Patent US3660664A successfully refreshed from Google Patents.
US3660664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wedge for varying cross-sectional intensity of beam of penetrating radiation
Assignee: Individual
•
Filing: 1970-05-11
•
Granted: 1972-05-02
•
Expires: 1990-05-11
Abstract
Abstract For use with an X-ray source, a wedge for distributing the intensity of radiation over an object area comprises a wedgeshaped enclosure partially filled with a radiation-opaque liquid. The enclosure is adapted for mounting on an X-ray tube head so as to be tiltable therewith thereby to alter the effective angle of incline of the ''''liquid wedge'''' and consequently its filtering characteristic.
Inventors
- 👤 Robert P Pasmeg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:22
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/02; A61B6/03; A61B6/032; A61B6/40; A61B6/4035; A61B6/50; A61B6/504; G; G21; G21K; G21K1/00; G21K1/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
165 words
In combination: a head including a source of penetrating radiation for producing a penetrating beam, a pair of parallel tracks secured to said head and disposed on opposite sides of said beam, means pivotally mounting said head for movement in both directions about a horizontal axis transverse to said tracks from a normal position at which said tracks are disposed horizontally, and a filtering wedge for varying the cross-sectional intensity of said beam comprising an enclosure having a cover plate supported on said tracks across the penetrating beam produced by said source, and a wedge-shaped container secured to and depending from said cover plate and tapered in the direction of said tracks, said container being partially filled with a fluid opaque to said penetrating radiation which forms a wedge-shaped fluid body having a free horizontal surface and the angle of taper of which is adjustable in response to tilting of said head about said horizontal axis for selectively altering the filtering characteristics of said wedge.
Claim 2
Dependent Claim
165 words
In combination: a head including a source of penetrating radiation for producing a penetrating beam, a pair of parallel tracks secured to said head and disposed on opposite sides of said beam, means pivotally mounting said head for movement in both directions about a horizontal axis transverse to said tracks from a normal position at which said tracks are disposed horizontally, and a filtering wedge for varying the cross-sectional intensity of said beam comprising an enclosure having a cover plate supported on said tracks across the penetrating beam produced by said source, and a wedge-shaped container secured to and depending from said cover plate and tapered in the direction of said tracks, said container being partially filled with a fluid opaque to said penetrating radiation which forms a wedge-shaped fluid body having a free horizontal surface and the angle of taper of which is adjustable in response to tilting of said head about said horizontal axis for selectively altering the filtering characteristics of said wedge.
Claim 3
Dependent Claim
26 words
Apparatus in accordance with claim 1 wherein said enclosure is substantially transparent to said penetrating radiation and said fluid comprises an aqueous solution of sodium diatrizoate.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |