Patents by Inventor Harvey M. Main

Harvey M. Main 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: 5887493
    Abstract: A wrench of the ratchet type which can rotatably advance a first workpiece about a second workpiece in a ratchet condition by angularly moving a handle thereof or in a condition disengaged from the ratchet condition by rotating an end portion of a drive shaft extending from the handle. Additionally, the present invention includes a socket ejection mechanism which is operative with the drive shaft.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: March 30, 1999
    Inventor: Harvey M. Main
  • Patent number: 5005448
    Abstract: A speed wrench and complimentary hand grip, the wrench includes a casing which mounts a standard drive mechanism which has a drive member axially projecting from the casing in order to engage a work piece. The wrench has an added feature in the form of a drive head rigidly attached to the casing axially thereof on a side opposite the drive member. The drive head has parallel exterior sides and an interior axial cavity. Thus, the wrench may be torqued by both a normal auxiliary wrench having a wrench head that engages the exterior sides by a normal lug wrench which has a drive lug that may matably engage the cavity. The complimentary handle includes an annular grip portion and nestably receives the wrench. The hand grip has a cylindrical opening sized to receive the wrench casing and bail, and bail engagement means whereby rotation of the handle rotates the wrench. The opening also allows access to the drive head cavity while the handle and wrench are nested.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: April 9, 1991
    Inventor: Harvey M. Main
  • Patent number: 4807500
    Abstract: A ratchet drive tool includes ratchet head that has a cylindrical aperture and a drive member rotatably mounted in the aperture. The drive member has a drive shaft that projects axially outwardly of the aperture and a pawl support structure oppositely positioned from the drive shaft. The pawl support structure has a flat slide surface oriented in a slide plane parallel to the rotational axis of the drive member. A pawl member has flat surface portions constrained for sliding movement along the slide surface between left and right drive positions wherein left and right ratchet teeth on the pawl member respectively engage longitudinal ratchet teeth on the inner surface of the aperture. The pawl member is radially biased into the selected drive position in relation to the rotational axis by a spring and pin member, and a switch operates to move the pawl member between the left and right drive positions. In an alternate form, two pawl members respectively slide on parallel slide surfaces.
    Type: Grant
    Filed: November 14, 1986
    Date of Patent: February 28, 1989
    Inventor: Harvey M. Main
  • Patent number: 4791837
    Abstract: A speed wrench and complimentary hand grip is provided. The wrench includes a casing which mounts a standard drive mechanism which has a drive member axially projecting from the casing in order to engage a work piece. The wrench has an added feature in the form of a drive head rigidly attached to the casing axially thereof on a side opposite the drive member. The drive head has parallel exterior sides and an interior axial cavity. Thus, the wrench may be torqued by both a normal auxillary wrench having a wrench head that engages the exterior sides by a normal lug wrench which has a drive lug that may mateably engage the cavity. The complimentary handle is in the form of a shell that nestably receives the wrench. The handle has an axial opening sized to receive the drive head whereby rotation of the handle rotates the wrench. The opening also allows access to the drive head cavity while the handle and wrench are nested.
    Type: Grant
    Filed: October 16, 1986
    Date of Patent: December 20, 1988
    Inventor: Harvey M. Main
  • Patent number: 4128025
    Abstract: An improvement in a ratcheting socket wrench wherein an elongated shaft is journalled in the handle and is provided with a knob at the outer end of the handle. The shaft is also reciprocally disposed in the handle where in one position it can be rotated thereby rotating the drive stud for starting or removing loose bolts and the like and in a second position it may be rotated to engage the ratcheting device for drive in either direction.
    Type: Grant
    Filed: August 8, 1977
    Date of Patent: December 5, 1978
    Inventors: Harvey M. Main, Doug Main