Search Patents
  • FILTER MEDIA SUITABLE FOR HYDRAULIC APPLICATIONS
    Publication number: 20150182885
    Abstract: Filter media, including those suitable for hydraulic applications, and related components, systems, and methods associated therewith are provided. The filter media described herein may include two or more layers, at least one of the layers having a relatively high percentage of microglass fibers. Additionally, the filter media may be designed such that the ratio of average fiber diameters between two layers is relatively small, which can lead to a relatively low resistance ratio between the layers. In some embodiments, at least one layer of the filter media comprises synthetic polymer fibers. Certain filter media described herein may have desirable properties including high dirt holding capacity and a low resistance to fluid flow. The media may be incorporated into a variety of filter element products including hydraulic filters.
    Type: Application
    Filed: December 29, 2014
    Publication date: July 2, 2015
    Applicant: Hollingsworth & Vose Company
    Inventors: Cameron Thomson, Milind Godsay, Randall Keisler
  • Battery separators comprising inorganic particles
    Patent number: 10644289
    Abstract: Battery separators are generally provided. In some embodiments, the battery separators may comprise a non-woven web including a plurality of inorganic particles (e.g., silica). The non-woven web may include, in some embodiments, a plurality of relatively coarse glass fibers (e.g., having an average diameter of greater than about 1.5 microns), e.g., such that the non-woven web has a particular largest pore size and median pore size. The combination of inorganic particles with a non-woven web having features described herein may exhibit enhanced electrolyte stratification distance and/or reduced electrolyte filling time. In some embodiments, such improvements may be achieved while having relatively minimal or no adverse effects on another property of the battery separator and/or the overall battery.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: May 5, 2020
    Assignee: Hollingsworth & Vose Company
    Inventor: Zhiping Jiang
  • FILTER MEDIA WITH FINE STAPLE FIBERS
    Publication number: 20150174509
    Abstract: Filter media, including those suitable for hydraulic applications, and related components, systems, and methods associated therewith are provided. In some embodiments, a filter media may include a non-woven layer comprising blend of glass fibers and polymeric staple fibers. The polymeric staple fibers may have a relatively small diameter. The non-woven layer comprising the fiber may have desirable properties such as one or more of a low micron rating for beta efficiency, high dust holding capacity, and/or a low resistance to fluid flow. In certain embodiments, the filter media may include two or more layers, at least one of the layers including a non-woven layer comprising the fiber blend. In some such cases, the filter media may include one or more layers that serve to enhance the overall properties of the filter media.
    Type: Application
    Filed: December 20, 2013
    Publication date: June 25, 2015
    Applicant: Hollingsworth & Vose Company
    Inventor: Sneha Swaminathan
  • FILTER MEDIA HAVING AN OPTIMIZED GRADIENT
    Publication number: 20160214044
    Abstract: Filter media having a gradient in a property and methods associated with such media are provided. In some embodiments, a filter media may have a gradient in mean pore size. The gradient in mean pore size may be across at least a portion of the thickness of the filter media. In some embodiments, the gradient can be represented by an exponential function. The exponential gradient in mean pore size may impart desirable properties to the filter media including enhanced filtration properties (e.g., relatively high dust holding capacity and efficiency), amongst other benefits. The filter media may be particularly well-suited for applications that involve filtering liquids (e.g., hydraulics, fuel, lube, water), though the media may also be used in other applications.
    Type: Application
    Filed: August 22, 2014
    Publication date: July 28, 2016
    Applicant: HOLLINGSWORTH & VOSE COMPANY
    Inventors: Maxim Silin, Sudhakar Jaganathan
  • MULTI-LAYERED ELECTRET-CONTAINING FILTRATION MEDIA
    Publication number: 20180001244
    Abstract: Filter media for filtering gas streams (e.g., air) are described herein. In some embodiments, the filter media may be designed to have desirable properties such as stable filtration efficiency, high oil repellency, low instantaneous resistance, and/or stable service life. One or more layers of the media may have a certain value of thickness over instantaneous resistance (and/or a ratio of thickness over instantaneous resistance between two layers). The filter media described herein may be particularly well-suited for applications that involve filtering gas streams (e.g., face masks, cabin air filtration, vacuum filtration, respirator equipment), though the media may also be used in other applications.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 4, 2018
    Applicant: Hollingsworth & Vose Company
    Inventors: Siqiang Zhu, Mark A. Gallimore, Stephen T. Cox
  • Glass fiber separators for lead-acid batteries
    Patent number: 6495286
    Abstract: A glass fiber separator material is disclosed. The separator is composed of a mass of intermeshed glass fibers substantially all of which have a fiber diameter not greater than about 20 &mgr;m, and at least 5 percent w/w of which have a fiber diameter less than 1 &mgr;m, and, distributed through the glass fibers, and from 0.2 percent w/w to 20 percent w/w of cellulose fibrils. The fibrils are from a slurry having a Canadian freeness sufficiently low that the separator material has a tensile strength greater than an otherwise identical separator where glass fibers having an average diameter greater than 1 &mgr;m replace the cellulose fibrils.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: December 17, 2002
    Assignee: Hollingsworth & Vose Company
    Inventors: George C. Zguris, Frank C. Harmon, Jr.
  • Batteries containing bismuth glass compositions
    Patent number: 8211575
    Abstract: Disclosed are glass compositions, glass fiber compositions, glass fiber battery separators, glass fiber filter media, battery additives and active materials formed with glass compositions disclosed, glass fiber radiation shields, and glass fiber paper compositions. Certain embodiments include, among other components, bismuth oxide. Certain embodiments include about 0.5-30% bismuth oxide of the composition by weight and silica oxide at about 54-70% of the composition by weight. Embodiments may also include other components. For example, zinc oxide can make up about 0.01-3% of the composition by weight.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: July 3, 2012
    Assignee: Hollingsworth & Vose Company
    Inventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
  • Glass fiber separators for batteries and method for making such separators
    Publication number: 20020142226
    Abstract: A glass fiber Separator material is disclosed. The separator is composed of a mass of intermeshed glass fibers substantially all of which have a fiber diameter not greater than about 20 &mgr;m, and at least 5 percent w/w of which have a fiber diameter less than 1 &mgr;m, and, distributed through the glass fibers, and from 0.2 percent w/w to 20 percent w/w of cellulose fibrils. The fibrils are from a slurry having a Canadian freeness sufficiently low that the separator material has a tensile strength greater than an otherwise identical separator where glass fibers having an average diameter greater than 1 &mgr;m replace the cellulose fibrils.
    Type: Application
    Filed: October 9, 2001
    Publication date: October 3, 2002
    Applicant: Hollingsworth & Vose Company
    Inventors: George C. Zguris, Frank C. Harmon
  • FILTER MEDIA WITH IRREGULAR STRUCTURE AND/OR REVERSIBLY STRETCHABLE LAYERS
    Publication number: 20230026576
    Abstract: Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non-woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.
    Type: Application
    Filed: July 26, 2022
    Publication date: January 26, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Bruce Smith, Mohammad A. Hassan, Maxim Silin, Sudheer Jinka, Greg Wagner Farell, David T. Healey
  • FILTER MEDIA HAVING AN OPTIMIZED GRADIENT
    Publication number: 20210101100
    Abstract: Filter media having a gradient in a property and methods associated with such media are provided. In some embodiments, a filter media may have a gradient in mean pore size. The gradient in mean pore size may be across at least a portion of the thickness of the filter media. In some embodiments, the gradient can be represented by an exponential function. The exponential gradient in mean pore size may impart desirable properties to the filter media including enhanced filtration properties (e.g., relatively high dust holding capacity and efficiency), amongst other benefits. The filter media may be particularly well-suited for applications that involve filtering liquids (e.g., hydraulics, fuel, lube, water), though the media may also be used in other applications.
    Type: Application
    Filed: October 21, 2020
    Publication date: April 8, 2021
    Applicant: Hollingsworth & Vose Company
    Inventors: Maxim Silin, Sudhakar Jaganathan
  • FILTER MEDIA SUITABLE FOR HYDRAULIC APPLICATIONS
    Publication number: 20180272255
    Abstract: Filter media, including those suitable for hydraulic applications, and related components, systems, and methods associated therewith are provided. The filter media described herein may include two or more layers, at least one of the layers having a relatively high percentage of microglass fibers. Additionally, the filter media may be designed such that the ratio of average fiber diameters between two layers is relatively small, which can lead to a relatively low resistance ratio between the layers. In some embodiments, at least one layer of the filter media comprises synthetic polymer fibers. Certain filter media described herein may have desirable properties including high dirt holding capacity and a low resistance to fluid flow. The media may be incorporated into a variety of filter element products including hydraulic filters.
    Type: Application
    Filed: March 15, 2018
    Publication date: September 27, 2018
    Applicant: Hollingsworth & Vose Company
    Inventors: Cameron Thomson, Milind Godsay, Randall B. Keisler
  • SYSTEMS AND METHODS FOR MAKING FIBER WEBS
    Publication number: 20120312487
    Abstract: Systems and methods for forming fiber webs, including those suitable for use as filter media and battery separators, are provided. In some embodiments, the systems and methods may involve the use of one or more fiber mixtures to form a fiber web. The fiber mixtures may flow in different portions of a system for forming a fiber web that may be separated by a lamella, and may join at a fiber web forming zone to produce a fiber web having multiple layers. The amount of mixing of the fiber mixtures at or near the fiber web forming zone may be controlled to produce fiber webs having different structural and/or performance characteristics. In some embodiments, the systems and methods described herein can be used to form fiber webs having a gradient in a property across a portion of, or the entire, thickness of the fiber web.
    Type: Application
    Filed: May 11, 2012
    Publication date: December 13, 2012
    Applicant: Hollingsworth & Vose Company
    Inventors: Douglas M. Guimond, Mark S. Millar, David Vallery, Milind Godsay
  • Filter media including a filtration layer comprising synthetic fibers
    Patent number: 10252200
    Abstract: Filter media comprising a filtration layer comprising synthetic fibers (e.g., pleatable backer layer) and related components, systems, and methods associated herewith are provided. In some embodiments, the filtration layer comprising synthetic fibers may be a non-woven web comprising a blend of coarse and fine diameter fibers. The filtration layer comprising synthetic fibers may be designed to have desirable performance properties without compromising certain mechanical properties, such as the pleatability of the media. In some embodiments, a filter media, described herein, may comprise the filtration layer comprising synthetic fibers and an efficiency layer. Filter media, as described herein, may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: April 9, 2019
    Assignee: Hollingsworth & Vose Company
    Inventors: Nagendra Anantharamaiah, Sudhakar Jaganathan, Gerald Gadbois, Maxim Silin, Mark A. Gallimore
  • FILTER MEDIA INCLUDING A WAVED FILTRATION LAYER HAVING A GRADIENT
    Publication number: 20180272258
    Abstract: Filter media comprising a waved filtration layer having a gradient in a property and associated methods are provided. The waved filtration layer may include fibers that form one or more fiber webs. In some embodiments, the diameter of the fibers may vary across at least a portion of the thickness of the waved filtration layer to produce a gradient in fiber diameter. The gradient may be designed to impart beneficial properties to the filter media, such as low pressure drop and long lifetime. In some embodiments, the gradient may be characterized by mathematical equations that describe the change in fiber diameter across at least a portion of the thickness of the waved filtration layer. The filter media, described herein, may be particularly well-suited for applications that involve filtering liquids, though the media may also be used in other applications.
    Type: Application
    Filed: March 22, 2017
    Publication date: September 27, 2018
    Applicant: Hollingsworth & Vose Company
    Inventors: David T. Healey, Bruce Smith, Arash Sahbaee, Mark A. Gallimore, Maxim Silin
  • HOT OIL DURABLE MEDIA
    Publication number: 20160067641
    Abstract: Fiber webs that include an acid scavenger are provided. In certain embodiments, the acid scavenger may be immobilized within a resin and/or on the fiber web. In some embodiments, such fiber webs are used in filter media. The filter media may be suitable for filtering fluids that contain one or more acids. The acid scavenger may serve to complex and/or neutralize acids in the vicinity of the fiber web, thereby rending the fiber web more durable against degradation in acidic environments. The respective characteristics and amounts of the acid scavenger on the fiber web may be selected to impart desirable properties to the fiber web, including enhanced mechanical and performance properties (e.g., relatively high strength and lifetime) during filtration. Filter media formed of the fiber webs may be particularly well-suited for applications that involve filtering lubricating oil or hydraulic fluids, though the media may also be used in other applications.
    Type: Application
    Filed: September 8, 2014
    Publication date: March 10, 2016
    Applicant: Hollingsworth & Vose Company
    Inventor: Augusto Rodriguez
  • Filter media including a filtration layer comprising synthetic fibers
    Patent number: 11123668
    Abstract: Filter media comprising a filtration layer comprising synthetic fibers (e.g., pleatable backer layer) and related components, systems, and methods associated herewith are provided. In some embodiments, the filtration layer comprising synthetic fibers may be a non-woven web comprising a blend of coarse and fine diameter fibers. The filtration layer comprising synthetic fibers may be designed to have desirable performance properties without compromising certain mechanical properties, such as the pleatability of the media. In some embodiments, a filter media, described herein, may comprise the filtration layer comprising synthetic fibers and an efficiency layer. Filter media, as described herein, may be particularly well-suited for applications that involve filtering air, though the media may also be used in other applications.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: September 21, 2021
    Assignee: Hollingsworth & Vose Company
    Inventors: Nagendra Anantharamaiah, Sudhakar Jaganathan, Gerald Gadbois, Maxim Silin, Mark A. Gallimore
  • BATTERY SEPARATORS AND RELATED METHODS
    Publication number: 20180145298
    Abstract: Battery separators and related methods are generally provided. The battery separators may include one or more fiber webs. In some embodiments, one or more fiber webs of the battery separator comprises a plurality of glass fibers wherein at least a portion of the glass fibers are fused. The fiber web(s) may include, for example, glass fibers having particular glass compositions (e.g., a particular Li2O content), and/or at least two different glass fibers having a minimum difference in softening temperatures. The one or more fiber webs may be designed to have desirable properties such as relatively high structural integrity (e.g., during acid filling of the battery such as in lead-acid batteries), enhanced separator stability, and/or enhanced wettability (e.g., wettability to acid) as compared to certain existing battery separators.
    Type: Application
    Filed: November 23, 2016
    Publication date: May 24, 2018
    Applicant: Hollingsworth & Vose Company
    Inventors: Yuri Vulfson, Nicolas Clement, John J. Herrington, III
  • BATTERY COMPONENTS COMPRISING FIBERS
    Publication number: 20190115579
    Abstract: Battery components are generally provided. In some embodiments, the battery components can be used as pasting paper and/or capacitance layers for batteries, such as lead acid batteries. The battery components described herein may comprise a plurality of fibers. The battery component may include, in some embodiments, a plurality of fibers and, optionally, one or more additives such as conductive carbon and/or activated carbon. In certain embodiments, the plurality of fibers include relatively coarse glass fibers (e.g., having an average diameter of greater than or equal to 2 microns), relatively fine glass fibers (e.g., having an average diameter of less than 2 microns), and/or fibrillated fibers. In some instances, such fibers may be present in amounts such that the battery component has a particular surface area, mean pore size, and/or dry tensile strength.
    Type: Application
    Filed: October 16, 2018
    Publication date: April 18, 2019
    Applicant: Hollingsworth & Vose Company
    Inventors: John A. Wertz, Nicolas Clement, Sachin Kumar, Akshay Ashirgade
  • Systems and methods for making fiber webs
    Patent number: 8877011
    Abstract: Systems and methods for forming fiber webs, including those suitable for use as filter media and battery separators, are provided. In some embodiments, the systems and methods may involve the use of one or more fiber mixtures to form a fiber web. The fiber mixtures may flow in different portions of a system for forming a fiber web that may be separated by a lamella, and may join at a fiber web forming zone to produce a fiber web having multiple layers. The amount of mixing of the fiber mixtures at or near the fiber web forming zone may be controlled to produce fiber webs having different structural and/or performance characteristics. In some embodiments, the systems and methods described herein can be used to form fiber webs having a gradient in a property across a portion of, or the entire, thickness of the fiber web.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: November 4, 2014
    Assignee: Hollingsworth & Vose Company
    Inventors: Douglas M. Guimond, Mark S. Millar, David Vallery, Milind Godsay
  • BATTERY COMPONENTS COMPRISING FIBERS
    Publication number: 20220247037
    Abstract: Battery components are generally provided. In some embodiments, the battery components can be used as pasting paper and/or capacitance layers for batteries, such as lead acid batteries. The battery components described herein may comprise a plurality of fibers. The battery component may include, in some embodiments, a plurality of fibers and, optionally, one or more additives such as conductive carbon and/or activated carbon. In certain embodiments, the plurality of fibers include relatively coarse glass fibers (e.g., having an average diameter of greater than or equal to 2 microns), relatively fine glass fibers (e.g., having an average diameter of less than 2 microns), and/or fibrillated fibers. In some instances, such fibers may be present in amounts such that the battery component has a particular surface area, mean pore size, and/or dry tensile strength.
    Type: Application
    Filed: February 17, 2022
    Publication date: August 4, 2022
    Applicant: Hollingsworth & Vose Company
    Inventors: John A. Wertz, Nicolas Clement, Sachin Kumar, Akshay Ashirgade
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