GB2136520A - Vacuum casing for a power brake booster - Google Patents
Vacuum casing for a power brake booster Download PDFInfo
- Publication number
- GB2136520A GB2136520A GB08403513A GB8403513A GB2136520A GB 2136520 A GB2136520 A GB 2136520A GB 08403513 A GB08403513 A GB 08403513A GB 8403513 A GB8403513 A GB 8403513A GB 2136520 A GB2136520 A GB 2136520A
- Authority
- GB
- United Kingdom
- Prior art keywords
- casing
- rims
- shells
- vacuum
- casing shells
- 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.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000011324 bead Substances 0.000 claims abstract description 8
- 238000007373 indentation Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
- B60T13/567—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of the casing or by its strengthening or mounting arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Braking Systems And Boosters (AREA)
Abstract
In a vacuum casing for a power brake booster, two casing shells (22, 23) are made of a comparatively thick-walled light sheet metal and are held together by a thin-walled ring (37) made of high-strength sheet steel which surrounds the casing shells (22, 23) in the region of a rolling diaphragm (7) which is clamped therebetween. The casing shells (22, 23) comprise outwardly bent rims (45, 49) while the peripheral surfaces (41, 42) of the rims (45, 49) are of similar diameter. The ring (37) is provided with inwardly extending flanges (43, 44) which overlap the rims (45, 49) and urge them against a circumferential bead (38) of the rolling diaphragm (7). The distances (a, b) between the plane of the peripheral surfaces (41, 42) of the rims and the outer surfaces (47, 48) of the casing shells (22, 23) are from one to one and a half times the thickness (c) of the casing shells (22, 23), and results in the effective diameter (f) being favourable compared to the installation dimension (g). The rims (45,49) may extend at angles ( alpha , beta ) which are preferably 60 DEG . In a second embodiment, Fig. 3 not shown, flange 43 is replaced by indentation (50) which engage rim (45). <IMAGE>
Description
SPECIFICATION
Vacuum casing for a power brake booster
The present invention relates to a vacuum casing for a power brake booster for automotive vehicles, composed of two sheet-metal casing shells sealingly interconnected at the casing periphery, with an axially movable wall sealingly subdividing the vacuum casing into a vacuum chamber and a working chamber and comprising a rigid diaphragm plate and a flexible diaphragm, which latter forms a rolling diaphragm between the outer circumference of the diaphragm plate and the vacuum casing, the rolling diaphragm's outer circumferential bead being clamped in at the junction of the two casing shells, the two casing shells being interconnected by a circumferential ring.
In like vacuum power brake boosters for automotive vehicles, the master brake cylinder is secured to one end wall of the vacuum casing, while the other end wall is fastened to the automotive vehicle, preferably to the bulkhead. The brake forces which are transmitted during braking onto the actuating piston of the master brake cylinder have to be retransmitted as reaction forces from the master cylinder onto the point at which power brake booster is fastened to the automotive vehicle.
Taking into consideration that these comparatively high tension forces are transmitted via the vacuum casing, the vacuum casing has so far been manufactured of sheet steel, which detracts from the aim of weight reduction of the power brake booster.
A considerable weight reduction by virtue of a thin-walled vacuum casing design can be acconiplished by providing that the tension forces are transmitted via separate tractive elements, for instance tie bolts (German printed and published patent application 28 45 794) or via a central reinforcing tube interconnecting the two end wails of the vaccuum casing (German printed and published patent application 28 37 911). In any case, the sealing of the axially movable wall at the point where these tractive eiements extend through necessitates additional structural efforts.
It has been shown that even when transmitting the reaction forces via the vacuum casing, i.e. without separate tractive elements, a light-weight vacuum casing design made of comparatively thick-walled sheets of light metal is possible, if the junction of the two casing shells is designed such that, based on the predetermined dimensions for the outer diameter of the power brake booster, the effective piston cross-section of the booster is not reduced by comparison with conventional designs made of high-strength steel sheet.
The present invention seeks to provide a vacuum casing made of light sheet metal in which the coupling of the two casing shells is simplified from the point of view of manufacture, in that the weight of the vacuum casing is reduced, and in that, despite a comparatively large wall thickness of the vacuum casing, the effective piston cross-section of the booster is not decreased by comparison with conventional aggregates comprising casing shells made of sheet steel.
According to the invention there is provided a vacuum casing for a power brake booster for automotive vehicles, having two sheetmetal casing shells sealingly interconnected at the casing periphery, with an axially movable wall sealingly subdividing the vacuum casing into a vacuum chamber and a working chamber and comprising a rigid diaphragm plate and a flexible diaphragm, which latter forms a rolling diaphragm between the outer circumference of the diaphragm plate and the vacuum casing, the rolling diaphragm's outer circumferential bead being clamped at the junction of the two casing shells, the two casing shells being interconnected by a circumferential ring, characterised in that the two rims of the casing shells are bent outwardly in a flange-like fashion in the region of their junction.The periphery of the rims have similar diameters, a circumferential bead of the rolling diaphragm is clamped between the two rims wherein the ring surrounds the casing shells and abuts with its cylindrical inner surface the periphery of the rims and has, at its circumferential edges, collars or indentations that extend radially inwardly and overlap the rims.
Preferably, the two rims of the casing shells are hook-like bent outwardly in the area of their junction, to confine angles in conjunction with the adjacent outer surfaces of the casing shells that form conical peripheral surfaces, the said angles being smaller than 90 , preferably 60 . To ensure complete sealing in the clamping region, the circumferential ring clamping the two rims of the casing shells is at one edge cranked inwardly at right angles, while it is provided with indentations at the other edge which engage one rim of the casing shell.
Since the weight of the circumferential ring, compared to all other parts of the power brake booster, in particular in comparison with voluminous casing shells, is of hardly any significance, it is advantageously made of highstrength material, for example steel, while the casing shells can be made of light metal e.g.
aluminium.
In a preferred embodiment, the radially outwardly, hook-like bent-off rims of the two casing shells comprise surfaces of section, whose distance from the cylindrical outer surfaces of the casing shells is from one to one and a half times the wall thickness of the casing shells.
In order that the invention and its various other preferred features may be understood more easily, two embodiments thereof will now be described, by way of example only, with reference to the drawings, in which: Figure 1 is a longitudinal cross-sectional view of a power brake booster constructed in accordance with the invention,
Figure 2 is a partial cross-section taken at the casing periphery of the power brake booster of Fig. 1 and
Figure 3 is a partial cross section taken at the casing periphery of an alternative embodiment of the junction of the two casing shells in longitudinal cross section.
The power brake booster shown in Fig. 1 comprises a vacuum casing 1 which is subdivided by an axially movable wall 2 into a working chamber 3 and a vacuum chamber 4.
The axially movable wall 2 comprises a sheetmetal deep-drawn diaphragm plate 5 and a flexible diaphragm 6 abutting thereon and forming a rolling diaphragm 7 as a seal between the outer periphery of the diaphragm plate 5 and the vacuum casing 1.
A control valve 9 actuatable by a piston rod 8 comprises a control valve piston 10 which is coupled to the piston rod 8 and which releases valve openings in a control valve housing 11 in a manner such as to provide communication between the working chamber 3 and the vacuum chamber 4, in the nonactuated position illustrated in Fig. 1, via air ducts 1 2 extending laterally in the control valve housing 11, which air ducts terminate at the periphery of the control valve housing 11. Upon actuation of the control valve 9, i.e.
upon an axial displacement of the piston rod 8, the connection between the vacuum chamber 4 to the working chamber 3 will be interrupted; the working chamber 3 will be connected to the atmosphere so that the movable wall 2 moves towards the vacuum chamber 4.
The braking force is transmitted onto an actuating piston of a (non-illustrated) master cylinder of the brake unit, via a rubber-elastic reaction plate 1 3 that is received in a frontal recess of the control valve housing 11 and via a push rod 14 comprising a flange head 15.
The master cylinder is secured to the vacuumside end of the power brake booster.
A compression spring 1 6 acts between one end wall 24 of the vacuum casing 1 and the diaphragm plate 5 and urges the movable wall 2 to the initial position shown.
The diaphragm plate 5 includes a bowlshaped hub member 17, from which a retaining flange 1 8 projects radially inwardly and abuts on a shoulder 1 9 of the control valve housing 11.
A retaining plate 20 made of sheet-metai is fixed to the diaphragm plate 5 by virtue of tabs 21 stamped out of the diaphragm plate 5, and abuts the end face of the control valve housing 11. In the event of the brake being actuated only mechanically upon failure of the vacuum, the retaining plate 20 will transmit an axial force from the control valve housing 11 onto the diaphragm plate 5 and will entrain it. Additionally, the retaining plate 20 prevents push rod 14 from dropping out during removal of the master cylinder; the inner rim of the retaining plate 20 secures the flange head 1 5 of the push rod 14 in its position in the recess of the control valve housing 11.
The vacuum casing 1 has two casing shells 22, 23 made of a comparatively thick-walled light sheet metal. A reinforcing plate 25 abuts on the inside end wall 24 of the casing shell 22 nearest to the master cylinder. At one casing edge 27, the end wall 24 of the casing shell 22 adjoins a cylindrical circumferential wall 28.
Similarly, a reinforcing plate 30 abuts the inside of the end wall 23.1 of the vacuum casing 1 which wall is close to the master cylinder.
The two casing shells 22, 23 are interconnected at the casing edge close to the working chamber. The cas;ng shell 23 forming the end wall 23.1 and the casing shell 22 encompassing the vacuum chamber 4 each comprise for this purpose, at their periphery, a rim 49, 45 which is bent outwardly relative to the cylindrical circumferential wall 28, which two rims are pressed by a ring 37 provided with inwardly extending edges 43, 44 against a circumferential bead 38 of the rolling diaphragm 7.
To attain an optimum sealing effect and highest mechanical strength, the two rims 45, 49 of the casing shells 22, 23 are hook-like bent outwardly in the area of their junctions, while the radially outwardly disposed narrow sides or surfaces of section 41, 42, which form the cylinder peripheral surfaces, confine angles a and , respectively, in conjunction with the adjacent outer surfaces 47, 48 of the casing shells 22, 23, which outer surfaces form conical peripheral surfaces, the said angles amounting to 60 . The circumferential ring 37, 46 is made of a thin-walled highstrength steel strip, while the casing shells 22, 23 consist of a comparatively thick-walled light sheet metal. Since the radially outwardly bent rims 45, 49 of the casing shells 22, 23 comprise surfaces of section 41, 42 whose distances a and b, respectively, in relation to the cylindrical outer surfaces 47, 48 of the casing shells 22, 23 are from one to one and a half times the wall thickness c of the casing shells 22, 23 the effective diameter f is designed comparatively large in comparison with the diameter g required for installation.
The casing shells 22 and 23 are preferably made of a light weight material e.g. aluminium whilst the ring 37 or 46 is preferably made of a high strength material e.g. steel.
Claims (6)
1. A vacuum casing for a power brake booster for automative vehicles, having two sheet-metal casing shells (22, 23) sealingly interconnected at the casing periphery, with an axially movable wall (2) sealingly subdividing the vacuum casing (1) into a vacuum chamber (4) and a working chamber (3) and comprising a rigid diaphragm plate (5) and a flexible diaphragm (6), which latter forms a rolling diaphragm (7) between the outer circumference of the diaphragm plate (5) and the vacuum casing (1), the rolling diaphragm's outer circumferential bead (38) being clamped at the junction of the two casing shells (22, 23), the two casing shells (22, 23) being interconnected by a circumferential ring (37, 46), characterised in that the two rims (45, 49) of the casing shells (22, 23) are bent outwardly in a flange-like fashion in the region of their junction.The periphery (41, 42) of the rims have similar diameters (d), a circumferential bead (38) of the rolling diaphragm (7) is clamped between the two rims (45, 49) wherein the ring (37, 46) surrounds the casing shells (22, 23) and abuts with its cylindrical inner surface the periphery (41, 42) of the rims (45, 49), and has, at is circumferential edges collars (43, 44) or indentations (50) that extend radially inwardly and overlap the rims (45, 49).
2. A vacuum casing as claimed in claim 1, characterised in that the two rims (45, 49) of the casing shells (22, 23) are hook-like bent outwardly in the area of their junction, to confine angles a and ss, respectively, in conjunction with the adjacent outer surfaces (47, 48) of the casing shells (22, 23) which form conical peripheral surfaces, the angles being smaller than 90 .
3. A vacuum casing as claimed in claim 2, characterised in that said angles are substantially 60 .
4. A vacuum casing as claimed in claim 1, 2 or 3, characterised in that the circumferential ring (46) clamping the two rims (45, 49) of the casing shells (22, 23) is at one edge (51) cranked inwardly at right angles, while at its other edge it is provided with indentations (50) which engage the rim (45) of the casing shell (22).
5. A vacuum casing as claimed in any one of the preceding claims, characterised in that the circumferential ring (37, 46) is made of high-strength material, while the casing shells (22, 23) consist of a light material.
6. A vacuum casing as claimed in claim 5, characterised in that the ring (37, 46) is made of steel.
6. A vacuum casing as claimed in claim 5, characterised in that the circumferential ring (37, 46) is made of steel.
7. A vacuum casing as claimed in claim 5 or 6, characterised in that the casing shells (22, 23) are made or aluminium.
8. A vacuum casing as claimed in any of the preceding claims, characterised in that rims (45, 49) of the two casing shells (22, 23) comprise peripheral surfaces (41, 42) whose distance (a and b, respectively) from the cylindrical outer surfaces (47, 48) of the casing shells (22, 23) is from one to one and a half times the wall thickness (c) of the casing shells (22, 23).
9. A vacuum casing for a power brake booster for automotive vehicles substantially as described herein with reference to the drawings.
1. A vacuum casing for a power brake booster for automotive vehicles, having two sheet-metal casing shells (22, 23) sealingly interconnected at the casing periphery, the two rims (45, 49) of which being bent outwardly in a flange-like fashion in the region of their junction and the two peripheries (41, 42) of which forming peripheral cylinder wall surfaces, wherein the flange-like bent rims (45, 49) clamp the circumferential bead (38) of a rolling diaphragm (7), and wherein a ring (37, 46) surrounding the flange-like bent rims (45, 49) of the casing shells (22, 23) includes, at its circumferential edges, circumferential projections (43, 44) or indentations (50) that extend radially inwardly and overlap the rims (45, 49), characterised in that the two peripheral surfaces (41, 42) have like diameters (d) and in that the ring (37, 46) clamping the flange-like bent rims (45, 49) abuts with its cylindrical inner surface on the periphery (41, 42) of the rims (45, 49), while the distance (a and b, respectively) of the peripheral surfaces (41, 42) from the cylindrical outer surfaces (47, 48) of the casing shells (22, 23) is from one to one and a half times the wall thickness (c) of the casing shells (22, 23).
4. A vacuum casing as claimed in claim 1, 2 or 3, characterised in that the ring (46) clamping the two rims (45, 49) of the casing shells (22, 23) is at one edge (51) cranked inwardly at right angles, while at its other edge it is provided with indentations (50) which engage the rim (45) of the casing shell (22).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833307880 DE3307880A1 (en) | 1983-03-05 | 1983-03-05 | VACUUM HOUSING FOR A BRAKE AMPLIFIER |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8403513D0 GB8403513D0 (en) | 1984-03-14 |
| GB2136520A true GB2136520A (en) | 1984-09-19 |
| GB2136520B GB2136520B (en) | 1987-09-09 |
Family
ID=6192647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08403513A Expired GB2136520B (en) | 1983-03-05 | 1984-02-10 | Vacuum casing for a power brake booster |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS59164251A (en) |
| DE (1) | DE3307880A1 (en) |
| ES (1) | ES277447Y (en) |
| FR (1) | FR2541957B1 (en) |
| GB (1) | GB2136520B (en) |
| IT (1) | IT1173423B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0434479A1 (en) * | 1989-12-22 | 1991-06-26 | Alliedsignal Europe Services Techniques | Outer protection device |
| EP2243674A1 (en) * | 2009-04-22 | 2010-10-27 | Robert Bosch GmbH | Servomotor and method for assembling same |
| CN107709821A (en) * | 2015-07-31 | 2018-02-16 | 伊格尔工业股份有限公司 | The manufacture method of diaphragm damper device and its holding member and diaphragm damper device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0433181Y2 (en) * | 1986-11-10 | 1992-08-10 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB628945A (en) * | 1943-10-20 | 1949-09-08 | Pesco Products Co | Improvements in or relating to power-operated booster apparatus for brakes, clutches and the like |
| GB1028994A (en) * | 1964-11-18 | 1966-05-11 | Girling Ltd | Improvements in fluid-pressure-operated boosters |
| GB1140611A (en) * | 1966-05-19 | 1969-01-22 | Girling Ltd | Improvements in and relating to tubular housing structures |
| GB1593079A (en) * | 1976-12-29 | 1981-07-15 | Tokico Ltd | Booster for vehicle braking system |
| GB2069080A (en) * | 1979-12-28 | 1981-08-19 | Toyota Motor Co Ltd | Brake boosters |
| GB2071241A (en) * | 1980-02-09 | 1981-09-16 | Toyota Motor Co Ltd | Differential pressure brake boosters |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3358449A (en) * | 1966-11-18 | 1967-12-19 | Midland Ross Corp | Position control power brake |
| JPS4948915B1 (en) * | 1969-08-04 | 1974-12-24 | ||
| US3628422A (en) * | 1969-08-04 | 1971-12-21 | Midland Ross Corp | Power brake reaction mechanism |
| JPS50119170A (en) * | 1974-03-08 | 1975-09-18 | ||
| DE7618489U1 (en) * | 1976-06-11 | 1978-01-05 | Kugelfischer Georg Schaefer & Co, 8720 Schweinfurt | BRAKING POWER AMPLIFIERS, ESPECIALLY FOR MOTOR VEHICLES |
| DE3246085A1 (en) * | 1982-12-13 | 1984-06-14 | Alfred Teves Gmbh, 6000 Frankfurt | VACUUM-POWERED BRAKE-AMPLIFIER |
-
1983
- 1983-03-05 DE DE19833307880 patent/DE3307880A1/en not_active Ceased
-
1984
- 1984-02-10 GB GB08403513A patent/GB2136520B/en not_active Expired
- 1984-02-10 ES ES1984277447U patent/ES277447Y/en not_active Expired
- 1984-02-28 JP JP59035446A patent/JPS59164251A/en active Pending
- 1984-03-02 IT IT19878/84A patent/IT1173423B/en active
- 1984-03-05 FR FR8403393A patent/FR2541957B1/en not_active Expired
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB628945A (en) * | 1943-10-20 | 1949-09-08 | Pesco Products Co | Improvements in or relating to power-operated booster apparatus for brakes, clutches and the like |
| GB1028994A (en) * | 1964-11-18 | 1966-05-11 | Girling Ltd | Improvements in fluid-pressure-operated boosters |
| GB1140611A (en) * | 1966-05-19 | 1969-01-22 | Girling Ltd | Improvements in and relating to tubular housing structures |
| GB1593079A (en) * | 1976-12-29 | 1981-07-15 | Tokico Ltd | Booster for vehicle braking system |
| GB2069080A (en) * | 1979-12-28 | 1981-08-19 | Toyota Motor Co Ltd | Brake boosters |
| GB2071241A (en) * | 1980-02-09 | 1981-09-16 | Toyota Motor Co Ltd | Differential pressure brake boosters |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0434479A1 (en) * | 1989-12-22 | 1991-06-26 | Alliedsignal Europe Services Techniques | Outer protection device |
| FR2656389A1 (en) * | 1989-12-22 | 1991-06-28 | Bendix Europ Services Tech | DEVICE FOR PERIPHERAL PROTECTION, IN PARTICULAR A BRAKE SERVOMOTOR FOR MOTOR VEHICLES. |
| US5094560A (en) * | 1989-12-22 | 1992-03-10 | Bendix Europe Services Techniques | Peripheral protection device |
| EP2243674A1 (en) * | 2009-04-22 | 2010-10-27 | Robert Bosch GmbH | Servomotor and method for assembling same |
| FR2944764A1 (en) * | 2009-04-22 | 2010-10-29 | Bosch Gmbh Robert | SERVOMOTOR AND METHOD FOR MOUNTING |
| CN107709821A (en) * | 2015-07-31 | 2018-02-16 | 伊格尔工业股份有限公司 | The manufacture method of diaphragm damper device and its holding member and diaphragm damper device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8403513D0 (en) | 1984-03-14 |
| FR2541957B1 (en) | 1987-04-24 |
| IT1173423B (en) | 1987-06-24 |
| GB2136520B (en) | 1987-09-09 |
| JPS59164251A (en) | 1984-09-17 |
| ES277447U (en) | 1984-07-16 |
| DE3307880A1 (en) | 1984-09-06 |
| IT8419878A0 (en) | 1984-03-02 |
| ES277447Y (en) | 1985-02-01 |
| FR2541957A1 (en) | 1984-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |