Patents Assigned to Griswold Controls Inc
  • Publication number: 20150285385
    Abstract: A rotationally adjustable valve is disclosed whereby the user is able to control the flow of fluids from complete shutoff to maximum flow by rotating the body of the valve, said rotation being axial to the flow of the fluid. Additionally, the user is able to attach high and low pressure test probes directly to the valve, as it is rotatably adjusted, so that additional equipment is not required next to the valve. An embodiment of this invention includes the use of an adjustable Cv disk to set the maximum flow of the valve, rather than just create a simple 180° on/off, very similar to a current 90° ball valve that this device will replace. All of the problems associated with the ball valve have been minimized including creating a linear relationship between the percentage open of the valve and the percentage of maximum flow of the valve.
    Type: Application
    Filed: April 2, 2014
    Publication date: October 8, 2015
    Applicant: Griswold Controls Inc
    Inventors: Stefan Tuineag, Bryan Holloway
  • Patent number: 8100149
    Abstract: A venting probe insertion chamber that is attached to a uniquely designed port which combines the attributes of a probe insertion chamber along with the ability to vent to atmosphere gasses that are present in piping system. This invention combines the functions of two existing products in an economically viable product. This inventive design performs all task required without the need for O-rings or sealing elements present on prior art products. Creating a simpler to manufacture and maintain device that allow for a user to obtain accurate readings of temperature and pressure while using a minimal amount of tooling. The user is able to remove the protective cap while using only a single tool to prevent dislodgement of the product from the associated port. Current state of the art can potentially place a user in harm as accidental dislodgement of their product can occur having only a single operator.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: January 24, 2012
    Assignee: Griswold Controls Inc
    Inventor: David B Keiser
  • Patent number: 7971854
    Abstract: A replaceable valve shaft sealing system is disclosed that enables the operator to greatly reduce the maintenance needs of valves where rotational movement of a shaft, that is connected to the actual metering apparatus of the valve, actuates the opening or closing of the valve thereby regulating fluid flow. The design of the shaft enables the user to replace the valve stem and associated sealing rings or to re-lubricate the shaft, while the valve is connected to the line, by simply removing the packing nut. There are no-preloaded sealing devices that require re-construction. Prior art designs use O-rings to prevent the seepage of fluid into the valve body and though the rotating shaft, but the disclosed shaft prevents contamination of the lubrication into the fluid flow and eliminates any of the axial loads that can cause O-rings to fail using the prior art designs.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: July 5, 2011
    Assignee: Griswold Controls Inc
    Inventor: David B Keiser
  • Publication number: 20090078327
    Abstract: A venting probe insertion chamber that is attached to a uniquely designed port which combines the attributes of a probe insertion chamber along with the ability to vent to atmosphere gasses that are present in piping system. This invention combines the functions of two existing products in an economically viable product. This inventive design performs all task required without the need for O-rings or sealing elements present on prior art products. Creating a simpler to manufacture and maintain device that allow for a user to obtain accurate readings of temperature and pressure while using a minimal amount of tooling. The user is able to remove the protective cap while using only a single tool to prevent dislodgement of the product from the associated port. Current state of the art can potentially place a user in harm as accidental dislodgement of their product can occur having only a single operator.
    Type: Application
    Filed: September 23, 2008
    Publication date: March 26, 2009
    Applicant: GRISWOLD CONTROLS INC
    Inventor: David Burton Keiser
  • Publication number: 20090079138
    Abstract: An improved replaceable valve shaft sealing system is disclosed that enables the operator to greatly reduce the maintenance needs of valves where rotational movement of a shaft, that is connected to the actual metering apparatus of the valve, actuates the opening or closing of the valve thereby regulating fluid flow. Such valves are subjected to differentiations in pressure, including the suction that occurs during pressure drops, temperature, which directly effects the valve body material and tolerances through thermal expansion, degradation of the sealing members due to presence of chemicals and absence of lubrication and wear due to the constant adjustment of the valve due to environmental variables, Current designs use O-rings to prevent the seepage of fluid into the valve body and though the rotating shaft, but current designs do little to prevent contamination of the lubrication into the fluid flow nor eliminate any of the axial loads that can cause O-rings to fail.
    Type: Application
    Filed: September 23, 2008
    Publication date: March 26, 2009
    Applicant: GRISWOLD CONTROLS INC
    Inventor: David Burton Keiser
  • Patent number: 7448410
    Abstract: A high differential pressure, low torque precision temperature control valve is disclosed herein. This valve is trunnionated with stem components that are separable from the plug for ease of maintenance and manufacturability and thus reducing the need to remove the entire plug and sealing assemblies in the field. Field repair of stem sealing devices can be accomplished inline. The stem design can be smaller in diameter with smaller bearing surfaces than would be anticipated creating a lower requirement of torque to rotationally transposition the plug within the fluid chamber while under high pressure. This valve's lower trunnionated stem is stationery reducing the problems associated with o-ring failure and leakage problems with objects that rotate. Due to the design of the orifices in the plug, this valve is capable of repeatability at lower opening ranges than prior art valves and reduces jetting, caviation and erosion often associated with lower opening ranges.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: November 11, 2008
    Assignee: Griswold Controls Inc
    Inventor: David Burton Keiser
  • Publication number: 20080092966
    Abstract: A high differential pressure, low torque precision temperature control valve is disclosed herein. This valve is trunnionated with stem components that are separable from the plug for ease of maintenance and manufacturability and thus reducing the need to remove the entire plug and sealing assemblies in the field. Field repair of stem sealing devices can be accomplished inline. The stem design can be smaller in diameter with smaller bearing surfaces than would be anticipated creating a lower requirement of torque to rotationally transposition the plug within the fluid chamber while under high pressure. This valve's lower trunnionated stem is stationery reducing the problems associated with o-ring failure and leakage problems with objects that rotate. Due to the design of the orifices in the plug, this valve is capable of repeatability at lower opening ranges than prior art valves and reduces jetting, caviation and erosion often associated with lower opening ranges.
    Type: Application
    Filed: December 21, 2007
    Publication date: April 24, 2008
    Applicant: GRISWOLD CONTROLS, INC
    Inventor: David Keiser
  • Patent number: 7347408
    Abstract: A high differential pressure, low torque precision temperature control valve is disclosed herein. This valve is trunnionated with stem components that are separable from the plug for ease of maintenance and manufacturability and thus reducing the need to remove the entire plug and sealing assemblies in the field. Field repair of stem sealing devices can be accomplished inline . The stem design can be smaller in diameter with smaller bearing surfaces than would be anticipated creating a lower requirement of torque to rotationally transposition the plug within the fluid chamber while under high pressure. This valve's lower trunnionated stem is stationery reducing the problems associated with o-ring failure and leakage problems with objects that rotate. Due to the design of the orifices in the plug, this valve is capable of repeatability at lower opening ranges than prior art valves and reduces jetting, caviation and erosion often associated with lower opening ranges.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: March 25, 2008
    Assignee: Griswold Controls Inc
    Inventor: David Burton Keiser
  • Publication number: 20070209721
    Abstract: A high differential pressure, low torque precision temperature control valve is disclosed herein. This valve is trunnionated with stem components that are separable from the plug for ease of maintenance and manufacturability and thus reducing the need to remove the entire plug and sealing assemblies in the field. Field repair of stem sealing devices can be accomplished inline. The stem design can be smaller in diameter with smaller bearing surfaces than would be anticipated creating a lower requirement of torque to rotationally transposition the plug within the fluid chamber while under high pressure. This valve's lower trunnionated stem is stationery reducing the problems associated with o-ring failure and leakage problems with objects that rotate. Due to the design of the orifices in the plug, this valve is capable of repeatability at lower opening ranges than prior art valves and reduces jetting, caviation and erosion often associated with lower opening ranges.
    Type: Application
    Filed: March 24, 2006
    Publication date: September 13, 2007
    Applicant: Griswold Controls, Inc
    Inventor: David Keiser
  • Patent number: 5937890
    Abstract: A volume control insert for a ball valve that is attachable in a fluid passage of the ball valve to provide a predetermined flow condition therethrough. The insert has a convex shape corresponding to an outer surface of a valving member seated in the ball valve, and has a connector disposed on its periphery to attach the insert across the fluid passage. The insert has an elongate slot through it, such as an oblong or parabolic shaped opening, adapted to provide the predetermined flow condition. A plurality of such inserts may be furnished with a ball valve to provide a range of predetermined flow conditions that may be individually selected for the ball valve. Preferably, each of the inserts include a parabolic opening therethrough, the parabolic opening providing a substantially equal percentage flow characteristic between maximum and minimum flow rate conditions when the valving member is rotated each degree of movement between its full open and full closed positions.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: August 17, 1999
    Assignee: Griswold Controls, Inc.
    Inventor: Ali Marandi