GB1344672A - Road-maintenance machine with blade - Google Patents
Road-maintenance machine with bladeInfo
- Publication number
- GB1344672A GB1344672A GB4017571A GB4017571A GB1344672A GB 1344672 A GB1344672 A GB 1344672A GB 4017571 A GB4017571 A GB 4017571A GB 4017571 A GB4017571 A GB 4017571A GB 1344672 A GB1344672 A GB 1344672A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- inclination
- horizontal
- cylinder
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000012423 maintenance Methods 0.000 title abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
- E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
- E02F3/845—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically using mechanical sensors to determine the blade position, e.g. inclinometers, gyroscopes, pendulums
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
- G05D3/14—Control of position or direction using feedback using an analogue comparing device
- G05D3/18—Control of position or direction using feedback using an analogue comparing device delivering a series of pulses
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Milling, Drilling, And Turning Of Wood (AREA)
- Road Paving Machines (AREA)
- Operation Control Of Excavators (AREA)
Abstract
1344672 Automatic attitude control N G JOHANSSON 26 Aug 1971 [27 Aug 1970] 40175/71 Heading G3R [Also in Division E1] In a road maintenance machine, a blade is maintained horizontal, irrespective of the attitude of the machine, by hydraulic or pneumatic means, which are actuated by electrical pulses from a pulse generator via a switch, responsive to the inclination of the blade to the horizontal, the pulses being interrupted when the blade is horizontal. In the embodiment shown, the machine 1, Fig. 1 has a blade 2 supported on collar 3, cylinder 6 adjusting the angle of the blade to the direction of movement of the vehicle, cylinders 4, 5 controlling the inclination of the blade to the horizontal. A pulse generator, including resistors 13, 14 Fig.2 to set the pulse width and frequency respectively, capacitor C and transistor T 1 , in series with a winding of relay R across a D.C. source, supplies pulses to energise relay R, closing contact R 1 and energising electrically operated valves 10 or 11 according to the blade inclination as sensed by device 12, thus allowing fluid to pass via switch 8, from pump 7 to cylinder 4 whose double acting piston 4a is pivotably fixed to the collar 3 supporting the blade. Cylinder 5 is similarly controlled. Relay R may be omitted and the pulse applied direct to sensor 12. Faster correction, by increasing pulse width or amplitude, may be used if device 12 senses an inclination greater than a preset value. In an alternative, the pulse generator may be a variable speed motor operating a micro-switch.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1162070A SE338748B (en) | 1970-08-27 | 1970-08-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1344672A true GB1344672A (en) | 1974-01-23 |
Family
ID=20294303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4017571A Expired GB1344672A (en) | 1970-08-27 | 1971-08-26 | Road-maintenance machine with blade |
Country Status (5)
| Country | Link |
|---|---|
| CA (1) | CA975453A (en) |
| DE (1) | DE2142446A1 (en) |
| FR (1) | FR2103568B3 (en) |
| GB (1) | GB1344672A (en) |
| SE (1) | SE338748B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2129034A (en) * | 1982-10-29 | 1984-05-10 | Kubota Ltd | Tractor with a scraper |
-
1970
- 1970-08-27 SE SE1162070A patent/SE338748B/xx unknown
-
1971
- 1971-08-25 DE DE19712142446 patent/DE2142446A1/en active Pending
- 1971-08-26 CA CA121,449A patent/CA975453A/en not_active Expired
- 1971-08-26 GB GB4017571A patent/GB1344672A/en not_active Expired
- 1971-08-27 FR FR7131196A patent/FR2103568B3/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2129034A (en) * | 1982-10-29 | 1984-05-10 | Kubota Ltd | Tractor with a scraper |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2142446A1 (en) | 1972-03-02 |
| FR2103568A3 (en) | 1972-04-14 |
| SE338748B (en) | 1971-09-13 |
| CA975453A (en) | 1975-09-30 |
| FR2103568B3 (en) | 1973-11-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |