US3171555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor loaders
Assignee: Frank G Hough Co
•
Filing: 1962-09-13
•
Granted: 1965-03-02
•
Expires: 1982-09-13
Abstract
No abstract record available.
Inventors
- 👤 Thorvald G Granryd
- 👤 Herbert A Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:07
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/402; E02F3/404; E02F3/401
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
, A TRACTOR LOADER COMPRISING A BOOM OPERATIVELY CARRIED ON SAID TRACTOR AND EXTENDING FORWARDLY THEREOF, A BUCKET COMPRISING A PAIR OF SPACED-APART SIDE WALLS INTERCONNECTED BY A BOTTOM AND REAR WALL, A CUTTING EDGE CARRIED ON THE FORWARD MARGINAL EDGE OF SAID BOTTOM WALL, MEANS FORMED ON THE REAR WALL OF SAID BUCKET FOR PIVOTALLY CARRYING AND CONNECTING SAID BUCKET ON THE FORWARD END OF THE BOOM SO THAT SAID BUCKET IS MOVABLE FROM A HORIZONTAL DIGGING POSITION TO A CERTAIN MAXIMUM LOAD CARRYING POSITION WHEREIN THE OPEN SIDE OF THE BUCKET IS DISPOSED SUBSTANTIALLY UPWARDLY, A LOAD STRIKING AND MAINTAINING MEMBER COMPRISING AT LEAST ONE LEVER, A CROSS-MEMBER CONNECTED TO SAID LEVER AND EXTENDING ACROSS THE UPPER PORTION OF SAID BUCKET, SAID CROSSMEMBER HAVING A LENGTH SUBSTANTIALLY EQUAL TO THE DISTANCE BETWEEN SAID SIDE WALLS OF SAID BUCKET, A ROTARY FLUID ACTUATOR MEANS SUCURED TO SAID REAR WALL PARALLEL TO SAID BUCKET PIVOTAL CONNECTION TO SAID BOOM FORWARD END, MEANS FOR PIVOTALLY CONNECTING SAID LEVER TO SAID ROTARY FLUID ACTUATOR MEANS FOR PIVOTAL CLOCKWISE AND COUNTERCLOCKWISE MOVEMENT OF SAID LEVER TO CARRY SAID CROSS-MEMBER OVER THE OPEN SIDE OF SAID BUCKET BETWEEN THE UPPER MARGINAL EDGE OF SAID REAR WALL AND SAID CUT-
Claim 2
Dependent Claim
205 words
, A TRACTOR LOADER COMPRISING A BOOM OPERATIVELY CARRIED ON SAID TRACTOR AND EXTENDING FORWARDLY THEREOF, A BUCKET COMPRISING A PAIR OF SPACED-APART SIDE WALLS INTERCONNECTED BY A BOTTOM AND REAR WALL, A CUTTING EDGE CARRIED ON THE FORWARD MARGINAL EDGE OF SAID BOTTOM WALL, MEANS FORMED ON THE REAR WALL OF SAID BUCKET FOR PIVOTALLY CARRYING AND CONNECTING SAID BUCKET ON THE FORWARD END OF THE BOOM SO THAT SAID BUCKET IS MOVABLE FROM A HORIZONTAL DIGGING POSITION TO A CERTAIN MAXIMUM LOAD CARRYING POSITION WHEREIN THE OPEN SIDE OF THE BUCKET IS DISPOSED SUBSTANTIALLY UPWARDLY, A LOAD STRIKING AND MAINTAINING MEMBER COMPRISING AT LEAST ONE LEVER, A CROSS-MEMBER CONNECTED TO SAID LEVER AND EXTENDING ACROSS THE UPPER PORTION OF SAID BUCKET, SAID CROSSMEMBER HAVING A LENGTH SUBSTANTIALLY EQUAL TO THE DISTANCE BETWEEN SAID SIDE WALLS OF SAID BUCKET, A ROTARY FLUID ACTUATOR MEANS SUCURED TO SAID REAR WALL PARALLEL TO SAID BUCKET PIVOTAL CONNECTION TO SAID BOOM FORWARD END, MEANS FOR PIVOTALLY CONNECTING SAID LEVER TO SAID ROTARY FLUID ACTUATOR MEANS FOR PIVOTAL CLOCKWISE AND COUNTERCLOCKWISE MOVEMENT OF SAID LEVER TO CARRY SAID CROSS-MEMBER OVER THE OPEN SIDE OF SAID BUCKET BETWEEN THE UPPER MARGINAL EDGE OF SAID REAR WALL AND SAID CUT-
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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |