US3184099A - Closure plate for cargo tanker - Google Patents

Closure plate for cargo tanker Download PDF

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Publication number
US3184099A
US3184099A US28886263A US3184099A US 3184099 A US3184099 A US 3184099A US 28886263 A US28886263 A US 28886263A US 3184099 A US3184099 A US 3184099A
Authority
US
United States
Prior art keywords
cover plate
shaft
cam
deck
plate
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
William H Gravert
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.)
MMC International Corp
Original Assignee
MMC International Corp
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 MMC International Corp filed Critical MMC International Corp
Priority to US28886263 priority Critical patent/US3184099A/en
Priority to GB3705863A priority patent/GB977925A/en
Priority to NO150486A priority patent/NO115016B/no
Priority to DK553863A priority patent/DK143325C/da
Priority to DE19641431305 priority patent/DE1431305B1/de
Priority to ES0298713A priority patent/ES298713A1/es
Application granted granted Critical
Publication of US3184099A publication Critical patent/US3184099A/en
Priority to NL737301409A priority patent/NL153648B/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
    • B63B19/12—Hatches; Hatchways
    • B63B19/14—Hatch covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
    • B63B19/12—Hatches; Hatchways
    • B63B19/24—Hatch fastenings, e.g. cleats
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J13/00—Covers or similar closure members for pressure vessels in general
    • F16J13/02—Detachable closure members; Means for tightening closures
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J13/00—Covers or similar closure members for pressure vessels in general
    • F16J13/02—Detachable closure members; Means for tightening closures
    • F16J13/06—Detachable closure members; Means for tightening closures attached only by clamps along the circumference
    • 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
    • Y10T292/08—Bolts
    • Y10T292/1039—Swinging and camming
    • Y10T292/1041—Rigid operating means

Definitions

  • Ships for transporting oil or other fluid cargo are commonly provided with a number of large tanks below deck (typically 30 x 30 feet, and 60 feet deep), the deck of the vessel constituting the top cover of each individual tank.
  • a large covered aperture is provided for main access to the tank, which is sufiiciently large to accommodate a person desiring access to the interior of the tank for repairs, maintenance, etc.
  • several smaller apertures typically about a foot in diameter, are provided in the deck surrounding the cargo trunk through which buckets and tools may be lowered when necessary, and which are also used for venting potentially explosive gases from the interior prior to cleaning, by displacing such gases with inert carbon dioxide from the smoke stack.
  • the deck covers closing the smaller apertures are commonly known as Butterworth covers, and have heretofore consisted generally of a gasketed metal cover plate fastened to the deck by approximately a dozen bolts protruding from the deck, which pass through holes near the edge of the plate, whereby the plate may be screwed firmly to the deck by means of the corresponding number of nuts. Mounting and removing these cover plates is therefore a tedious and slow job. Furthermore, the threaded bolts protruding from the deck eventually become rusted due to the action of salt water on them, and must be replaced, which is another tedious welding job, and can only be done when the tank is gas free; it takes a day to gas free a tank.
  • Another object is to provide a latching plate having latch-operated means on the top side of the plate which extends through the plate in sealed relationship so that there is no possibility of inflammable liquid or explosive fumes escaping from the tank.
  • a further object is to provide a cover plate of the type described, with latching means capable of being adjusted to accommodate various deck thicknesses over a wide range.
  • a gasketed cover plate is provided with cam latching means essentially similar to those described in US. patent to Gravert, No. 2,996,318 for Cam Operated Quick Acting Pipe Coupler.
  • This particular type of cam latch has the advantage for the present purpose of providing a camlatch bearing surface which is in contact with the element which it engages over a large area, and not merely at a single point as in conventional cams.
  • Adjustable spacer means Eddkfi Patented May 18, 1965 ice are provided on the cam shaft, which by a simple transposition can be put on either side of the cam so as to adjust it for engaging decks of various thickness over a much wider range than the slope of the cam itself permits.
  • the cam shaft is also provided with special sealing means to ensure no leakage of fluid or gas through the cam mechanism itself.
  • the cam shaft is also provided with indicating means for indicating the open or closed position of the latch, since this cannot be seen from the exterior.
  • FIG. 1 is a top plan view of a cover according to the invention installed on a deck;
  • FIG. 2 is a sectional view taken on line 2-2 of FIG. 1;
  • FIG. 3 is a detail view of a cam latch and portion of the associated cover, taken in the direction of the arrow A in FIG. 2;
  • FIG. 4 is a detailed view of a cam latch showing the manner in which it is adjusted to accommodate a greater plate thickness.
  • the deck 2 of the vessel serves also as the top side of the storage tank, and is provided with a number of apertures which are to be covered with the cover plates of the invention, only one such aperture 3 being shown.
  • Cover plate 4 overlies and seals aperture -3, and is provided with a suitable number, for cx ample three, equi-spaced camlatches ro-tatably controlled by the rotary position of protruding control element 6, of which there is one for each cam latch.
  • These control elements are preferably provided with pointer means 7 which cooperate with suitable indicia on the cover to show whether the cam latch is in the open or closed position.
  • the under side of the cover plate 4 is provided with a suitable groove 10 near its rim for retaining a large O-ring 10a which serves as a gasket providing a tight seal between the cover and deck when the cover is clamped into place.
  • Control element 6 is provided with an aperture 8 through which a metal bar or pin can be inserted to provide sufficient force for tightening the cam latch when necessary.
  • the control element is fixed to a shaft 9 rotatable in a suitable circular aperture drilled through the cover 4.
  • O-rings 15 are seated in suitable gnooves in the shaft in order to effect a tight seal between the shaft and the cover plate 4 to prevent any possibility of leakage from the interior of the tank between the shaft 9 and its associated aperture.
  • gasket 5 may be placed under shoulder 5a, where it will be compressed by the clamping section of the cam lock to provide a very tight seal.
  • Shaft 9 has an extension 12, preferably somewhat reduced in diameter, to which is fixed cam latch 13, as by set screw 14 cooperating with axial groove 16 in extension 12, or by using a square shaft and square holes.
  • Two washers or circular shims 17 and 18 are also held on extension 12, the entire assembly above described being held together in any suitable manner, as by nut 19 screwed onto thread 21 at the end of the shaft extension, and preferably firmly held against rotation as by cotter pin 22.
  • the washers 17 and 18 may be of equal thickness, but are preferably of different thicknesses to provide for a greater width of adjustment. If the deckplate 2 is of greater relative thickness than shown in FIG. 2, shim 17 may be moved from the position shown in FIG. 2 to that shown in FIG. 4, in order to increase the effective clamping space of the cam; If still greater thickness is desired, the thicker washer 18 may be used instead, or for maximum thickness, both washers together may be moved between the cam and the cover plate.
  • the washer shims thus provide for a greater range in deck thicknesses than can be .efiiciently taken care of by the cam slope itself. In ship practice, the deck plates may run between inch and 1% inches in thickness, which can readily be taken care of by two washer shims as shown.
  • FIG. 4 shows the cam in the locked position, which the indicator point 7 on the control element shows by pointing in a generally outward position. If the control element is rotated 180 from the position shown in FIG. 4, it will be apparent that side 13a of the cam will be opposite the edge of the deck, providing ample clearance for removing the cover from the deck aperture. 7
  • an orifice cover comprising a removable metal cover plate; a continuous gasket firmly held on the underside of said cover plate for sealing said plate again-st said Wall;
  • cam pressure clamping means for securely seal-ingsa-id for rotating said. shaft, cam means rotatable with said shaft for clampingly engaging said deck between the under sideof said cover plate near the rim thereof and the cam face of said carn means, as said shaft is rotated; sealing means between said rotary means and said cover plate for preventing the passage of fluid or gas, said sealing means comprising at least one O-ring in an annular groove in said shaft andengaging the :wall of said aperture.
  • a closure for an orifice in a thick metal wall comprising a removable metal cover plate; a continuous gasket on the underside of said cover plate for sealing said plate against said wall; and cam pressure clamping means for securely fastening said cover plate in place under sufiicient pressure to efiectively compress said gasket between the cover plate and the wall, said clamping means comprising 7 rot-arymeans including a rotatable shaft passing through a circular aperture in said cover plate nearthe rim thereof, a rotation control element fixed to said shaft on the outer side of said cover plate for rotating said shaft, cam means rotatable with said s'haft for clampingrly engaging said metal wall between the underside of said cover plate near the rim thereof and the cam face of said cam means, as said shaft is rotated, said shaft extending through and beyond said cam means, said cam means being axially slida'ble with respect to said shaft but angularly fixed to the shaft for rotation therewith, retaining means at the end of said shaft for retaining said cam means thereon
  • control element having a'horizontal aperture therethrough for reception of a force-applying lever.
  • said shim washer means comprising two shim washers of different thickness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Closures For Containers (AREA)
  • Vehicle Body Suspensions (AREA)
  • Sealing Devices (AREA)
  • Gasket Seals (AREA)
US28886263 1963-06-17 1963-06-17 Closure plate for cargo tanker Expired - Lifetime US3184099A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US28886263 US3184099A (en) 1963-06-17 1963-06-17 Closure plate for cargo tanker
GB3705863A GB977925A (en) 1963-06-17 1963-09-20 Improvements in or relating to a closure plate for an orifice in a thick metal wall
NO150486A NO115016B (no) 1963-06-17 1963-10-17
DK553863A DK143325C (da) 1963-06-17 1963-11-26 Aftageligt daeksel til lukning af en aabning i skibsdaek,navnligen tankaabning
DE19641431305 DE1431305B1 (de) 1963-06-17 1964-02-22 Verriegelungsvorrichtung fuer Verschlussdeckel
ES0298713A ES298713A1 (es) 1963-06-17 1964-04-15 Perfeccionamientos en dispositivos de cierre para orificios en paredes metalicas gruesas
NL737301409A NL153648B (nl) 1963-06-17 1973-01-31 Afsluiting voor een opening in een dikke, metalen wand, bestaande uit een met behulp van klemorganen vastzetbare dekselplaat.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28886263 US3184099A (en) 1963-06-17 1963-06-17 Closure plate for cargo tanker

Publications (1)

Publication Number Publication Date
US3184099A true US3184099A (en) 1965-05-18

Family

ID=23108997

Family Applications (1)

Application Number Title Priority Date Filing Date
US28886263 Expired - Lifetime US3184099A (en) 1963-06-17 1963-06-17 Closure plate for cargo tanker

Country Status (6)

Country Link
US (1) US3184099A (no)
DE (1) DE1431305B1 (no)
DK (1) DK143325C (no)
ES (1) ES298713A1 (no)
GB (1) GB977925A (no)
NO (1) NO115016B (no)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349517A (en) * 1965-10-04 1967-10-31 Weather Seal Inc Window assembly including a storm sash and storm sash latch
US3891119A (en) * 1974-06-24 1975-06-24 Emco Ltd Manhole cover lock
US4059202A (en) * 1977-03-09 1977-11-22 Mobil Oil Corporation Cover plate having adjustable latch means
US5788406A (en) * 1996-04-17 1998-08-04 S. Bravo Systems, Inc. Double pivot semi-automatic manhole cover lifting device
DE102013011835B3 (de) * 2013-07-16 2014-10-02 Peter Landschütz Verschluß
US20200248859A1 (en) * 2017-08-16 2020-08-06 Rosen Swiss Ag Closure apparatus
US20210351577A1 (en) * 2020-05-06 2021-11-11 Michael W. Hicok Electrical panel cover fastening system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3113107C2 (de) * 1981-04-01 1984-12-13 Anton Hummel Gmbh Metallwarenfabrik, 7808 Waldkirch Abdichtvorrichtung
EP0614031A1 (en) * 1993-03-04 1994-09-07 Viplex Groep B.V. Flange-coupling for a tank
CN110498015B (zh) * 2019-09-05 2020-07-31 东阳市智林科技有限公司 一种高效锁定舱口盖及其调节方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US549843A (en) * 1895-11-12 Door for bulk-heads or compartments of ships
US1198166A (en) * 1914-05-14 1916-09-12 Edward W Stoddard Retainer for container-closures.
US2263843A (en) * 1937-09-03 1941-11-25 Binks Mfg Co Container connecting means for spraying devices
US2334012A (en) * 1941-11-06 1943-11-09 Cutler Hammer Inc Enclosing casing for electrical control devices
US2645513A (en) * 1947-12-31 1953-07-14 Vance C Sterrett Cylinder construction

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB336489A (en) * 1929-12-04 1930-10-16 John Alexander Bonnyman Improved cargo hatch cover
GB474548A (en) * 1936-01-22 1937-11-03 Breeze Corp Latch for bulkhead door
GB581749A (en) * 1944-04-04 1946-10-23 Robert Stanley Chipchase Improvements in or relating to fluid-tight doors, escape hatches, or the like
US2460961A (en) * 1944-09-29 1949-02-08 Wilson Mfg Company Quick-acting securing means for watertight doors
GB751678A (en) * 1954-07-16 1956-07-04 Edmund Hannay Watts Doors and means for securing them

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US549843A (en) * 1895-11-12 Door for bulk-heads or compartments of ships
US1198166A (en) * 1914-05-14 1916-09-12 Edward W Stoddard Retainer for container-closures.
US2263843A (en) * 1937-09-03 1941-11-25 Binks Mfg Co Container connecting means for spraying devices
US2334012A (en) * 1941-11-06 1943-11-09 Cutler Hammer Inc Enclosing casing for electrical control devices
US2645513A (en) * 1947-12-31 1953-07-14 Vance C Sterrett Cylinder construction

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349517A (en) * 1965-10-04 1967-10-31 Weather Seal Inc Window assembly including a storm sash and storm sash latch
US3891119A (en) * 1974-06-24 1975-06-24 Emco Ltd Manhole cover lock
US4059202A (en) * 1977-03-09 1977-11-22 Mobil Oil Corporation Cover plate having adjustable latch means
US5788406A (en) * 1996-04-17 1998-08-04 S. Bravo Systems, Inc. Double pivot semi-automatic manhole cover lifting device
DE102013011835B3 (de) * 2013-07-16 2014-10-02 Peter Landschütz Verschluß
US20200248859A1 (en) * 2017-08-16 2020-08-06 Rosen Swiss Ag Closure apparatus
US12013073B2 (en) * 2017-08-16 2024-06-18 Rosen Swiss Ag Closure apparatus
US20210351577A1 (en) * 2020-05-06 2021-11-11 Michael W. Hicok Electrical panel cover fastening system
US11955787B2 (en) * 2020-05-06 2024-04-09 Michael W. Hicok Electrical panel cover fastening system

Also Published As

Publication number Publication date
DK143325C (da) 1981-12-07
DE1431305B1 (de) 1971-05-13
NO115016B (no) 1968-07-01
GB977925A (en) 1964-12-16
DK143325B (da) 1981-08-10
ES298713A1 (es) 1964-12-01

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