Patents by Inventor John L. Haas

John L. Haas 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).

  • Mechanism for gripping and rotating pipe, including plastic covered pipe
    Patent number: 6439087
    Abstract: Plastic surface pipe rotary drive apparatus, comprising in combination a drive rotor rotatable about a central axis; a set of jaws spaced about a central axis, and operatively connected to a rotor to rotate about parallel jaw axes in response to rotation of the drive rotor, the jaws having work engaging surfaces extending eccentrically relative to their respective jaw axes; and each of the surfaces extending generally circularly about a locus offset from a jaw axis associated with the surfaces.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: August 27, 2002
    Assignee: Rothenberger USA, Inc.
    Inventor: John L. Haas
  • Collapsible carrier stand for heavy machine
    Patent number: 4728118
    Abstract: A collapsible carrier for a heavy machine, has(a) an upper platform adapted to support the machine,(b) first leg structure pivotally attached to the platform and extending downwardly and forwardly relative to the platform,(c) second leg structure having upper extent located to support the platform and extending downwardly and rearwardly relative to the platform,(d) the first and second leg structures pivotally interconnected below the level of the platform,(e) there being a slide surface associated with the platform and presented to transmit loading to the second leg structure upper extent as that upper extent travels therealong between first and second positions corresponding to raised and lowered positions of the platform and there being stops associated with the platform to limit such travel at the first and second positions,(f) releasable mechanism to lock the second leg structure upper extent to the platform at the first and second positions,(g) and a counterbalance operatively connected with said first
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: March 1, 1988
    Assignee: Roco Tool Group, Inc.
    Inventor: John L. Haas
  • Collapsible carrier stand for heavy machine
    Patent number: 4611823
    Abstract: A collapsible carrier for a heavy machine, comprising(a) an upper platform adapted to support the machine,(b) first leg structure pivotally attached to the platform and extending downwardly and forwardly relative to the platform,(c) second leg structure having upper extent located to support the platform and extending downwardly and rearwardly relative to the platform,(d) the first and second leg structures pivotally interconnected below the level of said platform,(e) there being a slide surface associated with the platform and presented to transmit loading to the second leg structure upper extent as said upper extent travels therealong between first and second positions corresponding to raised and lowered positions of the platform, and there being stops associated with the platform to limit such travel at the first and second positions,(f) releasable mechanism to lock the second leg structure upper extent to the platform at the first and second positions,(g) and a counterbalance operatively connected with sa
    Type: Grant
    Filed: February 11, 1985
    Date of Patent: September 16, 1986
    Assignee: Roco Tool Group, Inc.
    Inventor: John L. Haas