US3724108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plow depth adjustment apparatus
Assignee: Hudswell Yates Developments Ltd
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Filing: 1971-01-29
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Granted: 1973-04-03
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Expires: 1991-01-29
Abstract
Abstract A mole plough comprises a wheeled carriage on which is pivotally mounted an elongated rigid beam carrying at its rear end a coulter provided with a mole. The beam is pivotally connected at a point intermediate in its length to the rear ends of a pair of forwardly-extending tension links whose front ends are pivoted to the front end of the carriage. The links thus transmit the majority of the tractive force from the carriage to the beam and thence to the coulter and mole. The beam is supported at an adjustable height by means of a pair of pivoted raising rams acting between the carriage and the links near their rear ends. At its front end the beam is provided with a grading control ram acting between the front end of the beam and the front end of the carriage, extension and contraction of the grading control ram altering the height of the front end of the beam relatively to the carriage.
Inventors
- 👤 E Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:48
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/10; E02F5/102
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
153 words
A mole plough comprising a carriage, an elongate rigid beam having a coulter rigidly secured to and depending from its rearward end, means for moving said coulter between a transporting position and a working position, a forwardly extending tension-transmitting linkage pivotally connecting said beam to said carriage so that said beam is substantially parallel to said carriage, said linkage having a rearward end pivotally connected to said beam and a forward end pivotally connected to said carriage and being at a small angle to the horizontal when said coulter is in its working position so as to transmit the major part of the tractive effort between said carriage and said coulter, and a displacement control device for varying the draught of said coulter relative to said carriage, said device acting between said beam and said carriage and being operable to raise and lower said forward end of said beam relative to said carriage.
Claim 2
Dependent Claim
153 words
A mole plough comprising a carriage, an elongate rigid beam having a coulter rigidly secured to and depending from its rearward end, means for moving said coulter between a transporting position and a working position, a forwardly extending tension-transmitting linkage pivotally connecting said beam to said carriage so that said beam is substantially parallel to said carriage, said linkage having a rearward end pivotally connected to said beam and a forward end pivotally connected to said carriage and being at a small angle to the horizontal when said coulter is in its working position so as to transmit the major part of the tractive effort between said carriage and said coulter, and a displacement control device for varying the draught of said coulter relative to said carriage, said device acting between said beam and said carriage and being operable to raise and lower said forward end of said beam relative to said carriage.
Claim 3
Dependent Claim
30 words
A mole plough according to claim 1 wherein the pivotal connection of the tension-transmitting linkage to the beam is located at an intermediate region in the length of the beam.
Claim 4
Dependent Claim
24 words
A mole plough according to claim 1 wherein the displacement control device is connected to the beam at the forward end of the beam.
Claim 5
Dependent Claim
21 words
A mole plough according to claim 1 wherein the displacement control device comprises a fluid pressure ram pivoted to the beam.
Claim 6
Dependent Claim
20 words
A mole plough according to claim 4 wherein said ram has a longitudinal axis which extends transversely to the beam.
Claim 7
Dependent Claim
37 words
A mole plough according to claim 5 wherein the ram has a further pivot connection to one of the carriage and the tension-transmitting linkage, extension and contraction of the ram varying the distance between its pivot connections.
Claim 8
Dependent Claim
71 words
A mole plough according to claim 1 wherein the displacement control device comprises a fluid-pressure ram pivoted to the beam, the axis of the ram extending above the length of the beam, and wherein the ram has a further pivot connection to one arm of a bell-crank lever pivoted at its fulcrum to the beam, the other arm of the bell-crank lever being coupled through an intermediate link to the carriage.
Claim 9
Dependent Claim
35 words
A mole plough according to claim 1 wherein said means for moving said coulter between its transporting position and its working position comprises a raising ram actuated by fluid pressure and mounted on the carriage.
Claim 10
Dependent Claim
38 words
A mole plough according to claim 8 wherein the raising ram has a first pivot connection with the carriage and a second, upwardly displaceable pivot connection adjacent the rear pivotal connection of the tension-transmitting linkage to the beam.
Claim 11
Dependent Claim
23 words
A mole plough according to claim 9 wherein the second pivotal connection of the raising ram attaches the ram to the tension-transmitting linkage.
Claim 12
Dependent Claim
35 words
A mole plough according to claim 1 wherein the plough is provided with a traction member on the carriage below the level of the beam, to which traction member a towing vehicle can be coupled.
Claim 13
Dependent Claim
28 words
A mole plough as claimed in claim 1, wherein the carriage is provided at its forward end with a ground-engaging support which is vertically-adjustable relatively to the carriage.
Claim 14
Dependent Claim
50 words
A mole plough as claimed in claim 12 in which the ground-engaging support comprises a skid plate pivoted at its forward edge about a transverse pivotal axis to an anchorage on the forward end of the carriage and adjustable by being tilted about and downwardly below the said pivotal axis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |