US3090512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Front end loaders
Assignee: Dempster Brothers Inc
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Filing: 1958-08-07
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Granted: 1963-05-21
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Expires: 1978-08-07
Abstract
No abstract record available.
Inventors
- 👤 George R Dempster
- 👤 William A Herpich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:10
CPC Classifications
B; B65; B65F; B65F3/00; B65F3/02; B65F3/04; B60; B60P; B60P1/00; B60P1/48; B60P1/50; B65F2003/0263; B65F2003/0279
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
272 words
IN A FRONT END LOADER OF THE CHARACTER DESCRIBED, THE COMBINATION WITH A MOTOR VEHICLE OF THE TYPE HAVING A A BODY ADAPTED TO RECEIVE MATERIAL THEREDIN AND HAVING IN FRONT OF THE BODY AN OPERATOR''S CAB WITH WHEELS ON OPPOSITE SIDES THEREOF NEAR THE FRONT END THEREOF, OF A LOADING MECHANISM COMPRISING A PAIR OF RIGID LIFTING ARMS EACH HAVING A RIGID END PORTION PIVOTALLY MOUNTED ON SAID VEHICLE FOR SWINGING MOVEMENTS ABOUT A SUBSTANTIALLY HORIZONTAL AXIS LOCATED REARWARDLY OF SAID CAB, AND EACH ARM HAVING A SEPARATE END PORTION RIGID WITH THE FIRSTMENTIONED END PORTION AND SPACED FROM SAID PIVOTAL MOUNTING ON THE VEHICLE, MEANS FOR SWINGING SAID LIFTING ARMS ABOUT SAID AXIS BETWEEN A LOWERED POSITION IN WHICH SAID LAST-MENTIONED END PORTION OF SAID ARMS EXTEND FORWARDLY TO A LOCATION BELOW THE TOPS OF SAID WHEELS AND IN FRONT OF SAID CAB AND A RAISED POSITION IN WHICH SAID LAST-MENTIONED END PORTIONS OF SAID ARMS EXTEND UPWARDLY TO A LOCATION NEAR THE TOP OF SAID BODY, EACH OF SAID ARMS BEING OF A RIGID ANGULAR CONFIGURATION SUCH THAT, IN ITS LOWERED POSITION, IT EXTENDS OVER THE TOP OF THE ADJACENT WHEEL AND ITS FRONT END PORTION EXTENDS DOWNWARDLY TO SAID LOCATION BELOW THE TOP OF THE WHEEL AND IN FRONT OF THE CAB, MEANS ON THE FRONT PORTIONS OF SAID ARMS FOR DETACHABLE ENGAGEMENT WITH A CONTAINER TO LIFT THE CONTAINER UPON SWINGING MOVEMENT OF THE ARMS AND DUMP THE CONTENTS THEREFROM INTO SAID BODY, AND RIGID MEANS ON THE FRONT END PORTIONS OF THE ARMS FOR TRANSMITTING THE IMPACT OF ENGAGEMENT WITH THE CONTAINER TO THE MOTOR VEHICLE.
Claim 2
Dependent Claim
105 words
IN A FRONT END LOADER OF THE CHARACTER DESCRIBED, THE COMBINATION OF LOADING MECHANISM COMPRISING A PAIR OF LIFTING ARMS MOVABLE BETWEEN A LOWERED POSITION WHEREIN THE LIFTING ARMS EXTEND TO THE FRONT OF THE VEHICLE AND A RAISED POSITION WHEREIN THE LIFTING ARMS EXTEND OVER THE VEHICLE, MOUNTING MEANS FOR THE LIFTING ARMS AT ONE END THEREOF, A TORQUE TUBE CONNECTING THE ARMS TOGETHER AT THE OPPOSITE END THEREOF, MEANS FOR TURNING THE TORQUE TUBE RELATIVE TO THE ARMS, A CONTAINER, MEANS SUPPORTED BY THE TORQUE TUBE AND MOVABLE THEREWITH FOR HOLDING THE CONTAINER IN SPACED BEARING RELATION WITH RESPECT TO THE TORQUE TUBE.
Claim 3
Dependent Claim
253 words
IN A FRONT END LOADER OF THE CHARACTER DESCRIBED, THE COMBINATION WITH A MOTOR VEHICLE OF THE TYPE HAVING A BODY PROVIDED WITH AN OPENING IN THE TOP THEREOF ADAPTED TO RECEIVE MATERIAL THEREIN, OF A PAIR OF LIFTING ARMS PIVOTALLY MOUNTED ON THE VEHICLE FOR SWINGING MOVEMENT BETWEEN A LOWERED POSITION WHEREIN THE FREE ENDS OF THE LIFTING ARMS EXTEND TO THE FRONT OF THE VEHICLE AND A RAISED POSITION WHEREIN THE FREE ENDS OF THE LIFTING ARMS EXTEND OVER THE BODY; POWER MEANS FOR SWINGING THE LIFTING ARMS IN PATHS OF MOVEMENT TO SAID LOWERED AND RAISED POSITIONS; MEANS ON THE FREE ENDS OF THE LIFTING ARMS FOR DETACHABLY ENGAGING A SEPARABLE CONTAINER WHEN THE LIFTING ARMS ARE IN A LOWERED POSITIOIN AND COOPERATING TO LIFT A SEPARABLE CONTAINER IN A GENERALLY UPRIGHT POSITION TO AN ELEVATED LOCATION ABOVE THE BODY AND TO INVERT THE CONTAINER TO DUMP THE CONTENTS THEREOF INTO THE BODY; A BRACKET MEMBER MOUNTED ON AND MOIVABLE WITH EACH LIFTING ARM AND INCLUDING A BEARING SURFACE PROJECTING INWARDLY FROM THE LIFTING ARM, AND SUPPORT MEMBERS ON THE BODY AT OPPOSITE EDGES OF THE TOP OPENING AND SPACED INWARDLY FROM THE PATHS OF MOVEMENT OF THE ARMS, SAID BRACKET MEMBERS AND SUPPORT MEMBERS BEING IN POSITION TO BE ALIGNED IN ABUTTING RELATION WHEN THE LIFTING ARMS ARE IN THE RAISED POSITIION TO SUPPORT THE WEIGHT OF THE SEPARABLE CONTAINER AND TO STABILIZE THE FREE ENDS OF THE LIFTING ARMS DURING THE TIME THAT THE CONTAINER IS BEING INVERTED.
References Cited (Backward Citations)
US2459473A
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US2679326A
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US2643011A
Cited
US2824657A
Cited
US2824655A
Cited
US2900096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |