US3502361A - Magnetically biased tank vent - Google Patents

Magnetically biased tank vent Download PDF

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Publication number
US3502361A
US3502361A US3502361DA US3502361A US 3502361 A US3502361 A US 3502361A US 3502361D A US3502361D A US 3502361DA US 3502361 A US3502361 A US 3502361A
Authority
US
United States
Prior art keywords
cover
magnet
plate
lip
closed position
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
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English (en)
Inventor
Walter J Sieverin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GPE Controls Inc
Original Assignee
GPE Controls Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GPE Controls Inc filed Critical GPE Controls Inc
Application granted granted Critical
Publication of US3502361A publication Critical patent/US3502361A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0446—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/10—Manholes; Inspection openings; Covers therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/22—Safety features
    • B65D90/32—Arrangements for preventing, or minimising the effect of, excessive or insufficient pressure
    • B65D90/34—Venting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
    • F16K31/084—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet the magnet being used only as a holding element to maintain the valve in a specific position, e.g. check valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/11—Magnetic

Definitions

  • the present invention relates the vent fittings such as breather or emergency vents for storage tanks, and the like, and more particularly to novel means for magnetically biasing the hingedly mounted pallet or cover of such a device in the closed position.
  • the cover is provided with a lip portion extending outwardly from one edge thereof, outside the valve seat.
  • the lip is diametrically opposite the hinged mounting of the cover upon the base.
  • the permanent magnet is fixedly attached to the base with its pole pieces facing upwardly toward the lip on the cover.
  • Loosely affixed to the lip is a plate of magnetically permeable material. The loose mounting may be accomplished, for example, by means of a bolt affixed to the lip and passing through an oversized hole in the plate of magnetically permeable material. The plate is retained by the head of the bolt, which allows a certain amount of movement of the plate between the bolt head and the lip on the cover.
  • the dimensioning and arrangement of parts is such that when the cover closes to make contact with the seat, the amount of impact transmitted to the magnet is far below the force required to cause any damage thereto since only the relatively light plate and not the cover transmits force to the magnet. At the same time, however, the cover is held firmly in position on the seat by virtue of the plate being pulled into firm contact with the head of the bolt which is afiixed in the lip on the cover.
  • FIG. 1 is a perspective view of a preferred embodiment of the invention showing the cover in the open position with certain elements axially exploded;
  • FIG. 2 is a side elevation, partially in section, showing the cover in the closed position.
  • the invention is intended for incorporation in hingedly mounted cover constructions for tank fittings such as breather or emergency vents, and the like.
  • the illustrated embodiment shows the invention in an application for the relief of over-pressure with a tank or other enclosed structure with which it is associated, it will be immediately apparent that conventional modifications in the manner of mounting would allow its use to relieve a vacuum within the tank.
  • the nature of many conventional elements, shown by way of example in the present disclosure, is subject to variation within scope of the art.
  • Annular base portion 10 is designed for fixed attachment to a tank structure, or like enclosure, in registration with an appropriate opening therein.
  • Base 10 includes an upstanding flange 12 terminating in an upper surface defining annular seat 14.
  • Generally circular cover 16 is hingedly attached in a conventional manner such as hinge pin 18 to base 10 for movement between open and closed positions with respect to seat 14.
  • a conventional diaphragm structure such as that indicated by reference numeral 20 in FIG. 2, may be provided to insure sealing of thecover against the seat, thus preventing or minimizing leakage through the opening when the cover is in the closed position.
  • Cover 16 includes lip portion 22 extending outwardly from the side thereof opposite the connection of cover 16 to base 10 by hinge pin 18.
  • Plate 24 is losely affixed to the side of lip 22 facing base 10 by means of bolt 26 which extends through central opening 28 in plate 24 into an appropriately threaded opening in lip 22. That is, opening 28 is somewhat larger than the outer diameter of bolt 26, but smaller than head 30 of the bolt, so that plate 24 is loosely retained between lip 22 and head 30 of bolt 26.
  • bolt 26 is threaded into lip 22 by such an amount that a desired distance of clearance or movement is provided for plate 24.
  • Roll pin 32 extends fixedly from lip 22 loosely through opening 34 in plate 24. Thus, roll pin 32 prevents rotation of plate 24 about bolt 26, but still allows the aforementioned axial travel along the bolt of the plate.
  • Plate 24 includes two further openings 36 and 3-8, for a purpose which will be presently described.
  • Permanent magnet 40 is fixedly attached to base 10 by means of screw 42 which passes through a central opening in the magnet and is threaded in an opening in the base.
  • Magnet 40 in the illustrated embodiment, is generally circular and includes segmented pole pieces 44 which face upwardly toward lip 22 and in registration with plate 24, when the magnet is affixed as shown in FIG. 2. Pole pieces 44 terminate in face surfaces 45, all of which lie in a single, fiat plane.
  • the dimensioning and arrangement of the afore-described elements is such that when cover 16 is in the closed position, as seen in FIG. 2, the lower, planar surface of plate 24 contacts face surfaces 45 of the pole pieces of magnet 40 and the plate is held in firm engagement with head 30 of bolt 26.
  • the biasing force of magnet 40 tends to hold cover 16 firmly in its closed position with diaphragm 20 in sealing engagement with seat 14.
  • Pressure within the tank with which the device is associated is exerted on the lower side of cover 16 within seat 14, in opposition to the atmospheric pressure on the upper side of the cover.
  • the tank pressure exceeds atmospheric pressure by an amount sufficient to overcome the combined loading force of magnet 40 and the weight of cover 16, the latter will be lifted otf seat 14, thereby breaking the magnetic bond between magnet 40 and plate 24.
  • cover 16 (or diaphragm 20) makes contact with valve seat 14, thereby stopping the movement of cover 16, before any impact is transferred from the cover to magnet 40.
  • plate 24 makes contact with pole pieces 44 of the magnet during movement of cover 16, the mass of plate 24 is low enough that no damage to the magnet will result.
  • the space provided for movement of plate 24 between head 30 of bolt 26 and the lower surface of lip 22 insures that substantially no impact will be transmitted from cover 16 to magnet 40.
  • Means are provided for quickly and easily adjusting the amount of force exerted by the magnet on cover 16. Holes 36 and 38 in plate 24 are so positioned with respect to the segmented pole pieces 44 of magnet 40 that the relative rotational positions of plate 24 and magnet 40 determine the degree of alignment between these holes and face surfaces 45 of two of the pole pieces. In the illustrated embodiment, pin 32 prevents rotational movement of plate 24. However, magnet 40 may be set in any desired rotational position and retained therein by tightening screw 42. The total pulling force exerted by magnet 40 is a function of the degree of magnetization of the magnet and the contacting area of face surfaces 45 and plate 24.
  • the magnet is designed to have a predetermined total area on the faces of pole pieces 44. This is the maximum area over which the face surfaces of the magnet and plate 24 can be in mutual contact, assuming holes 36 and 38 are no greater in diameter than the spaces between the pole pieces.
  • magnet 40 will exert a maximum biasing force on cover 16.
  • the pole pieces, as well as the holes in the magnet plate may be provided in any desired number and configuration. For example, rather than being round, the
  • the magnet material is initially formed in the desired configuration and is then fully magnetized or saturated in conventional manner.
  • the magnet is then knocked down or stabilized at a point preferably between 5% and 15% below saturation.
  • Plate 24 for most applications, may be formed by a stamping operation followed by deburring or polishing.
  • the plate is made, of course, from a material with a high degree of magnetic permeability such as stainless steel.
  • emergency vents of the type described herein are typically loaded to open at a tank pressure of a few ounces .per square inch above atmospheric pressure.
  • a permanent magnet of the type illustrated, having six pole faces of equal size and shape with one another and with the spaces therebetween may easily be fabricated to exert a pulling force on the cover of 15 pounds with an outer diameter of about 1% inches. Since the cover is held on one side by the hinge and the magnet is placed diametrically opposite the hinged mounting, the pressure required to lift the cover would be double the pulling force exerted by the magnet. Hence, a magnet exerting 15 pounds pulling force would provide the required holding force for a set pressure of about 9 ounces per square inch on an 8 inch emergency vent.
  • This loading may be continuously varied down to about 6% ounces per square inch since the force adjusting means illustrated provides the capability of set ting the pulling force exerted on the cover anywhere between about 1l% and 15 pounds. Obviously, larger and more strongly magnetized magnets may be used in conjunction with larger cover constructions, or those in which a larger unit loading is desired.
  • the invention provides a vent construction which may be loaded or biased in the closed position in an extremely simple and inexpensive manner.
  • the cost of making and assembling the component parts will normally be as low or lower than that for a conventionally weight-loaded cover construction. Since the heavy and bulky lead weights normally attached directly to the cover are eliminated by the present invention shipment, storage and maintenance costs are minimized. Furthermore, operating efficiency is improved since the cover tends to move' to the fully opened position as soon as the set pressure has been reached.
  • the unique manner of mounting the elements provided by the present invention insures against damage to any of the parts due to impact.
  • a pressure-responsive vent comprising, in combination:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • External Artificial Organs (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Soft Magnetic Materials (AREA)
  • Building Environments (AREA)
US3502361D 1968-05-29 1968-05-29 Magnetically biased tank vent Expired - Lifetime US3502361A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73297268A 1968-05-29 1968-05-29

Publications (1)

Publication Number Publication Date
US3502361A true US3502361A (en) 1970-03-24

Family

ID=24945666

Family Applications (1)

Application Number Title Priority Date Filing Date
US3502361D Expired - Lifetime US3502361A (en) 1968-05-29 1968-05-29 Magnetically biased tank vent

Country Status (7)

Country Link
US (1) US3502361A (de)
AT (1) AT297596B (de)
DE (1) DE1927102A1 (de)
ES (1) ES367144A1 (de)
FR (1) FR2043745B1 (de)
GB (1) GB1222746A (de)
NL (1) NL6908141A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650439A (en) * 1969-11-25 1972-03-21 Mike S Shimooka Automatic sugar dispenser
JPS5432828A (en) * 1977-08-17 1979-03-10 Vapor Corp Magnetic latch for relief valve
US4253489A (en) * 1979-11-08 1981-03-03 Vapor Corporation Magnetic latch for pressure relief valve
DE3819543A1 (de) * 1988-06-08 1989-01-12 G U E Schaal Konstruktion & Ko Vorrichtung zum niederhalten von kofferraumdeckeln
US5092483A (en) * 1991-02-04 1992-03-03 A.B Chance Co. Component retaining pressure relief system
US6470795B1 (en) * 2000-02-18 2002-10-29 Fresh Express, Inc. Methods and apparatus for vacuum/gas flush treatment of fresh produce
US20180339816A1 (en) * 2015-12-10 2018-11-29 Applied Materials, Inc. Closure or lock device for a vacuum chamber
WO2021183820A1 (en) * 2020-03-11 2021-09-16 Ockerman Automation Consulting, Inc. Flush-mount valve
US11279458B2 (en) 2020-03-11 2022-03-22 Ockerman Automation Consulting, Inc. Low profile vent assembly for a boat

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060266359A1 (en) * 2005-02-28 2006-11-30 Van Beurden Jason P Pressure relief valve
DE102010049649A1 (de) * 2010-10-28 2012-05-03 Carl Freudenberg Kg Magnetisch dichtende Ventilvorrichtung für ein Batteriegehäuse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB629903A (en) * 1947-02-27 1949-09-30 Stanley Feneley Bickell Improvements in or relating to holding or fastening devices for doors and the like
US2693382A (en) * 1951-03-17 1954-11-02 Macy O Teetor Magnetic door catch
US2733092A (en) * 1956-01-31 Magnetic door catch
US2801870A (en) * 1954-12-22 1957-08-06 Gen Electric Magnetic latch
US2970857A (en) * 1957-07-24 1961-02-07 Midwest Mfg Company Magnetic door latch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733092A (en) * 1956-01-31 Magnetic door catch
GB629903A (en) * 1947-02-27 1949-09-30 Stanley Feneley Bickell Improvements in or relating to holding or fastening devices for doors and the like
US2693382A (en) * 1951-03-17 1954-11-02 Macy O Teetor Magnetic door catch
US2801870A (en) * 1954-12-22 1957-08-06 Gen Electric Magnetic latch
US2970857A (en) * 1957-07-24 1961-02-07 Midwest Mfg Company Magnetic door latch

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650439A (en) * 1969-11-25 1972-03-21 Mike S Shimooka Automatic sugar dispenser
JPS5432828A (en) * 1977-08-17 1979-03-10 Vapor Corp Magnetic latch for relief valve
US4253489A (en) * 1979-11-08 1981-03-03 Vapor Corporation Magnetic latch for pressure relief valve
DE3819543A1 (de) * 1988-06-08 1989-01-12 G U E Schaal Konstruktion & Ko Vorrichtung zum niederhalten von kofferraumdeckeln
US5092483A (en) * 1991-02-04 1992-03-03 A.B Chance Co. Component retaining pressure relief system
US6470795B1 (en) * 2000-02-18 2002-10-29 Fresh Express, Inc. Methods and apparatus for vacuum/gas flush treatment of fresh produce
US20180339816A1 (en) * 2015-12-10 2018-11-29 Applied Materials, Inc. Closure or lock device for a vacuum chamber
WO2021183820A1 (en) * 2020-03-11 2021-09-16 Ockerman Automation Consulting, Inc. Flush-mount valve
US11279458B2 (en) 2020-03-11 2022-03-22 Ockerman Automation Consulting, Inc. Low profile vent assembly for a boat
US11852256B2 (en) 2020-03-11 2023-12-26 Ockerman Automation Consulting, Inc. Flush-mount valve
US12560254B2 (en) 2020-03-11 2026-02-24 Ockerman Automation Consulting, Inc. Flush-mount valve

Also Published As

Publication number Publication date
FR2043745B1 (de) 1974-02-01
NL6908141A (de) 1969-12-02
ES367144A1 (es) 1971-04-01
GB1222746A (en) 1971-02-17
DE1927102A1 (de) 1969-12-04
FR2043745A1 (de) 1971-02-19
AT297596B (de) 1972-03-27

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