Patent US3739651A successfully refreshed from Google Patents.
US3739651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed pulley assembly
Assignee: Roberts Co
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Filing: 1971-05-05
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Granted: 1973-06-19
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Expires: 1991-05-05
Abstract
Abstract A variable pitch pulley includes flanges associated with inner and outer sleeves concentrically mounted for axial displacement relative to each other. The flange sleeves are supported by nonmetallic inserts which serve as bearing surfaces between adjacent members displaceable relative to each other and also serve to key adjacent members together to prevent angular relative displacement therebetween.
Inventors
- 👤 W Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:49
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/52; F16H55/56
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
A variable speed pulley assembly comprising an inner sleeve and an outer sleeve concentrically mounted with respect to each other, a belt engaging flange associated with each of said sleeves, the inner peripheral surface of said outer sleeve being spaced from the outer peripheral surface of said inner sleeve, each of said spaced sleeves having axially extending key receiving means, non-metallic, annular bearing means interposed between said inner and outer sleeves, said annular bearing means including an annular member having inner and outer peripheral portions in engagement with said inner and outer sleeves and key means integral with said annular member and extending axially of said annular member and said sleeves, said axially extending key means including keys projecting from the inner and outer peripheral surfaces of said annular member cooperatively engaging said key receiving means for transmitting angular forces from one sleeve to the other sleeve and for permitting axial sliding displacement while preventing angular displacement of said inner and outer sleeves relative to each other.
Claim 2
Dependent Claim
167 words
A variable speed pulley assembly comprising an inner sleeve and an outer sleeve concentrically mounted with respect to each other, a belt engaging flange associated with each of said sleeves, the inner peripheral surface of said outer sleeve being spaced from the outer peripheral surface of said inner sleeve, each of said spaced sleeves having axially extending key receiving means, non-metallic, annular bearing means interposed between said inner and outer sleeves, said annular bearing means including an annular member having inner and outer peripheral portions in engagement with said inner and outer sleeves and key means integral with said annular member and extending axially of said annular member and said sleeves, said axially extending key means including keys projecting from the inner and outer peripheral surfaces of said annular member cooperatively engaging said key receiving means for transmitting angular forces from one sleeve to the other sleeve and for permitting axial sliding displacement while preventing angular displacement of said inner and outer sleeves relative to each other.
Claim 3
Dependent Claim
30 words
A variable speed pulley assembly as recited in claim 1, wherein the keys projecting from the opposite surfaces of the bearing means are disposed at 90* relative to each other.
Claim 4
Dependent Claim
22 words
A variable speed pulley assembly as recited in claim 2, and further including spring means for biasing said flanges toward each other.
Claim 5
Dependent Claim
56 words
A variable speed pulley assembly as recited in claim 3, and further including a tubular member for mounting upon a drive shaft and concentrically mounted with respect to said inner and outer sleeves, second annular bearing means interposed between said inner sleeve and said tubular member, and means for securing said tubular member to the shaft.
Claim 6
Dependent Claim
55 words
A variable speed pulley assembly as recited in claim 4, wherein opposed surfaces of said inner sleeve and said tubular member have parallel key receiving means formed therein, said second bearing means formed with integral keys for engaging said key receiving means for preventing angular relative movement between said inner sleeve and said tubular member.
Claim 7
Dependent Claim
75 words
A bearing insert adapted to be interposed between opposed surfaces of two concentrically mounted members having keyways therein to permit sliding movement of the members while preventing angular relative displacement between the members comprising, an annular, non-metallic shell member, key means, extending axially of said annular shell member, integral with said annular shell member and projecting from the inner and the outer peripheral surfaces of said shell member for engaging keyways of concentrically mounted members.
Claim 8
Dependent Claim
75 words
A bearing insert adapted to be interposed between opposed surfaces of two concentrically mounted members having keyways therein to permit sliding movement of the members while preventing angular relative displacement between the members comprising, an annular, non-metallic shell member, key means, extending axially of said annular shell member, integral with said annular shell member and projecting from the inner and the outer peripheral surfaces of said shell member for engaging keyways of concentrically mounted members.
Claim 9
Dependent Claim
26 words
A bearing insert as recited in claim 6, wherein said key means includes a plurality of keys disposed at ninety degree angles relative to each other.
References Cited (Backward Citations)
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US3175409A
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |