CA1255607A - Housing for a valve actuating push rod - Google Patents
Housing for a valve actuating push rodInfo
- Publication number
- CA1255607A CA1255607A CA000452379A CA452379A CA1255607A CA 1255607 A CA1255607 A CA 1255607A CA 000452379 A CA000452379 A CA 000452379A CA 452379 A CA452379 A CA 452379A CA 1255607 A CA1255607 A CA 1255607A
- Authority
- CA
- Canada
- Prior art keywords
- housing
- push rod
- groove
- protective tube
- aperture
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/34—Lateral camshaft position
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Multiple-Way Valves (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A housing is proposed for a valve actuating push rod with a protective tube enclosing the push rod, one end of the tube being adapted to be inserted into an aperture in the crankcase and the other end into an aperture in the cylinder head or rocker arm housing of an internal combustion engine, the tube being adapted to be sealed in the apertures by means of O-rings, each O-ring being arranged for the purpose of sealing one end of protective tube, in a space of substantially trapezoidal or rectangular cross-section formed by a groove, provided in protective tube, and a groove provided in the aperture in the crankcase or in the cylinder head or in the rocker arm housing, the grooves unit-ing to produce an O-ring groove of standard depth. Such arrangement allows the protective tube to be not only sealed but also locked axially in the space, thus eliminating the need for additional retaining elements.
A housing is proposed for a valve actuating push rod with a protective tube enclosing the push rod, one end of the tube being adapted to be inserted into an aperture in the crankcase and the other end into an aperture in the cylinder head or rocker arm housing of an internal combustion engine, the tube being adapted to be sealed in the apertures by means of O-rings, each O-ring being arranged for the purpose of sealing one end of protective tube, in a space of substantially trapezoidal or rectangular cross-section formed by a groove, provided in protective tube, and a groove provided in the aperture in the crankcase or in the cylinder head or in the rocker arm housing, the grooves unit-ing to produce an O-ring groove of standard depth. Such arrangement allows the protective tube to be not only sealed but also locked axially in the space, thus eliminating the need for additional retaining elements.
Description
~2S561~7 The present invention relates to a housing for a valve actuating push rod in an internal combustion engine, with a protective tube enclosing the push rod from the crankcase to the cylinder head, rocker arm housing, or the like, one end of said tube being adapted to be inserted into an aperture in the crankcase and the other end into an aperture in the cylinder head or rocker arm housing, the tube being adapted to be sealed in the apertures by means of 0-rings, each arranged in a groove, a machined channel or the like.
Valve mechanisms in internal combustion engines having underhead camshafts and, in particular, overhead valves, require, among other things, push rods. Since in the case of air-cooled engines, for example, the push rods pass through the cooling air space between the cylinder head or rocker arm housing and the cran]ccase, they must be sealed off air-tight, to prevent the cooling ribs from being contaminated with leakage oil. This is usually accomplished by means of a push rod housing-Various designs of push rod housings are disclosed in "Die Konstruction schnellaufender Verbrennungsmotoren"
(The Design of High-speed Internal-Combustion Engines), Hermann Mettig, Walter De Gryterverlag, Berlin, New York, 1973, Fig.
162 on page 244. The third example of embodiment is a push rod housing of this kind in which the protective tube joints in the cylinder head and crankcase are in the form of plug-in connections, sealed with toroidal or 0-rings. The crankcase end of the protective tube is formed by a stop element pro-vided with a machined groove for accommodating a standard 0-ring and bearing, in the assembled condition, externally upon the crankcase. This limits the ability of the protective tube to move axially, but an additional retaining element isneeded for safe retention of the protective tube, and this ~56(~7 element is screwed to the crankcase- Such design is expensive due to many parts being required, notwithstanding difficult assembly being involved, all of which is of considerable importance especially in the case of mass-produced internal combustion engines-It is therefore a main aim of the present inventionto provide a simplified valve actuating push rod housing o~ the type mentioned at the beginning hereof, from the point of view of the components used to ensure reliable sealing of the said housing, while retaining the plug-in joints between the pro-tective tube and the cylinder head or rocker arm housing and, at the same time, minimi~ing production costs and assembly-According to the present invention, this purposeis accomplished in that the O-ring at one end oE the pro-tective tube is arranged in a space formed by a groove pro-vided in the protective tube and a groove provided in the aperture in the crankcase or in the rocker arm housing, the grooves uniting to form an O-ring groove of standard depth.
These characteristics, according -to the present invention, offer substantial advantage in that they make it possible to dispense with the need for additional components for securing the protective tube axially, since such location is effected within the common space accommodating the one O-ring, whereby this space and O-ring perform a double func-tion and are thus important. The common space is essentially adapted to O-ring standards, i.e., depending upon the thick-ness of the O-ring to be used, the width of the groove may be taken from standard O-ring tables, whereas the overall ~l~SS~7 depth of the groove, which is also given in such tables, is divided between the two grooves forming the space accomm-odating the O-ring. This ensures that the housing is comp]etely sealed. Production costs are substantially reduced and assembly of the push rod housing is considerably simplified, since the only assembly work involved is the fitting of the O-rings and the insertion of the protective tube. The push rod housing according to the present invention provides the same advantages in both air-coo]ed and water-cooled internal combustion engines.
One o, the grooves of the common space preferably comprises a rounded-off inlet, or lead-in, the radius of which is between 0.5 and 1.0 of the diameter oE the O-ring to be used. The groove of the common O-ring accommodating space which has the rounded-off lead-in is preferably pro-vided in the aperture in -the crankcase or in the cylinder head or in the rocker arm housing. The groove in the protective tube preferabl~ comprises 80% of the entire space, and ~his provides additional advantages from a production point of view. According to one particularly favourable configuration of the protective tube plug-in connection designed with the common O-ring accommodating space, the diameter of the aperture is bet~een 1.6 and 2.05%
smaller than the maximal diameter of the groove provided in the aperture, while the maximal diameter of the end of the tube adapted to be inserted into this aperture is between 2 and 3% smaller than the corresponding diameter of the aperture in the crankcase, the cylinder head, or the rocker arm housing. This configuration, according to the inven-tion, of the pluy-in connection for the valve-actuating 56~7 push-rod housing has the advantage of making it possible to take optimal account of the dual function of the accommodat-ing space, namely sealing and axial location of the protective tube, while at the same time facilitating assembly.
Further advantageous configurations and develop-ments OL the invention appear in the disclosure hereinafter.
The invention is exp]ained hereinafter in greater detail, in conjunction with the examples of embodiment thereof illustra-ted in the drawings a~tached hereto, wherein:
YIGVRE 1 is a diagrammatical cross-sectional representation of an example of embodi-ment of a valve-actuating push rod hous-ing in accordance with the present invention;
FIGURE 2 is a further example of embodiment of a valve-ac-tua-ting push rod housing in accordance with the present invention;
and FIGURE 3 is a cross-sectional representation, to an enlarged scale, of detail III in Figure 2.
In Figures 1 to 3, parts having basically similar functions, bear the same reference numbers and in order to simplify matters, only parts needed for an understanding of the invention are shown in detail. In the Figures, 1 is a crankcase, 2 is a rocker arm housing, and 3 the camshaft, of an internal combustion engine. The valve designated 4 ls controlled by the camshaft 3 -through a rocker arm 5 and a 6~7 push rod 6. Push rod 6 runs from camshaft 3, through an aperture in the crankcase, an aperture in the rocker arm housing, and a space not shown in detail, to rocker arm S.
Between crankcase 1 and rocker arm housing 2, the said push rod is enclosed in a protective tube. The ends of the latter are adapted to be inserted in~o apertures 8 and 9 and are sealed by means toroidal or O-rings. According to the invention, O-ring 11 in crankcase aperture 8 is arranged in a space 12 formed jointly by a groove 13 provided in protec-tive tube 10 and a groove 14 provided in the crankcaseaperture 8. Although not specifically so illustrated in the drawings, a groove equivalent to the groove 14 can also be provided in either the cyli.nder head or the rocker arm hous-ing as above-discussed. Radii R and widths B of grooves 13,].4 are in accordance with standard O-ring tables, but dep-th T, which is also given in standard O-ring tables, is formed by the addition of depths T13 and T14 of grooves 13,14. Protective tube 10 is therefore not only sealed but is also secured axially by O-ring 11 arranged in crankcase aperture 8 in the common O-ring accommodating space. in addition to this axial location, a step 15 is provided to restrict axial movement into the interior of the crankcase.
A similar step may be provided in the cylinder head or rocker arm housing. O-ring 11, at the end of protective tube 10 which is adapted to be i.nserted into aperture 9 in the rocker arm housing, is arranged exclusively in a -trape-zoidal or rectangular groove 16 in the protective tube.
This groove 16 comprises standard O-rinq dimensions.
3L~5S~
In the example of embodiment according to Figure 2, aperture 8 in the crankcase, for insertion of protective tube lO, is in the form of a retaining element 17 adapted to be secured to the crankcase by means of bolts, for example. The said retaining element again comprises a step 15 restricting the movement of the protective tube in the one direction. Further-more, in this example of embodiment, the ends of protective tube lO, adapted to be inserted into apertures 8 and 9, have an expanded cross-section, which allows the protective tube to fit more closely to the push rod between the two ends of the tube.
Apart from thisg this example of embodiment is similar to that illustrated in Figure 1.
Figure 3 is a greatly enlarged representation of detail III in Figure 2, showing the common O-ring accommodating space, and clarifying the dimensions o~ the two grooves 13 and 14. Shown here is an O-ring in its assembled, i.e. deformed, condition, with its original diameter DR shown in broken line-If the diameter DR o the O-ring is known, width B, radii R
and overall groove-depth T of common space 12 may be obtained from standard O-ring tables- The overall groove depth T is the sum of depth T13 of groove 13 in protective tube lO and depth T14 in groove 14 running from aperture 8. Since overall groove depth T is designed to provide optimal sealing, ~hereas the joint must also be designed as an easily assembled plug-in - 5a -~Z5~6~7 connection, groove-depths T13 and T14, and thus diameter D14 of aperture 8 and outside diameter D13 of protective tube 10, adapted to be inserted into aperture 8, are optimized, according to the invention~ Diameter D14 of aperture 8 is 1.6 to 2.0%
smaller than diameter DT14 of groove 14, and maximal outside diameter D13 of the end of protective tube 10 to be inserted into aperture 8 is 2 to 3% smaller than diameter D14 of aperture 8. At the same time, this provides proportional groove depths T13 and T14 The radius of the rounded off inlet or lead-in to groove 14 is designed with a radius R14 of 0.5 to 1.0 of the diameter DR of O~ring 11.
Valve mechanisms in internal combustion engines having underhead camshafts and, in particular, overhead valves, require, among other things, push rods. Since in the case of air-cooled engines, for example, the push rods pass through the cooling air space between the cylinder head or rocker arm housing and the cran]ccase, they must be sealed off air-tight, to prevent the cooling ribs from being contaminated with leakage oil. This is usually accomplished by means of a push rod housing-Various designs of push rod housings are disclosed in "Die Konstruction schnellaufender Verbrennungsmotoren"
(The Design of High-speed Internal-Combustion Engines), Hermann Mettig, Walter De Gryterverlag, Berlin, New York, 1973, Fig.
162 on page 244. The third example of embodiment is a push rod housing of this kind in which the protective tube joints in the cylinder head and crankcase are in the form of plug-in connections, sealed with toroidal or 0-rings. The crankcase end of the protective tube is formed by a stop element pro-vided with a machined groove for accommodating a standard 0-ring and bearing, in the assembled condition, externally upon the crankcase. This limits the ability of the protective tube to move axially, but an additional retaining element isneeded for safe retention of the protective tube, and this ~56(~7 element is screwed to the crankcase- Such design is expensive due to many parts being required, notwithstanding difficult assembly being involved, all of which is of considerable importance especially in the case of mass-produced internal combustion engines-It is therefore a main aim of the present inventionto provide a simplified valve actuating push rod housing o~ the type mentioned at the beginning hereof, from the point of view of the components used to ensure reliable sealing of the said housing, while retaining the plug-in joints between the pro-tective tube and the cylinder head or rocker arm housing and, at the same time, minimi~ing production costs and assembly-According to the present invention, this purposeis accomplished in that the O-ring at one end oE the pro-tective tube is arranged in a space formed by a groove pro-vided in the protective tube and a groove provided in the aperture in the crankcase or in the rocker arm housing, the grooves uniting to form an O-ring groove of standard depth.
These characteristics, according -to the present invention, offer substantial advantage in that they make it possible to dispense with the need for additional components for securing the protective tube axially, since such location is effected within the common space accommodating the one O-ring, whereby this space and O-ring perform a double func-tion and are thus important. The common space is essentially adapted to O-ring standards, i.e., depending upon the thick-ness of the O-ring to be used, the width of the groove may be taken from standard O-ring tables, whereas the overall ~l~SS~7 depth of the groove, which is also given in such tables, is divided between the two grooves forming the space accomm-odating the O-ring. This ensures that the housing is comp]etely sealed. Production costs are substantially reduced and assembly of the push rod housing is considerably simplified, since the only assembly work involved is the fitting of the O-rings and the insertion of the protective tube. The push rod housing according to the present invention provides the same advantages in both air-coo]ed and water-cooled internal combustion engines.
One o, the grooves of the common space preferably comprises a rounded-off inlet, or lead-in, the radius of which is between 0.5 and 1.0 of the diameter oE the O-ring to be used. The groove of the common O-ring accommodating space which has the rounded-off lead-in is preferably pro-vided in the aperture in -the crankcase or in the cylinder head or in the rocker arm housing. The groove in the protective tube preferabl~ comprises 80% of the entire space, and ~his provides additional advantages from a production point of view. According to one particularly favourable configuration of the protective tube plug-in connection designed with the common O-ring accommodating space, the diameter of the aperture is bet~een 1.6 and 2.05%
smaller than the maximal diameter of the groove provided in the aperture, while the maximal diameter of the end of the tube adapted to be inserted into this aperture is between 2 and 3% smaller than the corresponding diameter of the aperture in the crankcase, the cylinder head, or the rocker arm housing. This configuration, according to the inven-tion, of the pluy-in connection for the valve-actuating 56~7 push-rod housing has the advantage of making it possible to take optimal account of the dual function of the accommodat-ing space, namely sealing and axial location of the protective tube, while at the same time facilitating assembly.
Further advantageous configurations and develop-ments OL the invention appear in the disclosure hereinafter.
The invention is exp]ained hereinafter in greater detail, in conjunction with the examples of embodiment thereof illustra-ted in the drawings a~tached hereto, wherein:
YIGVRE 1 is a diagrammatical cross-sectional representation of an example of embodi-ment of a valve-actuating push rod hous-ing in accordance with the present invention;
FIGURE 2 is a further example of embodiment of a valve-ac-tua-ting push rod housing in accordance with the present invention;
and FIGURE 3 is a cross-sectional representation, to an enlarged scale, of detail III in Figure 2.
In Figures 1 to 3, parts having basically similar functions, bear the same reference numbers and in order to simplify matters, only parts needed for an understanding of the invention are shown in detail. In the Figures, 1 is a crankcase, 2 is a rocker arm housing, and 3 the camshaft, of an internal combustion engine. The valve designated 4 ls controlled by the camshaft 3 -through a rocker arm 5 and a 6~7 push rod 6. Push rod 6 runs from camshaft 3, through an aperture in the crankcase, an aperture in the rocker arm housing, and a space not shown in detail, to rocker arm S.
Between crankcase 1 and rocker arm housing 2, the said push rod is enclosed in a protective tube. The ends of the latter are adapted to be inserted in~o apertures 8 and 9 and are sealed by means toroidal or O-rings. According to the invention, O-ring 11 in crankcase aperture 8 is arranged in a space 12 formed jointly by a groove 13 provided in protec-tive tube 10 and a groove 14 provided in the crankcaseaperture 8. Although not specifically so illustrated in the drawings, a groove equivalent to the groove 14 can also be provided in either the cyli.nder head or the rocker arm hous-ing as above-discussed. Radii R and widths B of grooves 13,].4 are in accordance with standard O-ring tables, but dep-th T, which is also given in standard O-ring tables, is formed by the addition of depths T13 and T14 of grooves 13,14. Protective tube 10 is therefore not only sealed but is also secured axially by O-ring 11 arranged in crankcase aperture 8 in the common O-ring accommodating space. in addition to this axial location, a step 15 is provided to restrict axial movement into the interior of the crankcase.
A similar step may be provided in the cylinder head or rocker arm housing. O-ring 11, at the end of protective tube 10 which is adapted to be i.nserted into aperture 9 in the rocker arm housing, is arranged exclusively in a -trape-zoidal or rectangular groove 16 in the protective tube.
This groove 16 comprises standard O-rinq dimensions.
3L~5S~
In the example of embodiment according to Figure 2, aperture 8 in the crankcase, for insertion of protective tube lO, is in the form of a retaining element 17 adapted to be secured to the crankcase by means of bolts, for example. The said retaining element again comprises a step 15 restricting the movement of the protective tube in the one direction. Further-more, in this example of embodiment, the ends of protective tube lO, adapted to be inserted into apertures 8 and 9, have an expanded cross-section, which allows the protective tube to fit more closely to the push rod between the two ends of the tube.
Apart from thisg this example of embodiment is similar to that illustrated in Figure 1.
Figure 3 is a greatly enlarged representation of detail III in Figure 2, showing the common O-ring accommodating space, and clarifying the dimensions o~ the two grooves 13 and 14. Shown here is an O-ring in its assembled, i.e. deformed, condition, with its original diameter DR shown in broken line-If the diameter DR o the O-ring is known, width B, radii R
and overall groove-depth T of common space 12 may be obtained from standard O-ring tables- The overall groove depth T is the sum of depth T13 of groove 13 in protective tube lO and depth T14 in groove 14 running from aperture 8. Since overall groove depth T is designed to provide optimal sealing, ~hereas the joint must also be designed as an easily assembled plug-in - 5a -~Z5~6~7 connection, groove-depths T13 and T14, and thus diameter D14 of aperture 8 and outside diameter D13 of protective tube 10, adapted to be inserted into aperture 8, are optimized, according to the invention~ Diameter D14 of aperture 8 is 1.6 to 2.0%
smaller than diameter DT14 of groove 14, and maximal outside diameter D13 of the end of protective tube 10 to be inserted into aperture 8 is 2 to 3% smaller than diameter D14 of aperture 8. At the same time, this provides proportional groove depths T13 and T14 The radius of the rounded off inlet or lead-in to groove 14 is designed with a radius R14 of 0.5 to 1.0 of the diameter DR of O~ring 11.
Claims (12)
1. A housing for a valve actuating push rod in an internal combustion engine, with a protective tube enclosing the push rod from the crankcase to the rocker arm housing, one end of the tube being adapted to be inserted into an aperture in the crankcase, and the other end into an aperture in the rocker arm housing, and the tube being adapted to be sealed in the apertures by means of O-rings, each arranged in a channel, characterized in that said O-ring at one end of the protective tube is arranged in a common space formed by a groove provided in the protective tube and a groove provided in the aperture, in the crankcase or in the rocker arm housing, said grooves uniting to form an O-ring groove of standard depth.
2. A housing for a valve actuating push rod according to claim 1, characterized in that one of the grooves of the common space has a rounded off lead-in (R14).
3. A housing for a valve actuating push rod according to claim 2, characterized in that the groove, provided with the rounded off lead-in (R14), is provided in the aperture in the crankcase or the rocker arm housing, while the groove in the protective tube forms more than 80% of said space.
4. A housing for a valve actuating push rod according to claim 1, characterized in that the diameter (D14) of the aperture provided for the common space is between 1.6 and 2.05% smaller than the maximal diameter of the groove (DT14) running from it, and in that the maximal outside diameter (D13) of the end, adapted to be inserted into said aperture of the protective tube is between 2 and 3% smaller than the diameter (D14) of said aperture of said crankcase or said rocker arm housing.
5. A housing for a valve actuating push rod according to one of claims 2 to 4, characterized in that the rounded-off lead-in (R14) of the one groove of the common space has a radius of between 0.5 and 1.0 of the diameter (DR) of the O-ring to be accommodated.
6. A housing for a valve actuating push rod according to claim 1, characterized in that the O-ring at the other end of the protective tube is provided exclusively in the trapezoidal or rectangular groove in said protective tube.
7. A housing for a valve actuating push rod according to claim 1, characterized in that the protective tube has an expanded cross-section at the ends thereof which are adapted to be inserted into the apertures in the crankcase or the rocker arm housing.
8. A housing for a valve actuating push rod according to claim 1, characterized in that a step, to limit the axial movement of the protective tube is provided within the apertures in the crankcase or the rocker arm housing.
9. A housing for a valve actuating push rod according to claim 1, characterized in that the common space for the O-ring, formed by the two grooves is provided at the crank-case end.
10. A housing for a valve actuating push rod according to claim 1, characterized in that the aperture in the crank-case for insertion of the protective tube is formed by a retaining element arranged on the crankcase.
11. A housing as defined in claim 1 wherein the cross-sectional shape of said groove is substantially trapezoidal.
12. A housing as defined in claim 1 wherein the cross-sectional shape of said groove is substantially rectangular.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3314721.3 | 1983-04-22 | ||
| DE19833314721 DE3314721A1 (en) | 1983-04-22 | 1983-04-22 | HOUSING FOR A VALVE ACTUATOR BUMPER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1255607A true CA1255607A (en) | 1989-06-13 |
Family
ID=6197144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000452379A Expired CA1255607A (en) | 1983-04-22 | 1984-04-19 | Housing for a valve actuating push rod |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0123063B1 (en) |
| AT (1) | ATE25127T1 (en) |
| CA (1) | CA1255607A (en) |
| DE (2) | DE3314721A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5347967A (en) * | 1993-06-25 | 1994-09-20 | Mcculloch Corporation | Four-stroke internal combustion engine |
| US6655335B2 (en) | 2001-07-06 | 2003-12-02 | Shindaiwa Kogyo Co., Ltd | Small engine for power tools |
| US6766784B2 (en) | 2001-08-10 | 2004-07-27 | Shindaiwa Kogyo Co., Ltd. | Four-cycle engine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4142811C2 (en) * | 1990-12-26 | 1999-07-22 | Ryobi Ltd | Lubrication device of a 4-stroke internal combustion engine unit |
| US6883485B2 (en) * | 2001-12-07 | 2005-04-26 | Honda Giken Kogyo Kabushiki Kaisha | OHV and gear mechanism for engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE915166C (en) * | 1943-08-03 | 1954-07-15 | Perrot Regnerbau G M B H | Connection piece between thin-walled pipe and threaded fittings |
| US2432592A (en) * | 1943-10-25 | 1947-12-16 | Weatherhead Co | Tubular connection |
| US2657679A (en) * | 1951-09-08 | 1953-11-03 | Continental Motors Corp | Push rod housing structure |
| DE1895895U (en) * | 1961-09-30 | 1964-07-02 | Porsche Kg | VALVE CONTROL FOR COMBUSTION MACHINERY. |
| US4066281A (en) * | 1976-07-16 | 1978-01-03 | Bonis John C De | Porsche automobile oil drain replacement tube |
| SE444358B (en) * | 1981-04-23 | 1986-04-07 | Finnveden Dev Ltd Ab | SET FOR SEALING THE CUT BETWEEN TWO SEAL SURFACES AND SEALING DEVICE FOR IMPLEMENTATION OF THE SET |
-
1983
- 1983-04-22 DE DE19833314721 patent/DE3314721A1/en not_active Withdrawn
-
1984
- 1984-02-29 AT AT84102086T patent/ATE25127T1/en not_active IP Right Cessation
- 1984-02-29 DE DE8484102086T patent/DE3462170D1/en not_active Expired
- 1984-02-29 EP EP84102086A patent/EP0123063B1/en not_active Expired
- 1984-04-19 CA CA000452379A patent/CA1255607A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5347967A (en) * | 1993-06-25 | 1994-09-20 | Mcculloch Corporation | Four-stroke internal combustion engine |
| US5579735A (en) * | 1993-06-25 | 1996-12-03 | Mcculloch Corporation | Four-stroke internal combustion engine |
| US6655335B2 (en) | 2001-07-06 | 2003-12-02 | Shindaiwa Kogyo Co., Ltd | Small engine for power tools |
| US6766784B2 (en) | 2001-08-10 | 2004-07-27 | Shindaiwa Kogyo Co., Ltd. | Four-cycle engine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0123063A3 (en) | 1985-09-25 |
| EP0123063B1 (en) | 1987-01-21 |
| ATE25127T1 (en) | 1987-02-15 |
| DE3462170D1 (en) | 1987-02-26 |
| DE3314721A1 (en) | 1984-10-25 |
| EP0123063A2 (en) | 1984-10-31 |
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