Patent US3077841A successfully refreshed from Google Patents.
US3077841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic pivoted latching hook for swinging lever dual swinging door operating mechanism
Assignee: Individual
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Filing: 1956-01-26
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Granted: 1963-02-19
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Expires: 1976-01-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas T Lunde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:15
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0911; Y10T292/0937; Y10T292/0938; Y10T292/0944; Y10T292/0945; Y10T292/0951; Y10T292/1039; Y10T292/1041; Y10T292/1043; Y10T292/1075; Y10T292/1083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A HOPPER CAR HAVING PIVOTED DOORS, A ROCK-SHAFT, CRANK MEANS CONNECTED TO SAID ROCK-SHAFT, CONNECTING RODS INTERCONNECTING SAID CRANK MEANS WITH SAID DOORS OF SAID CAR AND A LEVER ARM CONNECTED TO SAID ROCK-SHAFT, THE IMPROVEMENT WHICH COMPRISES: A PIN FIXEDLY MOUNTED ON SAID CAR AND SPACED RADIALLY FROM SAID ROCK-SHAFT; A ONEPIECE LATCH; PIVOT MEANS CONNECTING SAID LATCH TO SAID LEVER ARM AT A POINT SPACED RADIALLY FROM SAID ROCKSHAFT AT A DISTANCE APPROXIMATELY EQUAL TO THE DISTANCE WHICH SAID PIN IS SPACED FROM SAID ROCK-SHAFT; A DETENT FORMED IN THE LOWER FACE OF SAID LATCH, POSITIONED TO MATE WITH SAID FIXED PIN AND PROVIDED WITH ONE SIDE LOCATED REMOTE FROM SAID PIVOT MEANS AND EXTENDING SUBSTANTIALLY
Claim 2
Dependent Claim
119 words
IN A HOPPER CAR HAVING PIVOTED DOORS, A ROCK-SHAFT, CRANK MEANS CONNECTED TO SAID ROCK-SHAFT, CONNECTING RODS INTERCONNECTING SAID CRANK MEANS WITH SAID DOORS OF SAID CAR AND A LEVER ARM CONNECTED TO SAID ROCK-SHAFT, THE IMPROVEMENT WHICH COMPRISES: A PIN FIXEDLY MOUNTED ON SAID CAR AND SPACED RADIALLY FROM SAID ROCK-SHAFT; A ONEPIECE LATCH; PIVOT MEANS CONNECTING SAID LATCH TO SAID LEVER ARM AT A POINT SPACED RADIALLY FROM SAID ROCKSHAFT AT A DISTANCE APPROXIMATELY EQUAL TO THE DISTANCE WHICH SAID PIN IS SPACED FROM SAID ROCK-SHAFT; A DETENT FORMED IN THE LOWER FACE OF SAID LATCH, POSITIONED TO MATE WITH SAID FIXED PIN AND PROVIDED WITH ONE SIDE LOCATED REMOTE FROM SAID PIVOT MEANS AND EXTENDING SUBSTANTIALLY
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |