Patents by Inventor Raymond Jeffrey Dufty

Raymond Jeffrey Dufty 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).

  • Patent number: 10842064
    Abstract: A rolling assembly, the rolling assembly including: a body; one or more surface rollers rotatable with respect to the body; and at least one rotatable sweeping device including: an elongate member rotatable with respect to the body; and a sweeping head located over the elongate member and rotatable with respect to the elongate member, wherein the sweeping head is configured to engage with the one or more surface rollers such that the rotation of the one or more surface rollers rotates the sweeping head.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: November 24, 2020
    Inventors: Dorothea Isabel Maud Rix, Raymond Jeffrey Dufty
  • Patent number: 10362737
    Abstract: A roller assembly including: a frame; a first undercarriage connected to the frame, the first undercarriage comprising: a first body; a rear roller connected to the first body; and a first overlapping roller that is elongate and connected to the first body; and a second undercarriage connected to the frame, the second undercarriage comprising: a second body; a front roller connected to the second body; and a second overlapping roller that is elongate and connected to the second body, wherein the first undercarriage is positioned adjacent to the second undercarriage such that the first overlapping roller overlaps the second overlapping roller.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: July 30, 2019
    Inventors: Dorothea Isabel Maud Rix, Raymond Jeffrey Dufty
  • Patent number: 9918421
    Abstract: A spiker roller having (i) a roller assembly having a plurality of roller components each having a peripheral wall and a plurality of apertures in each wall and a centrally located hub or boss surrounding an opening; (ii) a multiplicity of spikes which are each releasably retained within a respective aperture of each roller component; and (iii) a support shaft which is insertable through each of the openings of each roller component wherein in operation each of the roller components rotate independently of each other.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: March 20, 2018
    Assignee: TRU-TURF PTY LTD.
    Inventor: Raymond Jeffrey Dufty
  • Publication number: 20150075825
    Abstract: A spiker roller having (i) a roller assembly having a plurality of roller components each having a peripheral wall and a plurality of apertures in each wall and a centrally located hub or boss surrounding an opening; (ii) a multiplicity of spikes which are each releasably retained within a respective aperture of each roller component; and (iii) a support shaft which is insertable through each of the openings of each roller component wherein in operation each of the roller components rotate independently of each other.
    Type: Application
    Filed: March 18, 2013
    Publication date: March 19, 2015
    Inventor: Raymond Jeffrey Dufty
  • Publication number: 20140014379
    Abstract: An idler roller assembly having a roller tube which has a constant diameter throughout its length and does not have machined ends or ends formed with integrally formed flanges. An end cap is attached to each end of the roller tube which has a hollow internal bore and an outer seal insert retained within the hollow internal bore of the end cap and having an internal recess and adapted for rotation with the roller tube and end cap. A stationary inner seal is located in the recess and having a flexible lip. Also included is a bearing retained within the internal bore of the end cap as well as a stationary shaft extending through a hollow interior of the roller tube wherein the inner seal is fixed to the stationary shaft. There is also provided an inner fastening member retaining the bearing in position within the end cap.
    Type: Application
    Filed: July 10, 2012
    Publication date: January 16, 2014
    Inventor: Raymond Jeffrey Dufty
  • Patent number: 8499849
    Abstract: A roller cleaning assembly for a grass processing apparatus, such as a grass or turf roller, has a roller housing releasably mountable in a hollow cavity in the body of a smoothing head, where the smoothing head contains idler or smoothing rollers. A pair of roller brushes is rotatably journalled in the roller housing, and are driven by the idler or smoothing rollers via friction drive rollers. Each brush roller has at least one spiral brush and/or spiral wiper blade to clean the external surfaces of the adjacent idler or smoothing rollers and deposits the clippings or other waste in collector sections in the roller housing.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: August 6, 2013
    Assignee: Tru-Turf Pty Ltd.
    Inventor: Raymond Jeffrey Dufty
  • Patent number: 7997826
    Abstract: A roller assembly adapted to follow ground contours during operation which includes a pair of roller components each having respective inner ends connected to each other by a flexible and movable primary coupling and having their respective outer ends connected to a support shaft which extends through a hollow interior of each roller component by a secondary coupling.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: August 16, 2011
    Assignee: Tru-Turf Pty Ltd
    Inventor: Raymond Jeffrey Dufty
  • Patent number: 7934886
    Abstract: Rolling apparatus for rolling of turf or grass surfaces is provided which includes a mobile main frame (11) and at least three undercarriages (61, 62, 63) attached to the main frame (11). Each undercarriage has one or more smoothing rollers (64) in the form of idler rollers; there is further provided a control frame for each of the undercarriages (61, 62, 63) pivotally mounted to each undercarriage with one (63) of the at least three undercarriages located rearwardly or forwardly of the other two (61, 62) undercarriages in a direction of travel of the rolling apparatus. In the direction of travel, each undercarriage is located adjacent to each other presenting substantially no gaps in a front view between adjoining undercarriages or smoothing rollers attached to the undercarriages.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: May 3, 2011
    Assignee: Tru Turf Pty Ltd
    Inventor: Raymond Jeffrey Dufty
  • Publication number: 20090238644
    Abstract: A roller assembly adapted to follow ground contours during operation which includes a pair of roller components each having respective inner ends connected to each other by a flexible and movable primary coupling and having their respective outer ends connected to a support shaft which extends through a hollow interior of each roller component by a secondary coupling.
    Type: Application
    Filed: May 1, 2009
    Publication date: September 24, 2009
    Applicant: TRU-TURF PTY LTD
    Inventor: Raymond Jeffrey Dufty
  • Publication number: 20090129865
    Abstract: Rolling apparatus for rolling of turf or grass surfaces is provided which includes a mobile main frame (11) and at least three undercarriages (61, 62, 63) attached to the main frame (11). Each undercarriage has one or more smoothing rollers (64) in the form of idler rollers; there is further provided a control frame for each of the undercarriages (61, 62, 63) pivotally mounted to each undercarriage with one (63) of the at least three undercarriages located rearwardly or forwardly of the other two (61, 62) undercarriages in a direction of travel of the rolling apparatus. In the direction of travel, each undercarriage is located adjacent to each other presenting substantially no gaps in a front view between adjoining undercarriages or smoothing rollers attached to the undercarriages.
    Type: Application
    Filed: February 8, 2007
    Publication date: May 21, 2009
    Inventor: Raymond Jeffrey Dufty
  • Patent number: 6840543
    Abstract: There is provided a trailer (65) having a trailer frame (68) supported by ground engaging wheels (84). A pivot frame (69) is pivotally attached to the trailer frame (68) by pivot attachment means (72). The pivot frame (69) is attachable to maintenance apparatus such as a mower (100) in use. There is also provided connection means such as a drawbar (70) to a prime mover.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: January 11, 2005
    Assignee: Forestfield PTY Ltd.
    Inventor: Raymond Jeffrey Dufty
  • Patent number: 6712155
    Abstract: Carriage (10) attachable to a prime mover (41) for travel over turf or grass wherein the carriage (10) has idler rollers (12, 13 and 14) and a ground aeration mechanism in the form of a support axle (15) having a plurality of slicer blades (16) attached thereto. There is also provided a housing (11) having a hollow interior (33) which houses rollers (12, 13 and 14) and ground aeration mechanism (15 and 16). In use, when carriage (10) travels over turf or grass, both rollers (12, 13 and 14) and the ground aeration mechanism (15 and 16) operate simultaneously to not only roll the grass but also slice it for the purpose of facilitating moisture penetration.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: March 30, 2004
    Assignee: Forestfield Pty. Ltd.
    Inventor: Raymond Jeffrey Dufty
  • Patent number: 6460624
    Abstract: Ground aeration apparatus (10) having a main frame (11) which has one or more ground contacting rollers in the form of a main drive roller (22) and a plurality of smoothing rollers (13, 14, 15) mounted to an undercarriage (12) attached to the underside of the main frame (11). There is also provided a slicing mechanism (25) which comprises spaced cutters (31, 32) mounted to a support axle (30). In use, a grass surface may be subjected to a rolling or smoothing operation as well as an aeration operation.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: October 8, 2002
    Inventor: Raymond Jeffrey Dufty
  • Patent number: 6457903
    Abstract: Rolling apparatus for rolling of turf or grass surfaces including a mobile main frame (11) and one or more undercarriages (45, 46) attached to the main frame (11) wherein the or each undercarriage has one or more smoothing rollers (45A, 46A) and there is further provided a control (62) pivotally attached to the main frame (11) wherein the or each undercarriage is pivotally attached to the control such that, in use, the or each smoothing roller closely follows ground contours.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: October 1, 2002
    Inventor: Raymond Jeffrey Dufty
  • Publication number: 20020109345
    Abstract: There is provided a trailer (65) having a trailer frame (68) supported by ground engaging wheels (84). A pivot frame (69) is pivotally attached to the trailer frame (68) by pivot attachment means (72). The pivot frame (69) is attachable to maintenance apparatus such as a mower (100) in use. There is also provided connection means such as a drawbar (70) to a prime mover.
    Type: Application
    Filed: December 26, 2001
    Publication date: August 15, 2002
    Inventor: Raymond Jeffrey Dufty