Patents by Inventor Allan P. Rustad

Allan P. Rustad 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).

  • Hauling sheave with cleats
    Patent number: 5346181
    Abstract: A hauling block 20 having a sheave 30 comprising two identical halves 32 and 34. The hauling surfaces 40 and 42 of the sheave 30 carry outwardly extending, cleat receiving pockets 54. Reinforced cleats 50 are seated in the pockets 54 and releasably fastened to the sheave 30.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: September 13, 1994
    Assignee: Marco Seattle, Inc.
    Inventors: Harold T. Cook, Jr., Donn B. Furlong, Robert A. Svendsen, Allan P. Rustad
  • Hydraulic swivel
    Patent number: 5188146
    Abstract: A hydraulic swivel 40 transfers pressurized hydraulic fluid from a stationary spool 50 to a housing 42 mounted for rotation relative to the spool 50. The swivel 40 also carries a drain line 64 placed in fluid communication with the spool/housing interface above and below the pressurized fluid passages so that any fluid leaking from the pressurized fluid passages will find its way to the drain and thus not to the outside of the swivel.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: February 23, 1993
    Assignee: Marco Seattle, Inc.
    Inventors: Harold T. Cook, Jr., Donn B. Furlong, Robert A. Svendsen, Allan P. Rustad