Patent US3284093A successfully refreshed from Google Patents.
US3284093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair lift
Assignee: Individual
•
Filing: 1964-03-19
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Granted: 1966-11-08
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Expires: 1984-03-19
Abstract
No abstract record available.
Inventors
- 👤 Albert N Engelmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:38
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/04; B62B3/06; B62B3/0625; Y; Y10; Y10S; Y10S297/00; Y10S297/04; Y10T; Y10T292/00; Y10T292/08; Y10T292/0911; Y10T292/0926; Y10T292/0928; Y10T292/0934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
A CHAIR LIFT COMPRISING: (A) A HORIZONTAL FRAME HAVING A SUPPORTING SURFACE AND DEFINING FRONT AND REAR PORTIONS, (B) A PAIR OF SPACED FRONT LEGS EQUIPPED WITH WHEELS AND DISPOSED ADJACENT THE FRONT PORTION OF SAID FRAME, AT LEAST ONE OF SAID FRONT LEGS HAVING A SUPPORT PORTION EXTENDING IN A LATERAL DIRECTION, (C) A PAIR OF SPACED REAR LEGS EQUIPPED WITH WHEELS AND DISPOSED ADJACENT THE REAR PORTION OF SAID FRAME, (D) MEANS MOUNTING SAID FRONT AND REAR LEGS TO SAID FRAME FOR PIVOTAL MOVEMENTS ABOUT SPACED GENERALLY LATERALLY AND HORIZONTALLY EXTENDING AXES AND BETWEEN COLLAPSED POSITIONS DEFINING A LOWER POSITION OF SAID FRAME, TO PERMIT MOVEMENT OF THE FRAME UNDER A CHAIR, AND GENERALLY UPRIGHT POSITIONS FOR ELEVATING AND SUPPORTING A CHAIR, (E) MEANS CONNECTED SAID FRONT LEGS TO SAID REAR LEGS FOR CONCERTED MOVEMENT THEREOF, (F) A GENERALLY FLAT FOOT REST MEMBER POSITIONED ADJACENT SAID FRONT LEGS AND PROJECTING FORWARDLY THEREOF, SAID FOOT REST MEMBER BEING PIVOTALLY MOUNTED TO SAID FRAME AT A POSITION REARWARDLY OF SAID FRONT LEGS AND ALSO ENGAGING SAID SUPPORT PORTION OF SAID ONE OF THE FRONT LEGS FOR SLIDING MOVEMENT WITH RESPECT TO SAID FRONT LEGS UPON PIVOTAL MOVEMENT OF THE LATTER.
Claim 2
Dependent Claim
200 words
A CHAIR LIFT COMPRISING: (A) A HORIZONTAL FRAME HAVING A SUPPORTING SURFACE AND DEFINING FRONT AND REAR PORTIONS, (B) A PAIR OF SPACED FRONT LEGS EQUIPPED WITH WHEELS AND DISPOSED ADJACENT THE FRONT PORTION OF SAID FRAME, AT LEAST ONE OF SAID FRONT LEGS HAVING A SUPPORT PORTION EXTENDING IN A LATERAL DIRECTION, (C) A PAIR OF SPACED REAR LEGS EQUIPPED WITH WHEELS AND DISPOSED ADJACENT THE REAR PORTION OF SAID FRAME, (D) MEANS MOUNTING SAID FRONT AND REAR LEGS TO SAID FRAME FOR PIVOTAL MOVEMENTS ABOUT SPACED GENERALLY LATERALLY AND HORIZONTALLY EXTENDING AXES AND BETWEEN COLLAPSED POSITIONS DEFINING A LOWER POSITION OF SAID FRAME, TO PERMIT MOVEMENT OF THE FRAME UNDER A CHAIR, AND GENERALLY UPRIGHT POSITIONS FOR ELEVATING AND SUPPORTING A CHAIR, (E) MEANS CONNECTED SAID FRONT LEGS TO SAID REAR LEGS FOR CONCERTED MOVEMENT THEREOF, (F) A GENERALLY FLAT FOOT REST MEMBER POSITIONED ADJACENT SAID FRONT LEGS AND PROJECTING FORWARDLY THEREOF, SAID FOOT REST MEMBER BEING PIVOTALLY MOUNTED TO SAID FRAME AT A POSITION REARWARDLY OF SAID FRONT LEGS AND ALSO ENGAGING SAID SUPPORT PORTION OF SAID ONE OF THE FRONT LEGS FOR SLIDING MOVEMENT WITH RESPECT TO SAID FRONT LEGS UPON PIVOTAL MOVEMENT OF THE LATTER.
References Cited (Backward Citations)
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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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |