Patent US3176334A successfully refreshed from Google Patents.
US3176334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible ramp and stair units
Assignee: Individual
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Filing: 1961-08-28
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Granted: 1965-04-06
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Expires: 1981-08-28
Abstract
No abstract record available.
Inventors
- 👤 Kenneth P Lovdahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:23
CPC Classifications
B; B60; B60R; B60R3/00; B60R3/02; E; E06; E06C; E06C5/00; E06C5/02; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10036; Y10T152/10045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A FOLDING RAMP HAVING A HINGE AT ONE END ADAPTED TO BE SECURED TO A VEHICLE, SAID RAMP COMPRISING A PLURALITY OF TRANSVERSELY HINGED SEGMENTS HAVING PARALLEL UPSTANDING FLANGES ALONG THE OUTER EDGES THEREOF TO PREVENT PASSAGE THEREOVER OF THE WHEELS OF THE VEHICLE, SAID SEGMENTS HAVING A HINGED TREAD ELEMENT CUT OUT OF THE CENTER THEREOF AND SUPPORTED AT ITS HINGE-FREE END BY A U-SHAPED ROD BRACKET FASTENED TO THE SEGMENT, SAID BRACKET BEING ADAPTED TO RETAIN THE TREAD IN A STAIR-LIKE POSITION, SAID TREAD CUT-OUT BEING OF NARROWER GAGE THAN THAT OF THE RAMP BETWEEN FLANGES TO PROVIDE FOR TRACKWAYS BETWEEN THE CUT-OUT AND THE UPSTANDING FLANGES LATCH MEANS FOR RETAINING SAID TREADS FLUSH WITH THE RAMP SEGMENTS, AND MANUAL PULLWIRE MEANS CONNECTED TO SAID LATCH MEANS FOR RELEASAL THEREOF.
Claim 2
Dependent Claim
132 words
A FOLDING RAMP HAVING A HINGE AT ONE END ADAPTED TO BE SECURED TO A VEHICLE, SAID RAMP COMPRISING A PLURALITY OF TRANSVERSELY HINGED SEGMENTS HAVING PARALLEL UPSTANDING FLANGES ALONG THE OUTER EDGES THEREOF TO PREVENT PASSAGE THEREOVER OF THE WHEELS OF THE VEHICLE, SAID SEGMENTS HAVING A HINGED TREAD ELEMENT CUT OUT OF THE CENTER THEREOF AND SUPPORTED AT ITS HINGE-FREE END BY A U-SHAPED ROD BRACKET FASTENED TO THE SEGMENT, SAID BRACKET BEING ADAPTED TO RETAIN THE TREAD IN A STAIR-LIKE POSITION, SAID TREAD CUT-OUT BEING OF NARROWER GAGE THAN THAT OF THE RAMP BETWEEN FLANGES TO PROVIDE FOR TRACKWAYS BETWEEN THE CUT-OUT AND THE UPSTANDING FLANGES LATCH MEANS FOR RETAINING SAID TREADS FLUSH WITH THE RAMP SEGMENTS, AND MANUAL PULLWIRE MEANS CONNECTED TO SAID LATCH MEANS FOR RELEASAL THEREOF.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |