Patent US3166138A successfully refreshed from Google Patents.
US3166138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stair climbing conveyance
Assignee: Individual
•
Filing: 1961-10-26
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Granted: 1965-01-19
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Expires: 1981-10-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward D Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:29
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/06; A61G5/061; A61G5/066; B; B62; B62D; B62D55/00; B62D55/06; B62D55/075; Y; Y10; Y10S; Y10S280/00; Y10S280/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A POWER OPERATED STAIR CLIMBING CONVEYANCE COMPRISING A MOBILE FRAME WITH A CHAIR SEAT MOUNTED THEREON AND INCLUDING TRANSVERSELY SPACED LONGITUDINAL FRAME SIDE MEMBERS, A PLURALITY OF PAIRS OF SUPPORT AND DRIVING UNITS MOUNTED UPON SAID FRAME SIDE MEMBERS AND INCLUDING FORWARD, CENTRAL AND REAR PAIRS OF UNITS, EACH PAIR OF UNITS HAVING ITS UNITS DISPOSED UPON THE EXTERIOR OUTER SURFACES OF SAID FRAME SIDE MEMBERS WITH EACH UNIT BEING MOUNTED SOLELY UPON ONE FRAME SIDE MEMBER, ADJUSTABLE CONNECTING MEANS EXTENDING TRANSVERSELY BETWEEN AND SECURED TO SAID FRAME SIDE MEMBERS AND CONNECTING THE LATTER FOR CONTROLLED MOVEMENT TOWARDS AND FROM EACH OTHER WHEREBY TO VARY THE WIDTH OF SAID CONVEYANCE, OPERATING MEANS CONNECTED TO SAID CONNECTING MEANS AND ACTUATING THE LATTER, A POWER SOURCE MOUNTED UPON SAID FRAME, DRIVING MEANS DISPOSED BETWEEN SAID FRAME SIDE MEMBERS AND CONNECTING SAID POWER SOURCE TO EACH UNIT OF A PAIR OF UNITS AND CONNECTING SAID CENTRAL PAIR OF UNITS TO SAID FORWARD AND REAR PAIRS OF UNITS, SAID DRIVING MEANS REMAINING CONNECTED TO SAID CENTRAL PAIR OF UNITS DURING ACTUATION OF SAID CONNECTING MEANS BY SAID OPERATING MEANS.
Claim 2
Dependent Claim
185 words
A POWER OPERATED STAIR CLIMBING CONVEYANCE COMPRISING A MOBILE FRAME WITH A CHAIR SEAT MOUNTED THEREON AND INCLUDING TRANSVERSELY SPACED LONGITUDINAL FRAME SIDE MEMBERS, A PLURALITY OF PAIRS OF SUPPORT AND DRIVING UNITS MOUNTED UPON SAID FRAME SIDE MEMBERS AND INCLUDING FORWARD, CENTRAL AND REAR PAIRS OF UNITS, EACH PAIR OF UNITS HAVING ITS UNITS DISPOSED UPON THE EXTERIOR OUTER SURFACES OF SAID FRAME SIDE MEMBERS WITH EACH UNIT BEING MOUNTED SOLELY UPON ONE FRAME SIDE MEMBER, ADJUSTABLE CONNECTING MEANS EXTENDING TRANSVERSELY BETWEEN AND SECURED TO SAID FRAME SIDE MEMBERS AND CONNECTING THE LATTER FOR CONTROLLED MOVEMENT TOWARDS AND FROM EACH OTHER WHEREBY TO VARY THE WIDTH OF SAID CONVEYANCE, OPERATING MEANS CONNECTED TO SAID CONNECTING MEANS AND ACTUATING THE LATTER, A POWER SOURCE MOUNTED UPON SAID FRAME, DRIVING MEANS DISPOSED BETWEEN SAID FRAME SIDE MEMBERS AND CONNECTING SAID POWER SOURCE TO EACH UNIT OF A PAIR OF UNITS AND CONNECTING SAID CENTRAL PAIR OF UNITS TO SAID FORWARD AND REAR PAIRS OF UNITS, SAID DRIVING MEANS REMAINING CONNECTED TO SAID CENTRAL PAIR OF UNITS DURING ACTUATION OF SAID CONNECTING MEANS BY SAID OPERATING MEANS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |