Patent US3696685A successfully refreshed from Google Patents.
US3696685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toothed pulleys
Assignee: Fiat SpA
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Filing: 1971-04-16
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Granted: 1972-10-10
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Expires: 1991-04-16
Abstract
Abstract A toothed pulley of the kind which meshes with a toothed belt in a cam-shaft drive for an internal combustion engine has a body, including a hub, moulded in plastics, with a cup-shaped metal hub reinforcement which is incorporated in the plastics material of the hub. A cavity is formed in the hub to receive a cylindrical end of a shaft to which the pulley is to be secured, the cylindrical surface of the cavity being formed by the plastics material of the hub and not by the metal hub reinforcement.
Inventors
- 👤 Aurelio Lampredi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:45
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/0018; F16H57/0025; F16H55/00; F16H55/02; F16H55/17; F16H55/171; Y; Y10; Y10S; Y10S474/00; Y10S474/903; Y10T; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/19893; Y10T74/19907
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
A toothed pulley adapted to mesh with a toothed belt, said pulley comprising a body including a hub having means defining a cylindrical axial cavity forming a seat adaptEd to receive a cylindrical end of a shaft; said cavity having a bottom wall provided with holes to receive means for securing the pulley to the shaft, and further including the improvement which consists in: a. the body of the pulley being moulded in plastics material; b. a metal insert incorporated in said hub of the pulley, said insert being shaped as a cup, having a base portion and a tubular portion; c. said base portion of said metal insert forming the end wall of said cylindrical seat for the shaft, and d. said tubular portion of said metal insert being totally incorporated in the plastics material of said hub of the pulley and surrounding a cylindrical plastics portion which forms the cylindrical wall of said seat adapted to receive said end of the shaft.
Claim 2
Dependent Claim
164 words
A toothed pulley adapted to mesh with a toothed belt, said pulley comprising a body including a hub having means defining a cylindrical axial cavity forming a seat adaptEd to receive a cylindrical end of a shaft; said cavity having a bottom wall provided with holes to receive means for securing the pulley to the shaft, and further including the improvement which consists in: a. the body of the pulley being moulded in plastics material; b. a metal insert incorporated in said hub of the pulley, said insert being shaped as a cup, having a base portion and a tubular portion; c. said base portion of said metal insert forming the end wall of said cylindrical seat for the shaft, and d. said tubular portion of said metal insert being totally incorporated in the plastics material of said hub of the pulley and surrounding a cylindrical plastics portion which forms the cylindrical wall of said seat adapted to receive said end of the shaft.
Claim 3
Dependent Claim
33 words
Pulley as claimed in claim 1, wherein said tubular portion of said metal insert extends for a substantial portion of the length of the cylindrical seat for receiving the end of the shaft.
Claim 4
Dependent Claim
33 words
Pulley as claimed in claim 1, wherein the external surface of said base portion of said metal insert is substantially flush with one of the radial surfaces of said hub of the pulley.
Claim 5
Dependent Claim
32 words
Pulley as claimed in claim 1, wherein said metal insert has an annular shoulder between the external cylindrical surface of said tubular portion and the external radial surface of said base portion.
Claim 6
Dependent Claim
21 words
Pulley as claimed in claim 1, wherein the body of the pulley is moulded in polyamide resin reinforced with glass fibers.
References Cited (Backward Citations)
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Cited
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US3199364A
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US3257860A
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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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |