Patents by Inventor George S. Polan

George S. Polan 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: 5579846
    Abstract: Ceiling sprinklers and sprinkler systems provide extended areas of coverage through a combination of extra large and super large orifices and deflectors which extend radial distributions with acceptable uniform average and absolute distribution densities all around and beneath the sprinklers. Described deflectors are circular and substantially flat, being essentially flat in pendent style and slightly fructoconical in upright style. Slots of alternating length are provided extending inwardly towards the center of the deflector from the circular perimeter to within no more than one-half inch and preferably no more than 0.6 of an inch from the center of the deflector. The upright sprinkler deflector includes central circular planar areas at least one inch and preferably at least 1.2 inch in diameter while the outer annular peripheral portion of such deflectors are coned back towards their supporting tubular bodies at an included cone angle of about one hundred forty degrees or more.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: December 3, 1996
    Assignee: Central Sprinkler Corporation
    Inventors: George G. Meyer, Stephen J. Meyer, George S. Polan
  • Patent number: 5494113
    Abstract: An automatic sprinkler includes a sprinkler body having a fluid passage outlet. A valve plug is maintained in sealing engagement with the fluid passage outlet by one or more control levers which react against the sprinkler body. Each control lever is held in position by a temperature-responsive actuator made from a generally C-shaped band of shape-memory alloy. The control band may be rigidly secured to one of the control levers. Upon an occurrence of a high-temperature condition, opposed ends of the control band spread apart in a common plane, releasing all control levers thereby permitting all control levers to pivot relative to the sprinkler body and release the valve plug from sealing engagement with the fluid passage outlet.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: February 27, 1996
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 5366022
    Abstract: Ceiling sprinklers and sprinkler systems provide extended areas of coverage through a combination of extra large and super large orifices and deflectors which extend radial distributions with acceptable uniform average and absolute distribution densities all around and beneath the sprinklers. Described deflectors are circular and substantially flat, being essentially flat in pendent style and slightly fructoconical in upright style. Slots of alternating length are provided extending inwardly towards the center of the deflector from the circular perimeter to within no more than one-half inch and preferably no more than 0.6 of an inch from the center of the deflector. The upright sprinkler deflector includes central circular planar areas at least one inch and preferably at least 1.2 inch in diameter while the outer annular peripheral portion of such deflectors are coned back towards their supporting tubular bodies at an included cone angle of about one hundred forty degrees or more.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: November 22, 1994
    Assignee: Central Sprinkler Corporation
    Inventors: George G. Meyer, Stephen J. Meyer, George S. Polan
  • Patent number: 5097906
    Abstract: A concealed frame-type automatic sprinkler with adjustable cover is provided by a sprinkler with a sprinkler body, an outlet on one side of the sprinkler body, a frame which extends from the body completely around the outlet, a plug retained in the outlet by a heat-sensitive element, and a pair of spring clips retained on the sprinkler by an adjustment screw passed through the frame to preload the heat-responsive element against the plug. The clip members are diametrically opposed and extend radially outwardly on either side of the frame. Each includes a pair of arms with tabs sized and positioned to engage with ribs provided on an inner cylindrical surface to a central cylindrical bracket member provided on an inner side of the cover. A gauge bracket may be mounted on the sprinkler to assure a deflector of the sprinkler is located at a proper height with respect to the ceiling through which the sprinkler extends.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: March 24, 1992
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 5094298
    Abstract: A fire sprinkler apparatus comprises a tubular body, a valve and a locking mechanism, the tubular body having a longitudinal axis and a conduit extending therethrough and being connectable to a supply of pressurized fire extinguishing fluid. The conduit has an annular groove proximate the outlet end of the tubular body, the valve forming a fluid-tight seal proximate the outlet end in a closed position and being completely separable from the fire sprinkler apparatus. The locking mechanism being supported by the tubular body for limited movement between an engaged position and a disengaged position, the locking mechanism comprising a housing, a plurality of locking balls moveable toward and away from the annular groove, a locking disc and temperature responsive means.
    Type: Grant
    Filed: December 12, 1989
    Date of Patent: March 10, 1992
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 5083616
    Abstract: A fork type ceiling sprinkler includes a sprinkler body and a fork coupled to an outlet end of the sprinkler body. The fork has a pair of arms extending away from an outlet end of the body. Free end portions of the arms define a gap aligned with an outlet of the sprinkler body. A plug is releasably retained in the outlet by a pair of levers extending from the plug to sloping surfaces provided by bosses on the inner sides of the two fork arms. A temperature-sensitive element between the levers prevents the levers from sliding off sloping arms until the sprinkler is activated. A stamped deflector plate is supported on pins slidably mounted through the fork arms. A cup is adjustably mounted through bracket arms to the sprinkler on the outside of the fork arms that support the deflector.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: January 28, 1992
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 5080176
    Abstract: A sprinkler cover is provided including a ceiling member and a pair of identical bracket members which are soldered to the ceiling member for thermal release. Each of the bracket members includes one or more upright arms. Each arm includes one or more cut tabs which constitute a separate member to engage with a deflector on a conventional fixed frame or drop-type pendent or ceiling sprinkler or with an arm supporting such deflector from the sprinkler body. The tabs are spaced at various heights from the base of the ceiling member to permit the cover to be mounted at adjustable heights on the deflector or the arms of the sprinkler. Frame-type sprinklers may be modified by the provision of one or more complementary engagement structures on one or both arms to engage one or a plurality of the bracket tabs.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: January 14, 1992
    Assignee: Central Sprinkler Corporation
    Inventors: George S. Polan, George Meyer
  • Patent number: 4991656
    Abstract: In a quick release valve for a sprinkler head, a valve seat includes an annular stop member spaced outwardly from a fluid passage outlet having an annular beveled surface spaced outwardly from the outlet. A sealing member is seated in the valve seat. A resiliently flexible valve disk has a peripheral flange portion which is turned over the sealing member and rests against the beveled surface. The beveled surface prevents outward radial movement of the peripheral flange portion. A rigid, frangible, thermal, responsive element resiliently deflects the valve disk so as to compress the sealing member and seal the outlet.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: February 12, 1991
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 4976320
    Abstract: A concealed sprinkler with drop down deflector assembly includes a pair of frame arms which resemble a tuning-fork, there being a gap between the free end portions of the arms. As a result, the arms are not subject to assembly loads or system pressure loads. The drop down deflector assembly is mounted on the end portions of the arms. A preferred valve assembly includes a valve and a compound lever arrangement for holding a rigid thermal responsive element, such as a frangible glass bulb, and for adjusting compressive pre-load on the valve without loading the frame arms.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: December 11, 1990
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 4957169
    Abstract: A sprinkler valve assembly comprising a single thermal responsive element and two or more support pins arranged with respect to a central axis so that the thermal responsive element is supported under axial compressive load substantially without thermal obtrusion by said support pins at substantially all orientations of the assembly with respect to its central axis.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: September 18, 1990
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 4926946
    Abstract: A pendent style sprinkler includes a sprinkler body portion and a plug valve assembly having a sleeve secured to a deflector plate on an outlet side of the sprinkler body portion. A clip is wedged between the sprinkler body portion and the deflector plate. The clip includes a peripheral edge or tab portion projecting radially outwardly beyond a peripheral portion of the sprinkler body portion and a peripheral portion of the deflector plate. A ceiling cover is provided having a central portion adapted to contact the clip peripheral edge portion such that the cover is suspended at the central portion on the peripheral edge portion of the clip.
    Type: Grant
    Filed: November 8, 1988
    Date of Patent: May 22, 1990
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 4854342
    Abstract: A clapper seal for a dry pipe valve wherein a disc-shaped, resilient, compressible sealing gasket is secured to the clapper valve body by an annular, metallic washer. The washer is disposed between inner and outer sealing rings or beads formed on the underside of the gasket. The sealing rings are generally circular and cross-section, thereby minimizing surface contact with the air and water ring seats. The axial thickness and radial dimension of the washer are such that the washer contacts the air and water rings creating a metal-to-metal seal, and preventing further deformation of the sealing rings, upon over-compression or long-term compressive set of the gasket.
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: August 8, 1989
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 4830115
    Abstract: A valve assembly for use in a sprinkler head comprising a valve seat having a generally frusto-conical surface configuration and an annular rib, a flanged valve member in sealing engagement with said annular rib and having a depending, radially inwardly spaced surface which in cooperation with said annular rib and surface configuration forms a partially enclosed space in which a resilient O-ring is captively held in compressive engagement between the valve seat and valve member.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: May 16, 1989
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 4739835
    Abstract: A sprinkler head having a body portion with a fluid outlet port closed by a valve member retained in the closed position by a bulb of frangible material having three or more planar sides of uniform thickness and containing a heat-expansible fluid, the end of the bulb remote from the valve being supported by a deflector plate formed as part of a vertically adjustable three strut yoke depending from said body portion.
    Type: Grant
    Filed: June 23, 1986
    Date of Patent: April 26, 1988
    Assignee: Central Sprinkler Corp.
    Inventors: George S. Polan, Hermann R. Glinecke
  • Patent number: 4732216
    Abstract: Quick release mechanism for a sprinkler head includes a latch assembly for holding the valve in sealing engagement over an outlet orifice. The assembly comprises a generally U-shaped ejection plate pivotally mounted between the sprinkler head frame and valve in canted relation to the center line of the sprinkler head, and a thermal responsive element mounted between the sprinkler frame and valve-holding end of the ejection plate. The thermal responsive element contains a pellet of fusible alloy and a ceramic bearing slug and glass ball to hold the element between the ejection plate and sprinkler head frame in order to optimize the response time. The whole pellet housing with its heat fins is effectively insulated from the rest of the latch assembly by the glass ball and an insulator sleeve at its extremities. When the alloy melts, the ceramic slug and glass ball drop downwardly, destabilizing the latch assembly and thereby permitting fluid pressure to blow the seal at the outlet orifice.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: March 22, 1988
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan
  • Patent number: 4711099
    Abstract: The present invention is directed to a portable quick chilling device. A compressor is affixed to a base. A condenser is operatively connected to the compresser. A fan is provided for blowing air across the condenser. An accumulator is operatively connected to the condenser. A capillary tube (expansion valve) is operatively connected to the accumulator. The capillary tube is operatively connected to an evaporator. The evaporator is operatively connected to the compressor. The evaporator is a coil of tubing. Each ring of the coil is in contact with an adjacent ring. An inwardly facing surface of each ring is flattened. The capillary tube enters the coil where said evaporator is operatively connected to the compressor. The tube passes within the coil. The free end of the tube is bent to point back down the coil. The device cools a 12 ounce beverage can from about 75.degree. F. to about 45.degree. F. in about 4 minutes.
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: December 8, 1987
    Assignee: Central Sprinkler Corporation
    Inventors: George S. Polan, Hermann R. Glinecke
  • Patent number: D318096
    Type: Grant
    Filed: September 27, 1988
    Date of Patent: July 9, 1991
    Assignee: Central Sprinkler Corporation
    Inventor: George S. Polan