US3694960A - Door assembly and chamber combination - Google Patents

Door assembly and chamber combination Download PDF

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Publication number
US3694960A
US3694960A US64776A US3694960DA US3694960A US 3694960 A US3694960 A US 3694960A US 64776 A US64776 A US 64776A US 3694960D A US3694960D A US 3694960DA US 3694960 A US3694960 A US 3694960A
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United States
Prior art keywords
door
plungers
opening
chamber
enclosure
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Expired - Lifetime
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US64776A
Inventor
Peter Thomas Miraldi
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American Sterilizer Co
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American Sterilizer Co
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Assigned to MORGAN GUARANTY TRUST COMPANY reassignment MORGAN GUARANTY TRUST COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMERICAN STERILIZER COMPANY, A PA CORP.
Anticipated expiration legal-status Critical
Assigned to AMERICAN STERILIZER COMPANY reassignment AMERICAN STERILIZER COMPANY RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: MORGAN GUARANTY TRUST COMPANY OF NEW YORK
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
    • E06B5/12—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes against air pressure, explosion, or gas
    • E06B5/14—Gasproof doors or similar closures; Adaptation of fixed constructions therefor
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00—Suspension arrangements for wings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00—Suspension arrangements for wings
    • E05D15/16—Suspension arrangements for wings for wings sliding vertically more or less in their own plane
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D2700/00—Hinges or other suspension devices especially for doors or windows
    • E05D2700/12—Suspension devices for doors or windows movable in a direction perpendicular to their plane or pivotable about an axis being situated at a considerable distance from the edge of the wing by means of pivot arms
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors

Definitions

  • said steam jacket and said chamber being welded to said rear wall around said opening, and said enclosure extending upwardly above said sterilizer chamber.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

The specification discloses a door assembly and chamber combination. The door is disposed in a door chamber at the front of the sterilizing chamber and a lifting mechanism is provided for the door. A clamping mechanism is provided for clamping the door to a seal around an opening to the chamber. The door chamber is made up of a front plate and a rear plate, each of which have an opening aligned with the other and the door slides between these openings and is forced into engagement with a rearwardly facing seal attached to the front plate. A clamping arrangement made of plungers spaced around the opening and fixed to the back plate provided with chains and sprockets driven by an electric motor which forces the plungers into engagement with the door and causes it to seal against the seal. The door is counterweighted and a lifting motor is provided to lift the door out of the space between the two openings.

Description

United States Patent Miraldi [54] DOOR ASSEMBLY AND CHAMBER COMBINATION [72] Inventor: Peter Thomas Miraldi, Erie, Pa.
[73] Assignee: American Sterilizer Company, Erie,
[22] Filed: Aug. 18, 1970 [21] Appl. No.: 64,776
[52] US. Cl. ..49/209, 49/210, 49/213 [51] Int. Cl. ..E05d 15/10 [58] Field ofSearch ..49/209,2lO,2ll,213,214, 49/395 [56] References Cited UNITED STATES PATENTS 2,313,095 3/ 1943 Schneider ..49/2l0 3,436,861 4/1969 Koch ..49/395 FOREIGN PATENTS OR APPLICATIONS 431,007 3/1967 Switzerland ..49/395 1 Oct. 3, 1972 Primary Examiner-Kenneth Downey Att0rneyCharles L. Lovercheck ABSTRACT The specification discloses a door assembly and chamber combination. The door is disposed in a door chamber at the front of the sterilizing chamber and a lifting mechanism is provided for the door. A clamping mechanism is provided for clamping the door to a seal around an opening to the chamber. The door chamber is made up of a front plate and a rear plate, each of which have an opening aligned with the other and the door slides between these openings and is forced into engagement with a rearwardly facing seal attached to the front plate. A clamping arrangement made of plungers spaced around the opening and fixed to the back plate provided with chains and sprockets driven by an electric motor which forces the plungers into engagement with the door and causes it to seal against the seal. The door is counterweighted and a lifting motor is provided to lift the door out of the space between the two openings.
7 Claims, 6 Drawing Figures PATENTEDnm 3 m2 SHEET 1 OF 4 PETER T MIRALDI SHEET 3 0F 4 PA'IENTEDBM m2 3mm PETER T. Ml RALDI oooooooooooo DOOR ASSEMBLY AND CHAMBER COMBINATION STATEMENT OF INVENTION This invention relates to sterilizing chambers and, more particularly, to an improved door and operating mechanism in combination with the sterilizer chamber.
OBJECTS OF THE INVENTION It is an object of the invention to provide an improved sterilizer chamber.
Another object of the invention is to provide a sterilizer chamber and door operating mechanism that is simple in construction, economical to manufacture, and simple and efficient to use.
Another object of the invention is to provide an improved door operating and sealing mechanism.
GENERAL DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of the sterilizer according to the invention.
FIG. 2 is a cross sectional view taken on line 2-2 of FIG. 1.
FIG. 3 is a cross sectional view similar to FIG. 2, taken on line 33 of FIG. 1.
FIG. 4 is a partial top view of the sterilizer operating mechanism according to the invention.
FIG. 5 is a cross sectional view taken on line 5-5 of FIG. 1.
FIG. 6 is a rear view of the sterilizer according to the invention.
DETAILED DESCRIPTION OF THE DRAWINGS Now with more particular reference to the drawings, the sterilizer chamber 10 is welded to the rear plate 14 of the enclosure shown. The sterilizer is made up of an outer shell 13 and an inner shell 12 which enclose the chamber space shown and may be of a conventional design in steam sterilizers. The outer shell 13 and inner shell 12 are welded to the rear plate 14 which forms the rear wall of the door enclosure. The door slides to open and to closed positions below top wall 54 between the front wall 17 and the rear wall 14 and these two walls are connected at the sides, top and bottom to form the sealed enclosure for the door 15.
A lifting mechanism made up of gear reducer 22 and motor 34 is supported on a bracket 35 at the side of the sterilizer and the gear reducer drives the shaft 36 to which sprockets are attached and over which a chain 37 is suspended, the chain being attached to the door 15. A counterweight 16 is connected to the chain 26. The counterweight balances the weight of the door.
The door has laterally extending pins 37 and 38 which slide between the cleats 39 and 40 and guide the door to open and closed position.
An entrance chamber 18 is fixed to the door around the opening 41 in the front wall 17. A door frame 42 is fixed to the front wall 17 and this door has an opening 42 which is aligned with the opening 33 in the rear wall 14.
A seal 18 is fixed to the door frame around the opening 42 and this seal may be made of a resilient gasket, suitable to withstand the required temperatures, against which the door rests when in closed position.
The plungers 19 are supported in plunger supports 20 which have suitable seals. The sprockets 28 are supported on the plungers.
The front wall 17 and rear wall 14 are reinforced by stiffening members 25. The sprockets 28 are connected by a continuous chain 26 which passes around the outside of the sprockets 28 and engages the sprocket 29 which is connected to the shaft of motor 23.
ln operation, the motor 23 is driven in one direction. It will move the limit shaft 31 to a position to open the limit switch 30. This will move the plungers l9 outward to disengage the door 15 so that motor 22 can drive its sprocket to lift the door 15 to open position. is, clamping the door 15 against the seal 18.
Limit switch is actuated by members 29 and 30 and the limit switches 50 and 51 may be connected in electrical circuit with motor 22 and motor 23 to synchronize the motor 23 with the motor 22.
The foregoing specification sets forth the invention in its preferred practical forms but the structure shown is capable of modification within a range of equivalents without departing from the invention which is to be understood is broadly novel as is commensurate with the appended claims.
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
l. A door assembly for a chamber comprising a sealed enclosure,
a door supported in said enclosure,
said enclosure being made of a front wall, a rear wall,
a top wall and a bottom wall spaced from each other and connected together to form said sealed enclosure,
an opening in said front wall and an opening in said rear wall aligned with said opening in said front wall,
said door being disposed between said openings,
means to move said door from its position between said openings to a position out of the space between said openings,
a seal around said opening in said front wall on the side thereof adjacent said rear wall,
and means to force said door into engagement with said seal when said door is in position between said openings,
said rear wall being adapted to be connected to a chamber connected around said opening therein whereby the space in said chamber communicates with the space in said enclosure when said door is in closed position,
said means to force said door against said seal comprises a plurality of plungers supported on said rear wall,
and means for urging said plungers into engagement with said door,
said means to actuate said plungers comprises actuating means attached to each said plunger,
a motor on said enclosure,
and connecting means connecting said motor to each of said plungers whereby said plungers are actuated,
said actuating means comprises a first sprocket and a plurality of second sprockets, one said sprocket being attached to each said plunger,
and means to drive said motor whereby said first plunger moves said second sprockets to actuate said plungers toward and away from said door when said door is in closed position,
said spaced sprockets are connected to said plungers by means of a nut and screw arrangement whereby said plungers are moved toward said door when said sprockets are rotated in a first direction and said sprockets are moved away from said door when said sprockets are rotated in an opposite direction.
2. The door assembly recited in claim 1 wherein said means to move said door away from said space between said openings comprises a motor means above said door,
a sprocket connected to said motor,
and a chain over said sprocket,
said chain being attached to said door.
3. The door assembly recited in claim 2 wherein said means to move said door comprises a flexible member attached to said door,
and means on said door engaging said flexible member,
and a counterweight attached to said flexible member on the end thereof remote from said door.
4. A door for a chamber comprising a sealed enclosure,
a door supported in said enclosure,
said enclosure being made of a front wall, a rear wall,
a top wall and a bottom wall spaced from each other and connected together to form said sealed enclosure,
an opening in said front wall and an opening in said rear wall aligned with said opening in said front wall,
said door being disposed between said openings,
means to move said door from its position between said openings to a position out of the space between said openings,
a seal around said opening in said front wall on the side thereof adjacent said rear wall,
and means to force said door into engagement with said seal when said door is in position between said openings,
said rear wall being adapted to be connected to a chamber connected around said opening therein whereby the space in said chamber communicates with the space in said enclosure when said door is in closed position,
said means to force said door against said seal comprises a plurality of plungers supported on said rear wall,
and means for urging said plungers into engagement with said door,
said means to actuate said plungers comprises actuating means attached to each said plunger,
a motor on said enclosure,
and connecting means connecting said motor to each of said plungers whereby said plungers are actuated, said actuating means comprises a first sprocket and a 5 plurality of second sprockets, one said sprocket being attached to each said plunger, and means to drive said motor whereby said first plunger moves said secogd sproc ets to actuate said plungers toward an away rom said door when said door is in closed position,
detent means are attached to said plungers,
and electrical limit switch means are supported on said door,
means for moving said detent means with said plungers whereby said limit switches are opened when said plungers are moved to position to clamp said door and to position to unclamp said door. 5. The door assembly recited in claim 4 wherein said detent means is attached to said plunger,
and electrical limit switch means is supported on said door, means for moving said detent means with said plungers whereby said detent means disconnect said motor from said power supply when said door reaches said open position. 6. in combination, a sterilizer chamber and a door assembly for said chamber comprising a sealed enclosure extending above said chamber, a door supported in said enclosure, said enclosure being made of a front wall, a rear wall, a top wall and a bottom wall spaced from each other and connected together to form said sealed enclosure, an opening in said front wall and an opening in said rear wall aligned with said opening in said front wall, said door being disposed between said openings, means to move said door from its position between said openings to a position out of the space between said openings, a seal around said opening in said front wall on the side thereof adjacent said rear wall, and means to force said door into engagement with said seal when said door is in position between said openings, said rear wall being connected to said chamber around said opening therein whereby the space in said chamber communicates with the space in said enclosure when said door is in closed position. 50 7. The combination recited in claim 6 wherein said sterilizer chamber has a steam jacket around the outside thereof,
said steam jacket and said chamber being welded to said rear wall around said opening, and said enclosure extending upwardly above said sterilizer chamber.
i i i

Claims (7)

1. A door assembly for a chamber comprising a sealed enclosure, a door supported in said enclosure, said enclosure being made of a front wall, a rear wall, a top wall and a bottom wall spaced from each other and connected together to form said sealed enclosure, an opening in said front wall and an opening in said rear wall aligned with said opening in said front wall, said door being disposed between said openings, means to move said door from its position between said openings to a position out of the space between said openings, a seal around said opening in said front wall on the side thereof adjacent said rear wall, and means to force said door into engagement with said seal when said door is in position between said openings, said rear wall being adapted to be connected to a chamber connected around said opening therein whereby the space in said chamber communicates with the space in said enclosure when said door is in closed position, said means to force said door against said seal comprises a plurality of plungers supported on said rear wall, and means for urging said plungers into engagement with said door, said means to actuate said plungers comprises actuating means attached to each said plunger, a motor on said enclosure, and connecting means connecting said motor to each of said plungers whereby said plungers are actuated, said actuating means comprises a first sprocket and a plurality of second sprockets, one said sprocket being attached to each said plunger, and means to drive said motor whereby said first plunger moves said second sprockets to actuate said plungers toward and away from said door when said door is in closed position, said spaced sprockets are connected to said plungers by means of a nut and screw arrangement whereby said plungers are moved toward said door when said sprockets are rotated in a first direction and said sprockets are moved away from said door when said sprockets are rotated in an opposite direction.
2. The door assembly recited in claim 1 wherein said means to move said door away from said space between said openings comprises a motor means above said door, a sprocket connected to said motor, and a chain over said sprocket, said chain being attached to said door.
3. The door assembly recited in claim 2 wherein said means to move said door comprises a flexible member attached to said door, and means on said door engaging said flexible member, and a counterweight attached tO said flexible member on the end thereof remote from said door.
4. A door for a chamber comprising a sealed enclosure, a door supported in said enclosure, said enclosure being made of a front wall, a rear wall, a top wall and a bottom wall spaced from each other and connected together to form said sealed enclosure, an opening in said front wall and an opening in said rear wall aligned with said opening in said front wall, said door being disposed between said openings, means to move said door from its position between said openings to a position out of the space between said openings, a seal around said opening in said front wall on the side thereof adjacent said rear wall, and means to force said door into engagement with said seal when said door is in position between said openings, said rear wall being adapted to be connected to a chamber connected around said opening therein whereby the space in said chamber communicates with the space in said enclosure when said door is in closed position, said means to force said door against said seal comprises a plurality of plungers supported on said rear wall, and means for urging said plungers into engagement with said door, said means to actuate said plungers comprises actuating means attached to each said plunger, a motor on said enclosure, and connecting means connecting said motor to each of said plungers whereby said plungers are actuated, said actuating means comprises a first sprocket and a plurality of second sprockets, one said sprocket being attached to each said plunger, and means to drive said motor whereby said first plunger moves said second sprockets to actuate said plungers toward and away from said door when said door is in closed position, detent means are attached to said plungers, and electrical limit switch means are supported on said door, means for moving said detent means with said plungers whereby said limit switches are opened when said plungers are moved to position to clamp said door and to position to unclamp said door.
5. The door assembly recited in claim 4 wherein said detent means is attached to said plunger, and electrical limit switch means is supported on said door, means for moving said detent means with said plungers whereby said detent means disconnect said motor from said power supply when said door reaches said open position.
6. In combination, a sterilizer chamber and a door assembly for said chamber comprising a sealed enclosure extending above said chamber, a door supported in said enclosure, said enclosure being made of a front wall, a rear wall, a top wall and a bottom wall spaced from each other and connected together to form said sealed enclosure, an opening in said front wall and an opening in said rear wall aligned with said opening in said front wall, said door being disposed between said openings, means to move said door from its position between said openings to a position out of the space between said openings, a seal around said opening in said front wall on the side thereof adjacent said rear wall, and means to force said door into engagement with said seal when said door is in position between said openings, said rear wall being connected to said chamber around said opening therein whereby the space in said chamber communicates with the space in said enclosure when said door is in closed position.
7. The combination recited in claim 6 wherein said sterilizer chamber has a steam jacket around the outside thereof, said steam jacket and said chamber being welded to said rear wall around said opening, and said enclosure extending upwardly above said sterilizer chamber.
US64776A 1970-08-18 1970-08-18 Door assembly and chamber combination Expired - Lifetime US3694960A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075787A (en) * 1975-07-07 1978-02-28 American Sterilizer Company Inflatable pouch to seal
US4432164A (en) * 1981-06-25 1984-02-21 S.A.R.L. Commodore International Device for controlling the opening and closing of fluidtight doors
US20030136343A1 (en) * 2002-01-18 2003-07-24 Shen Tsung-Lin Apparatus for sealing a vacuum chamber
US20150203290A1 (en) * 2013-01-22 2015-07-23 Spokane Industries Sliding - Locking Below Liquid Manway Door

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2313095A (en) * 1940-05-31 1943-03-09 Guardite Corp Door control mechanism
CH431007A (en) * 1964-02-10 1967-02-28 Commissariat Energie Atomique Watertight door
US3436861A (en) * 1967-06-13 1969-04-08 Air Reduction Door construction

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2313095A (en) * 1940-05-31 1943-03-09 Guardite Corp Door control mechanism
CH431007A (en) * 1964-02-10 1967-02-28 Commissariat Energie Atomique Watertight door
US3436861A (en) * 1967-06-13 1969-04-08 Air Reduction Door construction

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075787A (en) * 1975-07-07 1978-02-28 American Sterilizer Company Inflatable pouch to seal
US4432164A (en) * 1981-06-25 1984-02-21 S.A.R.L. Commodore International Device for controlling the opening and closing of fluidtight doors
US20030136343A1 (en) * 2002-01-18 2003-07-24 Shen Tsung-Lin Apparatus for sealing a vacuum chamber
US6799394B2 (en) * 2002-01-18 2004-10-05 Shen Tsung-Lin Apparatus for sealing a vacuum chamber
US20150203290A1 (en) * 2013-01-22 2015-07-23 Spokane Industries Sliding - Locking Below Liquid Manway Door
US9637307B2 (en) * 2013-01-22 2017-05-02 Spokane Industries Sliding-locking below liquid manway door
US10239688B2 (en) 2013-01-22 2019-03-26 Spokane Industries Sliding—locking below liquid manway door

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AS Assignment

Owner name: MORGAN GUARANTY TRUST COMPANY,NEW YORK

Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN STERILIZER COMPANY, A PA CORP.;REEL/FRAME:004765/0752

Effective date: 19870827

Owner name: MORGAN GUARANTY TRUST COMPANY, 23 WALL STREET, NEW

Free format text: SECURITY INTEREST;ASSIGNOR:AMERICAN STERILIZER COMPANY, A PA CORP.;REEL/FRAME:004765/0752

Effective date: 19870827

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Owner name: AMERICAN STERILIZER COMPANY, ONE MELLON BANK CENTE

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:MORGAN GUARANTY TRUST COMPANY OF NEW YORK;REEL/FRAME:005581/0543

Effective date: 19910130