Patent US3320533A successfully refreshed from Google Patents.
US4115697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube cooling arrangement
Assignee: QED Intellectual Property Ltd
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Filing: 1977-05-17
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Granted: 1978-09-19
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Expires: 1997-05-17
Abstract
Abstract In a computerized tomographic apparatus for radiographic apparatus it has been proposed to orbit a source of X-radiation through several revolutions of the body of the patient. It is desirable to provide cooling to remove generated heat from the X-ray source, this being usually achieved by a cooling fluid such as oil. It is now proposed to provide a closed circuit cooling arrangement, for the source, comprising a circulatory oil path mounted to share in the orbit of the source without external fluid connections. To assist in cooling, the circuit is provided with a radiator and arranged such that, during pauses in the orbit, the radiator is brought to rest in a forced draught from a non-orbiting cooling fan.
Inventors
- 👤 Godfrey Newbold Hounsfield
- 👤 Anthony Michael Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:04
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/02; A61B6/03; A61B6/032; A61B6/035; A61B6/44; A61B6/4488; H; H05; H05G; H05G1/00; H05G1/02; H05G1/025
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A radiographic apparatus, for examining a region of the body of a patient, including: a support movable around the body; an X-ray tube mounted on said support to direct radiation through the body; a coolant circuit, connected to said tube and mounted on said support, containing coolant, which can circulate therein, and including a radiative surface at which heat can be removed from the coolant; means for moving the support, and with it the tube and coolant circuit, around the body from a defined rest position, to direct the radiation therethrough along a plurality of different paths thereafter returning to the rest position; and cooling means disposed to direct further coolant at the radiative surface when the support is in said rest position to remove heat from said first mentioned coolant.
Claim 2
Dependent Claim
131 words
A radiographic apparatus, for examining a region of the body of a patient, including: a support movable around the body; an X-ray tube mounted on said support to direct radiation through the body; a coolant circuit, connected to said tube and mounted on said support, containing coolant, which can circulate therein, and including a radiative surface at which heat can be removed from the coolant; means for moving the support, and with it the tube and coolant circuit, around the body from a defined rest position, to direct the radiation therethrough along a plurality of different paths thereafter returning to the rest position; and cooling means disposed to direct further coolant at the radiative surface when the support is in said rest position to remove heat from said first mentioned coolant.
Claim 3
Dependent Claim
33 words
A radiographic apparatus according to claim 1 in which the means for moving comprises means for moving the support through a plurality of revolutions about the body before returning to the rest position.
Claim 4
Dependent Claim
16 words
A radiographic apparatus according to claim 1 in which the coolant circuit includes a coolant reservoir.
Claim 5
Dependent Claim
31 words
A radiographic apparatus according to claim 1 in which the first mentioned coolant is intermittently liquid to utilize the latent heat of change of state to increase the thermal capacity thereof.
Claim 6
Dependent Claim
22 words
A radiographic apparatus according to claim 1 in which said cooling means comprises means directing an air blast at said radiative surface.
Claim 7
Dependent Claim
15 words
A radiographic apparatus according to claim 5 in which the cooling means is a fan.
Claim 8
Dependent Claim
28 words
A radiographic apparatus according to claim 5 wherein the cooling means includes means for directing the air blast tangentially to the locus of motion of the radiative surface.
Claim 9
Dependent Claim
21 words
A radiographic apparatus according to claim 1 in which the radiative surface comprises a coil or loop in the coolant circuit.
Claim 10
Dependent Claim
24 words
A radiographic apparatus according to claim 1 wherein the coolant circuit mounted on said support movable around the body comprises a closed coolant circuit.
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |