FR2343616A2 - Optimisation of tyre carcass and sub-tread ply cord angles - expressed in trigonometric terms with limits - Google Patents

Optimisation of tyre carcass and sub-tread ply cord angles - expressed in trigonometric terms with limits

Info

Publication number
FR2343616A2
FR2343616A2 FR7607055A FR7607055A FR2343616A2 FR 2343616 A2 FR2343616 A2 FR 2343616A2 FR 7607055 A FR7607055 A FR 7607055A FR 7607055 A FR7607055 A FR 7607055A FR 2343616 A2 FR2343616 A2 FR 2343616A2
Authority
FR
France
Prior art keywords
gamma
beta
alpha
angles
sign
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
FR7607055A
Other languages
French (fr)
Other versions
FR2343616B2 (en
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.)
Compagnie Generale des Etablissements Michelin SCA
Original Assignee
Compagnie Generale des Etablissements Michelin SCA
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 Compagnie Generale des Etablissements Michelin SCA filed Critical Compagnie Generale des Etablissements Michelin SCA
Priority to FR7607055A priority Critical patent/FR2343616A2/en
Publication of FR2343616A2 publication Critical patent/FR2343616A2/en
Priority to US06/050,309 priority patent/US4286645A/en
Application granted granted Critical
Publication of FR2343616B2 publication Critical patent/FR2343616B2/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/28—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers characterised by the belt or breaker dimensions or curvature relative to carcass

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

Parent patent describes tyre carcass construction with optimisation of relative cord axis angles for a combination of radial carcass plies and three superimposed layers of sub-tread bandages. The carcass plies are restricted to angles of 70-90 degrees to the circumferential axis in the sidewall regions and to smaller angles in the sub-tread zone. The cord axes of the three superimposed angles were designated alpha, beta and gamma respectively, with alpha for the layer adjacent to the carcass. The parent patent quoted a geometrical method for determining the optimum value for alpha as a function of beta and gamma, with tolerances on the preferred angle of plus or minus 30 degrees. This addition redefines the same technical criteria for alpha in the trigonometric terms. If beta > gamma and Beta and gamma are of opposite sign, then the limits are defined by (I). If gamma >beta and beta and gamma are of opposite sign, then symbols beta and gamma are interchanged in (I). If beta and gamma are of similar sign, then the first negative in the numerator and the negative in the denominator of (I) become positive. The optimum values for alpha and given in (II), (where epsilon = +1 or -1 if beta is of positive or negative sign respectively w.r.t. the circumferential vector). Beta and gamma are interchanged in (ii) and the sign for epsilon matches that for gamma. The -ve. Epsilon = +1 if beta and gamma are -ve.
FR7607055A 1973-06-12 1976-03-11 Optimisation of tyre carcass and sub-tread ply cord angles - expressed in trigonometric terms with limits Granted FR2343616A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7607055A FR2343616A2 (en) 1976-03-11 1976-03-11 Optimisation of tyre carcass and sub-tread ply cord angles - expressed in trigonometric terms with limits
US06/050,309 US4286645A (en) 1973-06-12 1979-06-20 Pneumatic tire with reinforced carcass and tread

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7607055A FR2343616A2 (en) 1976-03-11 1976-03-11 Optimisation of tyre carcass and sub-tread ply cord angles - expressed in trigonometric terms with limits

Publications (2)

Publication Number Publication Date
FR2343616A2 true FR2343616A2 (en) 1977-10-07
FR2343616B2 FR2343616B2 (en) 1979-08-31

Family

ID=9170302

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7607055A Granted FR2343616A2 (en) 1973-06-12 1976-03-11 Optimisation of tyre carcass and sub-tread ply cord angles - expressed in trigonometric terms with limits

Country Status (1)

Country Link
FR (1) FR2343616A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2421742A1 (en) * 1978-04-07 1979-11-02 Michelin & Cie RADIAL CASING PNEUMATIC
EP0605177A1 (en) * 1992-12-24 1994-07-06 Bridgestone Corporation Pneumatic tire
US5529105A (en) * 1992-12-24 1996-06-25 Bridgestone Corporation Pneumatic tire including at least one tie-element layer with substantially orthogonally oriented cords

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1605639A1 (en) * 1967-11-30 1970-01-29 Continental Gummi Werke Ag Pneumatic vehicle tires
DE1921750A1 (en) * 1969-04-29 1970-11-12 Continental Gummi Werke Ag Pneumatic vehicle tires

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1605639A1 (en) * 1967-11-30 1970-01-29 Continental Gummi Werke Ag Pneumatic vehicle tires
DE1921750A1 (en) * 1969-04-29 1970-11-12 Continental Gummi Werke Ag Pneumatic vehicle tires

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2421742A1 (en) * 1978-04-07 1979-11-02 Michelin & Cie RADIAL CASING PNEUMATIC
EP0605177A1 (en) * 1992-12-24 1994-07-06 Bridgestone Corporation Pneumatic tire
US5529105A (en) * 1992-12-24 1996-06-25 Bridgestone Corporation Pneumatic tire including at least one tie-element layer with substantially orthogonally oriented cords

Also Published As

Publication number Publication date
FR2343616B2 (en) 1979-08-31

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