US3895665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforcement for rubber tires
Assignee: Carl Freudenberg KG
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Filing: 1972-12-21
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Granted: 1975-07-22
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Expires: 1992-12-21
Abstract
Abstract A mat comprising non-woven metal fibers entangled with one another in the form of a cohesive mass, said mat having at least a portion of the pores thereof filled with rubber, a tire reinforced with a mat comprising non-woven metal fibers entangled with one another in the form of a cohesive mass, preferably having at least a portion of the pores thereof filled with rubber and having the fibers bonded together with a bonding agent such as a vulcanized mixture of butadiene, styrene, vinyl pyridinelatex and resorcinol resin; the mat of nonwoven metal fibers suitably contains steel fibers with natural or synthetic fibers.
Inventors
- 👤 Wilhelm Heling
- 👤 Rudolf Ammann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:59
CPC Classifications
B; B60; B60C; B60C9/00; B60C9/0042; Y; Y10; Y10T; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10513; Y10T152/10855; Y10T152/10873
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
A tire comprising a thread and a carcass portion, said carcass portion reinforced by a non-woven mat, said mat comprising randomly disposed linearly deformed metal fibers entangled with one another in the form of a cohesive mass, said metal fibers being in the form of staple fibers having a staple length up to 100 mm. and a thickness of 0.05 to 0.3 mm, said mat having pores between said metal fibers through the thickness of said mat, said pores containing rubber.
Claim 2
Dependent Claim
81 words
A tire comprising a thread and a carcass portion, said carcass portion reinforced by a non-woven mat, said mat comprising randomly disposed linearly deformed metal fibers entangled with one another in the form of a cohesive mass, said metal fibers being in the form of staple fibers having a staple length up to 100 mm. and a thickness of 0.05 to 0.3 mm, said mat having pores between said metal fibers through the thickness of said mat, said pores containing rubber.
Claim 3
Dependent Claim
17 words
A tire according to claim 1 wherein the pores of said mass are filled with unvulcanized rubber.
Claim 4
Dependent Claim
19 words
A tire according to claim 2 wherein, in addition to said unvulcanized rubber, said mat contains a bonding agent.
Claim 5
Dependent Claim
15 words
A tire according to claim 2 wherein the metal of said metal fibers is steel.
Claim 6
Dependent Claim
19 words
A tire according to claim 4 which comprises a plurality of steel cords and a plurality of said mat.
Claim 7
Dependent Claim
33 words
A tire according to claim 5 comprising two plies of steel cords and two plies of said mat comprising non-woven metal fibers entangled with one another in the form of a cohesive mass.
Claim 8
Dependent Claim
22 words
A tire according to claim 6 wherein at least a portion of the pores of said mat are filled with unvulcanized rubber.
Claim 9
Dependent Claim
39 words
A tire according to claim 5 wherein at least a portion of the pores of the mat are filled with uNvulcanized rubber such that the weight percent of rubber in the mat is between 50 and 95% by weight.
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) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |