US3905453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator mechanism and method
Assignee: Revvity Health Sciences Inc
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Filing: 1973-01-12
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Granted: 1975-09-16
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Expires: 1993-01-12
Abstract
Abstract An elevator mechanism and method for raising and lowering radioactive samples through a vertical well which has a practical limit on its height. The elevator mechanism adds little or nothing to the height of the well by using an elongated flexible metal member such as tape secured to the bottom of the elevator platform and extending downwardly through the well, where the tape is bent laterally for connection to a drive means. In the particular embodiment illustrated, the tape is bent laterally below the bottom shielding for the counting chamber in a scintillation detector, and then upwardly along or through one side of the shielding to a reel at the top of the shielding. The tape is wound onto the reel, and the reel is driven by a reversible motor which winds and unwinds the tape on the reel to raise and lower the elevator platform.
Inventors
- 👤 Edmund Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:11
CPC Classifications
G; G01; G01T; G01T7/00; G01T7/08; B; B66; B66F; B66F13/00; B66F13/005; Y; Y10; Y10S; Y10S52/00; Y10S52/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
An elevator mechanism for raising and lowering items in a vertical well, said elevator mechanism comprising the combination of a platform mounted for vertical movement through said well, an elongated flexible member having only one end secured to only the bottom of said platform and extending downwardly from said platform through said well, laterally away from said well below the bottom thereof, and then upwardly with said flexible member terminating with its other end at an elevation above said well, said flexible member being unsupported along the length of travel of said platform and sufficiently rigid to support said platform throughout said length of travel, said flexible member also being sufficiently flexible to be bent about the bottom of said well, and reversible drive means connected to said other flexible member end for advancing and retracting said member to raise and lower said platform in said well.
Claim 2
Dependent Claim
147 words
An elevator mechanism for raising and lowering items in a vertical well, said elevator mechanism comprising the combination of a platform mounted for vertical movement through said well, an elongated flexible member having only one end secured to only the bottom of said platform and extending downwardly from said platform through said well, laterally away from said well below the bottom thereof, and then upwardly with said flexible member terminating with its other end at an elevation above said well, said flexible member being unsupported along the length of travel of said platform and sufficiently rigid to support said platform throughout said length of travel, said flexible member also being sufficiently flexible to be bent about the bottom of said well, and reversible drive means connected to said other flexible member end for advancing and retracting said member to raise and lower said platform in said well.
Claim 3
Dependent Claim
18 words
An elevator mechanism as set forth in claim 1 wherein said elongated flexible member is a metal tape.
Claim 4
Dependent Claim
43 words
The elevator mechanism as set forth in claim 1 in which said drive means includes a reel to which said other flexible member end is coupled and upon which said flexible member may be wound and unwound by actuation of said drive means.
Claim 5
Independent Claim
140 words
A method of raising and lowering items in a vertical well having a platform mounted for vertical movement within the well, said method comprising the steps of connecting only one end of an elongated flexible member to only the bottom of said platform and extending said flexible member downwardly from said platform through said well, laterally away from said well below the bottom thereof, and then upwardly so that the other end of said flexible member is at an elevation above said well, said flexible member being unsupported along the length of travel of said platform and sufficiently rigid to support said platform throughout said length of travel, coupling said other flexible member end to a reversible drive mechanism, and alternately actuatIng said drive mechanism for advancing and retracting said member to raise and lower said platform within said well.
Claim 6
Independent Claim
140 words
A method of raising and lowering items in a vertical well having a platform mounted for vertical movement within the well, said method comprising the steps of connecting only one end of an elongated flexible member to only the bottom of said platform and extending said flexible member downwardly from said platform through said well, laterally away from said well below the bottom thereof, and then upwardly so that the other end of said flexible member is at an elevation above said well, said flexible member being unsupported along the length of travel of said platform and sufficiently rigid to support said platform throughout said length of travel, coupling said other flexible member end to a reversible drive mechanism, and alternately actuatIng said drive mechanism for advancing and retracting said member to raise and lower said platform within said well.
Claim 7
Dependent Claim
26 words
A method of raising and lowering items in a vertical well as set forth in claim 4 wherein said elongated flexible member is a metal tape.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |