US3241815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-trailer landing gear assembly
Assignee: Doosan Bobcat North America Inc
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Filing: 1963-11-21
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Granted: 1966-03-22
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Expires: 1983-11-21
Abstract
No abstract record available.
Inventors
- 👤 Hammond Evan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:44
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/58; B60D1/66; B60S; B60S9/00; B60S9/14; B60S9/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
FOR USE WITH A SEMI-TRAILER, A LANDING GEAR ASSEMBLY COMPRISING A RETRACTABLE LANDING GEAR CONNECTED TO THE SEMI-TRAILER FOR FORWARD AND REARWARD MOVEMENT, THE SAID LANDING GEAR INCLUDING RETRACTABLE GROUND ENGAGING MEANS AND MEANS FOR EXTENDING AND RETRACTING THE SAID GROUND ENGAGING MEANS, A SCREW DISPOSED WITH ITS AXIS ALIGNED IN A SUBSTANTIALLY FORWARD-REARWARD POSITION RELATIVE TO THE SEMI-TRAILER AND CONNECTED TO THE SAID LANDING GEAR, MEANS CONNECTING THE SAID SCREW TO THE SAID EXTENDING AND RETRACTING MEANS SO THAT ACTUATION OF THE SAID EXTENDING AND RETRACTING MEANS CAUSES ROTATION OF SAID SCREW, A NUT THREADADABLY ENGAGED BY THE SAID SCREW AND CONNECTED TO THE SEMI-TRAILER FOR FORWARD AND REARWARD MOVEMENT, STOP MEANS FOR LIMITING THE FORWARD MOVEMENT OF THE SAID NUT, MEANS FOR LOCKING THE SAID NUT IN ITS FORWARDMOST POSITION, AND MEANS RESPONSIVE TO FORWARD MOVEMENT OF THE SAID LANDING GEAR PAST A PREDETERMINED POSITION FOR RELEASING THE SAID LOCKING MEANS.
Claim 2
Dependent Claim
153 words
FOR USE WITH A SEMI-TRAILER, A LANDING GEAR ASSEMBLY COMPRISING A RETRACTABLE LANDING GEAR CONNECTED TO THE SEMI-TRAILER FOR FORWARD AND REARWARD MOVEMENT, THE SAID LANDING GEAR INCLUDING RETRACTABLE GROUND ENGAGING MEANS AND MEANS FOR EXTENDING AND RETRACTING THE SAID GROUND ENGAGING MEANS, A SCREW DISPOSED WITH ITS AXIS ALIGNED IN A SUBSTANTIALLY FORWARD-REARWARD POSITION RELATIVE TO THE SEMI-TRAILER AND CONNECTED TO THE SAID LANDING GEAR, MEANS CONNECTING THE SAID SCREW TO THE SAID EXTENDING AND RETRACTING MEANS SO THAT ACTUATION OF THE SAID EXTENDING AND RETRACTING MEANS CAUSES ROTATION OF SAID SCREW, A NUT THREADADABLY ENGAGED BY THE SAID SCREW AND CONNECTED TO THE SEMI-TRAILER FOR FORWARD AND REARWARD MOVEMENT, STOP MEANS FOR LIMITING THE FORWARD MOVEMENT OF THE SAID NUT, MEANS FOR LOCKING THE SAID NUT IN ITS FORWARDMOST POSITION, AND MEANS RESPONSIVE TO FORWARD MOVEMENT OF THE SAID LANDING GEAR PAST A PREDETERMINED POSITION FOR RELEASING THE SAID LOCKING MEANS.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |