US3909903A - Pliers for internal combustion engine piston packing-ring - Google Patents

Pliers for internal combustion engine piston packing-ring Download PDF

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Publication number
US3909903A
US3909903A US511577A US51157774A US3909903A US 3909903 A US3909903 A US 3909903A US 511577 A US511577 A US 511577A US 51157774 A US51157774 A US 51157774A US 3909903 A US3909903 A US 3909903A
Authority
US
United States
Prior art keywords
ring
packing
pliers
jaws
spreading
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 - Lifetime
Application number
US511577A
Other languages
English (en)
Inventor
Jean-Claude Bouquet
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.)
MAN Energy Solutions France SAS
Original Assignee
Semt
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 Semt filed Critical Semt
Application granted granted Critical
Publication of US3909903A publication Critical patent/US3909903A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/12—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same mounting or demounting piston rings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/536—Piston ring inserter or remover
    • Y10T29/53604—Plier-type operation
    • Y10T29/53609—Plier-type operation with ring encirclement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53613—Spring applier or remover
    • Y10T29/5363—Circular spring

Definitions

  • ABSTRACT Pliers for installation of packing-rings into the grooves Forelgn Appllcatlon Priority Data of pistons oflarge diameter, comprising a circular ar- Nov. 7, 1973 France 73.39571 cuate portion for accommodating the packing-ring therein, a pair of jaws for spreading apart the packing- [52] US. Cl. 29/224; 29/229 ring ends and a toggle system connected to at least [51] Int. C1.
  • the invention relates essentially to pliers for piston packing-rings of a heat engine generally such as an internal combustion engine, enabling the installation of the packing-rings into the corresponding grooves of pistons having a relatively large diameter.
  • Such pliers already known in the prior art, comprise a substantially circular arcuate portion or arch-like section inside of which the packing-ring to be mounted is placed, a pair of jaws for spreading apart the ring ends and a toggle system, linked arms or pivotally interconnected or knuckle-jointed levers arrangement for operating the spreading apart jaws, which is connected on the one hand to at least one of the handles or handgrips of the pliers and on the other hand to said spreading jaws.
  • the packing-ring was positioned inside of an arcuate portion or arch-like section and caused to bear with its portion substantially oppoiste to its free ends against a resilient abutment or like stop means integral with the arcuate portion.
  • the spreading jaws actuated by means of said handles were in engagement with both free ends of the packing-ring and spread them apart from each other so as to increase the inside diameter of this ring.
  • the toggle system was adapted to lock both jaws in their positions of maximum spacing or spreading apart of the ring ends. It was then merely necessary to slip the pliers and the ring over and about the piston head and to move the assembly into registering relationship with the corresponding piston groove so as to be able to fit the ring easily into the groove by causing both jaws to move towards each other by means of said hand-grips.
  • the present invention provides piston packing-ring pliers adapted in particular to fit the packing-rings into the grooves of a piston of large diameter, said pliers being of the kind comprising a substantially circular arcuate portion or arch-like section inside of which the packing-ring is accommodated, a pair of jaws for spreading the ring ends apart from each other and a toggle system or like linked arms or pivotally interconnected levers arrangement connected to at least one of the handgrips of the pliers and to said spreading jaws, said pliers being characterized by means for continuously backing approximately the half-circumference of the ring on the side substantially opposite to the ends of said ring in the spread or expanded condition thereof.
  • the whole halfcircumference forming the back side of the ring opposite to the open ends of this ring is therefore gradually caused to bear against or engage in substantially continuous relationship said backing or abutment means when the ring ends are spread apart or moved away from each other.
  • said spreading jaws are guided during their displacement along paths of travel which are substantially radial with respect to the substantially circular apparent contour or outline of the ring.
  • these backing or abutment means are constituted by said arcuate portion which comprises a semicircular ring segment the inner side of which has substantially the same diameter as the radially outer peripheral surface of said packing-ring, this section of the arcuate portion being substantially opposite to said spreading jaws.
  • the back side of the packing-ring which is opposite to the open ends of the packing-ring is accordingly gradually caused to be backed along a halfcircumference of the arcuate portion proper forming the pliers.
  • excessive bending stresses may therefore not occur at any given point of the packing-ring thereby removing the possibility of initiations of failure or breaking experienced in the prior art.
  • the installation of the packing-rings within the piston grooves according to the invention therefore results in a longer life of the packing-rings. and in particular avoids accidental failures or ruptures of these packing-rings a short time after their having been mounted.
  • FIG. 1 is a top view of pliers according to the invention showing the packing-ring fitted inside of the pliers in the nonexpanded condition;
  • FIG. 2 is a view similar to FIG. 1 but showing the packing-ring expanded by the jaws of the pliers.
  • the pliers used for installing the packing-rings of pistons of relatively large diameters consist essentially of an arcuate metal portion 1 both ends 2 and 3 of which are mounted in spreadapart condition onto at least one holder or like supporting plate 4.
  • the ends 2 and 3 of the arch-like portion 1 are secured to the plate 4 each one by means of a pair of suitable fastening members 5 so that the supporting plate 4 and the arcuate portion 1 form together a rigid non-deformable assembly.
  • a second supporting plate not shown is provided to cover the first supporting plate and the ends 2 and 3 of the arcuate portion which are accordingly positioned between both supporting plates.
  • a stationary handle or like grip 6 is also secured to the supporting plate 4 for instance on the side opposite to the end 2 of the arcuate portion whereas a second handle 7 forming a movable actuating hand-grip is fixedly mounted onto the end of a lever 8 the other end of which is pivotally connected at a point 9 to the supporting plate 4 near the attachment of the first handle
  • a flat bar or link 10 is pivotally connected with one ofits ends to an intermediate point of the lever 8 and is rigidly connected at its other end to a pin, bolt or other suitable element 11 which is slidably guided lengthwise within a slot 12 fonned in at least one of said supporting plates, this slot 12 extending along the longitudinal centre line 13 of the pliers.
  • a pair of flat bars or links 14 and 15 which are pivotally connected with their opposite ends to a pair of arms or rods 16 and 17, respectively, carrying the spreading jaws l8 and 19.
  • These arms 16 and 17 are pivotally connected with their ends to points 20 and 21, respectively, of the supporting plate 4.
  • a piston packing-ring with a substantially circular contour and split or divided to define a pair of free ends is positioned inside of the arcuate portion 1 so that these free ends are positioned on either side of the spreading jaws 18 and 19, respectively.
  • the packing-ring 25 the ends of which have thus been spread apart or moved away from each other may then be fitted into the corresponding groove of a piston.
  • the arcuate portion 1 advantageously comprises a substantially semi-circular part forming a backing or bearing abutment for the corresponding outer portion of the packing-ring 25 when the ends of the latter are spread apart or moved away from each other by the jaws 18 and 19.
  • This semicircular part 30 forms that part of the arcuate portion 1 which is substantially opposite to the spreading jaws 18 and 19 and which is extended by two side members 32 and 33 secured to the supporting plate 4.
  • Both of these side members 32 and 33 define an inner contour which is larger than the corresponding apparent outer contour'of the packing-ring 25 so that when the ends of this packing-ring are spread apart by the jaws 18 and 19 the space defined between the side members 32 and 33 on the one hand and the corresponding end portions of the packing ring 25 on the other hand is sufficient to allow the deformation of the packing-ring to take place upon the spreading apart of its ends by said jaws.
  • the links 14 and 15 move during the spreadirig motion of the jaws 18 and 19 beyond an unstable equilibrium position in which they are substantially aligned in registering relationship. Accordingly the angle defined by the links 14 and 15 is inverted or reversed in the final positions of the links with respect to the angle they define in the starting position shown in FIG. 1.
  • the spreading jaws 18 and 19 are thus locked in the spread apart position and may not return by themselves to their closely spaced positions.
  • the arcuate portion 1 may be provided with an additional stationary handle 35 which is generally substantially opposite to the stationary hand-grip 6 so as to facilitate the grasping of the pliers.
  • Piston packing-ring pliers having handles for installing packing-rings into the grooves of pistons of large diameters, of the kind comprising a substantially circular arcuate portion inside of which said packingring is placed, a pair of jaws for spreading apart packing-ring ends and a toggle system connected to at least one of the handles of said pliers and to said spreading jaws, respectively, wherein the improvement consists in the provision of bearing abutment means for continuously backing approximately the half-circumference of said packing-ring on the side substantially opposite to the ends of said packing-ring in the spread apart positions thereof, and means for guiding said spreading jaws during their displacements along paths of travel extending substantially radially with respect to the substantially circular apparent contour of said packingring.
  • said backing means are constituted by said arcuate portion which comprises a semicircular ring segment the inner side of which has substantially the same diameter as the radially outer peripheral surface of said packing ring, that segment of said arcuate portion being substantially opposite to said spreading jaws.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
US511577A 1973-11-07 1974-10-03 Pliers for internal combustion engine piston packing-ring Expired - Lifetime US3909903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7339571A FR2249746B1 (enrdf_load_stackoverflow) 1973-11-07 1973-11-07

Publications (1)

Publication Number Publication Date
US3909903A true US3909903A (en) 1975-10-07

Family

ID=9127414

Family Applications (1)

Application Number Title Priority Date Filing Date
US511577A Expired - Lifetime US3909903A (en) 1973-11-07 1974-10-03 Pliers for internal combustion engine piston packing-ring

Country Status (12)

Country Link
US (1) US3909903A (enrdf_load_stackoverflow)
JP (1) JPS5074900A (enrdf_load_stackoverflow)
BR (1) BR7409294D0 (enrdf_load_stackoverflow)
CH (1) CH587104A5 (enrdf_load_stackoverflow)
CS (1) CS177038B2 (enrdf_load_stackoverflow)
DD (1) DD116782A5 (enrdf_load_stackoverflow)
ES (1) ES430143A1 (enrdf_load_stackoverflow)
FR (1) FR2249746B1 (enrdf_load_stackoverflow)
GB (1) GB1453335A (enrdf_load_stackoverflow)
IT (1) IT1024136B (enrdf_load_stackoverflow)
NL (1) NL7414507A (enrdf_load_stackoverflow)
PL (1) PL96401B1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156959A (en) * 1974-12-21 1979-06-05 Weisenburger A Expander device
CN104117968A (zh) * 2013-04-24 2014-10-29 成都科盛石油科技有限公司 组装便捷的旋塞阀固定机构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1079564A (en) * 1912-11-08 1913-11-25 Joseph Komancsek Tool for removing or inserting piston packing-rings or the like.
US1983965A (en) * 1933-04-29 1934-12-11 Zim Mfg Company Holder and expander for piston rings

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1079564A (en) * 1912-11-08 1913-11-25 Joseph Komancsek Tool for removing or inserting piston packing-rings or the like.
US1983965A (en) * 1933-04-29 1934-12-11 Zim Mfg Company Holder and expander for piston rings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156959A (en) * 1974-12-21 1979-06-05 Weisenburger A Expander device
CN104117968A (zh) * 2013-04-24 2014-10-29 成都科盛石油科技有限公司 组装便捷的旋塞阀固定机构

Also Published As

Publication number Publication date
CH587104A5 (enrdf_load_stackoverflow) 1977-04-29
BR7409294D0 (pt) 1975-09-02
JPS5074900A (enrdf_load_stackoverflow) 1975-06-19
FR2249746B1 (enrdf_load_stackoverflow) 1976-10-01
FR2249746A1 (enrdf_load_stackoverflow) 1975-05-30
GB1453335A (en) 1976-10-20
NL7414507A (nl) 1975-05-12
DD116782A5 (enrdf_load_stackoverflow) 1975-12-12
IT1024136B (it) 1978-06-20
CS177038B2 (enrdf_load_stackoverflow) 1977-07-29
DE2449183B2 (de) 1976-05-26
AU7417674A (en) 1976-04-15
ES430143A1 (es) 1976-10-16
PL96401B1 (pl) 1977-12-31
DE2449183A1 (de) 1975-05-15

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