Surveyor field tripod
Abstract
Abstract A TRANSPORTABLE TRIPOD FOR HOLDING SURVEYING OR OTHER INSTRUMENTS, INCLUDING A BEAM FRAME WITH THREE SUPPORT ELEMENTS WHICH REST ON THE GROUND. A CENTRAL, VERTICAL BEAM IS HOLLOW TO SLIDEABLY RECEIVE AN INSTRUMENT SUPPORT STEM AND AN INCLINED BEAM EXTENDS FROM EACH SUPPORT ELEMENT TO CONNECT WITH THE CENTRAL, VERTICAL BEAM NEAR ITS TOP. A BEARING SLEEVE RESTS ON THE TOP OF THE VERTICAL BEAM TO BE ROTATABLE RELATIVE TO THE REMAINDER OF THE FRAME. A SEAT SUPPORT AND A COUNTER-BALANCING BRACKET ARE AFFIXED TO OPPOSITE SIDES OF THE BEARING SLEEVE AND TURNABLE THEREWITH. ALSO, AN INSTRUMENT GUIDE FORK IS CONNECTED TO THE SLEEVE TO EXTEND UPWARDLY PARALLEL TO THE STEM ABOVE THE SEAT SUPPORT. DURING TRANSPORT, THE FORWARD SUPPORT ELEMENT IS USED AS A HITCH FOR CONNECTION TO A PRIME MOVER. THE REARWARD TWO SUPPORT ELEMENTS ARE LINKED TO WHEELS WHICH ARE PIVOTED TO A TRAVEL POSITION. EACH OF THE SUPPORT ELEMENTS ARE PLATES WITH ANCHOR MEANS TO SECURE THE TRIPOD TO THE GROUND.
Inventors
- 👤 Donald J Hess
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |