US3394834A - Single-locking closure plate for cargo tankers - Google Patents

Single-locking closure plate for cargo tankers Download PDF

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Publication number
US3394834A
US3394834A US649989A US64998967A US3394834A US 3394834 A US3394834 A US 3394834A US 649989 A US649989 A US 649989A US 64998967 A US64998967 A US 64998967A US 3394834 A US3394834 A US 3394834A
Authority
US
United States
Prior art keywords
cover plate
deck
cover
spider
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
US649989A
Other languages
English (en)
Inventor
Irving L Cigliano
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 US649989A priority Critical patent/US3394834A/en
Priority to GB53139/67A priority patent/GB1206806A/en
Priority to GR670134822A priority patent/GR34822B/el
Priority to CH1716967A priority patent/CH464724A/de
Priority to FR1548817D priority patent/FR1548817A/fr
Priority to NL6717226A priority patent/NL6717226A/xx
Priority to DE1531645A priority patent/DE1531645C3/de
Priority to BE710604D priority patent/BE710604A/xx
Application granted granted Critical
Publication of US3394834A publication Critical patent/US3394834A/en
Priority to NL7214154A priority patent/NL7214154A/xx
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
    • 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
    • F16J13/14—Detachable closure members; Means for tightening closures attached exclusively by spring action or elastic action
    • 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
    • F16J13/04—Detachable closure members; Means for tightening closures attached with a bridge member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/22—Drums; Headers; Accessories therefor
    • F22B37/221—Covers for drums, collectors, manholes or the like

Definitions

  • This invention relates to a closure plate for cargo tankers, of the same general type as shown in US. Patent No. 3,184,099 to Gravert.
  • the Gravert closure plate requires three separate cam latching operations to firmly lock the lid in place
  • the present cover plate is of simplified construction, and requires only a single latching operation to provide the same result.
  • Oil tankers and similar vessels having large below-deck tanks are commonly provided, in addition to a large covered aperture for access to the interior of each tank, with a number of smaller apertures, typically round holes about a foot or slightly more in diameter, through which buckets and tools may be lowered when necessary.
  • the deck covers closing the smaller apertures are commonly known as Butterworth covers and have heretofore generally consisted of a gasketed cover plate vfastened to the deck by approximately a dozen bolts protruding from the deck for screwing the cover firmly to the deck by means of nuts.
  • the above-mentioned Patent No. 3,184,099 shows an improved cover plate having three separate cam latching elements attached to the cover plate, each of which must be operated to firmly latch the cover plate in place.
  • the improved cover plate of the present invention provides a gasketed cover plate which can be set down on the smooth deck so as to cover the aperture, and which has a spider, with three or four legs, on the underside, which spider is arranged to be clamped against the underside of the deck so as to firmly secure the cover plate in place, the clamping being accomplished by simply rotating a centrally-located cam handle on the upper side of the cover plate from a vertical position to a horizontal position where it is substantially flush with the top of the cover plate.
  • FIG. 1 is a view partly in section, taken on line 11 of FIG. 3, showing the cover plate in place, before the clamp is operated;
  • FIG. 2 is a view similar to FIG. 1, showing the same cover plate in place after the clamp has been operated and the cover plate is firmly secured;
  • FIG. 3 is a top plan view of the cover plate as shown in FIG. 2.
  • the Butterworth cover of the invention is indicated generally at 4, and consists of a top plate 6 having a circumferential gasket 7 of any suitable gasket material, such that when the plate is firmly fastened to the deck, the cover is tightly sealed.
  • Extending through the center of the cover plate is a shaft 8, which is slidable in but closely fitted to a central aperture in the plate 6 through which it extends.
  • the shaft is preferably provided with suitable gasketing means as indicated at 9, to form as tight a seal as possible against egress of liquid or vapors or ingress of water through the central bore in the cover plate 6.
  • Shaft 8 carries at its end a spider 11, having three legs as best shown in FIG. 3, although a different number, e.g. two or four legs, could also be used in a given case.
  • the legs ar retained on the end of the shaft by any suitable means indicated as a pin 13, although any other retaining means, e.g. a nut arrangement on a threaded portion of the shaft, could also be used, and would have the advantage of being adjustable for different thicknesses of deck plates.
  • Each leg 12 of the spider is preferably provided at the end thereof with a suitable pressure pad 14 for engaging the underside of the deck, both to insure adequate friction, and also to provide a certain amount of resilience.
  • shaft 8 is provided with a pivot 16 on which is mounted cam handle 17 provided with a cam 18 of such configuration that when the cam handle 17 is in the vertical position shown in FIG. 1, the spider is downwardly displaced the maximum amount so as to provide a gap between gasket 7 and pads 14 sufficient so that the cover can easily be slid into place as shown in FIG. 1.
  • a closure for an orifice in a thick metal wall comprising (a) a removable metal cover plate large enough to cover said orifice and having a continuous gasket on one side thereof for sealing the plate against said Wall, having a substantially centrally located aperture,
  • said force multiplying means comprising manually operable cam means.
  • said cam means comprising a cam-operating handle extending away from said cover plate in the unclamped position of said spider, said handle lying flush with said cover plate in the clamped position of said spider.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Closures For Containers (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Gasket Seals (AREA)
US649989A 1967-06-29 1967-06-29 Single-locking closure plate for cargo tankers Expired - Lifetime US3394834A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US649989A US3394834A (en) 1967-06-29 1967-06-29 Single-locking closure plate for cargo tankers
GB53139/67A GB1206806A (en) 1967-06-29 1967-11-22 A closure for an orifice in a metal wall
GR670134822A GR34822B (el) 1967-06-29 1967-11-29 Πλαξ κλεισιματος απλης μανδαλωσεως δια φορτηγα δεξαμενοπλοια.
CH1716967A CH464724A (de) 1967-06-29 1967-12-06 Schnellverschluss
FR1548817D FR1548817A (it) 1967-06-29 1967-12-07
NL6717226A NL6717226A (it) 1967-06-29 1967-12-18
DE1531645A DE1531645C3 (de) 1967-06-29 1967-12-30 Verschlußdeckel für Öffnungen in Metallwänden
BE710604D BE710604A (it) 1967-06-29 1968-02-09
NL7214154A NL7214154A (it) 1967-06-29 1972-10-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US649989A US3394834A (en) 1967-06-29 1967-06-29 Single-locking closure plate for cargo tankers

Publications (1)

Publication Number Publication Date
US3394834A true US3394834A (en) 1968-07-30

Family

ID=24607042

Family Applications (1)

Application Number Title Priority Date Filing Date
US649989A Expired - Lifetime US3394834A (en) 1967-06-29 1967-06-29 Single-locking closure plate for cargo tankers

Country Status (8)

Country Link
US (1) US3394834A (it)
BE (1) BE710604A (it)
CH (1) CH464724A (it)
DE (1) DE1531645C3 (it)
FR (1) FR1548817A (it)
GB (1) GB1206806A (it)
GR (1) GR34822B (it)
NL (1) NL6717226A (it)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563406A (en) * 1969-06-10 1971-02-16 Bfg Marine Supply Co Inc Closure unit
US3874550A (en) * 1973-06-21 1975-04-01 Jerry D Gordon Access door for cylinder
US4132327A (en) * 1978-05-01 1979-01-02 Acf Industries, Inc. Hatch cover opening and closing assembly
US4848034A (en) * 1988-05-24 1989-07-18 The Boeing Company Quick-release latch and access door
US5004119A (en) * 1989-07-31 1991-04-02 Augerscope, Inc. Drain sealing apparatus
US5533641A (en) * 1993-10-12 1996-07-09 Argandona; Toby Locking cover assembly
AU2013203162B2 (en) * 2011-02-02 2015-01-29 Load And Move Pty Ltd An improved container lid

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583836B1 (fr) * 1985-06-21 1987-08-07 Ego France Dispositif de fixation d'un tampon obturant une ouverture
JP6846461B2 (ja) * 2019-05-31 2021-03-24 本田技研工業株式会社 カウルトップ構造

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1194080A (en) * 1916-08-08 Aethur h
US1526263A (en) * 1923-12-31 1925-02-10 William G Wilson Handhole cap

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1194080A (en) * 1916-08-08 Aethur h
US1526263A (en) * 1923-12-31 1925-02-10 William G Wilson Handhole cap

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563406A (en) * 1969-06-10 1971-02-16 Bfg Marine Supply Co Inc Closure unit
US3874550A (en) * 1973-06-21 1975-04-01 Jerry D Gordon Access door for cylinder
US4132327A (en) * 1978-05-01 1979-01-02 Acf Industries, Inc. Hatch cover opening and closing assembly
US4848034A (en) * 1988-05-24 1989-07-18 The Boeing Company Quick-release latch and access door
US5004119A (en) * 1989-07-31 1991-04-02 Augerscope, Inc. Drain sealing apparatus
US5533641A (en) * 1993-10-12 1996-07-09 Argandona; Toby Locking cover assembly
AU2013203162B2 (en) * 2011-02-02 2015-01-29 Load And Move Pty Ltd An improved container lid

Also Published As

Publication number Publication date
DE1531645C3 (de) 1974-01-10
NL6717226A (it) 1968-12-30
GR34822B (el) 1968-07-03
CH464724A (de) 1968-10-31
GB1206806A (en) 1970-09-30
BE710604A (it) 1968-06-17
FR1548817A (it) 1968-12-06
DE1531645B2 (de) 1973-05-30
DE1531645A1 (de) 1970-01-22

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