Patent US3592273A successfully refreshed from Google Patents.
US3592273A
Expired / Lapsed
US
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Bodily attachable bulldozing assembly for tractors
Assignee: WE MARTIN Co
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Filing: 1968-01-18
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Granted: 1971-07-13
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Expires: 1988-01-18
Abstract
Abstract This is a bodily attachable unitary bulldozing apparatus for conventional farm tractors or similar mobile power units and comprises a completely operable mechanism to manipulate a bulldozing blade as required to position such blade upwardly or downwardly as well as at a transverse angle in a vertical plane in relation to the surface being worked.
Inventors
- 👤 William E Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:31
CPC Classifications
A; A01; A01B; A01B59/00; A01B59/04; A01B59/048; A01B31/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
110 words
A self contained unitary operable bulldozer assembly adapted for bodily attachment with a structural portion of a farm tractor or the like comprising, in combination, a rigid structural tractor part, bracket means having attachable members for rigid securement with said tractor part, a bulldozer blade, laterally spaced blade adjustment and support means mounting said blade on said bracket means for vertical and bodily tilting movement relative thereto, each of said adjustment and support means including a parallelogram link assembly having universal pivot connections with said blade, and selectively operable power means associated with each said parallelogram link assembly and interconnected with said blade at one of said universal pivot connections.
Claim 2
Dependent Claim
110 words
A self contained unitary operable bulldozer assembly adapted for bodily attachment with a structural portion of a farm tractor or the like comprising, in combination, a rigid structural tractor part, bracket means having attachable members for rigid securement with said tractor part, a bulldozer blade, laterally spaced blade adjustment and support means mounting said blade on said bracket means for vertical and bodily tilting movement relative thereto, each of said adjustment and support means including a parallelogram link assembly having universal pivot connections with said blade, and selectively operable power means associated with each said parallelogram link assembly and interconnected with said blade at one of said universal pivot connections.
Claim 3
Dependent Claim
16 words
In the combination of claim 1, wherein said universal pivot connections comprise ball and socket bearings.
Claim 4
Dependent Claim
86 words
In the combination of claim 1, wherein there are two laterally spaced link assemblies supporting the blade at two laterally spaced locations along the length of the blade and said laterally spaced power means coact with each link member set to induce independent blade actuation of the blade at said laterally spaced locations to either raise or lower the blade and blade ends in unison or to alternately vertically actuate the blade ends in opposite relation to each other through opposite operation of said power means.
Claim 5
Dependent Claim
22 words
In the combination of claim 1, wherein the power means are hydraulic cylinders connected along a diagonal of said parallelogram link assemblies.
Claim 6
Dependent Claim
91 words
In the combination set forth and defined in claim 1, wherein said bracket means comprise widely spaced lateral side brackets to carry the link assemblies for spaced connection therefrom to said blade, brace legs to stabilize and to reinforce the side brackets and wherein said connected side brackets and brace legs are arranged with upwardly open space therebetween to permit the bracket means to avoid interference with the forward wheel axle of the tractor to which said bracket means is rigidly attached to support the blade and its operative link assemblies.
Claim 7
Dependent Claim
70 words
In the combination set forth and defined in claim 5, with the addition of an orientation member on said bracket means to bring the bulldozer assembly into a given relationship with respect to the rigid structural portion of the tractor, and adjustable fastening units connected with the side brackets and the brace legs respectively to attach the bracket structure into fixed position upon the rigid structural part of the tractor.
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |