Patents by Inventor Stanley H. Frederick

Stanley H. Frederick 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: 4944887
    Abstract: A fluid filter is disclosed which includes a casing defining a fluid chamber with inlet and outlet apertures to and from the chamber to respectively conduct unfiltered fluid to the chamber and filtered fluid from the chamber. A flow path is defined within the chamber and a filter is interposed in the flow path substantially normal to the direction of flow of the fluid in the chamber. The filter includes a screen having a covering of a filter aid, such as diatomaceous earth, on an upstream side of the screen. The filter is regenerated by reciprocating the screen relative to the casing in a path corresponding to the path defined by the direction of flow.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: July 31, 1990
    Assignee: Essef
    Inventor: Stanley H. Frederick
  • Patent number: 4705629
    Abstract: A distinct element employed in a preferred embodiment of the invention resides in a two-compartment filter unit that extends operating life by permitting the function of the first compartment filtration to be transferred to the other compartment when the first compartment is clogged.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: November 10, 1987
    Assignee: Wexco Incorporated
    Inventors: Donald H. Weir, Stanley H. Frederick, Robert A. Hotaling, Ronald B. Robol
  • Patent number: 4661247
    Abstract: A modular prefabricated filter/circulating system for in-ground swimming pools is provided. The swimming pool circulation system which serves to filter and circulate pool water is designed to be prefabricated at the factory and carried to the swimming pool site as a package and installed on the swimming pool wall so that one side wall of the prefabricated package becomes an integral part of the swimming pool wall. The system is provided with a skimmer with streamlined faceplate, main drain, skimmer filter, main drain filter, skimmer throttle valve, quick connect from filter to pump and return, pump, automatic safety pump shutoff, high efficiency pool returns and automatic pool sweep pressure increase mechanism. The system is designed to avoid conventional piping and trenches therefor normally associated with conventional swimming pool filtration systems. The system affords substantial energy saving and is more reliable and safer.
    Type: Grant
    Filed: February 6, 1986
    Date of Patent: April 28, 1987
    Assignee: Fox Industries Incorporated
    Inventors: Donald H. Weir, Stanley H. Frederick, Robert A. Hotaling, Ronald B. Robol
  • Patent number: 4545906
    Abstract: A swimming pool filtering system of the closed recirculatory type having a series connected strainer, pump and filter is provided with a close coupled pump drive motor having two sets of stator windings for allowing the selection of one of two water circulation rates to achieve more efficient pool water maintenance. A specific circulation rate may be manually selected or periods of selected circulation rates may be automatically programmed using a motor stator that is energized through a timer. Reduced pump speed during periods of little or no use results in substantial energy savings and a reduction of noise pollution during evening hours.
    Type: Grant
    Filed: August 2, 1983
    Date of Patent: October 8, 1985
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Stanley H. Frederick
  • Patent number: 4421643
    Abstract: A swimming pool filtering system of the closed recirculatory type having a series connected strainer, pump and filter is provided with a close coupled pump drive motor having two sets of stator windings for allowing the selection of one of two water circulation rates to achieve more efficient pool water maintenance. A specific circulation rate may be manually selected or periods of selected circulation rates may be automatically programmed using a motor stator that is energized through a timer. Reduced pump speed during periods of little or no use results in substantial energy savings and a reduction of noise pollution during evening hours.
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: December 20, 1983
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Stanley H. Frederick
  • Patent number: 4330412
    Abstract: A hydrotherapy device, such as a spa, whirlpool or jet stream exerciser is connected to a closed water circulation loop having a drain, a pump, a heater, a filter, a valve controlled filter bypass and injection nozzles. The pump is equipped with a close-coupled drive motor having two sets of stator windings for allowing the selection of one of two motor speeds to achieve improved operation and greater efficiency of the hydrotherapy device. A low motor speed is selected during periods of non-use, at which time the filter device is connected into the circulation loop so that a low water circulation rate is provided in order to maintain purity of the water. During periods of use, a higher motor speed is selected and the filter is bypassed to provide a high water circulation rate and high velocity water injection into the hydrotherapy device. Reduced motor speed during periods of non-use results in substantial energy savings and a reduction in the noise generated by the device.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: May 18, 1982
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Stanley H. Frederick