US3247990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hopper lock for a street sweeper
Assignee: Elgin Sweeper Co
•
Filing: 1963-10-11
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Granted: 1966-04-26
•
Expires: 1983-10-11
Abstract
No abstract record available.
Inventors
- 👤 Ernest F Prescott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:28
CPC Classifications
E; E01; E01H; E01H1/00; E01H1/02; E01H1/04; E01H1/047; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1075; Y10T292/1082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A STREET SWEEPER A HOUSING, AN UPWARDLY INCLINED CONVEYOR WITHIN SAID HOUSING, A DIRT BOX HAVING A FLOOR NORMALLY DISPOSED IN A HORIZONTAL PLANE BELOW AN UPPER END PORTION OF SAID CONVEYOR, A DOOR PIVOTALLY MOUNTED ON SAID HOUSING FOR PIVOTAL MOVEMENT ABOUT A HORIZONTAL AXIS POSITIONED ABOVE THE FLOOR, DOOR PIVOTING MEANS ACTING BETWEEN SAID DOOR AND SAID HOUSING FOR PIVOTING SAID DOOR OUTWARDLY, MEANS FOR LOCKING AND PIVOTING SAID DOOR COMPRISING A PAIR OF UNITS DISPOSED INSIDE SAID HOUSING ON OPPOSITE SIDES OF SAID DIRT BOX, EACH UNIT INCLUDING A CYLINDER ATTACHED TO A SIDE WALL OF SAID HOUSING,
Claim 2
Dependent Claim
102 words
IN A STREET SWEEPER A HOUSING, AN UPWARDLY INCLINED CONVEYOR WITHIN SAID HOUSING, A DIRT BOX HAVING A FLOOR NORMALLY DISPOSED IN A HORIZONTAL PLANE BELOW AN UPPER END PORTION OF SAID CONVEYOR, A DOOR PIVOTALLY MOUNTED ON SAID HOUSING FOR PIVOTAL MOVEMENT ABOUT A HORIZONTAL AXIS POSITIONED ABOVE THE FLOOR, DOOR PIVOTING MEANS ACTING BETWEEN SAID DOOR AND SAID HOUSING FOR PIVOTING SAID DOOR OUTWARDLY, MEANS FOR LOCKING AND PIVOTING SAID DOOR COMPRISING A PAIR OF UNITS DISPOSED INSIDE SAID HOUSING ON OPPOSITE SIDES OF SAID DIRT BOX, EACH UNIT INCLUDING A CYLINDER ATTACHED TO A SIDE WALL OF SAID HOUSING,
References Cited (Backward Citations)
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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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |