammer rig having a hoisting drum carried by a crane, driving and braking apparatus for the drum, a drop-weight, a hoisting rope leading from the drum for lifting the drop-weight, apparatus for selectively absorbing kinetic energy of the drum and rope disposed adjacent the drop-weight; apparatus for applying the drum brake prior to impact of the drop-weight; and a fluid swivel system for connecting the drop-weight to the hoisting rope.
    Type: Grant
    Filed: July 6, 1976
    Date of Patent: November 15, 1977
    Assignee: Raymond International Inc.
    Inventor: Henry A. Nelson Holland
  • Cable operated apparatus for forming piles
    Patent number: 4002211
    Abstract: Method and apparatus for forming piles in the earth with a pile hammer rig having a hoisting drum carried by a crane, driving and braking apparatus for the drum, a drop-weight, a hoisting rope leading from the drum for lifting the drop-weight, apparatus for selectively absorbing kinetic energy of the drum and rope disposed adjacent the drop-weight; apparatus for applying the drum brake prior to impact of the drop-weight; and a fluid swivel system for connecting the drop-weight to the hoisting rope.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: January 11, 1977
    Assignee: Raymond International Inc.
    Inventor: Henry A. Nelson Holland