Patents Assigned to Rosedale Products
  • Patent number: 12121831
    Abstract: A filter element includes an inner filter basket including an elongated tubular portion having a first open end and a first closed end. The tubular portion defines a plurality of perforations therethrough. An outer surface of the tubular portion is seamless. A first annular brim extends outwardly from the open end of the tubular portion. The filter element also includes an outer filter basket having a second open end in which the inner filter basket is received. A second annular brim extends outwardly from the second open end of the outer filter basket. The fabric filter bag is disposed between the inner filter basket and the outer filter basket.
    Type: Grant
    Filed: January 9, 2024
    Date of Patent: October 22, 2024
    Assignee: Rosedale Products
    Inventors: Jose Ignacio Paz, Dennis Miles Findley, Mark Andrew Lunde
  • Patent number: 11904261
    Abstract: A filter assembly includes an inner filter basket comprising an elongated tubular portion having a first open end and a first closed end. The tubular portion defines a plurality of perforations therethrough. An outer surface of the tubular portion is seamless. A first annular brim extends outwardly from the open end of the tubular portion. The filter assembly also includes an outer filter basket having a second open end in which the inner filter basket is received. A second annular brim extends outwardly from the second open end of the outer filter basket. The first and second brims are configured to retain a fabric filter bag between the inner filter basket and the outer filter basket.
    Type: Grant
    Filed: January 3, 2022
    Date of Patent: February 20, 2024
    Assignee: Rosedale Products
    Inventors: Jose Ignacio Paz, Dennis Miles Findley, Mark Andrew Lunde
  • Patent number: 8371453
    Abstract: A liquid filter, with a housing inlet port and outlet port arranged at the bottom of the liquid filter. The liquid filter may also be configured with an inward projecting domed top cover and/or an eccentric septum plate supporting a desired filter element and/or filter basket. The inward projecting domed top cover configurable with respect to the septum plate to retain the desired filter element and/or filter basket in place when in a closed position.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: February 12, 2013
    Assignee: Rosedale Products, Inc.
    Inventor: Nils N. Rosaen
  • Patent number: 5462678
    Abstract: A filter device including means to produce an air actuated purge for backwashing a filter assembly including a double sieve basket having a flexible filter between the double baskets. The backwash removes caked contaminant from the filter and baskets. The purge uses only the quantity of liquid in the housing and a blast of air to backwash the filter. The pressurized air causes roiling of the liquid and accelerates the blowing through the sieve baskets and flexible filter for the backwash to remove and loosen the contaminants. The air which follows the liquid through the filter assembly further loosens and then removes the remainder of the contaminants.
    Type: Grant
    Filed: January 6, 1993
    Date of Patent: October 31, 1995
    Assignee: Rosedale Products, Inc.
    Inventor: Borje O. Rosaen
  • Patent number: 5176826
    Abstract: A vibrating sieving unit for insertion into a housing to form a sieving filter. The vibrator directly vibrates the sieving cylinder reducing the buildup of filter cake for improved performance. A unique cleaning-in-place system is presented utilizing the fluid being filtered as the purging liquid. An alternate purge construction is also provided for use if the first purge route is blocked.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: January 5, 1993
    Assignee: Rosedale Products, Inc.
    Inventor: Borje O. Rosaen
  • Patent number: 5128032
    Abstract: A vibrating sieving unit for insertion into a housing to form a sieving filter. An air pressure operated vibrator directly vibrates the sieving cylinder to reduce the buildup of filter cake for improved performance. Tuning bars connected between the cover and the vibrator are structurally matched to the fluid being filtered and to the particular vibrating assembly to create a harmonic vibration and to thereby achieve a consistent, maximum vibration at a given, readily maintainable air pressure.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: July 7, 1992
    Assignee: Rosedale Products, Inc.
    Inventor: Borje O. Rosaen
  • Patent number: 4701259
    Abstract: A fluid filter includes a housing having a fluid inlet, a fluid outlet, and an open top filter chamber intermediate the inlet and the outlet. The filter chamber is adapted to receive a filter basket holding a filter bag therein. The filter basket is supported in the filter chamber by the bottom end of the basket which engages an inwardly radiused wall portion of the housing. The basket includes a support plate for supporting the bottom of the filter bag within the basket above the bottom end portion of the basket. The lower end of the basket beneath the plate includes a wall portion which can be modified to conform to the shape of the housing to stably support the filter basket in a fixed position within the filter chamber.
    Type: Grant
    Filed: March 27, 1986
    Date of Patent: October 20, 1987
    Assignee: Rosedale Products, Inc.
    Inventor: Nils N. Rosaen
  • Patent number: 4485844
    Abstract: A back pressure inducer and check valve is disclosed for use with a fluid system having inlet passageway, an outlet passageway and in which fluid flows from the inlet and to the outlet passageway. The back pressure inducer comprises a valve seat secured to the system and having a fluid port fluidly between the inlet and outlet passageways. A valve member is movable between a closed and open position to variably open the fluid port while a spring urges the valve member towards its closed position. Cooperating conical surfaces on the valve member and valve seat form an annular passageway when the valve member is in its open position to produce controlled pressure drops between the inlet and outlet conduit over a wide range of fluid flow rates.
    Type: Grant
    Filed: April 23, 1982
    Date of Patent: December 4, 1984
    Assignees: Borje O. Rosaen, Rosedale Products, Inc.
    Inventors: Henry A. Vander Kaay, Borje O. Rosaen