Patents by Inventor Donald Joseph Legatt

Donald Joseph Legatt 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: 6427285
    Abstract: A floor scrubber (10) is disclosed including a drive lug (62) for removably connecting a scrubbing member (64) to a drive (60) and having a trough for receipt and catching of solution for passage to the surface. The mount (58) for the drive (60) is biased by a spring (67) to pivot relative to a linkage plate (46) in turn pivotably mounted to the chassis (12) at an acute angle to the forward movement direction. The vacuum assembly (92) is sandwiched in a socket (100) formed in the bottom wall of a recovery tank (90) by a mount (106) to deaden the sound generated thereby and to allow air communication is inside of the socket (100) but generally preventing entry of solution therein. The squeegee assembly (152) is biased by a gas spring (150) to engage the surface at a constant force independent of the pivotal position of the squeegee mount (148).
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: August 6, 2002
    Assignee: Nilfisk-Advance, Inc.
    Inventors: Donald Joseph Legatt, Kurt M. Vetse, Galen M. Swenson
  • Publication number: 20010019935
    Abstract: A riding burnishing machine (10) includes a battery pack positioned as low as possible in the chassis (12) between the front and rear wheels (14, 15) and removable in a horizontal movement direction while supported by the bottom by a pallet jack. A steering system includes steering shafts (58, 76) which are rotatable together while allowing relative pivotable movement therebetween and which are rotatably connected to the spindle (38) of the steerable rear wheels (15) through a jack shaft (44). The burnishing head is raised and lowered relative to the floor surface by an electric actuator (104) which pivots a linkage (92) through a connection allowing floating travel. The pressure which the treating member (16) engages the floor surface is controlled in response to the current level of the electric motor (86) which rotates the treating member (16).
    Type: Application
    Filed: May 7, 2001
    Publication date: September 6, 2001
    Inventors: Donald Joseph Legatt, Kipp W. Knutson
  • Patent number: 6227957
    Abstract: A riding burnishing machine (10) includes a battery pack positioned as low as possible in the chassis (12) between the front and rear wheels (14, 15) and removable in a horizontal movement direction while supported by the bottom by a pallet jack. A steering system includes steering shafts (58, 76) which are rotatable together while allowing relative pivotable movement therebetween and which are rotatably connected to the spindle (38) of the steerable rear wheels (15) through a jack shaft (44). The burnishing head is raised and lowered relative to the floor surface by an electric actuator (104) which pivots a linkage (92) through a connection allowing floating travel. The pressure which the treating member (16) engages the floor surface is controlled in response to the current level of the electric motor (86) which rotates the treating member (16).
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: May 8, 2001
    Assignee: Nilfisk-Advance, Inc.
    Inventors: Donald Joseph Legatt, Kipp W. Knutson
  • Patent number: 6148476
    Abstract: A floor scrubber (10) is disclosed including a drive lug (62) for removably connecting a scrubbing member (64) to a drive (60) and having a trough for receipt and catching of solution for passage to the surface. The mount (58) for the drive (60) is biased by a spring (67) to pivot relative to a linkage plate (46) in turn pivotably mounted to the chassis (12) at an acute angle to the forward movement direction. The vacuum assembly (92) is sandwiched in a socket (100) formed in the bottom wall of a recovery tank (90) by a mount (106) to deaden the sound generated thereby and to allow air communication inside of the socket (100) but generally preventing entry of solution therein. The squeegee assembly (152) is biased by a gas spring (150) to engage the surface at a constant force independent of the pivotal position of the squeegee mount (148).
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: November 21, 2000
    Assignee: Nilfisk-Advance, Inc.
    Inventors: Donald Joseph Legatt, Kurt M. Vetse, Galen M. Swenson
  • Patent number: 5829095
    Abstract: A floor scrubber (10) is disclosed including a drive lug (62) for removably connecting a scrubbing member (64) to a drive (60) and having a trough for receipt and catching of solution for passage to the surface. The mount (58) for the drive (60) is biased by a spring (67) to pivot relative to a linkage plate (46) in turn pivotably mounted to the chassis (12) at an acute angle to the forward movement direction. The vacuum assembly (92) is sandwiched in a socket (100) formed in the bottom wall of a recovery tank (90) by a mount (106) to deaden the sound generated thereby and to allow air communication inside of the socket (100) but generally preventing entry of solution therein. The squeegee assembly (152) is biased by a gas spring (150) to engage the surface at a constant force independent of the pivotal position of the squeegee mount (148).
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: November 3, 1998
    Assignee: Nilfisk-Advance, Inc.
    Inventors: Donald Joseph Legatt, Kurt M. Vetse, Galen M. Swenson