Patent US3157978A successfully refreshed from Google Patents.
US3157978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking hub for a rotary disc lawn mower blade
Assignee: Individual
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Filing: 1963-06-05
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Granted: 1964-11-24
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Expires: 1983-06-05
Abstract
No abstract record available.
Inventors
- 👤 Frederick L Mcmullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:47
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; F; F16; F16D; F16D7/00; F16D7/02; A01D2101/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
233 words
A LOCKING HUB BLADE ADAPTER FOR A ROTARY LAWNMOWER COMPRISING, IN COMBINATION, A DRIVEN SHAFT HAVING AN END, A FLANGE MEMBER, A FIRST BORE DEFINED IN SAID FLANGE MEMBER ADAPTED TO FIXEDLY RECEIVE SAID END OF SAID DRIVEN SHAFT, A THREADED BORE DEFINED IN SAID FLANGE MEMBER CONCENTRIC WITH SAID FIRST BORE, A RADIALLY EXTENDING LOWER SURFACE DEFINED ON SAID FLANGE MEMBER, A LOCK CAP HAVING RADIALLY EXTENDING FLANGE DEFINED ON SAID LOCK CAP, A AN UPPER AND A LOWER SURFACE, A THREADED STEM DEFINED ON SAID LOCK CAP ADAPTED TO MATINGLY COOPERATE WITH THE THREADS DEFINED IN SAID THREADED BORE OF SAID FLANGE MEMBER, A CONCENTRIC, THREADED BORE DEFINED IN SAID END OF SAID SHAFT, A BORE DEFINED IN SAID SHAFT, A SHOULDER EXTENDING THROUGH SAID STEM, A THREADED LOCK BOLT EXTENDING THROUGH SAID LOCK CAP BORE MATING WITH THE THREADS OF SAID THREADED BORE DEFINED IN SAID SHAFT, A SHOULDER DEFINED ON SAID BOLT ADAPTED TO OPERATIVELY ABUT SAID LOCK CAP LOWER SURFACE UPON TIGHTENING OF SAID BOLT INTO SAID SHAFT, THE THREADS OF SAID STEM AND SAID LOCK BOLT BEING OF LIKE HAND AND DIFFERENT PITCH, THE PITCH OF THE THREADS OF SAID STEM BEING GREATER THAN THAT OF THE THREADS OF SAID LOCK BOLT, A ROTARY MOWER BLADE BEING ADAPTED TO BE CLAMPED BETWEEN SAID LOWER SURFACE OF SAID FLANGE MEMBER AND THE UPPER SURFACE OF SAID LOCK CAP.
Claim 2
Dependent Claim
233 words
A LOCKING HUB BLADE ADAPTER FOR A ROTARY LAWNMOWER COMPRISING, IN COMBINATION, A DRIVEN SHAFT HAVING AN END, A FLANGE MEMBER, A FIRST BORE DEFINED IN SAID FLANGE MEMBER ADAPTED TO FIXEDLY RECEIVE SAID END OF SAID DRIVEN SHAFT, A THREADED BORE DEFINED IN SAID FLANGE MEMBER CONCENTRIC WITH SAID FIRST BORE, A RADIALLY EXTENDING LOWER SURFACE DEFINED ON SAID FLANGE MEMBER, A LOCK CAP HAVING RADIALLY EXTENDING FLANGE DEFINED ON SAID LOCK CAP, A AN UPPER AND A LOWER SURFACE, A THREADED STEM DEFINED ON SAID LOCK CAP ADAPTED TO MATINGLY COOPERATE WITH THE THREADS DEFINED IN SAID THREADED BORE OF SAID FLANGE MEMBER, A CONCENTRIC, THREADED BORE DEFINED IN SAID END OF SAID SHAFT, A BORE DEFINED IN SAID SHAFT, A SHOULDER EXTENDING THROUGH SAID STEM, A THREADED LOCK BOLT EXTENDING THROUGH SAID LOCK CAP BORE MATING WITH THE THREADS OF SAID THREADED BORE DEFINED IN SAID SHAFT, A SHOULDER DEFINED ON SAID BOLT ADAPTED TO OPERATIVELY ABUT SAID LOCK CAP LOWER SURFACE UPON TIGHTENING OF SAID BOLT INTO SAID SHAFT, THE THREADS OF SAID STEM AND SAID LOCK BOLT BEING OF LIKE HAND AND DIFFERENT PITCH, THE PITCH OF THE THREADS OF SAID STEM BEING GREATER THAN THAT OF THE THREADS OF SAID LOCK BOLT, A ROTARY MOWER BLADE BEING ADAPTED TO BE CLAMPED BETWEEN SAID LOWER SURFACE OF SAID FLANGE MEMBER AND THE UPPER SURFACE OF SAID LOCK CAP.
References Cited (Backward Citations)
US2651530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |