Patents Assigned to Dosmatic USA, Inc.
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Patent number: 7438537Abstract: A liquid additive injection pump for injecting a predetermined amount of a secondary fluid into a primary fluid stream wherein a fluid mixing chamber is disposed within the pump housing assembly. A gasket having at least one one-way valve is positioned between the pump assembly components and mixing chamber thereby allowing a primary fluid to pass through the pump assembly and into the mixing chamber where the introduction of a second fluid occurs. The mixed fluids are then discharged through an outlet. The one-way valve gasket assembly acts to prevent the mixed and/or secondary fluid from passing upstream of the gasket assembly and into the pump assembly.Type: GrantFiled: March 9, 2005Date of Patent: October 21, 2008Assignee: Dosmatic USA, Inc.Inventor: Frank A. Walton
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Patent number: 7032760Abstract: An inline backwash, flushing filter assembly comprising a header assembly, a rotatable valve assembly, and a filter element assembly disposed within a filter housing assembly. In operation, the controller moves the turn knob of the rotatable valve assembly a one-quarter turn which results in the reversal of fluid flow through the assembly to periodically back flush the filter utilizing fluid from the system inlet. Debris removed from the filter element during the backwash process are immediately discharged from the system through a drain port. Simultaneously, the hydraulic shearing mechanism of the backwash process dislodges and drains debris which may have accumulated on the screen and at the bottom of the lower filter assembly during normal filter operations. The controller then returns the filter assembly to filtration operation by a reverse one-quarter turn of the turn knob of the rotatable valve assembly.Type: GrantFiled: September 16, 2004Date of Patent: April 25, 2006Assignee: Dosmatic USA, Inc.Inventors: Frank A. Walton, James Allen Mann, Jr., James E. Williams
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Patent number: 7000782Abstract: An inline backwash, flushing filter assembly comprising a header assembly, a rotatable valve assembly, and a filter element assembly disposed within a filter housing assembly. In operation, the controller moves the turn knob of the rotatable valve assembly a one-quarter turn which results in the reversal of fluid flow through the assembly to periodically back flush the filter utilizing fluid from the system inlet. Debris removed from the filter element during the backwash process are immediately discharged from the system through a drain port. Simultaneously, the hydraulic shearing mechanism of the backwash process dislodges and drains debris which may have accumulated on the screen and at the bottom of the lower filter assembly during normal filter operations. The controller then returns the filter assembly to filtration operation by a reverse one-quarter turn of the turn knob of the rotatable valve assembly.Type: GrantFiled: December 5, 2003Date of Patent: February 21, 2006Assignee: Dosmatic Usa, Inc.Inventors: Frank A. Walton, James A. Mann, James E. Williams
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Patent number: 6910405Abstract: Operation of a system for injecting a predetermined amount of a secondary fluid into a primary fluid stream. The system uses a liquid additive injection pump driven by a fluid powered motor that is driven by the primary fluid stream and can be selectively suspended by an on/off switch mechanism. The fluid powered motor includes a housing enclosing a differential pressure piston assembly having a piston movable within housing between upstroke and down stroke positions; a valve mechanism establishing a differential pressure within the housing to produce movement of the piston; an over-center mechanism coupled to the valve mechanism to toggle the valve mechanism between open and closed positions; and an actuating shall coupled to the over-center mechanism.Type: GrantFiled: July 8, 2003Date of Patent: June 28, 2005Assignee: Dosmatic USA, Inc.Inventors: Frank A. Walton, James E. Williams
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Patent number: 6431198Abstract: A pump system for the selected injection of one or more fluids is disclosed where the system generally includes a flow meter including a means to translate the flow rate through the meter to one or more pumps coupled to the meter such that upon a selected introduction of fluid flow through the meter a selected amount of fluid is pumped through the one or more pumps.Type: GrantFiled: October 2, 2001Date of Patent: August 13, 2002Assignee: Dosmatic USA, Inc.Inventors: Frank A. Walton, Edward Grout
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Patent number: 6357466Abstract: A pump system for the selected injection of one or more fluids is disclosed where the system generally includes a flow meter including a means to translate the flow rate through the meter to one or more pumps coupled to the meter such that upon a selected introduction of fluid flow through the meter a selected amount of fluid is pumped through the one or more pumps.Type: GrantFiled: June 7, 1999Date of Patent: March 19, 2002Assignee: Dosmatic USA, Inc.Inventors: Frank A. Walton, Edward Grout
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Patent number: 6254366Abstract: A replaceable seal for a rotor in a rotary fluid machine has a unitary body with integrally formed longitudinal and radial seal portions secured by a friction fit in grooves in the rotor. The longitudinal seal portion includes an outwardly biased seal lip, and an elongated body portion fitting within the groove in the rotor. The elongated body portion has a pair of anchor elements connected by a flat arm element. The radial seal portion has an outwardly biased seal lip, and a retainer post securing the seal in a cavity in the rotor.Type: GrantFiled: June 13, 2000Date of Patent: July 3, 2001Assignee: Dosmatic USA, Inc.Inventors: Frank A. Walton, Edward Grout, James E. Williams
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Patent number: D525685Type: GrantFiled: April 7, 2005Date of Patent: July 25, 2006Assignee: Dosmatic USA, Inc.Inventor: Frank A. Walton
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Patent number: D573620Type: GrantFiled: February 9, 2007Date of Patent: July 22, 2008Assignee: Dosmatic USA, Inc.Inventor: Frank A. Walton
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Patent number: D602512Type: GrantFiled: October 24, 2008Date of Patent: October 20, 2009Assignee: Dosmatic USA, Inc.Inventors: Frank A. Walton, Jay A. Rasmussen
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Patent number: D603427Type: GrantFiled: September 15, 2008Date of Patent: November 3, 2009Assignee: Dosmatic USA, Inc.Inventors: Frank A. Walton, Jay A. Rasmussen
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Patent number: D603435Type: GrantFiled: August 29, 2008Date of Patent: November 3, 2009Assignee: Dosmatic USA, Inc.Inventors: Frank A. Walton, Jay A. Rasmussen