Patents by Inventor Thomas A. Craig

Thomas A. Craig 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: 4899987
    Abstract: The scissor lift has two parallel sets of legs. Each set has one end of an inner leg pivoted on a base and the other end slideable on the elevating platform. One end of the outer leg of each set is pivotally connected to the platform while the other end slides on the base. The mid portion of the legs are pivotally connected on a pin which also supports a crank which can rotate about 90.degree. between a first generally horizontal position in which the actuated end of the crank is eccentric to an imaginary line connecting the pivot pin and the pivot of a ram which actuates the end of the crank. Initial actuation of the crank 90.degree. raises the pivot pin and the actuated end of the crank to increase the mechanical advantage of the ram. The angle of the ram now has adequate uplift to be as effective as the prior art while requiring about 1/2 the storage height. A stop bar is pivoted on the pivot pin and has a free end or tail slideable along the base as the pivot pin rises.
    Type: Grant
    Filed: December 8, 1988
    Date of Patent: February 13, 1990
    Assignee: Hein-Werner Corporation
    Inventor: Thomas A. Craig
  • Patent number: 4594487
    Abstract: A mounting arrangement for supporting a proximity sensing means such as a reed type proximity switch contiguous the outer peripheral surface of a fluid power cylinder, in which said fluid power cylinder is of the type comprising a cylinder body and a piston axially movable in said cylinder body, and in which said fluid power cylinder includes a pair of oppositely disposed end closure members respectively positioned at each of the respective opposite ends of said cylinder body and tie rod means connecting said oppositely disposed end closure members. The mounting arrangement comprises a sensing means support device adapted to be detachably mounted on the fluid power cylinder.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: June 10, 1986
    Assignee: Galland Henning Nopak, Inc.
    Inventors: Roman Grassl, Thomas A. Craig, Eric P. Weil
  • Patent number: 4279269
    Abstract: In a gas-liquid receptacle that holds liquid in contact with pressure gas and has a concentric liquid port in its flat bottom wall, liquid inflow is controlled, to prevent foam generation, by a baffle disc and a screen, both over the liquid port. The baffle disc, which diverts liquid entering the liquid port into decelerating radially outward flow, is at least as big as the liquid port but small enough to be well spaced from the side wall of the receptacle, and it is spaced above the bottom wall by a distance preferably equal to 3/8 of the liquid port diameter. The screen extends entirely across the receptacle and is spaced above the baffle disc by a distance preferably about 50% greater than the distance from the bottom wall to the baffle disc.
    Type: Grant
    Filed: November 21, 1979
    Date of Patent: July 21, 1981
    Assignee: Milwaukee Cylinder Corporation
    Inventors: Richard R. Schink, Thomas A. Craig