US3400990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel-fitting device for wheelchairs
Assignee: Individual
•
Filing: 1966-11-23
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Granted: 1968-09-10
•
Expires: 1986-11-23
Abstract
No abstract record available.
Inventors
- 👤 Sato Yoshiko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:47
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
WHEEL SHAFT-FITTING DEVICE FOR WHEELCHAIRS, WHEREIN A SHAFT IS EXTERNALLY THREADED AT ONE END PORTION TO WHICH A CLAMPING NUT AND LOCK ARE THREADELY ENGAGED, A FLANGE INTEGRALLY FORMED AT THE OTHER END OF THE SHAFT, TWO BALL BEARINGS PROVIDED BETWEEN SAID FLANGE AND CLAMPING NUT, AN INTERMEDIATE PIPE PROVIDED BETWEEN SAID BALL BEARINGS, A HUB OF A WHEEL ABUTTINGLY ENGAGING THE OUTSIDE OF SAID BALL BEARINGS, A LEG FRAME HAVING A BORE, AND THE THREADED END OF SAID WHEEL SHAFT PASSED THROUGH SAID BORE PROVIDED IN SAID LEG FRAME, SAID LEG FRAME SECURED BETWEEN SAID CLAMPING NUT AND LOCK NUT.
Claim 2
Dependent Claim
101 words
WHEEL SHAFT-FITTING DEVICE FOR WHEELCHAIRS, WHEREIN A SHAFT IS EXTERNALLY THREADED AT ONE END PORTION TO WHICH A CLAMPING NUT AND LOCK ARE THREADELY ENGAGED, A FLANGE INTEGRALLY FORMED AT THE OTHER END OF THE SHAFT, TWO BALL BEARINGS PROVIDED BETWEEN SAID FLANGE AND CLAMPING NUT, AN INTERMEDIATE PIPE PROVIDED BETWEEN SAID BALL BEARINGS, A HUB OF A WHEEL ABUTTINGLY ENGAGING THE OUTSIDE OF SAID BALL BEARINGS, A LEG FRAME HAVING A BORE, AND THE THREADED END OF SAID WHEEL SHAFT PASSED THROUGH SAID BORE PROVIDED IN SAID LEG FRAME, SAID LEG FRAME SECURED BETWEEN SAID CLAMPING NUT AND LOCK NUT.
References Cited (Backward Citations)
DE828168C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |