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US3762056A
Expired / Lapsed
US
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Apparatus for measuring the thickness of a buffed tire casing
Assignee: Goodyear Tire and Rubber Co
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Filing: 1971-07-21
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Granted: 1973-10-02
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Expires: 1991-07-21
Abstract
Abstract An apparatus for measuring the thickness of a buffed tire casing to determine if a sufficient amount of rubber has been removed from the casing and the casing is suitable for retreading. The apparatus has a mandrel on which the buffed casing is mounted and supported while the measurement is made. A tensioning device moves the casing into compressive engagement with the mandrel where the thickness of the casing can be more accurately measured. A plurality of adjustable fingers, calibrated in relation to the mandrel and sufficient in number to simultaneously measure the thickness of the casing at the centerline and opposing shoulders of the casing, are moved into position and adjusted to contact the outer periphery of the buffed casing to determine if the buffed casing is suitable for retreading.
Inventors
- 👤 M Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:37
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/02; G01B5/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
An apparatus for measuring the thickness of a buffed tire casing, comprising: a. a rigid mandrel on which a buffed tire casing is mounted, the mandrel having an outer curved surface for contacting at least a portion of the inner crown of the casing; b. means for causing relative movement between the mandrel and a tire casing mounted on the mandrel, such that the surface and portion of the inner crown compressibly engage each other; c. a plurality of fingers calibrated in relation to the mandrel for measuring the thickness of a buffed tire casing at the shoulders and mid-circumferential centerline thereof, the fingers being movable to positions adjacent said shoulders and centerline of a buffed tire casing mounted on the mandrel; d. means for individually mounting the fingers for separate axial movement; and e. means for mounting the fingers for unitary movement into and out of said positions.
Claim 2
Independent Claim
149 words
An apparatus for measuring the thickness of a buffed tire casing, comprising: a. a rigid mandrel on which a buffed tire casing is mounted, the mandrel having an outer curved surface for contacting at least a portion of the inner crown of the casing; b. means for causing relative movement between the mandrel and a tire casing mounted on the mandrel, such that the surface and portion of the inner crown compressibly engage each other; c. a plurality of fingers calibrated in relation to the mandrel for measuring the thickness of a buffed tire casing at the shoulders and mid-circumferential centerline thereof, the fingers being movable to positions adjacent said shoulders and centerline of a buffed tire casing mounted on the mandrel; d. means for individually mounting the fingers for separate axial movement; and e. means for mounting the fingers for unitary movement into and out of said positions.
Claim 3
Dependent Claim
44 words
The apparatus of claim 1, wherein the means (e) for mounting the fingers for unitary movement includes an arm, means for mounting the arm for rotation towards and away from the mandrel, and means for mounting the fingers in spaced relation on the arm.
Claim 4
Dependent Claim
21 words
The apparatus of claim 2, which includes a pair of stops for limiting rotation of the arm relative to the mandrel.
Claim 5
Dependent Claim
62 words
The apparatus of claim 3, wherein the means (d) for individually mounting the fingers includes a separate collar having an axial bore for receiving each of the fingers, means for mounting the collars in predetermined spaced relation on the arm, and means for maintaining the fingers in the bores of the collars while allowing the fingers to move in an axial direction.
Claim 6
Dependent Claim
54 words
The apparatus of claim 1, wherein the means (b) for causing relative movement between the mandrel and a buffed tire casing mounted thereon, includes a bar for engaging a portion of the tire beads in opposite spaced relation from the mandrel, and means for moving the bar in a direction away from the mandrel.
Claim 7
Dependent Claim
22 words
The apparatus of claim 1, which includes means for calibrating the fingers in relation to the outer curved surface of the mandrel.
Claim 8
Independent Claim
191 words
An apparatus for measuring the thickness of a buffed tire casing, comprising: a. a rigid mandrel on which a buffed tire casing is mounted, the mandrel having an outer curved surface for contacting at least a portion of the inner crown of a buffed tire casing mounted thereon; b. an arm movable to a position where the arm extends laterally across the mandrel in spaced relation from the surface, the arm being configured to proximate the transverse curvature of the mandrel; c. means for mounting the arm for rotation into and out of said position; d. a plurality of fingers disposed in spaced relation on the arm for contacting the buffed periphery of a tire casing at the shoulders and mid-centerline of the casing; e. means for individually mounting the fingers on the arm for separate axial movement; f. means for calibrating the fingers in relation to the curved surface of the mandrel for measuring the thickness of a buffed tire casing at the shoulders and centerline thereof; and g. means for causing relative movement between the mandrel and a buffed tire mounted thereon, to press the casing against the mandrel.
Claim 9
Independent Claim
191 words
An apparatus for measuring the thickness of a buffed tire casing, comprising: a. a rigid mandrel on which a buffed tire casing is mounted, the mandrel having an outer curved surface for contacting at least a portion of the inner crown of a buffed tire casing mounted thereon; b. an arm movable to a position where the arm extends laterally across the mandrel in spaced relation from the surface, the arm being configured to proximate the transverse curvature of the mandrel; c. means for mounting the arm for rotation into and out of said position; d. a plurality of fingers disposed in spaced relation on the arm for contacting the buffed periphery of a tire casing at the shoulders and mid-centerline of the casing; e. means for individually mounting the fingers on the arm for separate axial movement; f. means for calibrating the fingers in relation to the curved surface of the mandrel for measuring the thickness of a buffed tire casing at the shoulders and centerline thereof; and g. means for causing relative movement between the mandrel and a buffed tire mounted thereon, to press the casing against the mandrel.
Claim 10
Dependent Claim
32 words
The apparatus of claim 7, which includes three fingers for engaging the outer buffed periphery of a tire casing at three aligned points, including the mid-centerline and opposing shoulders of the casing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |