EP0185436A2 - Fluid pressure operable unit - Google Patents
Fluid pressure operable unit Download PDFInfo
- Publication number
- EP0185436A2 EP0185436A2 EP85303855A EP85303855A EP0185436A2 EP 0185436 A2 EP0185436 A2 EP 0185436A2 EP 85303855 A EP85303855 A EP 85303855A EP 85303855 A EP85303855 A EP 85303855A EP 0185436 A2 EP0185436 A2 EP 0185436A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid pressure
- piston
- cylinder
- operable unit
- pressure operable
- 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.)
- Withdrawn
Links
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/18—Combined units comprising both motor and pump
Definitions
- This invention relates to a fluid pressure operable unit which is capable of being used, without any external source of fluid under pressure, for a variety of purposes.
- Mechanical components which are conventionally moved by means of mechanical mechanisms, such as lead screws, can be conveniently actuated by means of such a unit.
- a fluid pressure operable unit comprising a piston and cylinder unit, one of which has a connecting lug to a part of a mechanism and the other of which has a further lug for connection to a further part of the mechanism, between which parts relative movement is to be controlled, the cylinder having integral pumping means at one end thereof for generating fluid pressure in the cylinder to control movement of the piston relatively thereto.
- one end of the piston externally of the cylinder has a lug fixed thereto and the cylinder has a lug fixed to its external surface.
- the pumping means is preferably at the end of the cylinder remote from that from which the piston extends.
- the pumping means may have a plunger operable in the same direction as the direction of movement of the piston.
- the pumping means may include a linkage arranged to actuate the plunger and providing a mechanical advantage between a manual control member and the plunger.
- the unit shown is capable of use in several different mechanisms but has-been designed specifically for raising and lowering the chute on the back of a ready- mixed concrete vehicle.
- the chute is controlled by a screw and nut mechanism. No external source of fluid under pressure is required for operation of the unit shown since it is entirely self-contained.
- the unit as shown in Figures 1 and 2, comprises a cylinder containing a slideable piston.
- the cylinder is fabricated from inner and outer concentric tubular sleeves 9, 10 secured at one end to a hollow plug 11. Securement is by welding to form a liquid-tight joint.
- the plug 11 is stepped to provide shoulders on which the sleeves 9 and 10 engage respectively.
- a pump body 12 also having surfaces on which the ends of the sleeves 9, 10 engage.
- a circumferential wire ring 13 is used to secure the outer sleeve 10 onto the pump body 12.
- the pump body carries external circumferential seals 14, 15 engaging with the sleeves 9, 10 respectively to form liquid-tight seals at the ends of the sleeves. There-is no positive securement between the end of the unit sleeve 9 and the pump body 12 other than through the seal.
- a pair of apertured lugs 16 which can be connected to an external mechanism by means of a bolt or pin. Also situated on the external surface of the outer sleeve 10 is a filler tube 17 enclosing an entry hole 18 through the outer sleeve 10 and having at its outer end a filler plug 19 which may have a retention pin passing through it. This allows air to bleed in and out of the reservoir tube.
- a piston in the form of a cylindrical piston rod 21 having one end extending through the plug 11. That end of the piston rod carries a yoke 22 defining a pair of spaced aperture lugs. A pin 23 retains the yoke on the end of the piston rod 21.
- a fluid-tight seal assembly 24 is housed within the end of the hollow plug 11 and this engages with the piston rod 21 to provide a seal as the piston moves relatively to the cylinder.
- the space between the inner and outer sleeves 9, 10 forms a reservoir for hydraulic fluid which can be introduced through the filler tube 17. Fluid also fills the space between the inner sleeve 9 and the piston rod 21 and there is a closeable by-pass valve controlling flow of fluid from the inner to the outer space when required.
- This defice comprises a screwed valve member 25 having a knurled control knob 26 at its outer end.
- the valve member 25 occupies a short tube 27 fixed on the exterior of the hollow plug 11. This is internally screw threaded to engage with the valve member 25.
- the valve member can bear on a ball 28 which can close a port 31, connecting a passage 32 with a drilling 33 both in the plug 11.
- the passage 32 is formed longitudinally on the interior surface of the plug 11 and communicates with the end of - the plug directed towards the pump body 12.
- the drilling 33 is between the space within the plug 11 occupied by the ball 31 and the end of the valve member 25 and the space between inner and outer sleeves 9, 10.
- the pump body 12 has a stepped coaxial bore which at the end nearest to the piston rod 21 is occupied by a spring loaded ball 35.
- the spring 36 for this is retained in place by means of a transverse pin.
- the ball 35 is engaged against a seating formed by a step in the bore of the pump body.
- transverse bore in the pump body which contains a plug 38 serving as an abutment for a spring loaded ball 39.
- the spring 41 for this abuts against an end surface of the plug 38.
- the plug has an external circumferential seal engaging in the transverse bore which the plug occupies.
- the ball 39 engages on a seating formed by a step in the transverse bore. The two - ends of that transverse bore open into the space between inner and outer sleeves 9 and 10.
- the other end of the coaxial bore in the pump body 12 is occupied by a sliding pump piston 42 carrying a seal 43, providing a liquid-tight seal between the pump piston 42 and the cylinder formed by the appropriate portion of the bore of the pump body 12.
- the outer end of the pump piston 42 is pivotally connected to a member 43 which is a hollow sleeve with a slot in one side. The end of the pump piston 42 extends through such slot.
- a further lug 44 is secured to the end of the pump body 12 and to this is pivotally connected one end of a toggle 45.
- the other end of the toggle is pivotally connected to the member 43 at a position spaced at its pivotal connection with the pump piston 42.
- a pin 40 is provided in the member 43 near its upper end as shown and into this can be fitted a removable handle 46 which is of cranked shape as shown.
- the end of the handle which is made of tube is slotted to engage the pin 40.
- the device may be connected into a mechanism having parts which are to be relatively movable. One of the parts is secured to the lugs 16 and the other to the yoke 22.
- the device contains hydraulic fluid. Reciprocation of the pump piston 42 by actuation -of the handle 46 results in fluid being drawn from the reservoir, formed by the space between inner arid outer sleeves 9, 10 and delivered to the space between the piston rod 21 and the inner sleeve 9.
- the pump piston 42 is moved outwardly, that is to the right as shown in the drawing, fluid is drawn past the ball 39 and into the space vacated by the pump piston 42.
- the build up of pressure closes the ball 39 against its seating and instead opens the ball 35 thus allowing entry of the fluid into the space between the piston rod 21 and the inner tube 9. From the closed position as shown the pressure initially acts against the end of the piston rod 21 and it is against this surface that the force is applied to move the piston rod 21 to the left so as to increase the distance between the lugs 16 and the yoke 22.
- valve member 25 When the fluid pressure is to be released, the valve member 25 is unscrewed by means of its knurled knob 26 thus allowing the fluid to escape back into the outer space between the sleeves 9 and 10, thus allowing the piston rod 21 to move inwardly. Mechanical force is necessary to cause such movement. During such inward movement of the piston rod 21, the ball 35 is against its seating thus preventing fluid flowing through-that portion of the bore of the pump body 12.
- lugs 16 and the yoke 22 can be replaced by other attachment means whereby the device can be secured to parts of a mechanism to be controlled.
- the pump handle 46 may be detached when pumping action is not required and its shape and form may vary according to the operating position of the device in a mechanism.
- the pumping action provides a mechanical advantage between the manual operation of the handle 46 and the sliding movement of the pump piston 42.
- the pump body 12 may be fitted in various alternative positions, in order to allow operation of the handle 46 in certain alternative directions. In a position of use the handle operating plane may be above or below or to either side of the remainder of the unit, as convenient.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Fluid-Pressure Circuits (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Description
- This invention relates to a fluid pressure operable unit which is capable of being used, without any external source of fluid under pressure, for a variety of purposes.
- Mechanical components which are conventionally moved by means of mechanical mechanisms, such as lead screws, can be conveniently actuated by means of such a unit.
- It is the object of the invention to provide a fluid pressure operable unit which is convenient for use in association with a number of different types of mechanism.
- In accordance with the present invention, there is provided a fluid pressure operable unit comprising a piston and cylinder unit, one of which has a connecting lug to a part of a mechanism and the other of which has a further lug for connection to a further part of the mechanism, between which parts relative movement is to be controlled, the cylinder having integral pumping means at one end thereof for generating fluid pressure in the cylinder to control movement of the piston relatively thereto.
- Conveniently, one end of the piston externally of the cylinder has a lug fixed thereto and the cylinder has a lug fixed to its external surface. The pumping means is preferably at the end of the cylinder remote from that from which the piston extends. The pumping means may have a plunger operable in the same direction as the direction of movement of the piston. The pumping means may include a linkage arranged to actuate the plunger and providing a mechanical advantage between a manual control member and the plunger.
- The invention will now be described by way of example with reference to the accompanying drawings in which:
- Figure 1 is a cross sectional side elevation view of a fluid pressure operable unit constructed in accordance with the invention, and,:
- Figure 2 is a plan view of the unit.
- The unit shown is capable of use in several different mechanisms but has-been designed specifically for raising and lowering the chute on the back of a ready- mixed concrete vehicle. Conventionally, the chute is controlled by a screw and nut mechanism. No external source of fluid under pressure is required for operation of the unit shown since it is entirely self-contained.
- The unit, as shown in Figures 1 and 2, comprises a cylinder containing a slideable piston. The cylinder is fabricated from inner and outer concentric
tubular sleeves 9, 10 secured at one end to a hollow plug 11. Securement is by welding to form a liquid-tight joint. The plug 11 is stepped to provide shoulders on which thesleeves 9 and 10 engage respectively. - At the other end of the two
sleeves 9, 10 there is apump body 12 also having surfaces on which the ends of thesleeves 9, 10 engage. To secure theouter sleeve 10 onto thepump body 12, acircumferential wire ring 13 is used. The pump body carries externalcircumferential seals sleeves 9, 10 respectively to form liquid-tight seals at the ends of the sleeves. There-is no positive securement between the end of the unit sleeve 9 and thepump body 12 other than through the seal. - On the outside surface of the
outer sleeve 10 there is fixed a pair of aperturedlugs 16 which can be connected to an external mechanism by means of a bolt or pin. Also situated on the external surface of theouter sleeve 10 is a filler tube 17 enclosing an entry hole 18 through theouter sleeve 10 and having at its outer end afiller plug 19 which may have a retention pin passing through it. This allows air to bleed in and out of the reservoir tube. - Extending into the interior of the cylinder there is a piston in the form of a
cylindrical piston rod 21 having one end extending through the plug 11. That end of the piston rod carries ayoke 22 defining a pair of spaced aperture lugs. Apin 23 retains the yoke on the end of thepiston rod 21. A fluid-tight seal assembly 24 is housed within the end of the hollow plug 11 and this engages with thepiston rod 21 to provide a seal as the piston moves relatively to the cylinder. - The space between the inner and
outer sleeves 9, 10 forms a reservoir for hydraulic fluid which can be introduced through the filler tube 17. Fluid also fills the space between the inner sleeve 9 and thepiston rod 21 and there is a closeable by-pass valve controlling flow of fluid from the inner to the outer space when required. This defice comprises a screwedvalve member 25 having a knurledcontrol knob 26 at its outer end. Thevalve member 25 occupies ashort tube 27 fixed on the exterior of the hollow plug 11. This is internally screw threaded to engage with thevalve member 25. The valve member can bear on aball 28 which can close aport 31, connecting apassage 32 with adrilling 33 both in the plug 11. Thepassage 32 is formed longitudinally on the interior surface of the plug 11 and communicates with the end of - the plug directed towards thepump body 12. Thedrilling 33 is between the space within the plug 11 occupied by theball 31 and the end of thevalve member 25 and the space between inner andouter sleeves 9, 10. By screwing thevalve member 25 outwardly away from tight contact with theball 28, this is allowed to lift off the seating in theport 31 thus allowing communication between thepassage 32 and thedrilling 33. If the pressure in thepassage 32 exceeds the pressure in thedrilling 33, fluid will flow in that direction. However, tightening thevalve member 25 against the ball, 28 will prevent such flow. - At the end of the
piston rod 21 nearest to thepump body 12 there is acircumferential spring clip 34 which serves to limit travel of the piston rod through the plug 11. - The
pump body 12 has a stepped coaxial bore which at the end nearest to thepiston rod 21 is occupied by a spring loadedball 35. Thespring 36 for this is retained in place by means of a transverse pin. Theball 35 is engaged against a seating formed by a step in the bore of the pump body. - There is also a transverse bore in the pump body which contains a plug 38 serving as an abutment for a spring loaded
ball 39. Thespring 41 for this abuts against an end surface of the plug 38. The plug has an external circumferential seal engaging in the transverse bore which the plug occupies. Theball 39 engages on a seating formed by a step in the transverse bore. The two - ends of that transverse bore open into the space between inner andouter sleeves 9 and 10. - The other end of the coaxial bore in the
pump body 12 is occupied by asliding pump piston 42 carrying aseal 43, providing a liquid-tight seal between thepump piston 42 and the cylinder formed by the appropriate portion of the bore of thepump body 12. The outer end of thepump piston 42 is pivotally connected to amember 43 which is a hollow sleeve with a slot in one side. The end of thepump piston 42 extends through such slot. Afurther lug 44 is secured to the end of thepump body 12 and to this is pivotally connected one end of atoggle 45. The other end of the toggle is pivotally connected to themember 43 at a position spaced at its pivotal connection with thepump piston 42. - A
pin 40 is provided in themember 43 near its upper end as shown and into this can be fitted aremovable handle 46 which is of cranked shape as shown. The end of the handle which is made of tube is slotted to engage thepin 40. - In operation, the device may be connected into a mechanism having parts which are to be relatively movable. One of the parts is secured to the
lugs 16 and the other to theyoke 22. - The device contains hydraulic fluid. Reciprocation of the
pump piston 42 by actuation -of thehandle 46 results in fluid being drawn from the reservoir, formed by the space between inner aridouter sleeves 9, 10 and delivered to the space between thepiston rod 21 and the inner sleeve 9. When thepump piston 42 is moved outwardly, that is to the right as shown in the drawing, fluid is drawn past theball 39 and into the space vacated by thepump piston 42. Upon reversal of the movement of thepump piston 42, the build up of pressure closes theball 39 against its seating and instead opens theball 35 thus allowing entry of the fluid into the space between thepiston rod 21 and the inner tube 9. From the closed position as shown the pressure initially acts against the end of thepiston rod 21 and it is against this surface that the force is applied to move thepiston rod 21 to the left so as to increase the distance between thelugs 16 and theyoke 22. - When the fluid pressure is to be released, the
valve member 25 is unscrewed by means of itsknurled knob 26 thus allowing the fluid to escape back into the outer space between thesleeves 9 and 10, thus allowing thepiston rod 21 to move inwardly. Mechanical force is necessary to cause such movement. During such inward movement of thepiston rod 21, theball 35 is against its seating thus preventing fluid flowing through-that portion of the bore of thepump body 12. - It is to be understood that the
lugs 16 and theyoke 22 can be replaced by other attachment means whereby the device can be secured to parts of a mechanism to be controlled. - The pump handle 46 may be detached when pumping action is not required and its shape and form may vary according to the operating position of the device in a mechanism. The pumping action provides a mechanical advantage between the manual operation of the
handle 46 and the sliding movement of thepump piston 42. - The
pump body 12 may be fitted in various alternative positions, in order to allow operation of thehandle 46 in certain alternative directions. In a position of use the handle operating plane may be above or below or to either side of the remainder of the unit, as convenient.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08432024A GB2168757A (en) | 1984-12-19 | 1984-12-19 | Fluid pressure actuators |
GB8432024 | 1984-12-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0185436A2 true EP0185436A2 (en) | 1986-06-25 |
EP0185436A3 EP0185436A3 (en) | 1986-10-22 |
Family
ID=10571414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85303855A Withdrawn EP0185436A3 (en) | 1984-12-19 | 1985-05-31 | Fluid pressure operable unit |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0185436A3 (en) |
GB (1) | GB2168757A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1014253C2 (en) * | 2000-02-01 | 2001-08-02 | Holmatro Ind Equip | Manually-operated hydraulic tool with piston and actuator aligned on longitudinal axis |
WO2011102706A3 (en) * | 2010-02-22 | 2011-12-08 | Oyervides Ochoa, Luis Gerardo | Hydraulic wrench for controlled tightening with manual and autonomous actuation |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2265353A (en) * | 1992-03-26 | 1993-09-29 | Peter Ligertwood | Lifting unit for tv,videos,etc |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH177205A (en) * | 1933-11-28 | 1935-05-31 | Riedl Rudolf | Hands-free electric motor, in particular for kitchen and household purposes. |
CH296967A (en) * | 1951-08-10 | 1954-03-15 | Brandl Willi | Food processor. |
FR1101688A (en) * | 1953-07-31 | 1955-10-10 | Multipurpose device, electrically operated, for domestic applications | |
GB761429A (en) * | 1953-12-12 | 1956-11-14 | Fredon Pierre A G | Improvements in or relating to combination driving devices for driving various kindsof apparatus from a single motor |
DE2214742B2 (en) * | 1972-03-25 | 1974-05-30 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Hand mixer powered kitchen machine with rotating bowl |
SU927507A1 (en) * | 1980-04-02 | 1982-05-15 | Рижское Отделение Всесоюзного Государственного Ордена Ленина И Ордена Октябрьской Революции Проектного Института "Теплоэлектропроект" | Apparatus for preparing suspensions |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH412588A (en) * | 1961-01-23 | 1966-04-30 | Elmeg | Set of individual parts for the formation of electro-hydraulic actuators |
NL170393C (en) * | 1971-08-31 | 1982-11-01 | Applied Power Ind Inc | MOTOR VEHICLE WITH A TIPPING DEVICE FOR A FRONT TILT CAB. |
SE431159B (en) * | 1980-05-05 | 1984-01-23 | Hans Arne Valentin Johansson | LIFTING DEVICE FOR PATIENT LIFTING DEVICES |
IT1146568B (en) * | 1981-12-01 | 1986-11-12 | Gianpietro Zappa | HYDRAULIC ELEVATOR FOR CHAIRS AND ARMCHAIRS, ENTIRELY CONTAINED IN THE CENTRAL SEAT SUPPORT COLUMN |
DE3218001A1 (en) * | 1982-05-13 | 1983-11-17 | Elektro-Mechanik Gmbh, 5963 Wenden | ELECTROHYDRAULIC ADJUSTMENT |
-
1984
- 1984-12-19 GB GB08432024A patent/GB2168757A/en not_active Withdrawn
-
1985
- 1985-05-31 EP EP85303855A patent/EP0185436A3/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH177205A (en) * | 1933-11-28 | 1935-05-31 | Riedl Rudolf | Hands-free electric motor, in particular for kitchen and household purposes. |
CH296967A (en) * | 1951-08-10 | 1954-03-15 | Brandl Willi | Food processor. |
FR1101688A (en) * | 1953-07-31 | 1955-10-10 | Multipurpose device, electrically operated, for domestic applications | |
GB761429A (en) * | 1953-12-12 | 1956-11-14 | Fredon Pierre A G | Improvements in or relating to combination driving devices for driving various kindsof apparatus from a single motor |
DE2214742B2 (en) * | 1972-03-25 | 1974-05-30 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Hand mixer powered kitchen machine with rotating bowl |
SU927507A1 (en) * | 1980-04-02 | 1982-05-15 | Рижское Отделение Всесоюзного Государственного Ордена Ленина И Ордена Октябрьской Революции Проектного Института "Теплоэлектропроект" | Apparatus for preparing suspensions |
Non-Patent Citations (2)
Title |
---|
HYDRAULICS & PNEUMATICS, vol. 36, no. 5, May 1983, page 18, right-hand column, Cleveland, Ohio, US; "Integral pump extends cylinder" * |
SOVIET INVENTIONS ILLUSTRATED; SECTION P,Q, week 83/12, may 4, 1983, Derwent publications ltd., london P 64; & SU-A-927507 (RIGA TEPLO-ELEKTROPR) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1014253C2 (en) * | 2000-02-01 | 2001-08-02 | Holmatro Ind Equip | Manually-operated hydraulic tool with piston and actuator aligned on longitudinal axis |
WO2011102706A3 (en) * | 2010-02-22 | 2011-12-08 | Oyervides Ochoa, Luis Gerardo | Hydraulic wrench for controlled tightening with manual and autonomous actuation |
Also Published As
Publication number | Publication date |
---|---|
EP0185436A3 (en) | 1986-10-22 |
GB2168757A (en) | 1986-06-25 |
GB8432024D0 (en) | 1985-01-30 |
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Effective date: 19870623 |
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Inventor name: MAYER, HEINZ WALTER |