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Patent US3833136A successfully refreshed from Google Patents.
US3833136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable front end loader
Assignee: Deere and Co
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Filing: 1972-07-03
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Granted: 1974-09-03
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Expires: 1992-07-03
Abstract
Abstract A front end loader adapted for releasable attachment to an agricultural tractor and having apparatus for facilitating removal of the loader from the tractor and for supporting the loader when so removed, the apparatus including an upright, rigid are pivotally connected at its lower end to the tractor frame and at its upper end to the loader arm, the arm extending upwardly and rearwardly from its lower to its upper pivotal connection and being swingable forwardly relative to the tractor as the latter is moved rearwardly relative to the loader, whereby the arm is operative to raise and then lower the loader as the tractor is moved rearwardly. A U-shaped parking stand is pivotally connected to the loader for movement between a raised inoperative position and a lowered operative position, the stand in the latter position being operative to engage the ground and support the loader relative thereto as the loader is lowered by the arm.
Inventors
- 👤 D Spicer
- 👤 G Perdue
- 👤 Gregor W Mac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:01
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/968; E02F3/627; E02F3/6273
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
208 words
In combination with a tractor having a frame and a loader adapted for releasable attachment to said frame, means for facilitating removal of the loader from the tractor and supporting the rear portion of the loader when so removed, comprising: an upright, rigid arm pivotally connected at its lower end to the tractor frame and at its upper end to the rear portion of the loader, said arm being swingable about its lower pivotal connection as the tractor is moved rearwardly relative to the loader from an initial position wherein said arm is inclined upwardly and rearwardly from said lower pivotal connection, to an intermediate position wherein said arm extends directly upwardly from said lower pivotal connection, and to a final position wherein said arm extends forwardly from said lower pivotal connection, whereby said arm is operative to first raise and then lower the rear portion of said loader relative to the tractor as the latter is moved rearwardly relative to the loader; and parking stand means connected to the loader for movement between operative and inoperative positions, the stand in the former position being operative to engage the ground and support the rear portion of the loader relative thereto as the loader is lowered by said arm.
Claim 2
Dependent Claim
208 words
In combination with a tractor having a frame and a loader adapted for releasable attachment to said frame, means for facilitating removal of the loader from the tractor and supporting the rear portion of the loader when so removed, comprising: an upright, rigid arm pivotally connected at its lower end to the tractor frame and at its upper end to the rear portion of the loader, said arm being swingable about its lower pivotal connection as the tractor is moved rearwardly relative to the loader from an initial position wherein said arm is inclined upwardly and rearwardly from said lower pivotal connection, to an intermediate position wherein said arm extends directly upwardly from said lower pivotal connection, and to a final position wherein said arm extends forwardly from said lower pivotal connection, whereby said arm is operative to first raise and then lower the rear portion of said loader relative to the tractor as the latter is moved rearwardly relative to the loader; and parking stand means connected to the loader for movement between operative and inoperative positions, the stand in the former position being operative to engage the ground and support the rear portion of the loader relative thereto as the loader is lowered by said arm.
Claim 3
Dependent Claim
69 words
The invention defined in claim 1 wherein the stand is pivotally connected to the loader for movement between a raised inoperative position and a lowered operative position, the lower end of the stand in the latter position being spaced from the ground and said stand being disposed to hang freely from its pivotal connection with the loader when the latter is raised to its maximum height by said arm.
Claim 4
Dependent Claim
40 words
The invention defined in claim 2 wherein the lower end of said stand is disposed rearwardly from the pivotal connection between the stand and loader when the stand is disposed to hang freely from its pivotal connection with the loader.
Claim 5
Dependent Claim
91 words
The invention defined in claim 1 wherein said tractor includes a front axle extending transversely beneath the frame; wherein said loader includes vertical support structure disposed rearwardly of said axle and having a lower end extending below the top side of saId axle when the loader is attached to said frame; and wherein the lower end of said support structure is raised to a position directly above and in spaced relation to the top side of said axle by said arm as the tractor is moved rearwardly relative to the loader.
Claim 6
Dependent Claim
79 words
The invention defined in claim 1 wherein the stand comprises a U-shaped member pivotally mounted on the loader for movement between a raised inoperative position and a lowered operative position, said U-shaped member in the former position and when the loader is attached to the tractor having a bight portion extending transversely across the front of the tractor and having side portions extending longitudinally along the sides of the tractor to rear end portions pivotally connected to the loader.
Claim 7
Dependent Claim
36 words
The invention defined in claim 5 including means for releasably retaining the stand in its raised inoperative position, said means being releasable to permit said stand to pivot downwardly about its pivotal connection with the loader.
Claim 8
Dependent Claim
41 words
The invention defined in claim 5 wherein the tractor includes a front axle extending transversely beneath the frame; and wherein the side portions of the U-shaped member extend longitudinally above said axle to rear end portions spaced rearwardly from said axle.
Claim 9
Dependent Claim
62 words
The invention defined in claim 7 including means for releasably retaining the stand in its raised inoperative position, said means being releasable to permit said stand to pivot downwardly about its pivotal connection with the loader, and wherein said axle is engageable with the side portions of said stand to limit its downward movement when the loader is attached to the tractor.
Claim 10
Dependent Claim
64 words
The invention defined in claim 8 wherein the pivotal connections between the side portions of the U-shaped member and the loader are disposed forwardly of said axle when the loader is raised to its maximum height relative to the tractor by the arm, whereby the U-shaped member is disposed to hang vertically downwardly from its pivotal connections with the loader forwardly of said axle.
Claim 11
Dependent Claim
66 words
The invention defined in claim 9 wherein the bight portion of said U-shaped member is spaced vertically from the ground when the member is disposed to hang vertically downwardly from its pivotal connections with the loader forwardly of said axle, said bight portion being engageable with the ground to support the rear portion of the loader relative thereto as the loader is lowered by said arm.
Claim 12
Dependent Claim
186 words
For use in combination with a tractor having a frame and a loader having a front end ground-engaging bucket and frame structure projecting rearwardly therefrom adapted for releasable connection to and disconnection from said frame, means for facilitating removal of the loader from the tractor when the loader framework is disconnected comprising: a rigid arm adapted for pivotal connection at one end to the tractor frame and at its other end to the rear portion of the loader framework, said arm being swingable forwardly about its pivotal connection with the frame as the tractor is moved rearwardly relative to the loader from an initial position wherein said arm is inclined upwardly and rearwardly from its pivotal connection with the frame, to an intermediate position wherein said arm extends directly upwardly from its pivotal connection with the frame, and to a final position wherein said arm extends forwardly from its pivotal connection with the frame, whereby said arm is operative to first raise and then lower the rear portion of the loader framework relative to the tractor as the latter is moved rearwardly relative to the loader.
Claim 13
Dependent Claim
186 words
For use in combination with a tractor having a frame and a loader having a front end ground-engaging bucket and frame structure projecting rearwardly therefrom adapted for releasable connection to and disconnection from said frame, means for facilitating removal of the loader from the tractor when the loader framework is disconnected comprising: a rigid arm adapted for pivotal connection at one end to the tractor frame and at its other end to the rear portion of the loader framework, said arm being swingable forwardly about its pivotal connection with the frame as the tractor is moved rearwardly relative to the loader from an initial position wherein said arm is inclined upwardly and rearwardly from its pivotal connection with the frame, to an intermediate position wherein said arm extends directly upwardly from its pivotal connection with the frame, and to a final position wherein said arm extends forwardly from its pivotal connection with the frame, whereby said arm is operative to first raise and then lower the rear portion of the loader framework relative to the tractor as the latter is moved rearwardly relative to the loader.
Claim 14
Dependent Claim
80 words
The invention defined in claim 11 including parking stand means adapted for mounting on the rear portion of the loader framework and movable between a raised inoperative position and a lowered operative position, the stand in the latter position being operative to engage the ground and support the rear portion of the loader framework relative thereto as the arm moves from its intermediate to its final position to lower the rear portion of the loader framework relative to the tractor.
Claim 15
Dependent Claim
61 words
The invention defined in claim 11 wherein the pivotal connection between the arm and the rear portion of the loader framework comprises a pin on the loader and an elongated, pin-receiving slot formed in the arm and opened at the upper end thereof whereby said arm is disengageable from said pin as the tractor is moved rearwardly relative to the loader.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |