Patent US1557706A successfully refreshed from Google Patents.
Patent US4181488A successfully refreshed from Google Patents.
US4181488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire tread forming mold body
Assignee: Caterpillar Inc
•
Filing: 1979-01-29
•
Granted: 1980-01-01
•
Expires: 1999-01-29
Abstract
Abstract A body having rubber material thereon is positioned on a lower member, and an upper member is moved toward the lower member, such relative movement causing tread-forming shoes to move to inward positions to form a tread on the rubber material. As an alternative, the upper and lower members may be brought together, and rubber material may be injected into position to have a tread formed thereon. Upon movement of the upper and lower member relatively apart, the rubber material is made to remain in contact with the shoes, and the body is removed, whereupon an annular core having rubber material thereon is disposed on the lower member, and the upper and lower members are again brought together to deposit the rubber material in contact with the shoes onto the rubber material on the core.
Inventors
- 👤 Charles E. Grawey
- 👤 John J. Groezinger
- 👤 Quentin T. Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:34
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0606; B29D30/0629; B29D2030/063; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
A mold body on which electromeric material can be positioned for formation of a tread thereon comprising a generally annular main body portion and a continuous rib disposed about the outer periphery of the main body portion including a plurality of poppet valve members movably mounted thereon and movable between retracted positions relative to the main body portion and the extended positions relative to the main body portion; and mean for selectively extending and retracting the poppet valve members.
Claim 2
Dependent Claim
79 words
A mold body on which electromeric material can be positioned for formation of a tread thereon comprising a generally annular main body portion and a continuous rib disposed about the outer periphery of the main body portion including a plurality of poppet valve members movably mounted thereon and movable between retracted positions relative to the main body portion and the extended positions relative to the main body portion; and mean for selectively extending and retracting the poppet valve members.
Claim 3
Dependent Claim
48 words
The mold body of claim 1 wherein said means for extending the poppet valve members includes means for introducing pressurized fluid thereto within the main body portion, the poppet valve members being positioned to allow the flow of pressurized fluid therepast when they are in the extended position.
Claim 4
Dependent Claim
67 words
The mold body of claim 2 wherein each of said poppet valve members includes an outer edge surface generally flush with the outer surface of the main body portion when the valve member is in its retracted position, the outer edge surface of each poppet valve member being spaced from the surface of the main body portion when the poppet valve member is in its extended position.
Claim 5
Dependent Claim
70 words
The mold body of claim 1 which includes a movable body member movable relative to the main body portion, the movable body member having a passage means there through and being positionable relative to the main body portion to allow the flow of elastomeric through the passage means during formation of the tread pattern thereon and movable to a position blocking the flow of elastomeric material through the passage means.
Claim 6
Dependent Claim
20 words
The mold body of claim 4 wherein the movable body member includes a cutting member for cutting the elastomeric material.
Claim 7
Dependent Claim
28 words
The mold body of claim 5 including resilient means for biasing the movable body member toward the position blocking the flow of elastomeric material through said passage means.
References Cited (Backward Citations)
US2672914A
Cited
US2904830A
Cited
US3183551A
Cited
US3145423A
Cited
US3183292A
Cited
US3660002A
Cited
US3868203A
Cited
US3778203A
Cited
US3854852A
Cited
US4013390A
Cited
US4059375A
Cited
US4022554A
Cited
US4025250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |