US3102737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure equalizing tow bar for boat trailers
Assignee: Individual
•
Filing: 1962-04-30
•
Granted: 1963-09-03
•
Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Robert K Williams
- 👤 James E Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:28
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/06; B60P3/10; B60P3/1033; B60P3/1083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A TELESCOPIC TOW BAR FOR A BOAT TRAILER HAVING A PLURALITY OF WHEEL BEARING HOUSINGS, SAID TOW BAR COMPRISING: A FIRST LONGITUDINALLY EXTENDING SECTION CONNECTED TO THE BOAT TRAILER; A SECOND LONGITUDINALLY EXTENDING SECTION ADAPTED TO BE CONNECTED TO A TOWING VEHICLE, SAID FIRST AND SECOND SECTIONS BEING SLIDABLE IN TELESCOPING RELATIONSHIP; AND MEANS PROVIDING A PASSAGE FOR AIR FROM THE TRAILER WHEEL BEARING HOUSINGS TO SAID FIRST SECTION, SAID SECTIONS INCLUDING INTERNAL AIR PASSAGES COMMUNICATING WITH THE ATMOSPHERE ADJACENT THE FORWARD EXTREMITY OF SAID SECOND SECTION.
Claim 2
Dependent Claim
87 words
A TELESCOPIC TOW BAR FOR A BOAT TRAILER HAVING A PLURALITY OF WHEEL BEARING HOUSINGS, SAID TOW BAR COMPRISING: A FIRST LONGITUDINALLY EXTENDING SECTION CONNECTED TO THE BOAT TRAILER; A SECOND LONGITUDINALLY EXTENDING SECTION ADAPTED TO BE CONNECTED TO A TOWING VEHICLE, SAID FIRST AND SECOND SECTIONS BEING SLIDABLE IN TELESCOPING RELATIONSHIP; AND MEANS PROVIDING A PASSAGE FOR AIR FROM THE TRAILER WHEEL BEARING HOUSINGS TO SAID FIRST SECTION, SAID SECTIONS INCLUDING INTERNAL AIR PASSAGES COMMUNICATING WITH THE ATMOSPHERE ADJACENT THE FORWARD EXTREMITY OF SAID SECOND SECTION.
References Cited (Backward Citations)
US3032353A
Cited
US3044567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |