US3704082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Segmented tire mold having hinged arcuate tread sectors
Assignee: Individual
•
Filing: 1970-10-19
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Granted: 1972-11-28
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Expires: 1990-10-19
Abstract
Abstract A three-piece segmented tire mold including opposed sidewall mold sections that are movable toward and away from each other for molding the sidewall portions of a pneumatic tire, and further including a series of arcuate tread mold sectors adapted to register with the opposed sidewall mold sections and with the arcuate tread sectors being hinged to one of said mold sections so as to be movable around a fixed hinge point for the purpose of receiving a tire and subsequently permitting removal of the same following vulcanization.
Inventors
- 👤 Dwight E Hottle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:03
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0606; B29D30/0629
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
242 words
A segmented tire mold of the character described, comprising; A. a lower mold section having a sidewall molding surface thereon; B. a plurality of arcuate tread mold sectors 1. having tread molding surfaces and 2. each being hinged to said lower mold section around at least one fixed pivot point a. whereby said tread mold sectors may move between a ''''closed'''' position wherein the tread mold surfaces thereof are in contiguous registry with the sidewall molding surfaces, and an ''''open'''' position wherein the ends of said tread mold sections are spaced from each other and said sidewall molding surfaces of said first mold section; C. means for pivoting said tread mold sectors around said pivot point between said ''''open'''' and ''''closed'''' positions and moving said sectors both radially and axially with respect to said first mold section, said means being a piston interconnecting the lower mold section with an upper portion of each said tread mold section whereby a lifting movement is performed by said tread molding sections during movement from said ''''closed'''' position to said ''''open'''' position; and D. a second mold section having a sidewall molding surface complemental to said first sidewall mold surface and adapted to be in registry therewith when said tread mold sectors are in said closed position, whereby the molding surfaces of said first mold section, said second mold section, and said arcuate tread sections form a tire molding cavity when in registry with each other.
Claim 2
Dependent Claim
242 words
A segmented tire mold of the character described, comprising; A. a lower mold section having a sidewall molding surface thereon; B. a plurality of arcuate tread mold sectors 1. having tread molding surfaces and 2. each being hinged to said lower mold section around at least one fixed pivot point a. whereby said tread mold sectors may move between a ''''closed'''' position wherein the tread mold surfaces thereof are in contiguous registry with the sidewall molding surfaces, and an ''''open'''' position wherein the ends of said tread mold sections are spaced from each other and said sidewall molding surfaces of said first mold section; C. means for pivoting said tread mold sectors around said pivot point between said ''''open'''' and ''''closed'''' positions and moving said sectors both radially and axially with respect to said first mold section, said means being a piston interconnecting the lower mold section with an upper portion of each said tread mold section whereby a lifting movement is performed by said tread molding sections during movement from said ''''closed'''' position to said ''''open'''' position; and D. a second mold section having a sidewall molding surface complemental to said first sidewall mold surface and adapted to be in registry therewith when said tread mold sectors are in said closed position, whereby the molding surfaces of said first mold section, said second mold section, and said arcuate tread sections form a tire molding cavity when in registry with each other.
Claim 3
Dependent Claim
65 words
The device of claim 1 further characterized by the fact that each of said tread mold sectors include a radially inwardly projecting surface defining the crown region of said tire; said inwardly projecting surface of said mold sector acting as a pry bar around said hinge point during removal of said tire following vulcanization thereof upon radial and axial movement of said tread mold sectors.
Claim 4
Dependent Claim
207 words
each being hinged to said lower mold section around at least one fixed pivot point a. whereby said tread mold sectors may move between a ''''closed'''' position wherein the tread mold surfaces thereof are in contiguous registry with the sidewall molding surfaces, and an ''''open'''' position wherein the ends of said tread mold sections are spaced from each other and said sidewall molding surfaces of said first mold section; C. means for pivoting said tread mold sectors around said pivot point between said ''''open'''' and ''''closed'''' positions and moving said sectors both radially and axially with respect to said first mold section, said means being a piston interconnecting the lower mold section with an upper portion of each said tread mold section whereby a lifting movement is performed by said tread molding sections during movement from said ''''closed'''' position to said ''''open'''' position; and D. a second mold section having a sidewall molding surface complemental to said first sidewall mold surface and adapted to be in registry therewith when said tread mold sectors are in said closed position, whereby the molding surfaces of said first mold section, said second mold section, and said arcuate tread sections form a tire molding cavity when in registry with each other.
Claim 5
Dependent Claim
207 words
each being hinged to said lower mold section around at least one fixed pivot point a. whereby said tread mold sectors may move between a ''''closed'''' position wherein the tread mold surfaces thereof are in contiguous registry with the sidewall molding surfaces, and an ''''open'''' position wherein the ends of said tread mold sections are spaced from each other and said sidewall molding surfaces of said first mold section; C. means for pivoting said tread mold sectors around said pivot point between said ''''open'''' and ''''closed'''' positions and moving said sectors both radially and axially with respect to said first mold section, said means being a piston interconnecting the lower mold section with an upper portion of each said tread mold section whereby a lifting movement is performed by said tread molding sections during movement from said ''''closed'''' position to said ''''open'''' position; and D. a second mold section having a sidewall molding surface complemental to said first sidewall mold surface and adapted to be in registry therewith when said tread mold sectors are in said closed position, whereby the molding surfaces of said first mold section, said second mold section, and said arcuate tread sections form a tire molding cavity when in registry with each other.
References Cited (Backward Citations)
US3097397A
Cited
CA771553A
Cited
US1179898A
Cited
DE1169118B
Cited
US3171163A
Cited
US3460197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |