US4459485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma tomography apparatus comprising a parallelogram suspension system
Assignee: ADAC Laboratories Inc
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Filing: 1982-05-20
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Granted: 1984-07-10
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Expires: 2002-05-20
Abstract
Abstract In a radiation apparatus an element, which is carried by a balanced suspension system, is to be positioned relative to an object. The element and a counterweight are carried by a parallelogram suspension system in order to increase the adjusting accuracy and the freedom of movement. In order to obtain a smooth, static movement, even during rotation of the entire suspension system, the positioning function and the supporting function of one of the pivotal supports are separated, each function being performed by a separate pivot.
Inventors
- 👤 Francis J. Span
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:37
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/001; B23Q11/0017; A; A61; A61B; A61B6/00; A61B6/44; A61B6/4429; A61B6/447; B25; B25J; B25J19/00; B25J19/0008; B25J19/002; B66; B66C; B66C23/00; B66C23/005; G; G01; G01T; G01T1/00; G01T1/16; G01T1/161; G01T1/164; G01T1/1641; G01T1/1648
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
164 words
A radiological apparatus comprising: a supporting structure; a supporting arm pivotally amounted on the supporting structure at a first pivot point, said arm having first and second ends extending on opposite sides of the first pivot point; a radiological element pivotally mounted on the first end of the supporting arm at a second pivot point; a control arm having first and second ends, the first end pivotally connected to the radiological element at a third pivot point and the second end pivotally connected to the supporting structure at a fourth pivot point, straight lines connecting the first, second, third, and fourth pivot points tracing out a parallelogram; and a counterweight pivotally connected to the second end of the supporting arm at a fifth pivot point and pivotally connected to the supporting structure at a sixth pivot point, said counterweight having two portions pivotally connected to each other at a seventh pivot point, the first, fifth, sixth and seventh pivot points tracing out a parallelogram.
Claim 2
Dependent Claim
164 words
A radiological apparatus comprising: a supporting structure; a supporting arm pivotally amounted on the supporting structure at a first pivot point, said arm having first and second ends extending on opposite sides of the first pivot point; a radiological element pivotally mounted on the first end of the supporting arm at a second pivot point; a control arm having first and second ends, the first end pivotally connected to the radiological element at a third pivot point and the second end pivotally connected to the supporting structure at a fourth pivot point, straight lines connecting the first, second, third, and fourth pivot points tracing out a parallelogram; and a counterweight pivotally connected to the second end of the supporting arm at a fifth pivot point and pivotally connected to the supporting structure at a sixth pivot point, said counterweight having two portions pivotally connected to each other at a seventh pivot point, the first, fifth, sixth and seventh pivot points tracing out a parallelogram.
Claim 3
Dependent Claim
27 words
An apparatus as claimed in claim 1, characterized in that the supporting structure is a supporting ring which is rotatable about an isocentric axis of an object.
Claim 4
Dependent Claim
26 words
An apparatus as claimed in claim 2, characterized in that the supporting ring comprises a disc which is supported by two guide wheels in a bearing.
Claim 5
Dependent Claim
27 words
An apparatus as claimed in claim 2, characterized in that the supporting ring is shaped as a cone and is journalled in a bearing via a shaft.
Claim 6
Dependent Claim
23 words
An apparatus as claimed in claim 4, characterized in that the fourth pivot point is located in the cone of the supporting ring.
Claim 7
Dependent Claim
35 words
An apparatus as claimed in claim 5, characterized in that: the supporting ring is provided with an angular scale; and the apparatus further comprises a stepping motor for rotating the supporting ring about the axis.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |