Patent US4050551A successfully refreshed from Google Patents.
US4050551A
Expired / Lapsed
US
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Device for braking a counterweight in an x-ray examining apparatus
Assignee: US Philips Corp
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Filing: 1975-08-13
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Granted: 1977-09-27
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Expires: 1995-08-13
Abstract
Abstract In X-ray examining apparatus in which a compression counterweight is uncoupled in the vertical position, a problem exists in that, when the examining apparatus is turned over, the compression counterweight is coupled to the X-ray image section with a jolt. So as to avoid this jolt, pneumatic damping devices are known which, however, are very voluminous. According to the invention, a simple and efficient device for the damped coupling comprises a control circuit which brakes the counterweight when it exceeds a given speed.
Inventors
- 👤 Walter Schmedemann
- 👤 Wolfgang Hecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:37
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/44; A61B6/4429; A61B6/447; A61B6/10; A61B6/102; A61B6/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
X-ray apparatus comprising: an image section; a counterweight for compensating for the weight of said image section, said counterweight being uncouplable from said image section when said image section is in an orientation not requiring weight compensation; a speed detector adapted to generate a signal proportional to the difference in speed between said counterweight and said image section, said counterweight and image section having the same speed when coupled for weight compensation; a brake for braking the speed of said counterweight; and a control circuit responsive to said signal for actuating said brake when the amplitude of said signal exceeds a predetermined value.
Claim 2
Dependent Claim
103 words
X-ray apparatus comprising: an image section; a counterweight for compensating for the weight of said image section, said counterweight being uncouplable from said image section when said image section is in an orientation not requiring weight compensation; a speed detector adapted to generate a signal proportional to the difference in speed between said counterweight and said image section, said counterweight and image section having the same speed when coupled for weight compensation; a brake for braking the speed of said counterweight; and a control circuit responsive to said signal for actuating said brake when the amplitude of said signal exceeds a predetermined value.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |