Patents by Inventor David J. Dunn
David J. Dunn 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).
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Patent number: 10494473Abstract: A hybrid polyurethane/polyurea polymer suitable for forming a coating on a structure which is in contact with water includes the reaction product of a polyol component consisting of one or more polyols, a polyamine, and a curing agent, such as a polyisocyanate. The polyol component includes a Novolac-type polyether polyol.Type: GrantFiled: March 13, 2017Date of Patent: December 3, 2019Assignee: Raven Lining Systems, Inc.Inventors: William E. Ishmael, Jr., David L. Stanley, David J. Dunn
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Publication number: 20170260319Abstract: A hybrid polyurethane/polyurea polymer suitable for forming a coating on a structure which is in contact with water includes the reaction product of a polyol component consisting of one or more polyols, a polyamine, and a curing agent, such as a polyisocyanate. The polyol component includes a Novolac-type polyether polyol.Type: ApplicationFiled: March 13, 2017Publication date: September 14, 2017Inventors: William E. Ishmael, JR., David L. Stanley, David J. Dunn
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Patent number: 8053031Abstract: A two-part epoxy composition is provided that comprises a first part having a mixture of an epoxy resin and an anhydride, and a second part having a curing agent. Also provided is a method for making a substantially bis-?-glycol free epoxy resin for two-part epoxy compositions, and a method for applying a two-part epoxy composition to a system of water piping.Type: GrantFiled: July 26, 2007Date of Patent: November 8, 2011Assignee: Raven Lining Systems Inc.Inventors: David L. Stanley, David J. Dunn
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Punch, apparatus and method for forming opposing holes in a hollow part, and a part formed therefrom
Patent number: 7484397Abstract: A punch, apparatus and method for forming opposing holes in a hollow part, and a part formed therefrom. The punch includes an end portion adapted to pierce an entry hole and bend material around the entry hole to form a retained slug along an inner edge of the entry hole. The punch also includes an enlarging portion adapted to enter the entry hole after the end portion to enlarge the entry hole by bending the slug and additional material towards the interior of the part. The punch has a length greater than a cross-section of the part such that further advancement of the punch through the part punches an exit hole in the part opposite the entry hole.Type: GrantFiled: January 12, 2006Date of Patent: February 3, 2009Assignee: Vari-Form, Inc.Inventors: Jose U. Coelho, David J. Dunn, Martin L. Bliss -
Publication number: 20090029059Abstract: A two-part epoxy composition is provided that comprises a first part having a mixture of an epoxy resin and an anhydride, and a second part having a curing agent. Also provided is a method for making a substantially bis-?-glycol free epoxy resin for two-part epoxy compositions, and a method for applying a two-part epoxy composition to a system of water piping.Type: ApplicationFiled: July 26, 2007Publication date: January 29, 2009Inventors: David L. Stanley, David J. Dunn
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Punch, apparatus and method for forming opposing holes in a hollow part, and a part formed therefrom
Patent number: 7462402Abstract: A punch, apparatus and method for forming opposing holes in a hollow part, and a part formed therefrom. The punch includes an end portion adapted to pierce an entry hole and bend material around the entry hole to form a retained slug along an inner edge of the entry hole. The punch also includes an enlarging portion adapted to enter the entry hole after the end portion to enlarge the entry hole by bending the slug and additional material towards the interior? of the part. The punch has a length greater than a cross-section of the part such that further advancement of the punch through the part punches an exit hole in the part opposite the entry hole.Type: GrantFiled: April 23, 2007Date of Patent: December 9, 2008Assignee: Vari-Form Inc.Inventors: Jose U. Coelho, David J. Dunn, Martin L. Bliss -
Patent number: 5845599Abstract: A control system for a vacuum milking system, and a method of controlling vacuum in such milking system. The system comprises an electric vacuum pump motor, a vacuum transducer for providing an output signal that varies as a function of changes in vacuum in the milking line and a variable frequency drive (VFD) connected to the vacuum pump motor and the transducer for controlling the speed of the motor. The VFD varies the frequency of the power signal it provides to the motor as a function of deviation between the output signal from the transducer, which the VFD is programmed to recognize as representative of vacuum, and a setpoint representative of vacuum.Type: GrantFiled: February 10, 1997Date of Patent: December 8, 1998Assignee: SmartEnergy Services, Inc.Inventors: G. Frederick Bova, David J. Dunn, James J. Allen
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Patent number: 4855002Abstract: Polymerizable acrylic monomer adhesive systems comprising thirty to eighty percent by weight powdered aluminum filler material are disclosed. More specifically, the adhesive compositions comprise at least one polymerizable acrylate monomer system; an effective amount for initiation of a free radical initiator; and elemental (atomized) aluminum metal powder or powdered alumina.Type: GrantFiled: January 13, 1989Date of Patent: August 8, 1989Assignee: Loctite CorporationInventors: David J. Dunn, Patrick P. Vano, James P. Moran, Jr., Mark Holmes, Elliott Frauenglass
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Patent number: 4756787Abstract: A co-curable composition, having utility as a first part of a two-part cationically curable composition and containing a latent curing component which is reactive with a latent curing component in a second part of the two-part composition to form curingly effective cations for the two-part composition, such co-curable composition comprising: (i) a cationically polymerizable material, and (ii) a dioxane-complexed metal salt of a non-nucleophilic anion. Also disclosed is a two-part composition curable by contact of respective parts with one another, comprising first and second parts of the aforementioned types. A preferred class of cation species comprises carbenium ions derived from reaction of an organic halide compound, as the first component, with a metal salt of a non-nucleophilic anion such as SbCl.sub.6.sup.-, SbCl.sub.3.sup.-, SbF.sub.6.sup.-, AsF.sub.6.sup.-, SnCl.sub.5.sup.-, PF.sub.6.sup.-, BF.sub.4.sup.-, CF.sub.3 SO.sub.3.sup.-, and ClO.sub.4.sup.-, as the second component.Type: GrantFiled: November 6, 1987Date of Patent: July 12, 1988Assignee: Loctite CorporationInventors: Kieran F. Drain, David J. Dunn
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Patent number: 4722960Abstract: Polymerizable acrylic monomer adhesive systems comprising thirty to eighty percent by weight powdered aluminum filler material are disclosed. More specifically, the adhesive compositions comprise at least one polymerizable acrylate monomer system; an effective amount for initiation of a free radical initiator; and elemental (atomized) aluminum metal powder or powdered alumina.Type: GrantFiled: January 18, 1983Date of Patent: February 2, 1988Assignee: Loctite CorporationInventors: David J. Dunn, Patrick P. Vano, James P. Moran, Jr., Mark Holmes, Elliott Frauenglass
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Patent number: 4717440Abstract: A two-part composition curable by contact of respective parts with one another, comprising: a first part comprising a cationically polymerizable material and a first latent curing component; and a second part comprising a cationically polymerizable material and a second latent curing component which is reactive with the first component to form cations which are curingly effective for the resin. A preferred class of cation species comprises carbenium ions derived from reaction of organic halide compounds, as the first component, with silver salts of non-nucleophilic anions, e.g., SbCl.sub.6.sup.-, SbCl.sub.3.sup.-, SbF.sub.6.sup.-, AsF.sub.6.sup.-, SnCl.sub.5.sup.-, PF.sub.6.sup.-, BF.sub.4.sup.-, CF.sub.3 SO.sub.3.sup.- and ClO.sub.4.sup.-, as the second component, The respective parts of the two-part composition may be applied to matable surfaces which then are contacted to effect rapid bonding cure of the composition.Type: GrantFiled: January 22, 1986Date of Patent: January 5, 1988Assignee: Loctite CorporationInventors: Kieran F. Drain, David J. Dunn
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Patent number: 4581427Abstract: An adhesive composition which exhibits fast curing through large gaps is disclosed. The composition comprises (A) at least one addition polymerizable vinyl-type monomer; (B) at least one free radical stabilizer; and (C) a free radical cure system. The free radical cure system comprises (i) at least one free radical initiator, and (ii) at least one ferrocene type compound.Type: GrantFiled: April 4, 1985Date of Patent: April 8, 1986Assignee: Loctite CorporationInventors: David J. Dunn, Kieran F. Drain
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Patent number: 4565837Abstract: Compounds with a plurality of oxirane functional groups can be cured to a fixture in less than one minute with a catalyst composition of a trityl or tropylium salt of a non-nucleophillic anion and a suitable solvent. Typical catalyst salts include trityl tetrafluoroborate, trityl hexachloroantimonate and tropylium hexafluorophosphate. The catalyst composition may conveniently be extended with liquid polymeric vehicles and acidic fillers.Type: GrantFiled: November 7, 1984Date of Patent: January 21, 1986Assignee: Loctite CorporationInventors: Kieran F. Drain, David J. Dunn
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Patent number: 4426410Abstract: A method for coating the internal threads of a fastener includes a rotatable base for holding the fastener, and an applicator having a discharge orifice extending through its side wall which contacts the internal threads at a single point of tangency, the axis of the applicator being offset from the rotational axis of the base. Thus, an induced side load force is created at the point of tangency for effecting the pressing of discharged sealant into the roots of the threads. Differently sized internally threaded elements can be coated in accordance with the invention while using the same sealant applicator.Type: GrantFiled: November 3, 1982Date of Patent: January 17, 1984Assignee: Loctite CorporationInventors: Colin Watson, David J. Dunn
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Patent number: 4416921Abstract: A composition of matter which is useful in a process for impregnating and sealing of porous articles, the composition comprising:(a) an azonitrile;(b) a polymerizable acrylic monomer;(c) a substituted, sterically-hindered phenol; and(d) a metal ion chelator.Type: GrantFiled: July 17, 1981Date of Patent: November 22, 1983Assignee: Loctite (Ireland) LimitedInventor: David J. Dunn
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Patent number: 4372245Abstract: A device for coating the internal threads of a fastener includes a rotatable base for holding the fastener, and an applicator having a discharge orifice extending through its side wall which contacts the internal threads at a single point of tangency, the axis of the applicator being offset from the rotational axis of the base. Thus, an induced side load force is created at the point of tangency for effecting the pressing of discharged sealant into the roots of the threads. Differently sized internally threaded elements can be coated in accordance with the invention while using the same sealant applicator.Type: GrantFiled: March 13, 1981Date of Patent: February 8, 1983Assignee: Loctite CorporationInventors: Colin Watson, David J. Dunn