GB827983A - Improvements in or relating to hydraulic power transmission systems - Google Patents
Improvements in or relating to hydraulic power transmission systemsInfo
- Publication number
- GB827983A GB827983A GB2565656A GB2565656A GB827983A GB 827983 A GB827983 A GB 827983A GB 2565656 A GB2565656 A GB 2565656A GB 2565656 A GB2565656 A GB 2565656A GB 827983 A GB827983 A GB 827983A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- valve
- pressure
- pump
- engine
- 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
- 230000005540 biological transmission Effects 0.000 title 1
- 239000007788 liquid Substances 0.000 abstract 2
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C5/00—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
- E06C5/02—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members
- E06C5/04—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members capable of being elevated or extended ; Fastening means during transport, e.g. mechanical, hydraulic
- E06C5/06—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members capable of being elevated or extended ; Fastening means during transport, e.g. mechanical, hydraulic by piston and cylinder, or equivalent means, operated by a pressure medium
- E06C5/08—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members capable of being elevated or extended ; Fastening means during transport, e.g. mechanical, hydraulic by piston and cylinder, or equivalent means, operated by a pressure medium derived directly from a pressure reservoir
- E06C5/10—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members capable of being elevated or extended ; Fastening means during transport, e.g. mechanical, hydraulic by piston and cylinder, or equivalent means, operated by a pressure medium derived directly from a pressure reservoir charged by a pump or compressor driven by the motor of the vehicle or another motor on the vehicle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
827.983. Regulating. MERRYWEATHER & SONS Ltd. Oct. 24, 1957 [Aug. 22, 1956(2)], Nos. 25656/56 and 25657/56. Class 7(6) [Also in Group XXIX] The output of a pump is varied automatically in accordance with the demand. A fire engine has a vehicle engine driven pump 1 supplying liquid through a line 5 to hydraulic motors for operating a ladder mounted on a turntable. A combined unloading and relief valve 4 is biased to its closed position in which it acts as a relief valve by pressure in a pilot line 3 which is connected to .the supply line 5. A foot operated valve 2 when not actuated opens line 3 to an exhaust line 13 and valve 4 then functions as an unloading valve, pump output passing via a line 10 and throttle 16 to a sump 11. Closing valve 2 causes valve 4 to close and function as a relief valve, the pressure in line 5 rising to a value determined by valve 4 and excess liquid passing via line 10 to exhaust. Pressure in line 10 acts on a piston 17 operating a power controlling member 19 of th engine through a lever 20 so that increasing pressure in line 10 results in a decrease of engine speed. To ensure that the engine will idle when the pump is unloaded, lever 20 is pivoted on a movable fulcrum 21 controlled by a piston 22 subject to the pressure in line 5. When the unloading valve is open piston 22 moves lever 20 to the retracted position in which the engine idles irrespective of the position of piston 17. The system can be adapted to operate with a constant speed prime mover employing a variable delivery pump, the pump capacity or the speed ratio of a variable speed gear being varied in accordance with the pressure in the line 10. The hydraulic motors (not shown) are connected to the supply line 5 and to a return line 6, a multi-way rotatable connection 7 allowing rotation of the turntable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2565656A GB827983A (en) | 1956-08-22 | 1956-08-22 | Improvements in or relating to hydraulic power transmission systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2565656A GB827983A (en) | 1956-08-22 | 1956-08-22 | Improvements in or relating to hydraulic power transmission systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB827983A true GB827983A (en) | 1960-02-10 |
Family
ID=10231209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2565656A Expired GB827983A (en) | 1956-08-22 | 1956-08-22 | Improvements in or relating to hydraulic power transmission systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB827983A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1193727B (en) * | 1960-08-12 | 1965-05-26 | Carl Metz G M B H | Device for regulating the fuel supply of an internal combustion engine driving a pump of a hydraulic system |
| DE1274402B (en) * | 1964-08-06 | 1968-08-01 | Grundstuecksverwaltungsgesells | Control device for a vehicle internal combustion engine for driving a fluid pump |
-
1956
- 1956-08-22 GB GB2565656A patent/GB827983A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1193727B (en) * | 1960-08-12 | 1965-05-26 | Carl Metz G M B H | Device for regulating the fuel supply of an internal combustion engine driving a pump of a hydraulic system |
| DE1274402B (en) * | 1964-08-06 | 1968-08-01 | Grundstuecksverwaltungsgesells | Control device for a vehicle internal combustion engine for driving a fluid pump |
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