GB1318958A - Hydraulic motor control circuits - Google Patents
Hydraulic motor control circuitsInfo
- Publication number
- GB1318958A GB1318958A GB4771270A GB4771270A GB1318958A GB 1318958 A GB1318958 A GB 1318958A GB 4771270 A GB4771270 A GB 4771270A GB 4771270 A GB4771270 A GB 4771270A GB 1318958 A GB1318958 A GB 1318958A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- fluid
- motor control
- control circuits
- hydraulic motor
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
1318958 Hydraulic motor control circuits CATERPILLAR TRACTOR CO 7 Oct 1970 [20 Oct 1969] 47712/70 Heading F1P Prevention of cavitation in the expanding head end 31 of a double acting hydraulic piston and cylinder 27, 26 when the contracting rod end 32 is subject to load reversal is effected by utilizing the pressure build-up in a portion of the return line 54, 43 upstream a restriction 17 to open a make-up check valve 42 thereby adding a portion of the high pressure return fluid to the delivery of a pump 13 in a line 51 connected by a conventional distributing valve 14 to a line 52 leading to the head end 31. Leakage make-up to the rod end 32 is affected during the return stroke through a check valve 66 when opened by low pressure resevoir fluid. The restriction 17 forms part of a fluid cooling means.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86784769A | 1969-10-20 | 1969-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1318958A true GB1318958A (en) | 1973-05-31 |
Family
ID=25350578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4771270A Expired GB1318958A (en) | 1969-10-20 | 1970-10-07 | Hydraulic motor control circuits |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE757696A (en) |
| CA (1) | CA923016A (en) |
| DE (1) | DE2051468A1 (en) |
| FR (1) | FR2066266A5 (en) |
| GB (1) | GB1318958A (en) |
| ZA (1) | ZA706827B (en) |
-
0
- BE BE757696D patent/BE757696A/en unknown
-
1970
- 1970-10-05 CA CA094811A patent/CA923016A/en not_active Expired
- 1970-10-07 ZA ZA706827A patent/ZA706827B/en unknown
- 1970-10-07 GB GB4771270A patent/GB1318958A/en not_active Expired
- 1970-10-20 FR FR7037862A patent/FR2066266A5/fr not_active Expired
- 1970-10-20 DE DE19702051468 patent/DE2051468A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2051468A1 (en) | 1971-04-29 |
| CA923016A (en) | 1973-03-20 |
| ZA706827B (en) | 1971-07-28 |
| BE757696A (en) | 1971-04-19 |
| FR2066266A5 (en) | 1971-08-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |