GB1495540A - Hydrostatic transmission - Google Patents
Hydrostatic transmissionInfo
- Publication number
- GB1495540A GB1495540A GB4416573A GB4416573A GB1495540A GB 1495540 A GB1495540 A GB 1495540A GB 4416573 A GB4416573 A GB 4416573A GB 4416573 A GB4416573 A GB 4416573A GB 1495540 A GB1495540 A GB 1495540A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- relief valve
- line
- low pressure
- pump
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4157—Control of braking, e.g. preventing pump over-speeding when motor acts as a pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
- F16H39/02—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motors at a distance from liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
1495540 Hydrostatic transmission control MELFORD ENG Ltd 9 Dec 1974 [20 Sept 1973] 44165/73 Heading F2W In a hydrostatic transmission wherein a variable displacement swash plate pump 1 is in closed circuit 10, 11 with a fixed or variable displacement motor 2, a selectively operable low pressure relief valve 8 permits flow from the line 11 to the line 10 for reducing or preventing overrun braking. The valve 8 may be mechanically or electrically operated to permit low pressure relief therethrough when the line 11 is the return line to the pump 1. The control of the valve 8 may be interconnected with the pump displacement control. The usual high pressure relief valves 6, 7 are provided and an engine driven make-up pump 3 delivers to the working circuit through one-way valves 4. A stop cock 13 may be provided in the cross line 12 additional to the relief valve 8. In Fig. 2 (not shown) a valve (20) selectively connects the line 11 either to a high pressure relief valve (16) or to a low pressure relief valve (18). The control of the valve (20) may be interconnected with the pump displacement control. In Fig. 3 (not shown) a single relief valve (26) is selectively connected through a valve (30) with a high pressure pilot relief valve (36) or a low pressure pilot relief valve (38) which relief valves condition the relief valve (26) for high and low pressure relief respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4416573A GB1495540A (en) | 1974-12-09 | 1974-12-09 | Hydrostatic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4416573A GB1495540A (en) | 1974-12-09 | 1974-12-09 | Hydrostatic transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1495540A true GB1495540A (en) | 1977-12-21 |
Family
ID=10432082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4416573A Expired GB1495540A (en) | 1974-12-09 | 1974-12-09 | Hydrostatic transmission |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1495540A (en) |
-
1974
- 1974-12-09 GB GB4416573A patent/GB1495540A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |