US4379104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for moulding a tire for a wheel rim
Assignee: Individual
•
Filing: 1981-03-16
•
Granted: 1983-04-05
•
Expires: 2001-03-16
Abstract
Abstract The invention relates to a method of moulding a tire for a wheel rim by means of a mould having mould parts, said mould parts being movable between a closed working position in which they enclose a mould cavity with the shape of the tire and an open position in which said mould parts are spaced apart, wherein in the open position of the mould parts a hollow tire core is positioned in the mould cavity while being receivable with respect to said parts, wherein the mould parts are moved into the working position, in which a residual cavity not occupied by the tire core is left free in the mould cavity, said residual cavity. Preferably the tire core is arranged on the wheel rim before being positioned with respect to the mould parts. The invention also provides a device for moulding a tire and a tire obtained with the aid of the method and device.
Inventors
- 👤 Arie Koorevaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0679; B29D30/02; B60; B60C; B60C7/00; B60C7/10; B60C7/12; B60C7/121; F; F16; F16H; F16H41/00; F16H41/24; F16H2041/246; Y; Y10; Y10S; Y10S264/00; Y10S264/83
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
121 words
The method of making a tire which comprises the steps of: (a) providing an annular mold cavity which is of generally crescent shape in radial cross section by enclosing with abutment of the cavity defined rim portion a thin walled annular core between mold halves which define a toroidal space therebetween, said core being formed of synthetic resinous material; (b) introducing foamable synthetic resinous material into said mold cavity in amount sufficient to fill said cavity completely when such material has foamed; (c) foaming such material to form a tire comprising the annular, thin walled core having an annular covering of foamed, synthetic resinous material of generally crescent-shaped radial cross section thereon; and (d) removing said tire from the mold halves.
Claim 2
Independent Claim
121 words
The method of making a tire which comprises the steps of: (a) providing an annular mold cavity which is of generally crescent shape in radial cross section by enclosing with abutment of the cavity defined rim portion a thin walled annular core between mold halves which define a toroidal space therebetween, said core being formed of synthetic resinous material; (b) introducing foamable synthetic resinous material into said mold cavity in amount sufficient to fill said cavity completely when such material has foamed; (c) foaming such material to form a tire comprising the annular, thin walled core having an annular covering of foamed, synthetic resinous material of generally crescent-shaped radial cross section thereon; and (d) removing said tire from the mold halves.
Claim 3
Dependent Claim
22 words
The method as defined in claim 1 which includes the step of providing said core in the form of a hollow annulus.
Claim 4
Dependent Claim
30 words
The method as defined in claim 1 or 2 including the step of providing the core with corrugations defining ribs which extend radially with respect to the annular configuration thereof.
Claim 5
Dependent Claim
21 words
The method as defined in claim 1 including the step of mounting said core on a wheel prior to step (a).
Claim 6
Dependent Claim
22 words
The method as defined in claim 4 which includes the step of providing said core in the form of a hollow annulus.
Claim 7
Dependent Claim
30 words
The method as defined in claim 4 or 5 including the step of providing the core with corrugations defining ribs which extend radially with respect to the annular configuration thereof.
Claim 8
Dependent Claim
46 words
The method as defined in claim 1 including the step of providing a wheel in separate halves defining a rim portion and wherein the core is mounted on said rim portion of the wheel by snap-fitting said wheel halves together through the center of said core.
Claim 9
Dependent Claim
22 words
The method as defined in claim 7 which includes the step of providing said core in the form of a hollow annulus.
Claim 10
Dependent Claim
30 words
The method as defined in claim 7 or 8 including the step of providing the core with corrugations defining ribs which extend radially with respect to the annular configuration thereof.
Claim 11
Dependent Claim
26 words
The method as defined in claim 15 including the step of rotating the mold halves during step (c) to subject the foaming material to centrifugal force.
Claim 12
Dependent Claim
47 words
The method as defined in claim 1, 2, 4, 5, 7, 8 or 10 which includes the step of cooling said mold halves during step (c) whereby to form a hard, non-foamed and wear-resistance layer at the outer surface of the foamed material constituting the tire body.
Claim 13
Dependent Claim
28 words
The method as defined in claim 11 including the step of providing the core with corrugations defining ribs which extend radially with respect to the annular configuration thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |