Patents by Inventor Grantlin W. Crider

Grantlin W. Crider 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: 5221180
    Abstract: A unitized metallic fan housing having a peripheral wall spaced about a fan's axis of rotation and extending axially therebeyond. A plurality of flanges are integrally connected to and extend substantially perpendicular to the peripheral wall toward the axis of rotation. At least one screen is connected to the flanges by rigid but malleable tabs formed thereon that are bent around a peripheral strand of the screen. Apertures are defined by and extend through the flanges to provide access to the tabs such that the tabs may be urged toward the peripheral wall to tension the screen therewithin, whereby the rigid nature of the tabs secures the screen to the flanges in a tensioned position. Holes are defined by and extend through the peripheral wall to provide access to the tabs such that the tabs may be urged from the peripheral wall to reduce the tension of the screen and to disengage the peripheral strand from the tabs such that the screen may be removed from the peripheral wall and replaced.
    Type: Grant
    Filed: July 22, 1992
    Date of Patent: June 22, 1993
    Assignee: Hired Hand Manufacturing, Inc.
    Inventor: Grantlin W. Crider
  • Patent number: 4605162
    Abstract: A ventilator opener for a livestock house having an electrically powered fan for ventilation utilizes a tubular electrical heater, connected to the same power source as the fan, to heat an expandable bi-metallic latch finger which thereby engages the inner surface of the tubular heater. The latch finger is operatively connected to a conventional winch which is used to lower at least one closure or curtain thereby uncovering one or more screened ventilation openings along the walls of the house. The latch finger secures the winch with the curtains in their closed positions while the finger is engaged by the heater. The latch finger is released from engagement with the tubular heater by cooling of the heater and latch finger subsequent to either electrical power failure or an excessive temperature within the livestock house, thereby releasing the winch and opening the ventilation openings.
    Type: Grant
    Filed: January 2, 1985
    Date of Patent: August 12, 1986
    Inventor: Grantlin W. Crider