US3625639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interchangeable conveying apparatus for pressurized vessels such as reactors
Assignee: BBC Brown Boveri AG Germany
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Filing: 1968-06-12
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Granted: 1971-12-07
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Expires: 1988-06-12
Abstract
Abstract An electric motor driving the impeller of a blower unit located at one end of the motor shaft is insertable in a guide sleeve extending through a wall of a nuclear reactor vessel. As the motor unit is pushed into the guide sleeve, the leading end of the blower unit engages and pushes back a spring loaded cover plate which had sealed the wall opening to prevent loss of pressure from the reactor vessel. When the combined motor and blower unit is withdrawn from the guide sleeve in the wall, the spring loaded cover plate automatically moves back into its sealing position.
Inventors
- 👤 Jean Eggmann
- 👤 Ernst Sidler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:16
CPC Classifications
G; G21; G21C; G21C15/00; G21C15/24; F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/14; F04D29/143; F04D29/60; F04D29/601; F04D29/602; F04D29/604; F04D29/605; F04D29/606; F04D29/608; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
326 words
Interchangeable motor driven blower apparatus for use in circulating a fluid within a pressure vessel such as a nuclear reactor comprising a cylindrical housing containing a motor, a blower including a cylindrical casing having axially spaced radial inlet and outlets and which is structurally united with said motor housing adjacent one end wall thereof, an impeller within said blower casing and secured to the motor shaft, said motor housing and blower casing being slidably mounted in a cylindrical duct extending through a wall of said vessel, said blower being located within said pressure vessel when fully inserted in said duct such that said blower outlet is aligned with an inlet to a chamber located within said pressure vessel but separated by a partition wall from the remaining interior portion of said vessel and said blower inlet communicates with said remaining interior portion, an axially displaceable cylindrical closure rung surrounding said blower casing and which is located intermediate said blower inlet and outlet in the fully inserted position of said blower, an axially displaceable closure cover mounted within said pressure vessel coaxially with and opposite one end of said closure ring, means biasing said closure cover in the direction of said closure ring such that when said blower is withdrawn from the interior of said pressure vessel said closure cover automatically shifts axially towards and sealingly engages said closure ring at one end thereof thereby to shift said closure ring to a position closing off said inlet to said chamber and effecting a sealing engagement between the other end of said closure ring and the inner end of said duct, said blower being engageable with said closure ring and with said closure cover upon its reinsertion within said vessel thereby to shift said closure ring and closure cover in the opposite direction to their original positions, and a removable cover for the outer end of said duct to enable said blower and motor housing to be removed.
Claim 2
Dependent Claim
326 words
Interchangeable motor driven blower apparatus for use in circulating a fluid within a pressure vessel such as a nuclear reactor comprising a cylindrical housing containing a motor, a blower including a cylindrical casing having axially spaced radial inlet and outlets and which is structurally united with said motor housing adjacent one end wall thereof, an impeller within said blower casing and secured to the motor shaft, said motor housing and blower casing being slidably mounted in a cylindrical duct extending through a wall of said vessel, said blower being located within said pressure vessel when fully inserted in said duct such that said blower outlet is aligned with an inlet to a chamber located within said pressure vessel but separated by a partition wall from the remaining interior portion of said vessel and said blower inlet communicates with said remaining interior portion, an axially displaceable cylindrical closure rung surrounding said blower casing and which is located intermediate said blower inlet and outlet in the fully inserted position of said blower, an axially displaceable closure cover mounted within said pressure vessel coaxially with and opposite one end of said closure ring, means biasing said closure cover in the direction of said closure ring such that when said blower is withdrawn from the interior of said pressure vessel said closure cover automatically shifts axially towards and sealingly engages said closure ring at one end thereof thereby to shift said closure ring to a position closing off said inlet to said chamber and effecting a sealing engagement between the other end of said closure ring and the inner end of said duct, said blower being engageable with said closure ring and with said closure cover upon its reinsertion within said vessel thereby to shift said closure ring and closure cover in the opposite direction to their original positions, and a removable cover for the outer end of said duct to enable said blower and motor housing to be removed.
Claim 3
Dependent Claim
48 words
Apparatus as defined in claim 1 wherein said means for biasing said closure cover in the direction of said closure ring is constituted by spring means, one end of said spring means being fixed within said pressure vessel and the other end exerting pressure against said closure cover.
Claim 4
Dependent Claim
59 words
Apparatus as defined in claim 1 and which includes means for introducing fluid under pressure between the end of said motor housing and the closed outer end of said duct for effecting movement of said motor housing and blower to its fully inserted position within said duct against the counter action of said biasing means for said closure cover.
Claim 5
Dependent Claim
32 words
Apparatus as defined in claim 3 and which further includes means for securing said motor housing and blower in the fully inserted position against the counter biasing action of said closure cover.
Claim 6
Dependent Claim
38 words
Apparatus as defined in claim 1 wherein the sealing engagement of the opposite ends of said closure ring with said closure cover and inner end of said duct respectively is effected by means of radially spaced sealing rings.
Claim 7
Dependent Claim
42 words
Apparatus as defined in claim 5 and which further includes means located between said radially spaced sealing rings for drawing off any leakage fluid therebetween at the interfaces of said closure ring and closure cover and inner end Of said duct respectively.
Claim 8
Dependent Claim
40 words
Apparatus as defined in claim 5 and which further includes means located between said radially spaced sealing rings for introducing a barrier medium to the interfaces of said closure ring and closure cover and inner end of said duct respectively.
Claim 9
Dependent Claim
40 words
Apparatus as defined in claim 1 and which further includes means for reducing the sliding friction between he surface of the motor housing and inner surface of said duct to facilitate removal and replacement of said motor housing and blower.
Claim 10
Dependent Claim
26 words
Apparatus as defined in claim 8 wherein said means for reducing the sliding friction between said motor housing and duct is constituted by pressurized gas bearings.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |