Patent US4976854A successfully refreshed from Google Patents.
Patent US3284830A successfully refreshed from Google Patents.
US3284830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweeping machine brush mounting apparatus
Assignee: Tennant Co
•
Filing: 1965-10-04
•
Granted: 1966-11-15
•
Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Merville O Kroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:44
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/24; A47L11/40; A47L11/4036; A47L11/4038; A47L11/4041; A47L11/4063; A47L11/4069; E; E01; E01H; E01H1/00; E01H1/08; E01H1/0827; E01H1/0854
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN A FLOOW MAINTENANCE MACHINE HAVING A CYLINDRICAL FLOOR MAINTENANCE TOOL MOUNTED THEREON FOR ROTATION ON A GENERALLY HORIZONTAL AXIS, SAID TOOL INCLUDING A HOLLOW CORE HAVING GENERALLY CYLINDRICAL WALLS AT LEAST AT THE ENDS THEREOF, SAID CORE INCLUDING KEY-NOTCHES IN THE WALL ADJACENT THE ENDS OF SAID CORE, MANDRELS ROTATABLY MOUNTED ON THE MACHINE, SAID MANDRELS BEING ENGAGEABLE INTO THE HOLLOW CYLINDRICAL WALL ENDS OF THE CORE FOR ROTATABLY SUPPORTING SAID CORE, EACH OF SAID MANDRELS INCLUDING A CYLINDRICAL SURFACE HAVING A SLIDING FIT INTO THE CYLINDRICAL WALL ENDS OF THE CORE, AND KEY-MEANS ON THE MANDRELS, FOR FITTING INTO THE KEY-NOTCHES OF THE CORE, FOR ROTATING THE CORE AND MANDRELS TOGETHER, SAID KEY-MEANS ON AT LEAST ONE OF THE MANDRELS COMPRISING DEFLECTABLE MEANS FITTED INTO A RECESS IN THE CYLINDRICAL SURFACE OF THE MANDREL AND DEPRESSIBLE THEREINTO, SAID DEFLECTABLE KEY-MEANS BEING ENGAGEABLE BY THE CYLINDRICAL WALL ENDS OF THE CORE FOR DEPRESSING SAID KEY-MEANS INTO THE MANDREL, SAID KEY-
Claim 2
Dependent Claim
161 words
IN A FLOOW MAINTENANCE MACHINE HAVING A CYLINDRICAL FLOOR MAINTENANCE TOOL MOUNTED THEREON FOR ROTATION ON A GENERALLY HORIZONTAL AXIS, SAID TOOL INCLUDING A HOLLOW CORE HAVING GENERALLY CYLINDRICAL WALLS AT LEAST AT THE ENDS THEREOF, SAID CORE INCLUDING KEY-NOTCHES IN THE WALL ADJACENT THE ENDS OF SAID CORE, MANDRELS ROTATABLY MOUNTED ON THE MACHINE, SAID MANDRELS BEING ENGAGEABLE INTO THE HOLLOW CYLINDRICAL WALL ENDS OF THE CORE FOR ROTATABLY SUPPORTING SAID CORE, EACH OF SAID MANDRELS INCLUDING A CYLINDRICAL SURFACE HAVING A SLIDING FIT INTO THE CYLINDRICAL WALL ENDS OF THE CORE, AND KEY-MEANS ON THE MANDRELS, FOR FITTING INTO THE KEY-NOTCHES OF THE CORE, FOR ROTATING THE CORE AND MANDRELS TOGETHER, SAID KEY-MEANS ON AT LEAST ONE OF THE MANDRELS COMPRISING DEFLECTABLE MEANS FITTED INTO A RECESS IN THE CYLINDRICAL SURFACE OF THE MANDREL AND DEPRESSIBLE THEREINTO, SAID DEFLECTABLE KEY-MEANS BEING ENGAGEABLE BY THE CYLINDRICAL WALL ENDS OF THE CORE FOR DEPRESSING SAID KEY-MEANS INTO THE MANDREL, SAID KEY-
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |