US3674096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulldozer blade mounting
Assignee: CDI SALES CORP A MN CORP
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Filing: 1970-06-08
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Granted: 1972-07-04
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Expires: 1990-06-08
Abstract
Abstract A bulldozer blade mounting for slidably supporting the ram assemblies for the bulldozer blade while shielding the hydraulic actuator as the actuator extends and retracts.
Inventors
- 👤 David A Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:08
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
216 words
A bulldozer blade mounting on a tractor comprising, a C-frame pivotally supported on the chassis of the tractor and extending forwardly of said tractor, a bulldozer blade pivotally supported on the forward end of said C-frame, a ram assembly on each side of said tractor including a hydraulic actuator having a base end and a rod end, means pivotally connecting the base end of said hydraulic actuator to said C-frame, a cover connected to said Cframe and extending for substantially the length of said hydraulic actuator for covering said actuator, an arm defining a shield pivotally connected to the forward end of the rod end of said actuator and extending for substantially the length of the rod of said hydraulic actuator slidably movable within said cover, strut means and a push arm means each pivotally connected to the rearward portion of said arm and pivotally connected to said bulldozer blade, guide means mounted on said frame, mating guide means connected to said arm defining a slidable movement of said arm relative to said frame and supporting the rearward portion of said arm, said ram assembly thereby providing a hydraulic actuator shielded from foreign material and extending and retracting said ram assembly and maintaining a predetermined aligned movement of said ram assembly during angling of said blade.
Claim 2
Dependent Claim
216 words
A bulldozer blade mounting on a tractor comprising, a C-frame pivotally supported on the chassis of the tractor and extending forwardly of said tractor, a bulldozer blade pivotally supported on the forward end of said C-frame, a ram assembly on each side of said tractor including a hydraulic actuator having a base end and a rod end, means pivotally connecting the base end of said hydraulic actuator to said C-frame, a cover connected to said Cframe and extending for substantially the length of said hydraulic actuator for covering said actuator, an arm defining a shield pivotally connected to the forward end of the rod end of said actuator and extending for substantially the length of the rod of said hydraulic actuator slidably movable within said cover, strut means and a push arm means each pivotally connected to the rearward portion of said arm and pivotally connected to said bulldozer blade, guide means mounted on said frame, mating guide means connected to said arm defining a slidable movement of said arm relative to said frame and supporting the rearward portion of said arm, said ram assembly thereby providing a hydraulic actuator shielded from foreign material and extending and retracting said ram assembly and maintaining a predetermined aligned movement of said ram assembly during angling of said blade.
Claim 3
Dependent Claim
70 words
A bulldozer blade mounting on a tractor as set forth in claim 1 wherein said C-frame includes side beams pivotally supporting said bulldozer blade, said guide means on said C-frame defining runners connected to and extending longitudinally on two opposing sides of said side beams, said mating guide means on said arms defining brackets receiving said runners to control the movement of said ram assemblies when said blade is angled.
Claim 4
Dependent Claim
25 words
A bulldozer blade mounting on a tractor as set forth in claim 1 wherein said tractor includes a trunnion mounting means pivotally supporting said C-frame.
Claim 5
Dependent Claim
45 words
A bulldozer blade mounting on a tractor as set forth in claim 1 wherein said hydraulic actuator in said ram assembly includes a hydraulic cylinder having a base end connected to said C-frame and a rod end connected to the forward end of said arm.
Claim 6
Dependent Claim
53 words
A bulldozer blade mounting on a tractor as set forth in claim 4 wherein said arm defines a shield of greater length than said rod end of said hydraulic actuator, said cover mounted on said C-frame covering said hydraulic actuator extends for a greater length than the base end of said hydraulic cylinder.
Claim 7
Dependent Claim
41 words
A bulldozer blade mounting on a tractor as set forth in claim 1 wherein each ram assembly includes aN extendable strut means and a fixed length push arm means pivotally connected between one end of said bulldozer blade and said arm.
Claim 8
Dependent Claim
40 words
A bulldozer blade mounting on a tractor as set forth in claim 6 including a hydraulic actuator in each of said upper strut members adapted for providing extension of said strut actuators for changing the pitch of said bulldozer blade.
Claim 9
Dependent Claim
41 words
A bulldozer blade mounting on a tractor as set forth in claim 6 wherein each of said upper strut members includes a hydraulic actuator adapted for differential extension and contraction of said actuators to control the tilt of said bulldozer blade.
Claim 10
Dependent Claim
31 words
A bulldozer blade mounting on a tractor as set forth in claim 1 wherein said arm includes a trunnion mounting pivotally supporting said strut means pivotally connected to said bulldozer blade.
Claim 11
Dependent Claim
73 words
A bulldozer blade mounting on a tractor as set forth in claim 1 wherein said arm includes a trunnion mount pivotally supporting said strut means, a guide bracket connected to each of said arms, at least one runner on opposite sides of said C-frame received in said guide bracket to confine the movement of said ram assembly to a movement parallel to each side of said C-frame for angling of said bulldozer blade.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |