US3653533A - Door assembly - Google Patents

Door assembly Download PDF

Info

Publication number
US3653533A
US3653533A US3653533DA US3653533A US 3653533 A US3653533 A US 3653533A US 3653533D A US3653533D A US 3653533DA US 3653533 A US3653533 A US 3653533A
Authority
US
United States
Prior art keywords
door
lug members
annular
spaced
lugs
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
Inventor
Peder Mortensen
Original Assignee
Peder Mortensen
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 Peder Mortensen filed Critical Peder Mortensen
Priority to US86916969A priority Critical
Application granted granted Critical
Publication of US3653533A publication Critical patent/US3653533A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • A47J27/08Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/0804Locking devices
    • A47J27/0806Locking devices of the bayonet-type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J13/00Covers or similar closure members for pressure vessels in general
    • F16J13/02Detachable closure members; Means for tightening closures
    • F16J13/12Detachable closure members; Means for tightening closures attached by wedging action by means of screw-thread, interrupted screw-thread, bayonet closure, or the like

Abstract

A door construction for an opening in a pressure vessel, including an annular collar into which a door member is seated when in the closed position. The door member carries a rotatable locking ring having radially disposed circumferentially spaced lugs which cooperate with lugs on the collar to lock the door in the closed position.

Description

United States Patent Mortensen [45] Apr. 4, 1972 [54] DOOR ASSEMBLY [21] App1.No.: 869,169

FOREIGN PATENTS OR APPLICATIONS 91 1,565 5/1954 Germany ..220/40 R 565,307 I 1/ 1944 Great Britain ..220/40 R 408,569 9/1966 Switzerland ..220/40 R Primary Examiner-Joseph R. Leclair Assistant Examiner-James R. Garrett Attorney-Chittick, Pfund, Birch, Samuels & Gauthier [5 7] ABSTRACT 5 Claims, 5 Drawing Figures [52] U.S. Cl. ..220/40 R, 220/46 P [51] InLCI ..B65d 41/06 [52%| Field of Search ..220/40 R, 46 P, 46 R; 292/256, 292/256.6; 285/362, 377

I56] References Cited UNITED STATES PATENTS 1,603,903 10/1926 Church ..220/46 P 1,997,858 4/1935 Clawson 285l362 2,936,093 5/1960 Passalaqua..... ..220/40 R "52 ii A? 4 are noon ASSEMBLY DESCRIPTION OF THE INVENTION This invention relates generally to door constructions for pressure vessels, and is particularly concerned with an improved fast-acting means for locking a door member in theclosed position.

The known prior art door constructions which are already in use for the most part rely on cooperating cam surfaces on locking rings, split collars, etc. to push a door member into sealing engagement with a resilient seal surrounding the opening in the vessel wall. Considerable force is required to rotate or otherwise position the locking cams. Moreover, the cam surfaces must necessarily be accurately machined in order to produce the desired even sealing force around the entire circumference of the door. These factors each tend to increase the overall cost of such prior art door assemblies.

It is accordingly a primary object of the present invention to obviate the aforementioned difficulties by locking the door member in the closed position without employing cooperating cam surfaces. To this end, the opening in a pressure vessel is surrounded by a collar which is provided with a plurality of circumferentially spaced inwardly extending radial lugs which cooperate with radial lugs on a rotatable locking ring carried by the door member to lock the door member in the closed position. The two sets of lugs remain spaced apart in two separate planes until such time as the interior of the vessel is pressurized. The vessel pressure has a tendency to push the door member outwardly, thus causing the lugs on the locking ring to abut the lugs on the surrounding collar, thus insuring that the door member remains securely locked in place. Since the lugs on the locking ring are spaced from the lugs on the collar when the ring is rotated to the locked position, only minimum force is required to rotate the ring. Furthermore, the machining costs are considerably reduced since cam surfaces are not employed in the instant arrangement.

These and other objectives and advantages of the present invention will become more apparent as the description proceeds with the aid of the accompanying drawings wherein:

FIG. I is a side elevation of a pressure vessel employing a door construction constructed in accordance with the present invention;

FIG. 2 is a perspective view of the apparatus shown in FIG. 1 with the door member in the open position;

FIG. 3 is a sectional view taken along lines 33 of FIG. 1;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3 with the locking ring in the unlocked position; and,

FIG. 5 is a view similar to FIG. 4 showing the locking ring rotated to the locked position.

Referring now to the drawings with initial attention to FIGS. 1 and 2, there is shown a pressure vessel generally indicated at having a cylindrical wall 12, the upper end of which is closed by a door member 14. The door member is provided with a bracket 16 which is pivotally attached as at 18 to a mounting bracket 20 extending upwardly and angularly from the vessel wall 12. In order to facilitate opening and closing of the door member, bracket 16 is preferably provided at its distal end with a counterweight 22.

The locking agreement which comprises the essence of the present invention will now be described in more detail with additional reference to FIGS. 3 to 5. The cylindrical vessel wall 12 is provided at its upper end with a collar 24. The collar includes an annular somewhat horizontally disposed shelf defining stepped surfaces 26 and 28 separated by a groove 30 containing a flexible lip seal 32.

Collar 24 further includes a vertically extending wall section 34 which is provided with a plurality of circumferentially spaced first lug members 36 extending radially inwardly therefrom.

Door member 14 is provided with a peripheral lip 38 from which a plurality of circumferentially spaced second" lug members 40 extend radially. The circumferential spacing of the second lug members 40 is such that they will pass between the first lug members 36 on the wall section 34 of collar 24 when the door member 14- is moved between the open position as shown in FIG. 2 and in the closed position as shown in the remainder of the drawings.

Door member 14 carries a rotatable locking ring 42. The locking ring is also provided with a plurality of circumferentially spaced radially extending third" lug members 44. The dimensions and circumferential spacing of lug members 44 is identical to that of the underlying lug members 40 on the door member 14. Thus, and as is best shown in FIG. 4, when the locking ring is'rotated to the unlocked position, lugs 44 directly overlie lugs 40 with the result that both sets of lugs may pass between the inwardly disposed lugs 36 on collar member 24 when the door is opened and closed.

Rotation of the locking ring is accomplished by means of a double acting cylinder assembly 46, preferably pneumatically actuated, which is attached at one end as at 48 to bracket 16, and at the other end as at 50 to the upstanding leg 52 on the locking ring.

The door construction operates as follows: beginning with the condition shown in FIG. 2 with the door member 14 in the open position, it will be understood that cylinder assembly 46 has been actuated to rotatably adjust the locking ring 42 to the unlocked" position as depicted in FIG. 4. The door member is then swung downwardly to the closed position to completely enclose the interior of pressure vessel 10. At this point, the lower face 54 (see FIG. 3) on the peripheral lip 38 of the door member will be in contact with the upper surface 56 of seal 32, the latter having an inwardly disposed lip section 58 overlying the lower stepped surface 28 on collar 24.

It is important to observe that at this point, the vertical spacing between the flexible seal surface 56 and the inwardly disposed lugs 36 is such that there exists a clearance 60 (see FIG. 3) between the underside of lugs 36 and the top side of lugs 44. This clearance enables the locking ring 42 to be rotated relative to door member 14 to the locked" position shown in FIG. 5 with an absolute minimum effort. When in the locked position, lugs 44 underlie lugs 36, thus effectively preventing the door member from opening as the vessel 10 is pressurized.

As the interior pressure of the vessel increases, the door member 14 is pushed up slightly until the lugs 44 contact lugs 36 and the clearance 60 is dissipated. This slight upward movement of the door is compensated for by the resilient lip section 58 on resilient seal 32. The lip section 58 is actually forced upwardly under pressure along with the door member, thus insuring an uninterrupted continuous seal.

vWhen the door member is to be opened, the above outlined procedure is simply reversed after the interior pressure of the vessel has been reduced to atmospheric pressure.

Having thus described a preferred embodiment of the invention, it will be apparent to those skilled in the art that minor modifications may be made without departing from the spirit and scope of the invention as claimed in the following claims.

I claim:

1. A door assembly for an opening in a pressure vessel comprising in combination: an annular collar surrounding said opening, said collar having circumferentially spaced first lug members extending radially inwardly therefrom toward said opening; a non-rotatable door member mounted on said vessel for movement between an open position allowing access into the interior of said vessel through said opening and a closed position closing said opening; circumferentially spaced second lug members extending radially outwardly from said door member; a locking ring circumferentially mounted about said door member for rotation between a locked an an unlocked position; circumferentially spaced third lug members extending radially outwardly form said locking ring, said third lug members being aligned vertically with said second lug members when said locking ring is in the unlocked position, said second and third lug members being suitably dimensioned and circumferentially spaced to pass between said first lug members when said door member is moved between said open and closed positions, said second and third lug members lying in separate planes spaced beneath the plane of said first lug members when said door member is in the closed position prior to the interior of said vessel being pressurized, whereupon rotation of said locking ring to the locked position will result in said third lug members being corresponding rotated to positions partially underlying and spaced beneath said first lug members, and partially overlying and spaced above said second lug members.

2. The apparatus as claimed in claim 1 further characterized by said collar having an annular ledge spaced beneath said first lug members, and a flexible seal mounted on said ledge, said door member being in contact with said seal when in the closed position.

3. The apparatus as set forth in claim 2 further characterized by said annular ledge being made up of a first annular surface raised vertically above a radially inwardly disposed second annular surface, said first and second annular surfaces being separated by a groove in which is seated said flexible seal.

4. The apparatus as set forth in claim 3 further characterized by said flexible seal having a radially inwardly extending lip section overlying and spaced above said second annular section on said annular ledge.

5. The apparatus as set forth in claim 4 further characterized by the vertical spacing between said flexible seal and said first lugs being sufficient to accommodate rotation of said locking rings with said third lugs remaining spaced beneath said first lugs.

Claims (5)

1. A door assembly for an opening in a pressure vessel comprising in combination: an annular collar surrounding said opening, said collar having circumferentially spaced first lug members extending radially inwardly therefrom toward said opening; a non-rotatable door member mounted on said vessel for movement between an open position allowing access into the interior of said vessel through said opening and a closed position closing said opening; circumferentially spaced second lug members extending radially outwardly from said door member; a locking ring circumferentially mounted about said door member for rotation between a locked an an unlocked position; circumferentially spaced third lug members extending radially outwardly form said locking ring, said third lug members being aligned vertically with said second lug members when said locking ring is in the unlocked position, said second and third lug members being suitably dimensioned and circumferentially spaced to pass between said first lug members when said door member is moved between said open and closed positions, said second and third lug members lying in separate planes spaced beneath the plane of said first lug members when said door member is in the closed position prior to the interior of said vessel being pressurized, whereupon rotation of said locking ring to the locked position will result in said third lug members being corresponding rotated to positions partially underlying and spaced beneath said first lug members, and partially overlying and spaced above said second lug members.
2. The apparatus as claimed in claim 1 further characterized by said collar having an annular ledge spaced beneath said first lug members, and a flexible seal mounted on said ledge, said door member being in contact with said seal when in the closed position.
3. The apparatus as set forth in claim 2 further characterized by said annular ledge being made up of a first annular surface raised vertically above a radially inwardly disposed second annular surface, said first and second annular surfaces being separated by a groove in which is seated said flexible seal.
4. The apparatus as set forth in claim 3 further characterized by said flexible seal having a radially inwardly extending lip section overlying and spaced above said second annular section on said annular ledge.
5. The apparatus as set forth in claim 4 further characterized by the vertical spacing between said flexible seal and said first lugs being sufficient to accommodate rotation of said locking rings with said third lugs remaining spaced beneath said first lugs.
US3653533D 1969-10-24 1969-10-24 Door assembly Expired - Lifetime US3653533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US86916969A true 1969-10-24 1969-10-24

Publications (1)

Publication Number Publication Date
US3653533A true US3653533A (en) 1972-04-04

Family

ID=25353055

Family Applications (1)

Application Number Title Priority Date Filing Date
US3653533D Expired - Lifetime US3653533A (en) 1969-10-24 1969-10-24 Door assembly

Country Status (2)

Country Link
US (1) US3653533A (en)
CA (1) CA935122A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3830400A (en) * 1972-12-04 1974-08-20 Wsf Ind Inc Warning device for high pressure vessels
US4688476A (en) * 1986-06-11 1987-08-25 Lyco Manufacturing, Inc. Industrial food processing machine
EP0577863A1 (en) * 1992-07-04 1994-01-12 SIGMA LABORZENTRIFUGEN GmbH Casing for centrifuge
EP1267637A2 (en) * 2000-04-07 2003-01-02 Jian, Wei Wen Pressure cooker
EP1370465A2 (en) * 1999-09-08 2003-12-17 Sail Star Inc. Closure system for a pressure vessel
US20040164078A1 (en) * 2003-02-20 2004-08-26 Brian Smith Closure apparatus and method of closing an opening
US20080314903A1 (en) * 2004-09-09 2008-12-25 Olcon Engineering Ab Gas-Tight Transport Container for Detonation-Dangerous Material
US20110031249A1 (en) * 2008-10-30 2011-02-10 Fissler Gmbh Pressure vessel
US8596697B1 (en) 2009-10-16 2013-12-03 Sypris Technologies, Inc. Actuated breach lock
US20150321835A1 (en) * 2013-07-26 2015-11-12 Infiltrator Systems, Inc. Molded plastic water storage tank
US20160353915A1 (en) * 2015-06-02 2016-12-08 Seb S.A. Bayonet fitting pressure cooker provided with guide elements
US20170172335A1 (en) * 2014-03-26 2017-06-22 Seb S.A. Pressure cooker having bayonet mount and related manufacturing method
US10420436B2 (en) 2015-06-02 2019-09-24 Seb S.A. Pressure cooker provided with a manual control for controlling locking
US10448777B2 (en) 2015-06-02 2019-10-22 Seb S.A. Bayonet-fitting pressure cooker provided with a vessel handle
US10542836B2 (en) 2015-03-26 2020-01-28 Seb S.A. Bayonet pressure cooker and a corresponding method of fabrication

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1603903A (en) * 1925-09-28 1926-10-19 Jackson & Church Company Gasket construction for cylinder heads
US1997858A (en) * 1933-10-07 1935-04-16 Philip E Clawson Coupling
GB565307A (en) * 1943-05-05 1944-11-06 Edwin Danks And Company Oldbur Improvements in closure means for pressure vessels
DE911565C (en) * 1952-12-20 1954-05-17 Koerting Maschinen Und Appbau Quick closure for closing an opening at kreisfoermigen boilers and tanks
US2936093A (en) * 1955-04-13 1960-05-10 Sparkler Mfg Co Quick opening tank
CH408569A (en) * 1963-02-22 1966-02-28 Krantz H Fa Quick closure for pressure vessels

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1603903A (en) * 1925-09-28 1926-10-19 Jackson & Church Company Gasket construction for cylinder heads
US1997858A (en) * 1933-10-07 1935-04-16 Philip E Clawson Coupling
GB565307A (en) * 1943-05-05 1944-11-06 Edwin Danks And Company Oldbur Improvements in closure means for pressure vessels
DE911565C (en) * 1952-12-20 1954-05-17 Koerting Maschinen Und Appbau Quick closure for closing an opening at kreisfoermigen boilers and tanks
US2936093A (en) * 1955-04-13 1960-05-10 Sparkler Mfg Co Quick opening tank
CH408569A (en) * 1963-02-22 1966-02-28 Krantz H Fa Quick closure for pressure vessels

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3830400A (en) * 1972-12-04 1974-08-20 Wsf Ind Inc Warning device for high pressure vessels
US4688476A (en) * 1986-06-11 1987-08-25 Lyco Manufacturing, Inc. Industrial food processing machine
EP0577863A1 (en) * 1992-07-04 1994-01-12 SIGMA LABORZENTRIFUGEN GmbH Casing for centrifuge
EP1370465A2 (en) * 1999-09-08 2003-12-17 Sail Star Inc. Closure system for a pressure vessel
EP1370465A4 (en) * 1999-09-08 2006-07-19 Sail Star Inc Closure system for a pressure vessel
EP1267637A2 (en) * 2000-04-07 2003-01-02 Jian, Wei Wen Pressure cooker
EP1267637A4 (en) * 2000-04-07 2008-04-16 Guangdong Elecpro Electric App Pressure cooker
US20040164078A1 (en) * 2003-02-20 2004-08-26 Brian Smith Closure apparatus and method of closing an opening
US6886709B2 (en) * 2003-02-20 2005-05-03 General Signal Uk Limited Closure apparatus and method of closing an opening
US20080314903A1 (en) * 2004-09-09 2008-12-25 Olcon Engineering Ab Gas-Tight Transport Container for Detonation-Dangerous Material
US8365938B2 (en) * 2004-09-09 2013-02-05 Dynasafe International Ab Gas-tight transport container for detonation-dangerous material
US20110031249A1 (en) * 2008-10-30 2011-02-10 Fissler Gmbh Pressure vessel
US8517205B2 (en) * 2008-10-30 2013-08-27 Fissler Gmbh Pressure vessel
US8596697B1 (en) 2009-10-16 2013-12-03 Sypris Technologies, Inc. Actuated breach lock
US20150321835A1 (en) * 2013-07-26 2015-11-12 Infiltrator Systems, Inc. Molded plastic water storage tank
US9889986B2 (en) * 2013-07-26 2018-02-13 Infiltrator Water Technologies, Llc. Molded plastic water storage tank
US20170172335A1 (en) * 2014-03-26 2017-06-22 Seb S.A. Pressure cooker having bayonet mount and related manufacturing method
US10542836B2 (en) 2015-03-26 2020-01-28 Seb S.A. Bayonet pressure cooker and a corresponding method of fabrication
US10244883B2 (en) * 2015-06-02 2019-04-02 Seb S.A. Bayonet-fitting pressure cooker provided with guide elements
US10420436B2 (en) 2015-06-02 2019-09-24 Seb S.A. Pressure cooker provided with a manual control for controlling locking
US10448777B2 (en) 2015-06-02 2019-10-22 Seb S.A. Bayonet-fitting pressure cooker provided with a vessel handle
US20160353915A1 (en) * 2015-06-02 2016-12-08 Seb S.A. Bayonet fitting pressure cooker provided with guide elements

Also Published As

Publication number Publication date
CA935122A1 (en)
CA935122A (en) 1973-10-09

Similar Documents

Publication Publication Date Title
JP6148639B2 (en) Pressure cooker for microwave oven
US3369691A (en) Stacked food containers
EP0548644B1 (en) Closure for wide-necked plastic drum
US4387740A (en) Cam-flange
US4059198A (en) Vapor-seal safety cap and container
US4940167A (en) Child resistant dispensing closure
US3882919A (en) Safety rim
US3854582A (en) Closure and container
US2065293A (en) Lined drum
EP0073821B1 (en) Plastic closure and related container finish
US4171749A (en) Pourer closure
US4682707A (en) Container having a tamper proof lid
GB1267687A (en) Container and cover therefor
CA2093876A1 (en) Child resistant reminder closure
US3885696A (en) Closure construction for container with lid
SE9203177D0 (en) Closure assembly with separable seal
ES469691A1 (en) Closures for containers
DK147571B (en) Pressure cooker
CA2315574A1 (en) Floor box cover assembly
GB1338336A (en) Lid locking device for containers having relatively large aperture
MX9307318A (en) Closure assembly coated insert.
GB1372546A (en) Container closure constructions
US2114499A (en) Manhole cover
US4627417A (en) Steam pressure cooker
ES255418U (en) Linerless closure for pressurized container