US3645340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for a dozer blade
Assignee: Case LLC
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Filing: 1969-11-05
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Granted: 1972-02-29
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Expires: 1989-11-05
Abstract
Abstract A control system for a dozer blade or the like incorporating valving for combining with a tilt control for the blade tilt motors and hydraulic circuitry for the lift motors to additionally provide blade pitch control. Also disclosed is a ball and socket connection for connecting the dozer blade to the dozer frame.
Inventors
- 👤 Claude M Frisbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:26
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/84
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
282 words
A control system for adjusting a vehicle dozer blade comprising a source of pressure fluid, and a pair of doubleacting tilt motors operatively connected to the blade for rotating the blade about the longitudinal axis of the vehicle to vary the blade tilt, the tilt motors each having an operating end thereof, connected to the source and the opposite end thereof in fluid communication with the corresponding end of the other tilt motor, tilt motor control valve means selectively operative to separately connect the operating end of one of the tilt motors to the source and to discharge the operating end of the other tilt motor so as to cause the tilt motors to rotate the blade about the longitudinal axis of the vehicle, a pair of blade adjusting motors operatively connected to the blade for maneuvering the blade about another axis of the vehicle, blade adjusting motor valve control means selectively operative to connect and disconnect the pair of blade adjusting motors to and from the source so as to cause the blade to be maneuvered about the other axis of the vehicle, and manually operable valve means in fluid communication with the opposite ends of the tilt motors, the pair of blade adjusting motors and the blade adjusting motor control valve means for selectively connecting the opposite ends of the tilt motors to the source by way of the blade adjusting motor valve control means so that the fluid to the opposite ends of the tilt motors can be pressurized or relieved when the blade adjusting motor control means is operated and the pitch of the blade varied by operation of the tilt motors by the tilt motor control means.
Claim 2
Dependent Claim
282 words
A control system for adjusting a vehicle dozer blade comprising a source of pressure fluid, and a pair of doubleacting tilt motors operatively connected to the blade for rotating the blade about the longitudinal axis of the vehicle to vary the blade tilt, the tilt motors each having an operating end thereof, connected to the source and the opposite end thereof in fluid communication with the corresponding end of the other tilt motor, tilt motor control valve means selectively operative to separately connect the operating end of one of the tilt motors to the source and to discharge the operating end of the other tilt motor so as to cause the tilt motors to rotate the blade about the longitudinal axis of the vehicle, a pair of blade adjusting motors operatively connected to the blade for maneuvering the blade about another axis of the vehicle, blade adjusting motor valve control means selectively operative to connect and disconnect the pair of blade adjusting motors to and from the source so as to cause the blade to be maneuvered about the other axis of the vehicle, and manually operable valve means in fluid communication with the opposite ends of the tilt motors, the pair of blade adjusting motors and the blade adjusting motor control valve means for selectively connecting the opposite ends of the tilt motors to the source by way of the blade adjusting motor valve control means so that the fluid to the opposite ends of the tilt motors can be pressurized or relieved when the blade adjusting motor control means is operated and the pitch of the blade varied by operation of the tilt motors by the tilt motor control means.
Claim 3
Dependent Claim
30 words
The control system described in claim 1, wherein the pair of blade adjusting motors raise and lower the blade about an axis that is transverse to the vehicle longitudinal axis.
Claim 4
Dependent Claim
250 words
A control system for adjusting a vehicle dozer blade comprising a source of pressure fluid, a pair of tilt motors of the piston type operatively connected to the blade, for rotating the blade about a longitudinal axis of the vehicle, the tilt motors each having the rod ends thereof in fluid communication and the head ends thereof arranged to be connected separately to the source, tilt motor control valve means selectively operative to separately connect the head end of one of the tilt motors to the source and to discharge the head end of the other tilt motor so as to cause the blade to be tilted, a pair of blade-adjusting motors operatively connected to the blade for maneuvering the blade about another axis of the vehicle, blade adjusting motor control valve means for selectively connecting the pair of blade-adjusting motors to the source for rendering the blade-adjusting motors operative, manually operable valve means in fluid communication with the opposite ends of the tilt motors, the pair of blade adjusting motors and the blade-adjusting motor control valve means for selectively connecting the rod ends of the tilt motors to the source by way of the blade-adjusting motor control valve means so that the fluid to the rod ends of the tilt motors can either be pressurized or relieved by operation of the blade-adjusting motor control valve means and thereby enable the tilt motors to be operated by the tilt motor control valve means to vary the pitch of the blade.
Claim 5
Dependent Claim
250 words
A control system for adjusting a vehicle dozer blade comprising a source of pressure fluid, a pair of tilt motors of the piston type operatively connected to the blade, for rotating the blade about a longitudinal axis of the vehicle, the tilt motors each having the rod ends thereof in fluid communication and the head ends thereof arranged to be connected separately to the source, tilt motor control valve means selectively operative to separately connect the head end of one of the tilt motors to the source and to discharge the head end of the other tilt motor so as to cause the blade to be tilted, a pair of blade-adjusting motors operatively connected to the blade for maneuvering the blade about another axis of the vehicle, blade adjusting motor control valve means for selectively connecting the pair of blade-adjusting motors to the source for rendering the blade-adjusting motors operative, manually operable valve means in fluid communication with the opposite ends of the tilt motors, the pair of blade adjusting motors and the blade-adjusting motor control valve means for selectively connecting the rod ends of the tilt motors to the source by way of the blade-adjusting motor control valve means so that the fluid to the rod ends of the tilt motors can either be pressurized or relieved by operation of the blade-adjusting motor control valve means and thereby enable the tilt motors to be operated by the tilt motor control valve means to vary the pitch of the blade.
Claim 6
Dependent Claim
200 words
A control system for adjusting a vehicle dozer blade about a plurality of axes comprising a source of pressure fluid, a pair of tilt motors of the piston type operatively connected to the blade for rotating the blade about the longitudinal axis of the vehicle, the tilt motors each having the rod ends in fluid communication and the head ends thereof arranged to be separately connected to the source, tilt motor control valve means selectively operative to connect the head end of one of the tilt motors to the source and to discharge the head end of the other tilt motor so as to cause the tilt motors to tilt the blade, a pair of lift motors operatively connected to the blade for raising and lowering thE blade, control valve means for lifting motors, and manually operable valve means for connecting the rod ends of the tilt motors to the control valve means so that fluid in the rod ends of the tilt motors can either be pressurized or relieved by operation of the control valve means and thereby enable the tilt motors to be operated by the tilt motor control valve means to vary the pitch of the blade.
Claim 7
Dependent Claim
200 words
A control system for adjusting a vehicle dozer blade about a plurality of axes comprising a source of pressure fluid, a pair of tilt motors of the piston type operatively connected to the blade for rotating the blade about the longitudinal axis of the vehicle, the tilt motors each having the rod ends in fluid communication and the head ends thereof arranged to be separately connected to the source, tilt motor control valve means selectively operative to connect the head end of one of the tilt motors to the source and to discharge the head end of the other tilt motor so as to cause the tilt motors to tilt the blade, a pair of lift motors operatively connected to the blade for raising and lowering thE blade, control valve means for lifting motors, and manually operable valve means for connecting the rod ends of the tilt motors to the control valve means so that fluid in the rod ends of the tilt motors can either be pressurized or relieved by operation of the control valve means and thereby enable the tilt motors to be operated by the tilt motor control valve means to vary the pitch of the blade.
Claim 8
Dependent Claim
151 words
The control system of claim 1 which further includes a connection between said blade and the frame of said vehicle comprising a pair of opposed ears projecting from one of said frame or said blade having vertically axially aligned bores therein, a third ear projecting either from the other of said frame or said blade positioned between said opposed ears and having a bore therein which is axially aligned with said bores in said opposed ears, a swivel pin extending through said bores, said pin secured in position, a swivel ball mounted around said pin between said opposed ears and within said bore in said third ear and spaced from said opposed ears by spacing means, an outer race mounted in said bore of said third ear for said swivel ball, and means securing said race in position, whereby said blade is capable of movement around a horizontal and vertical 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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |