Patents Assigned to The Protectoseal Company
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Patent number: 8317049Abstract: A vacuum breaker arrangement for use with a container includes body parts holding a resilient valve member captive. The valve member includes an intermediate body part, intermediate and enlarged head and a valve part. The valve part is made of resilient material which defines an internal passageway communicating with an opening in the body parts. The valve part includes an end portion defining a slit which is closed at a first pressure and which is automatically opened at a second, reduced pressure.Type: GrantFiled: December 20, 2005Date of Patent: November 27, 2012Assignee: The Protectoseal CompanyInventors: Thomas C. Piotrowski, Christian A. Mutzbauer
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Patent number: 7390190Abstract: A combination of a flame arrestor with a reflection suppressor is provided which not only arrests an advancing flame front, but also suppresses or mitigates a reflection wave that is generated by a pressure wave that passes through the combination and continues on to a pipe restriction what generates a reflection wave that proceeds back to the combination. At the combination, the reflection suppressor suppresses and/or mitigates the reflection wave, thereby avoiding a heightened pressure in the combination that could cause a re-ignition and a new flame front and pressure front. The reflection suppressor has a tapered profile that permits a pressure wave to pass along and past the reflection suppressor as it leaves the combination but that impedes and mitigates a returning reflection wave produced by the pressure wave striking a pipe restriction and causing such a returning reflection wave.Type: GrantFiled: March 13, 2006Date of Patent: June 24, 2008Assignee: The Protectoseal CompanyInventor: Dwight E. Brooker
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Patent number: 7056114Abstract: A combination of a flame arrestor with a reflection suppressor is provided which not only arrests an advancing flame front, but also suppresses or mitigates a reflection wave that is generated by a pressure wave that passes through the combination and continues on to a pipe restriction what generates a reflection wave that proceeds back to the combination. At the combination, the reflection suppressor suppresses and/or mitigates the reflection wave, thereby avoiding a heightened pressure in the combination that could cause a re-ignition and a new flame front and pressure front. The reflection suppressor has a tapered profile that permits a pressure wave to pass along and past the reflection suppressor as it leaves the combination but that impedes and mitigates a returning reflection wave produced by the pressure wave striking a pipe restriction and causing such a returning reflection wave.Type: GrantFiled: September 16, 2003Date of Patent: June 6, 2006Assignee: The Protectoseal CompanyInventor: Dwight E. Brooker
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Publication number: 20040065449Abstract: A combination of a flame arrestor with a reflection suppressor is provided which not only arrests an advancing flame front, but also suppresses or mitigates a reflection wave that is generated by a pressure wave that passes through the combination and continues on to a pipe restriction what generates a reflection wave that proceeds back to the combination. At the combination, the reflection suppressor suppresses and/or mitigates the reflection wave, thereby avoiding a heightened pressure in the combination that could cause a re-ignition and a new flame front and pressure front. The reflection suppressor has a tapered profile that permits a pressure wave to pass along and past the reflection suppressor as it leaves the combination but that impedes and mitigates a returning reflection wave produced by the pressure wave striking a pipe restriction and causing such a returning reflection wave.Type: ApplicationFiled: September 16, 2003Publication date: April 8, 2004Applicant: The Protectoseal CompanyInventor: Dwight E. Brooker
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Patent number: 6644961Abstract: A combination of a flame arrestor with a reflection suppressor is provided which not only arrests an advancing flame front, but also suppresses or mitigates a reflection wave that is generated by a pressure wave that passes through the combination and continues on to a pipe restriction what generates a reflection wave that proceeds back to the combination. At the combination, the reflection suppressor suppresses and/or mitigates the reflection wave, thereby avoiding a heightened pressure in the combination that could cause a re-ignition and a new flame front and pressure front. The reflection suppressor has a tapered profile that permits a pressure wave to pass along and past the reflection suppressor as it leaves the combination but that impedes and mitigates a returning reflection wave produced by the pressure wave striking a pipe restriction and causing such a returning reflection wave.Type: GrantFiled: March 27, 2002Date of Patent: November 11, 2003Assignee: The Protectoseal CompanyInventor: Dwight E. Brooker
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Patent number: 6629621Abstract: A gauge hatch is provided that has a cover structure that incorporates a pallet/diaphragm combination and that is cooperatively associated with a pressure responsive liquid seal subassembly. The gauge hatch also incorporates a vent neck and a radially adjacent wall that defines with the vent neck a circumferentially extending reservoir. An exterior preferably radially extending arm permits the cover structure to be opened and inclined at an angle relative to the vent neck. Optionally, the cover may be kept in a closed position. The diaphragm normally seats upon the vent neck. A sealing liquid in the reservoir has a closed chamber over the reservoir liquid. When the arm is not held in a cover closed position, and up until a set vent neck pressure is reached, the liquid seal subassembly eliminates low level fugitive vapor emissions escaping from the diaphragm/seat region.Type: GrantFiled: June 12, 2001Date of Patent: October 7, 2003Assignee: The Protectoseal CompanyInventors: Thomas C. Piotrowski, Martin Clift, Baohai Liu
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Patent number: 6244457Abstract: A gauge hatch has a cover structure that incorporates a pallet/diaphragm combination and that is cooperatively associated with a pressure responsive liquid seal subassembly. The gauge hatch also incorporates a vent neck and a radially adjacent wall that defines with the vent neck a circumferentially extending reservoir. An exterior preferably radially extending arm permits the cover structure to be opened and inclined at an angle relative to the vent neck. Optionally, the cover may be kept in a closed position. The diaphragm normally seats upon the vent neck. A sealing liquid in the reservoir has a closed chamber over the reservoir liquid. When the arm is not held in a cover closed position, and up until a set vent neck pressure is reached, the liquid seal subassembly eliminates low level fugitive vapor emissions escaping from the diaphragm/seat region.Type: GrantFiled: November 26, 1997Date of Patent: June 12, 2001Assignee: The Protectoseal CompanyInventors: Thomas C. Piotrowski, Martin Clift
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Patent number: 6056005Abstract: A vent valve is provided wherein a pallet/diaphragm type valve is cooperatively and coactively associated with a pressure responsive liquid seal. The assembly eliminates low level fugitive vapor emissions escaping from the diaphragm/seat region up to a predeterminable liquid seal set pressure which preferably is less than or equal to the set pressure for diaphragm opening. A liquid reservoir with a sealed chamber is provided for the liquid seal subassembly. Fugitive emissions from a tank or the like that is associated with the vent valve enter the sealed chamber and are there contained until the pressure therein is sufficient to displace the sealing liquid to an extent sufficient to open the sealed chamber. The valve assembly can be used as a pressure vent, as a vacuum vent, and as a combination pressure and vacuum vent. Optional features, such as a constant liquid level controller, a sight glass, a signaling device, or the like can be provided.Type: GrantFiled: November 13, 1997Date of Patent: May 2, 2000Assignee: The Protectoseal CompanyInventors: Thomas C. Piotrowski, Martin Clift, Baohai Liu
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Patent number: 5795043Abstract: A lightweight, structurally strong, corrosion resistant cabinet comprised of plastic and including a bottom sump for storing corrosive materials is provided. The cabinet has a removable bottom shelf beneath which the sump is located for receiving and holding corrosive materials released in the cabinet chamber. Top, bottom, back and side walls, cabinet door(s), and cabinet shelves each have a honeycomb core that is bonded on each opposed face to at least one overlying layer of fiberglass and resin. The cabinet is preferably comprised entirely of corrosion-resistant plastic.Type: GrantFiled: November 1, 1996Date of Patent: August 18, 1998Assignee: The Protectoseal CompanyInventors: Daryl Johnson, Dennis Johnson, David Johnson
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Patent number: 5660204Abstract: An improved valve is provided for blanketing and maintaining the vapor space of a tank with inert gas at a set pressure. The valve is of the type that incorporates a pilot valve that operates in response to sensed tank vapor space gas pressure. The opening and closing of the pilot valve controls the opening and closing of an associated main valve which admits pressurized inert gas into the tank from an inert gas supply to maintain the tank set pressure. The valve permits one to externally adjust internal components of the pilot valve after valve assembly. Also, the valve provides for pressure balanced operation that achieves a consistent opening pressure over the allowable range of inlet gas supply pressures.Type: GrantFiled: August 21, 1995Date of Patent: August 26, 1997Assignee: The Protectoseal CompanyInventors: Thomas C. Piotrowski, William Zehr, Scott R. Diaz
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Patent number: 4249563Abstract: A manifold mounting pairs of relief valves in side-by-side clusters having a slide-rod interlock cooperating with swing-mounted clapper discs and operationally engaging handles connected thereto for selectively isolating one valve at a time from pressure in the manifold in preparation for its removal and replacement under pressure therefrom.Type: GrantFiled: October 17, 1979Date of Patent: February 10, 1981Assignee: The Protectoseal CompanyInventor: Harry N. Shaw
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Patent number: 4182384Abstract: A method and means for removing the fire extinguisher dry powder from its pressurized cylinder using a vacuum pump and appropriate apparatus and collecting the powder in a drum and to prevent powder degradation. The apparatus is simple to operate and provides a clean, fast method for discharging and removing dry chemical powder from fire extinguisher cylinders.Type: GrantFiled: July 3, 1978Date of Patent: January 8, 1980Assignee: The Protectoseal CompanyInventor: William J. Zehr
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Patent number: 4121632Abstract: A compact filling station for fire extinguisher cylinders wherein the cylinder is weighed as the fire extinguishing material is fed therein to determine the correct quantity in said cylinder and said cylinder is filled by using a vacuum.Type: GrantFiled: September 23, 1977Date of Patent: October 24, 1978Assignee: The Protectoseal CompanyInventor: William J. Zehr
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Patent number: 4006780Abstract: A device for rupturing a pressurized cylinder containing a fire extinguishing product wherein when the temperature is high enough to melt the fusible link, it will cause a spring-loaded punch to forcibly propel the punch downwardly to rupture a rupturable disk in the cylinder to allow the contents to be ejected therefrom.Type: GrantFiled: May 24, 1976Date of Patent: February 8, 1977Assignee: The Protectoseal CompanyInventor: William J. Zehr