US3569712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration head for x-ray machine which is removably and rotatably supported on the x-ray collimator
Assignee: Individual
•
Filing: 1968-05-31
•
Granted: 1971-03-09
•
Expires: 1988-05-31
Abstract
Abstract A filtration head adapted for attachment to a tubular collimator on an X-ray machine or cephalometer in the form of a rayabsorbent filter of varying thickness adjustable to produce an image clearly defining the hard and soft tissues of the head or body along and adjacent to profiles of the head or portion of the body under examination to different distances from said profiles.
Inventors
- 👤 Edward A Avakoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:31
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/50; A61B6/501; G; G03; G03B; G03B42/00; G03B42/02; G03B42/04; G03B42/042; G21; G21K; G21K1/00; G21K1/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
A filtration head for positioning on the outer end of the cylindrical extension tube on the collimator of an X-ray machine comprising: a. a body formed with an opening having a central axis and through which opening the rays of said machine are adapted to be projected, b. a metal plate on said body move movable from one side of said opening, substantially uncovering the latter, to different positions extending partially across said opening from said one side, leaving an unobstructed remainder in said opening, c. said body being formed with a guideway extending normal to said axis having parallel sides extending from two opposite sides of said opening, d. said plate comprising a generally rectangular slide member supported in said guideway by said opposite parallel sides for reciprocable movement on said body toward and away from said axis, and e. means on said body in frictional yieldable engagement with said slide for frictionally holding said slide in each of said different positions, f. said opening including a portion having cylindrical sides extending axially of said opening from one side of said plate for slidably and removably receiving said outer end of the cylindrical extension tube of a collimator for rotatably supporting said body on said outer end for rotary movement to different adjusted positions.
Claim 2
Dependent Claim
215 words
A filtration head for positioning on the outer end of the cylindrical extension tube on the collimator of an X-ray machine comprising: a. a body formed with an opening having a central axis and through which opening the rays of said machine are adapted to be projected, b. a metal plate on said body move movable from one side of said opening, substantially uncovering the latter, to different positions extending partially across said opening from said one side, leaving an unobstructed remainder in said opening, c. said body being formed with a guideway extending normal to said axis having parallel sides extending from two opposite sides of said opening, d. said plate comprising a generally rectangular slide member supported in said guideway by said opposite parallel sides for reciprocable movement on said body toward and away from said axis, and e. means on said body in frictional yieldable engagement with said slide for frictionally holding said slide in each of said different positions, f. said opening including a portion having cylindrical sides extending axially of said opening from one side of said plate for slidably and removably receiving said outer end of the cylindrical extension tube of a collimator for rotatably supporting said body on said outer end for rotary movement to different adjusted positions.
Claim 3
Dependent Claim
48 words
In a filtration head as defined in claim 1 stop means on said body for limiting movement of said body on said cylindrical tubular extension toward said extension when said extension is within said portion of said opening to space said plate a uniform distance from said extension.
Claim 4
Dependent Claim
154 words
A filtration head as defined in claim 2: a. means on said body in a position for yieldably engaging said cylindrical tubular extension when said extension is within said portion of said opening for yieldably holding said body stationary on said portion in any of said adjusted positions, b. said plate being of progressively increasing thickness from said unobstructed remainder of said opening in a direction toward said one side of said opening, whereby the degree of absorption of rays by said plate, when said body is on said tube and said rays are projected through said tube, will be progressively greater as the thickness of the portion of said plate extending across said opening increases so that adjoining hard and soft tissues onto which said rays may be projected will, when said body is in any one of its adjusted positions, be exposed for substantially optimum images of both, by a single exposure.
Claim 5
Dependent Claim
93 words
The filtration head as defined in claim 1, in combination with: a. a collimator including said cylindrical extension tube having an inner end adapted to be secured on an X-ray machine with said outer end opposite to said inner end, b. said portion of said opening being in slidable engagement with the radially outwardly facing cylindrical surface of said outer end and said body for rotatably supporting said body on said outer end, c. means on said body in releasable engagement with said tubular extension for releasably holding said body on said extension.
Claim 6
Dependent Claim
60 words
In the combination as defined in claim 4; said last-mentioned means including a radially inwardly spring-urged element in said body yieldably movable into said portion of said opening and an annular radially outwardly opening raceway formed in said radially outwardly facing surface of the cylindrical outer end of said tube in which said radially inwardly spring-urged element is yieldably urged.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |