US3949889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Front end loader
Assignee: Allis Chalmers Corp
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Filing: 1975-01-13
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Granted: 1976-04-13
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Expires: 1995-01-13
Abstract
Abstract A front end loader attachment utilizing front and rear supports connected to the front and intermediate parts of a tractor to which a loader frame is detachably connected. The rear support is reinforced by a longitudinally extending truss structure connected to the drawbar mounting point beneath the rear of the tractor. A grill guard is pivotable from an upright position to a downwardly extending, inverted position in which it is capable of supporting the loader and loader frame when removed from the tractor. The loader frame has longitudinally extending braces which cooperatively engage a pair of coupling parts on the front support whereby the tractor and attachment are guidingly coupled as the tractor is driven forwardly into the loader frame as it rests on the inverted grill guard.
Inventors
- 👤 Richard G. Moe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:52
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/627; E02F3/6273
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
228 words
A front end loader attachment for a tractor comprising: a support structure including a front support adapted for rigid connection to the front of a tractor including a pair of laterally spaced coupling parts, and a rear support including a transverse beam adapted to extend beneath and to be connected to an intermediate pair of the main frame of said tractor and having transversely opposite ends adapted for connection to and support of a loader frame said ends being disposed outwardly from opposite sides of said tractor when said support is installed thereon and a longitudinally extending truss structure rigidly secured at its front end to that part of said transverse beam that is beneath said main frame of said tractor when said support is installed thereon and adapted at its rear end for connection to the underside of the final drive housing of said tractor at the point where the drawbar is attached, a loader frame including a pair of laterally spaced and longitudinally extending side frames releasably attached at their lower rear ends to said opposite ends, respectively, of said beam and having coupling components at their forward ends in cooperative emgagement with said coupling parts, respectively, and a pair of upstanding boom support members, and a loader having a pair of longitudinally extending booms pivotably attached at their rear ends to said boom support members.
Claim 2
Dependent Claim
228 words
A front end loader attachment for a tractor comprising: a support structure including a front support adapted for rigid connection to the front of a tractor including a pair of laterally spaced coupling parts, and a rear support including a transverse beam adapted to extend beneath and to be connected to an intermediate pair of the main frame of said tractor and having transversely opposite ends adapted for connection to and support of a loader frame said ends being disposed outwardly from opposite sides of said tractor when said support is installed thereon and a longitudinally extending truss structure rigidly secured at its front end to that part of said transverse beam that is beneath said main frame of said tractor when said support is installed thereon and adapted at its rear end for connection to the underside of the final drive housing of said tractor at the point where the drawbar is attached, a loader frame including a pair of laterally spaced and longitudinally extending side frames releasably attached at their lower rear ends to said opposite ends, respectively, of said beam and having coupling components at their forward ends in cooperative emgagement with said coupling parts, respectively, and a pair of upstanding boom support members, and a loader having a pair of longitudinally extending booms pivotably attached at their rear ends to said boom support members.
Claim 3
Dependent Claim
86 words
The attachment of claim 1 and further comprising a grill guard pivotably connected at its lower end to the front end of said side frames on a transverse pivot axis and releasable fastening means securing said guard to said side frames maintaining said guard in a substantially upright position, said grill guard being pivotable downward to a substantially inverted position upon release of said fastening means whereby said guard is operable to support said loader and loader frame when the latter is detached from said tractor.
Claim 4
Dependent Claim
36 words
The attachment of claim 1 wherein said side frames present downwardly facing slide surfaces which guidingly and slidingly engage said front support when said tractor is driven forwardly to couple the loader frame to said supports.
Claim 5
Dependent Claim
13 words
The attachment of claim 3 wherein said slide surfaces engage said coupling parts.
Claim 6
Dependent Claim
27 words
The attachment of claim 4 wherein said front support includes a transverse member adapted for releasable connection to the underside of the front end of said tractor.
Claim 7
Dependent Claim
29 words
The attachment of claim 1 wherein said truss structure includes a pair of longitudinally extending and laterally spaced braces ridigly secured at their forward ends to said transverse beam.
Claim 8
Dependent Claim
75 words
The attachment of claim 1 and further comprising a grill guard pivotably connected to the front ends of said side frames adajcent said coupling components for swinging movement about a transverse axis between a substantially upright position to a downwardly extending inverted position, said grill guard being operable to support said loader and loader frame in its inverted position, and fastening means releasably securing said grill guard to said side frame in its upright position.
References Cited (Backward Citations)
FR1240195A
Cited
US3460690A
Cited
US3554396A
Cited
US3612311A
Cited
DE1924269A1
Cited
US3863786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |