Patent US5500933A successfully refreshed from Google Patents.
Patent US3159286A successfully refreshed from Google Patents.
US3159286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill pipe handling apparatus
Assignee: Individual
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Filing: 1963-10-17
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Granted: 1964-12-01
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Expires: 1983-10-17
Abstract
No abstract record available.
Inventors
- 👤 Sr Richard B Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:34
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/14; E21B19/15; E21B19/155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN COMBINATION WITH A DELIVERY CHUTE FROM WHICH ELONGATED MEMBERS ARE GRAVITY FED, AN ARTICLE HANDLING AND UNLOADING DEVICE COMPRISING; A TRACK FRAME, A PAIR OF CARRIAGES SLIDABLY MOUNTED ON SAID TRACK FRAME, BIASING MEANS MOUNTED ON SAID TRACK FRAME AND OPERATIVELY CONNECTED TO ONE OF SAID CARRIAGES FOR CONTROLLING ACCELERATION AND DECELERATION THEREOF UPON DISPLACEMENT OF THE OTHER OF SAID CARRIAGES FROM A LOADING TO AN UNLOADING POSITION, SELECTIVELY CONTROLLED STOP MEANS MOUNTED ON SAID TRACK FRAME FOR LIMITING MOVEMENT OF THE OTHER OF THE CARRIAGES TO SAID UNLOADING POSITION AND HOLDING SAID OTHER CARRIAGE IN SAID UNLOADING POSITION, SHOCK ABSORBING MEANS MOUNTED ON SAID OTHER CARRIAGE FOR ABSORBING IMPACT OF AN ELONGATED MEMBER ACCELERATED BY SAID ONE CARRIAGE, RELEASABLE SUPPORT MEANS MOUNTED ON SAID CARRIAGES FOR SUPPORTING THE ELONGATED MEMBER THEREBETWEEN, UNLOADING MEANS OPERATIVELY CONNECTED TO SAID RELEASABLE SUPPORT MEANS FOR DISCHARGING THE ELONGATED MEMBER FROM THE CARRIAGES WHEN THE OTHER CARRIAGE IS HELD IN THE
Claim 2
Dependent Claim
158 words
IN COMBINATION WITH A DELIVERY CHUTE FROM WHICH ELONGATED MEMBERS ARE GRAVITY FED, AN ARTICLE HANDLING AND UNLOADING DEVICE COMPRISING; A TRACK FRAME, A PAIR OF CARRIAGES SLIDABLY MOUNTED ON SAID TRACK FRAME, BIASING MEANS MOUNTED ON SAID TRACK FRAME AND OPERATIVELY CONNECTED TO ONE OF SAID CARRIAGES FOR CONTROLLING ACCELERATION AND DECELERATION THEREOF UPON DISPLACEMENT OF THE OTHER OF SAID CARRIAGES FROM A LOADING TO AN UNLOADING POSITION, SELECTIVELY CONTROLLED STOP MEANS MOUNTED ON SAID TRACK FRAME FOR LIMITING MOVEMENT OF THE OTHER OF THE CARRIAGES TO SAID UNLOADING POSITION AND HOLDING SAID OTHER CARRIAGE IN SAID UNLOADING POSITION, SHOCK ABSORBING MEANS MOUNTED ON SAID OTHER CARRIAGE FOR ABSORBING IMPACT OF AN ELONGATED MEMBER ACCELERATED BY SAID ONE CARRIAGE, RELEASABLE SUPPORT MEANS MOUNTED ON SAID CARRIAGES FOR SUPPORTING THE ELONGATED MEMBER THEREBETWEEN, UNLOADING MEANS OPERATIVELY CONNECTED TO SAID RELEASABLE SUPPORT MEANS FOR DISCHARGING THE ELONGATED MEMBER FROM THE CARRIAGES WHEN THE OTHER CARRIAGE IS HELD IN THE
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |