US3590929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulldozer blade mounting
Assignee: Caterpillar Inc
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Filing: 1968-08-15
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Granted: 1971-07-06
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Expires: 1988-08-15
Abstract
Abstract A bulldozer blade mounting for minimizing mechanical stresses during tilting of the blade and for maintaining generally constant blade pitch during raising and lowering of the blade, comprising three generally parallel members pivotally mounted between the blade and its supporting vehicle. Two of the members are parallel push arms arranged in a generally horizontal plane relatively adjacent the base of the blade. The third member is an extendible link arranged in a generally central location between the vehicle and an upper portion of the blade to provide triangular support for the blade and to permit pitching of the blade.
Inventors
- 👤 Leon A Wirt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:02
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/8157
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
191 words
A mounting arrangement for supporting a bulldozer blade assembly upon a vehicle, comprising a push arm pivotally interconnected between each side of the vehicle and a respective side of the blade assembly generally at its base, an elongated member pivotally interconnected between the vehicle and a central portion of the blade assembly above the pivotal connections between the blade assembly and push arms, lift means for raising and lowering the blade relative to the vehicle, the means comprising a generally vertical link pivotally connected with each respective push arm and lift motor means interconnected between the vehicle and both of the links, and tilt means for tilting the blade about a longitudinal axis of the vehicle, the tilt means comprising a hydraulic cylinder forming at least a portion of one of the vertical links, said lift motor means and said vertical link being interconnected by lever means pivoted upon the vehicle, and connected to each link, and a spreader beam rigidly interconnected between the levers, and so that the tilt cylinder is operable independently of the lift motor means with minimum stress being developed in the mounting arRangement and blade assembly.
Claim 2
Dependent Claim
191 words
A mounting arrangement for supporting a bulldozer blade assembly upon a vehicle, comprising a push arm pivotally interconnected between each side of the vehicle and a respective side of the blade assembly generally at its base, an elongated member pivotally interconnected between the vehicle and a central portion of the blade assembly above the pivotal connections between the blade assembly and push arms, lift means for raising and lowering the blade relative to the vehicle, the means comprising a generally vertical link pivotally connected with each respective push arm and lift motor means interconnected between the vehicle and both of the links, and tilt means for tilting the blade about a longitudinal axis of the vehicle, the tilt means comprising a hydraulic cylinder forming at least a portion of one of the vertical links, said lift motor means and said vertical link being interconnected by lever means pivoted upon the vehicle, and connected to each link, and a spreader beam rigidly interconnected between the levers, and so that the tilt cylinder is operable independently of the lift motor means with minimum stress being developed in the mounting arRangement and blade assembly.
Claim 3
Dependent Claim
33 words
The invention of claim 1 where one of the levers is a bellcrank with a side arm, the lift motor means being a hydraulic cylinder interconnected between the vehicle and the side arm.
Claim 4
Dependent Claim
58 words
The invention of claim 1 wherein the elongated member, the push arms and the generally vertical spacing of the respective pivots for the member and push arms form a quadrilateral, the lengths of the member and push arms and the vertical spacing being selected to pitch the blade slightly forwardly as it is lowered to improve blade penetration.
Claim 5
Dependent Claim
26 words
The invention of claim 1 wherein the elongated member is biaxially pivoted to the vehicle and blade assembly and includes motor means for varying blade pitch.
Claim 6
Dependent Claim
19 words
The invention of claim 4 wherein the pivotal connections on the push arms and elongated member are ball-and-socket joints.
Claim 7
Dependent Claim
46 words
The invention of claim 1 further comprising diagonal bracing members extending inwardly from the push arms and an articulated joint between the inwardly extending ends of the members, one of the bracing members being connected with the blade assembly for stability of the blade and mounting.
Claim 8
Dependent Claim
36 words
The invention of claim 6 wherein the one bracing member is connected with the blade assembly by means of a linkage permitting limited motion of the blade assembly toward and away from the diagonal bracing members.
References Cited (Backward Citations)
US2239943A
Cited
US2681518A
Cited
US3049821A
Cited
US3226860A
Cited
US3158944A
Cited
US3337974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |