GB2528262A - Supply apparatus for supplying spring seat and valve stem seal - Google Patents

Supply apparatus for supplying spring seat and valve stem seal Download PDF

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Publication number
GB2528262A
GB2528262A GB1412506.6A GB201412506A GB2528262A GB 2528262 A GB2528262 A GB 2528262A GB 201412506 A GB201412506 A GB 201412506A GB 2528262 A GB2528262 A GB 2528262A
Authority
GB
United Kingdom
Prior art keywords
valve stem
spring seat
stem seal
main body
suction
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
Application number
GB1412506.6A
Other versions
GB2528262B (en
GB201412506D0 (en
Inventor
David Tunks
Maurice Farnhill
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to GB1412506.6A priority Critical patent/GB2528262B/en
Publication of GB201412506D0 publication Critical patent/GB201412506D0/en
Publication of GB2528262A publication Critical patent/GB2528262A/en
Application granted granted Critical
Publication of GB2528262B publication Critical patent/GB2528262B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • B23P19/042—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts specially adapted for combustion engines
    • B23P19/045—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts specially adapted for combustion engines for assembling valve cotters and retainers of engine valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B25B11/005—Vacuum work holders
    • B25B11/007—Vacuum work holders portable, e.g. handheld
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0028—Tools for removing or installing seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/24—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same mounting or demounting valves
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

The supply apparatus (40, Figure 2) is for supplying a spring seat 14 and a valve stem seal 16, which is placed on the spring seat, to a valve guide 12 of an engine cylinder head 10. The apparatus holds the spring seat and the valve stem seal and includes a hollow cylindrical main body (42, Figure 3) with an annular suction surface 50 for attracting the spring seat under suction. The main body 42 also has a storage recess 52 defined therein, radially inwardly of the suction surface, for storing the valve stem seal. The annular suction surface has suction holes 50a defined therein. The suction holes are machined in the main body and are formed integrally with the main body. The storage recess may include an upper storage region (52a, Figure 4) divided from a lower storage 52b region by a step.

Description

SUPPLY APPARATUS FOR SUPPLYING SPRING SEAT
AND VALVE STEM SEAL
BACKGROUND OF THE INVENTION
Field of the Invention:
The present invention relates to a supply apparatus for supplying a spring seat and a valve stem seal, which is placed on the spring seat, to a valve guide of a cylinder head by holding the spring seat and the valve stem seal, and attaching the spring seat and the valve stem seal to the valve guide of the cylinder head.
Description of the Related Art:
Heretofore, as disclosed in UK Patent No. GB 2489973 B, suction heads for valve spring seats and for valve stem seals comprise two components, i.e., a main shaft and a shroud.
SUMMARY OF THE INVENTION
However, the conventional two components, which provide an appearance of the suction heads, make it difficult to reduce the size of the supply apparatus.
Further, if the tip ends of the suction heads are brought into contact with a cylinder head due to an error, then the shroud tends to become deformed.
It is an object of the present invention to provide a supply apparatus for supplying a spring seat and a valve stem seal, which is reduced in size and is less likely to become deformed by coming into contact with a cylinder head or the like.
The present invention is characterized by a supply apparatus for supplying a spring seat and a valve stem seal, which is placed on the spring seat, to a valve guide of a cylinder head by holding the spring seat and the valve stem seal, the supply apparatus including a hollow cylindrical main body having on one end thereof an annular suction surface for attracting the spring seat under suction, wherein the hollow cylindrical main body has a storage recess, which is defined radially inwardly of the suction surface, for storing the valve stem seal, the annular suction surface has a plurality of suction holes defined therein, and the suction holes are machined in the main body and are formed integrally with the main body.
In the above apparatus, the valve stem seal has an upper portion and a lower portion, which is greater in diameter than the upper portion, the storage recess includes an upper storage region for storing the upper portion of the valve stem seal, and a lower storage region joined to a distal end of the upper storage region for storing the lower portion of the valve stem seal, a central axis of an opening provided by the upper storage region is aligned with a central axis of an opening provided by the lower storage region, and the upper storage region is divided from the lower storage region by a step, and has an opening area smaller than that of the lower storage region, and when the spring seat is attracted by the suction surface, the upper portion of the valve stem seal is kept out of contact with a bottom surface of the storage recess.
According to the present invention, since the main body has the appearance of an integral structure from a distal end to a proximal end thereof, the main body can be reduced in size and has increased mechanical strength.
Consequently, even if the main body is brought into contact with the cylinder head due to an error, the main body is prevented from becoming unduly deformed. As a result, the spring seat and the valve stern seal can reliably be installed on the valve guide.
The above and other objects, features, and advantages of the present invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, in which a preferred embodiment of the present invention is shown by way of illustrative
example.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross-sectional view showing a manner in which a valve guide of the cylinder head of an engine is supplied with a spring seat and a valve stem seal; FIG. 2 is a block diagrarn of a supply apparatus for supplying the spring seat and the valve stem seal according to an embodiment of the present invention; FIG. 3 is a perspective view of a main body shown in FIG, 2; FIG. 4 is a cross-sectional view of the main body shown in FIG. 3; FIG. 5 is a cross-sectional view showing a manner in which the valve stem seal is placed on the spring seat, and the main body is lowered onto the valve stem seal and the spring seat; FIG. 6 is a cross-sectional view showing a manner in which the main body is lowered until a suction surface thereof abuts against the spring seat and the main body attracts the spring seat under suction; FIG. 7 is a cross-sectional view showing a manner in which the spring seat, which is fitted over the valve guide, is released from suction and drops from the suction surface of the main body; and FIG. 8 is a cross-sectional view showing a manner in which the valve stem seal is mounted on the valve guide using the main body.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A supply apparatus for supplying a spring seat and a valve stem seal according to a preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
FIG. 1 shows in cross section a manner in which a valve guide 12 of a cylinder head 10 of an engine is supplied and fitted with a spring seat 14 and a valve stem seal 16. As shown in FIG. 1, the valve guide 12 is in the form of a hollow cylinder, which is mounted on the cylinder head 10 of the engine. The valve guide 12 has an upper end portion that projects from the cylinder head 10. A valve stem 18 is inserted in and received by the valve guide 12.
The valve stem 18 includes a non-illustrated xralve on a lower portion thereof.
The spring seat 14 is of an annular shape surrounding the outer circumferential surface of the valve guide 12.
The spring seat 14 serves as a seat that provides a seating surf ace for a valve spring 20, which normally biases the valve stem 18 to move in a direction to close the valve.
The spring seat 14 is disposed on an upper surface of the cylinder head 10 and has an upper surface held in abutment against the lower end of the valve spring 20. The spring seat 14 includes a flat doughnut-shaped seat flange 22, which is held against the cylinder head 10, and a tubular member 24, which projects upwardly and inwardly from an inner edge of the seat flange 22. The tubular member 24 has an annular step 24a for supporting the lower end of the valve stem seal 16.
The valve stem seal 16, which is of a tubular shape, is mounted on a distal upper end of the valve guide 12. The valve stem seal 16 includes an upper portion l6a and a lower portion 16b, which is greater in diameter than the upper portion lEa. The valve stem seal 16 includes a cap-shaped stiffener sleeve 26 and a rubber seal 28. The stiffener sleeve 26, which is made of metal, includes a tubular member 26a having an inside diameter, which is greater than the outside diameter of the distal upper end of the valve guide 12, and a shoulder 2Gb that extends in a radial inward direction from an upper distal end of the tubular member 26a toward the central axis of the tubular member 26a. The shoulder 2Gb comprises a flat doughnut-shaped member, which lies perpendicular to the central axis of the tubular member 26a.
The rubber seal 28, which is of a tubular shape, has a seal base 28a, which is held against the inner circumferential surface of the stiffener sleeve 26, and a seal lip 28b, which extends upwardly from an upper distal end of the seal base 28a. The seal base 28a is press-fitted over and held in contact with an outer circumferential surface of the valve guide 12, and the seal lip 28b is held in contact with the valve stem 18. The valve stem 18 extends through the seal lip 28b of the valve stem seal 16 that is mounted on the valve guide 12, An annular helical spring 30 is mounted on an outer circumferential surface of the seal lip 28b, thereby keeping the seal lip 2Gb in intimate contact with the valve stem 18. The seal lip 28b and the annular helical spring 30 jointly make up the upper portion l6a of the valve stem seal 16, whereas the stiffener sleeve 26 and the seal base 28a jointly make up the lower portion 1Gb of the valve stem seal 16.
FIG. 2 shows in block form a supply apparatus 40 for supplying a spring seat and a valve stem seal (hereinafter referred to as a "supply apparatus 40") according to an embodiment of the present invention. The supply apparatus serves as an apparatus for holding the spring seat 14 and the valve stem seal 16, which is placed on the spring seat 14, and supplying the spring seat 14 and the valve stem seal 16 to the valve guide 12 of the cylinder head 10.
The supply apparatus 40 includes a main body (suction head) 42, an evacuating device 44 such as a vacuum pump or the like for depressurizing the inside of the main body 42, a moving device 46 such as a robot arm or the like for vertically and horizontally moving the main body 42, and a control device 48 for controlling the evacuating device 44 and the moving device 46. The supply apparatus 40 may be equipped with a plurality of main bodies 42.
FIG. 3 shows the main body 42 in perspective, and FIG. 4 shows the main body 42 of FIG. 3 in cross section. The main body 42 is a tool for attracting the spring seat 14 under suction, and for holding and attaching the spring seat 14 and the valve stem seal 16, which is placed on the spring seat 14, to the valve guide 12.
The main body 42 includes an annular suction surface £ £0 on a distal end thereof for attracting the spring seat 14 under suction. The suction surface 50 has a plurality of suction holes 50a defined therein. The main body 42 has a storage recess 52, which is defined radially inwardly of the suction surface 50, for storing at least the valve stem seal 16.
The main body 42 includes a first body 56 in the form of a hollow cylinder with a through hole 54 defined therein that extends axially from the distal end to a proximal end of the main body 42, and a second body 58 disposed in the through hole 54 proximate the distal end of the main body 42, which serves to close the through hole 54. Since the main body 42 is made up of the first body 56 with the through hole 54 defined therein, and the second body 58 disposed in the through hole 54, the main body 42 can be manufactured easily at a relatively low cost.
The first body 56 includes a holder 60 for holding the spring seat 14 and the valve stem seal 16 under suction, i.e., under a vacuum, and an evacuator 62 for evacuating the holder 60. The evacuator 62 is in the form of a hollow cylinder, which has a smaller outside diameter than the holder 60. The holder 60 also is in the form of a hollow cylinder. The evacuator 62 is formed integrally together with the holder 60. The through hole 54, which is defined in the first body 56, includes a first hole 54a having a smallest diameter, a second hole 54b joined to the first hole 54a and having a largest diameter, a third hole 54c joined to the second hole 54b and having a diameter smaller than the second hole 54b, and a fourth hole 54d joined to the third hole 54c and having a diameter greater than the third hole 54c. The diameter of the fourth hole 54d increases progressively toward the distal end of the main body 42.
The first hole 54a axially extends completely through the evacuator 62 and into the holder 60. The second hole 54b, the third hole 54c, and the fourth hole 54d are defined in the holder 60. The second body 58 is threaded into the third hole 54c, and thus is mounted in the first body 56. More specifically, the second body 58 has a hexagonal recess 64 defined therein for receiving a tip of a hexagonal wrench. After the second body 58 has been inserted from the distal end of the first body 56 into the through hole 54, the tip of the hexagonal wrench is fitted in the hexagonal recess 64, and then rotated in order to place the second body 58 in threaded engagement with the first body 56. The second body 58 is mounted on a proximal end portion of the third hole 54c.
The suction holes SOa, which are defined in the suction surface 50, are held in fluid communication with the second hole 54b through an outer wall of the holder 60 of the first body 56. Upon evacuation of the first hole 54a, which is defined in a proximal end portion of the main body 42, the second hole 54b, which is joined to the first hole 54a, also is evacuated, thereby reducing the pressure inside the suction holes 50a. The first hole 54a and the second hole 54b function as an evacuation channel for evacuating the suction holes 50a. Therefore, upon evacuation of the suction holes 50a while the suction surface 50 is held in contact with the spring seat 14, the suction surface 50 attracts the spring seat 14 under suction. Since the second body 58 is disposed in the third hole 54c, the third hole 54c and the fourth hole 54d are not evacuated, even though the first hole 54a is evacuated.
The suction holes 50a are machined in the main body 42 (i.e., the first body 56) and hence are formed integrally therewith.
The storage recess 52 that stores the valve stem seal 16 is made up of the recess 64, which is defined in the second body 58, the third hole 54c, and the fourth hole 54d.
The recess 64 functions as an upper storage region 52a for storing the upper portion lGa of the valve stem seal 16.
The fourth hole 54d and a portion of the third hole 54c, which is closer to the distal end of the main body 42 than the second body 58, are positioned more closely to the distal end of the main body 42 than the upper storage region 52a, and are joined to the upper storage region 52a.
The fourth hole 54d and the portion of the third hole 54c function as a lower storage region 52b for storing the lower portion 1Gb of the valve stem seal 16. The central axis of an opening provided by the upper storage region 52a is aligned with the central axis of an opening provided by the lower storage region 52b. The upper storage region 52a is divided from the lower storage region 52b by a step, and has an opening area that is smaller than the lower storage region 52b. The step is formed on a lower end 58a of the F second body 58. In other words, the hexagonal upper storage region 52a (the recess 64) is circumscribed by a circle, the diameter of which is smaller than the diameter of the third hole 54c. H A process of installing the spring seat 14 and the valve stem seal 16 on the valve guide 12 using the main body 42 will be described below with reference to FIGS. S through 8. First, as shown in FIG. 5, the valve stem seal 16 is placed on the spring seat 14. At this time, the lower end of the valve stem seal 16 is supported on the step 24a of the spring seat 14.
The control device 48 actuates the moving device 46 to lower the main body 42 in an axial direction with the distal end thereof oriented downwardly from above the spring seat 14, and the valve stem seal 16 oriented toward the spring seat 14 and the valve stem seal 16. As shown in FIG. 6, the main body 42 is lowered until the suction surface 50 abuts against the seat flange 22 of the spring seat 14. Thereafter, the control device 48 actuates the evacuating device 44, so as to evacuate the evacuating channel (the first hole 54a and the second hole 54b) in the main body 42, thereby attracting the seat flange 22 of the spring seat 14 to the suction surface 50 under suction. At this time, the tubular member 24 of the spring seat 14 and the valve stem seal 16 are stored in the storage recess 52 in the main body 42. More specifically, the upper portion lEa of the valve stem seal 16 is stored in the upper storage region 52a provided by the recess 64, whereas the lower portion 16b of the valve stem seal 16 and the tubular member 24 of the spring seat 14 are stored in the lower storage region 52b. Further, when the spring seat 14 is F -10 -attracted under suction to the suction surface 50, the upper portion lGa of the valve stem seal 16 is kept out of contact with a bottom surface 64a of the storage recess 52 (i.e., the recess 64).
Next, while the suction surface 50 attracts the spring seat 14 under suction, the control device 48 actuates the moving device 46 in order to move the main body 42 to a position above the valve guide 12 of the cylinder head 10, and then to lower the main body 42 toward the valve guide 12. when the main body 42 is lowered, the spring seat 14 and the lower end of the valve stem seal 16 become fitted over the valve guide 12. After the spring seat 14 and the lower end of the valve stem seal 16 have been fitted over the valve guide 12, the control device 48 inactivates the evacuating device 44 to release the spring seat 14 from the suction surface 50. Thus, as shown in FIG. 7, the spring seat 14 drops by gravity onto the cylinder head 10. As a result, the spring seat 14 is mounted on the upper surface of the cylinder head 10 in surrounding relation to the valve guide 12.
Upon further descent of the main body 42, as shown in FIG. 8, the lower end 58a of the second body 58 pushes the shoulder 2Gb of the stiffener sleeve 26 downwardly, until the lower portion 16b of the valve stem seal 16 is fitted completely over the valve guide 12. consequently, the valve stem seal 16 is mounted on the upper end portion of the valve guide 12. At this time, since the lower end 58a of the second body 58 pushes the shoulder 26b of the stiffener sleeve 26 downwardly, the seal base 28a of the rubber seal 28 can easily be fitted over the valve guide 12 when the -11 -seal base 28a is press-fitted over and held in contact with the outer circumferential surface of the valve guide 12.
Thereafter, the control device 48 actuates the moving device 46 in order to lift the main body 42 away from the spring seat 14 and the valve stem seal 16 on the valve guide 12, As described above, since the first body 56, which provides the appearance of the main body 42, is an integral structure from the distal end to the proximal end thereof, the main body 42 can be reduced in size and has increased mechanical strength. Consequently, even if the main body 42 is brought into contact with the cylinder head 10 due to an error, the main body 42 is prevented from becoming unduly deformed. As a result, the spring seat 14 and the valve stem seal 16 can reliably be installed on the valve guide 12.
-12 -

Claims (3)

  1. CLAIMS1. A supply apparatus for supplying a spring seat and a valve stem seal, which is placed on the spring seat, to a valve guide of a cylinder head by holding the spring seat and the valve stem seal, the supply apparatus comprising: a hollow cylindrical main body having on one end thereof an annular suction surface for attracting the spring seat under suction; wherein: the hollow cylindrical main body has a storage recess, which is defined therein radially inwardly of the suction surface, for storing the valve stem seal; the annular suction surface has a plurality of suction holes defined therein; and the suction holes are machined in the main body and are formed integrally with the main body.
  2. 2. The supply apparatus according to claim 1, wherein: the valve stem seal has an upper portion and a lower portion, which is greater in diameter than the upper portion; the storage recess includes an upper storage region f or storing the upper portion of the valve stem seal, and a lower storage region joined to a distal end of the upper storage region for storing the lower portion of the valve stem seal; a central axis of an opening provided by the upper storage region is aligned with a central axis of an opening provided by the lower storage region, and the upper storage -13 -region is divided from the lower storage region by a step, and has an opening area smaller than that of the lower storage region; and when the spring seat is attracted by the suction S surface, the upper portion of the valve stem seal is kept out of contact with a bottom surface of the storage recess.
  3. 3. supply apparatus for supplying a spring seat and a valve stem seal, substantially as hereinbefore described with reference to the accompanying drawings.-14 -
GB1412506.6A 2014-07-14 2014-07-14 Supply apparatus for supplying spring seat and valve stem seal Expired - Fee Related GB2528262B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1412506.6A GB2528262B (en) 2014-07-14 2014-07-14 Supply apparatus for supplying spring seat and valve stem seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1412506.6A GB2528262B (en) 2014-07-14 2014-07-14 Supply apparatus for supplying spring seat and valve stem seal

Publications (3)

Publication Number Publication Date
GB201412506D0 GB201412506D0 (en) 2014-08-27
GB2528262A true GB2528262A (en) 2016-01-20
GB2528262B GB2528262B (en) 2016-09-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB1412506.6A Expired - Fee Related GB2528262B (en) 2014-07-14 2014-07-14 Supply apparatus for supplying spring seat and valve stem seal

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106392596A (en) * 2016-10-28 2017-02-15 江阴市天润机械制造有限公司 Spring lower base applicable to various springs

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002822A1 (en) * 1989-02-02 1990-08-09 Kuka Schweissanlagen & Roboter Automatic mounting of split valves - is carried out by operation of swinging levers and coaxial tappet and sleeve
DE10230241A1 (en) * 2002-07-04 2004-01-22 Johann A. Krause Maschinenfabrik Gmbh Machine insertion process for valve keys involves use of assembly head and positioning device
EP1574281A2 (en) * 2004-03-12 2005-09-14 Johann A. Krause Maschinenfabrik GmbH Method and device for automatically assembling valve drive parts
JP2012091252A (en) * 2010-10-26 2012-05-17 Honda Motor Co Ltd Device and method of mounting retainer cotter for valve stem

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002822A1 (en) * 1989-02-02 1990-08-09 Kuka Schweissanlagen & Roboter Automatic mounting of split valves - is carried out by operation of swinging levers and coaxial tappet and sleeve
DE10230241A1 (en) * 2002-07-04 2004-01-22 Johann A. Krause Maschinenfabrik Gmbh Machine insertion process for valve keys involves use of assembly head and positioning device
EP1574281A2 (en) * 2004-03-12 2005-09-14 Johann A. Krause Maschinenfabrik GmbH Method and device for automatically assembling valve drive parts
JP2012091252A (en) * 2010-10-26 2012-05-17 Honda Motor Co Ltd Device and method of mounting retainer cotter for valve stem

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106392596A (en) * 2016-10-28 2017-02-15 江阴市天润机械制造有限公司 Spring lower base applicable to various springs
CN106392596B (en) * 2016-10-28 2018-09-28 江阴市天润机械制造有限公司 A kind of spring lower seat can be suitably used for a variety of springs

Also Published As

Publication number Publication date
GB2528262B (en) 2016-09-21
GB201412506D0 (en) 2014-08-27

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Effective date: 20191223

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20210714