Patents by Inventor Nigel R. C. Shepherd

Nigel R. C. Shepherd 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).

  • Roller assembly
    Patent number: 8506463
    Abstract: A roller assembly (40) including a roller (46) fixed to a flange bearing (48) which is engaged with a roller sleeve (50) and rotatable relative to it, the roller (46), the flange bearing (48) and the roller sleeve (50) all being retained on a mounting screw (51) between a nut (58) threaded onto the screw (51) and a washer (52) mounted on the nut (51).
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: August 13, 2013
    Assignee: The Haigh Engineering Company Limited
    Inventors: Nigel R C Shepherd, Gary P. Deaville
  • Grit elevator
    Patent number: 8136673
    Abstract: A grit elevator (30) including a plurality of solid screens (104) in the form of a rotatable endless belt, one or more grit collectors (116) on the interior of the endless belt, and a grit inlet (172) leading to the interior of the endless belt.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: March 20, 2012
    Assignee: The Haigh Engineering Company Ltd.
    Inventor: Nigel R C Shepherd
  • ROLLER ASSEMBLY
    Publication number: 20100062920
    Abstract: A roller assembly (40) including a roller (46) fixed to a flange bearing (48) which is engaged with a roller sleeve (50) and rotatable relative to it, the roller (46), the flange bearing (48) and the roller sleeve (50) all being retained on a mounting screw (51) between a nut (58) threaded onto the screw (51) and a washer (52) mounted on the nut (51).
    Type: Application
    Filed: September 4, 2009
    Publication date: March 11, 2010
    Applicant: THE HAIGH ENGINEERING COMPANY LIMITED
    Inventors: Nigel R C Shepherd, Gary P. Deaville
  • Rotary disintegrators
    Patent number: 5544819
    Abstract: A rotary disintegrator for liquid-borne solid waste, for example, has a cutter head (14) in which a rotatable headstock having cutting blades (28, 30) is urged by springs (38) against a shear plate (15). A signalling means for signalling predetermined wear of the shear plate (15) by the cutting blades (28, 30) includes a wear detector (65) having a rod electrode (67) mounted by an insulating plug (72) within a bore (74) in the shear plate (15). When the plug (72) is worn by the cutting blades to expose the electrode (67) the electrical circuit of the signalling means is completed thus providing an indication that a predetermined degree of wear of the shear plate (15) has occurred.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: August 13, 1996
    Assignee: The Haigh Engineering Company Ltd.
    Inventor: Nigel R. C Shepherd
  • Macerator pumping impeller
    Patent number: 4422580
    Abstract: A macerator is disclosed which has an impeller which on its upstream side is provided with radial fins adjacent fixed teeth and through which a number of slots pass. On its downstream side an outwardly flared member is provided with radial vanes. Effluent entering the macerator is thrown by the fins onto the teeth and can than pass through the slots to be thrown outwardly by the member and then to the macerator outlet. The provision of the member provides a significant pumping effect.
    Type: Grant
    Filed: June 9, 1981
    Date of Patent: December 27, 1983
    Assignee: The Haigh Engineering Co. Ltd.
    Inventors: Nigel R. C. Shepherd, Graham M. Preece