US3734557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric bumper
Assignee: NATIONAL RUBBER COMPANY Inc 394 SYMINGTON AVE TORONTO ONTARIO CANADA M6N 2WS
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Filing: 1971-10-14
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Granted: 1973-05-22
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Expires: 1991-10-14
Abstract
Abstract An integral elongated bumper having impact absorption properties for mounting on a conventional basic metal bumper of an automobile comprising an overlay of elastomeric material covering a core of elastomeric material having short fibers dispersed densely and randomly throughout said core and integrally bonded to the core substance, increasing the impact resistance of said core over that of the overlay.
Inventors
- 👤 R Mckenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:53
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/44; B60R19/445
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
30 words
A bumper as defined in claim 1 wherein said overlay provides a surface veneer for said core; the overlay substance having greater resilience and weather resistance than the core substance.
Claim 2
Dependent Claim
20 words
A bumper as defined in claim 1 wherein said fibers are trained substantially in the longitudinal direction of the core.
Claim 3
Dependent Claim
55 words
A bumper as defined in claim 1 wherein said overlay covers one side of said bumper and spaced studs, embedded in said core, project from its other side; each said stud having a broad head embedded as aforesaid and a shoulder narrower than said head, which is approximately flush with the said other bumper side.
Claim 4
Dependent Claim
12 words
A bumper as defined in claim 1 wherein said bumper is hollow.
Claim 5
Dependent Claim
20 words
A bumper as defined in claim 1 wherein said core has a lower coefficient of thermal expansion than said overlay.
Claim 6
Dependent Claim
31 words
A bumper as defined in claim 2 wherein said fibers are trained substantially in the longitudinal direction of the core providing said core with substantial tensile strength in its longitudinal direction.
Claim 7
Dependent Claim
12 words
A bumper as defined in claim 4 wherein said studs are discrete.
Claim 8
Dependent Claim
13 words
A bumper as defined in claim 4 wherein said studs are corrosion resistant.
Claim 9
Dependent Claim
15 words
A bumper as defined in claim 4 wherein said studs are corrosion resistant and discrete.
Claim 10
Dependent Claim
55 words
A bumper as defined in claim 7 wherein said overlay covers one side of said bumper and spaced studs, embedded in said core, project from its other side; each said stud having a broad head embedded as aforesaid and a shoulder narrower than said head, which is approximately flush with the said other bumper side.
Claim 11
Dependent Claim
12 words
A bumper as defined in claim 11 wherein said studs are discrete.
Claim 12
Dependent Claim
19 words
A bumper as defined in claim 11 wherein a bonding layer is interposed between said overlay and said core.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |