Patent US3145405A successfully refreshed from Google Patents.
US3145405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for adjusting the brush height in carpet sweepers
Assignee: Harrisburg University of Science and Technology
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Filing: 1963-06-24
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Granted: 1964-08-25
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 John M Hirmes
- 👤 Jerry W Poad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:41
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4052; A47L11/4058; A47L11/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A CARPET SWEEPER COMPRISING, A WHEELED HOUSING, A BRUSH AND TWO SLIDES, SAID BRUSH BEING ROTATABLY MOUNTED AT EACH END ON ONE OF SAID SLIDES AND SAID SLIDES BEING SECURED FOR LIMITED VERTICAL MOTION TO SAID HOUSING TO THEREBY PERMIT SAID BRUSH TO RIDE OVER SMALL OBSTRUCTIONS WHICH MIGHT BE ENCOUNTERED ON THE SURFACE TO BE SWEPT, BIASING MEANS URGING SAID BRUSH AND SLIDES DOWNWARDLY, STOP MEANS LIMITING THE EXTENT OF PERMISSIBLE DOWNWARD TRAVEL OF SAID BRUSH, A KNOB ROTATABLY CARRIED BY SAID HOUSING, AND A CRANKSHAFT OPERABLY CONNECTED TO SAID STOP MEANS AND SAID KNOB TO VARY THE POSITION OF SAID STOP MEANS TO A PLURALITY OF POSITIONS TO THEREBY SELECTIVELY CHANGE THE LOWEST POSITION TO WHICH SAID BRUSH MAY BE BIASED BY SAID BIASING MEANS YET TO PERMIT THE UPWARD TRAVEL REQUIRED TO RIDE OVER SAID SMALL OBSTRUCTIONS.
Claim 2
Dependent Claim
140 words
A CARPET SWEEPER COMPRISING, A WHEELED HOUSING, A BRUSH AND TWO SLIDES, SAID BRUSH BEING ROTATABLY MOUNTED AT EACH END ON ONE OF SAID SLIDES AND SAID SLIDES BEING SECURED FOR LIMITED VERTICAL MOTION TO SAID HOUSING TO THEREBY PERMIT SAID BRUSH TO RIDE OVER SMALL OBSTRUCTIONS WHICH MIGHT BE ENCOUNTERED ON THE SURFACE TO BE SWEPT, BIASING MEANS URGING SAID BRUSH AND SLIDES DOWNWARDLY, STOP MEANS LIMITING THE EXTENT OF PERMISSIBLE DOWNWARD TRAVEL OF SAID BRUSH, A KNOB ROTATABLY CARRIED BY SAID HOUSING, AND A CRANKSHAFT OPERABLY CONNECTED TO SAID STOP MEANS AND SAID KNOB TO VARY THE POSITION OF SAID STOP MEANS TO A PLURALITY OF POSITIONS TO THEREBY SELECTIVELY CHANGE THE LOWEST POSITION TO WHICH SAID BRUSH MAY BE BIASED BY SAID BIASING MEANS YET TO PERMIT THE UPWARD TRAVEL REQUIRED TO RIDE OVER SAID SMALL OBSTRUCTIONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |