Patent US4552347A successfully refreshed from Google Patents.
US4552347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-Ray apparatus comprising a table-top which is displaceable in the longitudinal direction
Assignee: US Philips Corp
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Filing: 1983-11-28
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Granted: 1985-11-12
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Expires: 2003-11-28
Abstract
Abstract The invention relates to a patient table for an X-ray apparatus. The table has a table top which is displaceable in the longitudinal direction thereof. The table top is coupled to an endless chain which is guided by sprockets. One sprocket is driven by a motor. The coupling between the table top and the chain is realized by means of comb-like coupling elements which engage the chain. The coupling elements are arranged so as to be offset with respect to one another in the longitudinal direction of the table top.
Inventors
- 👤 Manfred Wallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:38
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/04; A61G; A61G13/00; A61G2203/00; A61G2203/70; A61G2203/72; A61G2210/00; A61G2210/50; Y; Y10; Y10S; Y10S5/00; Y10S5/943
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
207 words
A patient table for an X-ray apparatus, said table comprising: a carriage; a table top slidably arranged on the carriage to be displaceable in a longitudinal direction; at least two rotatable sprockets arranged on the carriage and spaced from each other in the longitudinal direction, each sprocket having teeth; a motor for rotating one of the sprockets; an endless chain loop arranged around the sprockets, said chain having links engaged by the teeth of the sprockets; and a plurality of coupling elements attached to the table top, said coupling elements being spaced from each other in the longitudinal direction and being arranged to engage the chain links; characterized in that: the chain has a pitch equal to the length of the chain divided by the number of links in the chain; adjacent teeth of the sprockets are separated circumferentially by a distance equal to twice the pitch of the chain so that the teeth of the sprockets engage only every other chain link; adjacent coupling elements are separated by a distance equal to twice the pitch of the chain so that the coupling elements engage only every other chain link; and the coupling elements engage only links which are not engaged by the teeth of the sprockets.
Claim 2
Dependent Claim
207 words
A patient table for an X-ray apparatus, said table comprising: a carriage; a table top slidably arranged on the carriage to be displaceable in a longitudinal direction; at least two rotatable sprockets arranged on the carriage and spaced from each other in the longitudinal direction, each sprocket having teeth; a motor for rotating one of the sprockets; an endless chain loop arranged around the sprockets, said chain having links engaged by the teeth of the sprockets; and a plurality of coupling elements attached to the table top, said coupling elements being spaced from each other in the longitudinal direction and being arranged to engage the chain links; characterized in that: the chain has a pitch equal to the length of the chain divided by the number of links in the chain; adjacent teeth of the sprockets are separated circumferentially by a distance equal to twice the pitch of the chain so that the teeth of the sprockets engage only every other chain link; adjacent coupling elements are separated by a distance equal to twice the pitch of the chain so that the coupling elements engage only every other chain link; and the coupling elements engage only links which are not engaged by the teeth of the sprockets.
Claim 3
Dependent Claim
28 words
A patient table as claimed in claim 1, characterized in that the coupling elements are the teeth of a rack which is rigidly connected to the table top.
Claim 4
Dependent Claim
37 words
A patient table as claimed in claim 2, characterized in that the table further comprises a guide rail arranged on the carriage to limit deflection of the chain where the chain is engaged by the coupling elements.
Claim 5
Dependent Claim
41 words
A patient table as claimed in claim 3, characterized in that the guide rail has two ducts for guiding the chain, and the guide rail has a slit communicating with one duct, the coupling elements engaging the chain through the slit.
Claim 6
Dependent Claim
37 words
A patient table as claimed in claim 4, characterized in that the rack comprises a rail to which the teeth of the rack are affixed, the rail being slidably arranged on the slit in the guide rail.
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) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |