US3893576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating platform elevator
Assignee: Individual
•
Filing: 1973-09-17
•
Granted: 1975-07-08
•
Expires: 1993-09-17
Abstract
Abstract A rotating platform elevator for use particularly by wheelchair occupants in ascending and descending from a motor vehicle comprises a vertical support post and a sleeve slidably mounted on the post. A platform is mounted on the sleeve. A drive is connected to the sleeve or platform for reciprocating them between raised and lowered positions. Cam means interconnect the post and sleeve and operate to rotate the sleeve and platform in a horizontal plane through a selected angle of rotation at a predetermined elevation of the platform.
Inventors
- 👤 Chris D Casady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:53
CPC Classifications
A; A61; A61G; A61G3/00; A61G3/02; A61G3/06; A61G3/062; Y; Y10; Y10S; Y10S414/00; Y10S414/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A rotating platform elevator comprising: a. a vertical support pipe, b. securing means for securing the support pipe to a structural member, c. a sleeve slidably mounted on the pipe, d. platform means mounted on the sleeve, e. drive means connected to the sleeve or platform for reciprocating them between raised and lowered positions relative to the support pipe, and f. cam means interconnecting the pipe and the sleeve and operative to rotate the sleeve and the platform in a horizontal plane through a selected angle of rotation at a predetermined elevation of the platform, the cam means comprising a vertical slot on the pipe having a reverse turn in its upper end and a cooperating cam follower fixed to the sleeve and received in the slot, the slot having a J shape with the leg of the J corresponding to the position of the platform inside the vehicle being shorter than the leg of the J corresponding to the position of the platform outside the vehicle, whereby the platform may be lowered slightly in the inside position of the platform.
Claim 2
Dependent Claim
181 words
A rotating platform elevator comprising: a. a vertical support pipe, b. securing means for securing the support pipe to a structural member, c. a sleeve slidably mounted on the pipe, d. platform means mounted on the sleeve, e. drive means connected to the sleeve or platform for reciprocating them between raised and lowered positions relative to the support pipe, and f. cam means interconnecting the pipe and the sleeve and operative to rotate the sleeve and the platform in a horizontal plane through a selected angle of rotation at a predetermined elevation of the platform, the cam means comprising a vertical slot on the pipe having a reverse turn in its upper end and a cooperating cam follower fixed to the sleeve and received in the slot, the slot having a J shape with the leg of the J corresponding to the position of the platform inside the vehicle being shorter than the leg of the J corresponding to the position of the platform outside the vehicle, whereby the platform may be lowered slightly in the inside position of the platform.
References Cited (Backward Citations)
US2148932A
Cited
US2762519A
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US3516559A
Cited
US3651965A
Cited
US3757963A
Cited
US3750815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |