US3653273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-speed transmission
Assignee: Minnesota Automotive Inc
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Filing: 1970-11-04
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Granted: 1972-04-04
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Expires: 1990-11-04
Abstract
Abstract Disclosed is a first sprocket adapted to operate as a driving sprocket for the rear wheel of a motor bicycle or the like and a second sprocket adapted to be driven through a chain by a motor, which second sprocket is connected through an over running clutch to a shaft mounting the first sprocket. A third sprocket is mounted on the shaft for rotation relative to the shaft and engageable with the shaft through a manually operable disc clutch. The speed of driving the second and third sprockets is such that whenever the third sprocket is driven, by engaging the manually engageable clutch, the shaft turns at a speed to cause the over running clutch to operate as a bearing so that the second sprocket has no effect on the shaft.
Inventors
- 👤 Robert V Albertson
- 👤 Victor N Albertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:55
CPC Classifications
B; B62; B62M; B62M25/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
187 words
Two-speed transmission apparatus comprising: a. base means for operatively mounting the transmission apparatus; b. a first transmission element; c. means mounting said first transmission element on said base means for rotation about an axis, at least a portion of said mounting means rotating with said first transmission element; d. a second transmission element constructed for rotation at a first speed; e. over-running clutch means rotatably connecting said second transmission element to said mounting means for rotation about said axis, said over-running clutch means being characterized by operating as a clutch during rotation of said mounting means at the first speed and operating as a bearing for a second speed of rotation of said mounting means; f. a third transmission element constructed for rotation at the second speed; and g. manually actuatable clutch means connected to said third transmission element and said mounting means for operatively connecting said third transmission element to said mounting means upon actuation of said manually actuatable clutch means whereby said third transmission element and said mounting means rotate at the second speed to cause said over-running clutch means to operate as a bearing.
Claim 2
Dependent Claim
187 words
Two-speed transmission apparatus comprising: a. base means for operatively mounting the transmission apparatus; b. a first transmission element; c. means mounting said first transmission element on said base means for rotation about an axis, at least a portion of said mounting means rotating with said first transmission element; d. a second transmission element constructed for rotation at a first speed; e. over-running clutch means rotatably connecting said second transmission element to said mounting means for rotation about said axis, said over-running clutch means being characterized by operating as a clutch during rotation of said mounting means at the first speed and operating as a bearing for a second speed of rotation of said mounting means; f. a third transmission element constructed for rotation at the second speed; and g. manually actuatable clutch means connected to said third transmission element and said mounting means for operatively connecting said third transmission element to said mounting means upon actuation of said manually actuatable clutch means whereby said third transmission element and said mounting means rotate at the second speed to cause said over-running clutch means to operate as a bearing.
Claim 3
Dependent Claim
34 words
Two-speed transmission apparatus as set forth in claim 1 wherein the mounting means includes an elongated shaft rotatably mounted on the base means and having the first transmission element affixed thereto for rotation therewith.
Claim 4
Dependent Claim
4 words
a first transmission element,
Claim 5
Dependent Claim
4 words
a first transmission element,
Claim 6
Dependent Claim
41 words
means mounting said first transmission element on said base means for rotation about an axis generally parallel with but spaced from the shaft of said motor means, at least a portion of said mounting means rotating with said first tRansmission element,
Claim 7
Dependent Claim
41 words
means mounting said first transmission element on said base means for rotation about an axis generally parallel with but spaced from the shaft of said motor means, at least a portion of said mounting means rotating with said first tRansmission element,
Claim 8
Dependent Claim
38 words
Two-speed transmission apparatus as set forth in claim 1 wherein the mounting means includes an elongated shaft fixedly attached to the base means and a sleeve rotatably mounted on the shaft and affixed to the first transmission element.
Claim 9
Dependent Claim
49 words
Two-speed transmission apparatus as set forth in claim 1 wherein the manually actuatable clutch means includes a disk type clutch engageable through axial pressure thereon and a two-part actuator mounted adjacent thereto for producing axial pressure on the clutch upon movement of one actuator part relative to the other.
Claim 10
Dependent Claim
11 words
a second transmission element constructed for rotation at a first speed,
Claim 11
Dependent Claim
11 words
a second transmission element constructed for rotation at a first speed,
Claim 12
Dependent Claim
54 words
over-running clutch means rotatably connecting said second transmission element to said mounting means for rotation about said axis, said over-running clutch means being characterized by operating as a clutch during rotation of said mounting means at the first speed and operating as a bearing for a second speed of rotation of said mounting means;
Claim 13
Dependent Claim
54 words
over-running clutch means rotatably connecting said second transmission element to said mounting means for rotation about said axis, said over-running clutch means being characterized by operating as a clutch during rotation of said mounting means at the first speed and operating as a bearing for a second speed of rotation of said mounting means;
Claim 14
Dependent Claim
88 words
Two-speed transmission apparatus as set forth in claim 4 wherein the two-part actuator includes a pair of generally parallel, axially spaced apart disks mounted on a common axis, ball receiving grooves defined by adjacent surfaces of said disks having a plurality of spaced apart balls therein, and at least one of said disks having a plurality of outwardly extending ramps formed in the adjacent surface thereof to receive said balls thereon upon relative rotation of said disks in a first direction and cause axial separation of said disks.
Claim 15
Dependent Claim
19 words
Two-speed transmission apparatus as set forth in claim 1 wherein the first, second and third transmission elements include sprockets.
Claim 16
Dependent Claim
12 words
a third transmission element constructed for rotation at the second speed; and
Claim 17
Dependent Claim
12 words
a third transmission element constructed for rotation at the second speed; and
Claim 18
Dependent Claim
89 words
manually actuatable clutch means connected to said third transmission element and said mounting means for operatively connecting said third transmission element to said mounting means upon actuation of said manually actuatable clutch means whereby said third transmission element and said mounting means rotate at the second speed to cause said over-running clutch means to operate as a bearing; and g. said second transmission element being connected to said first driving element for rotation therewith and said third transmission element being connected to said second driving element for rotation therewith.
Claim 19
Dependent Claim
89 words
manually actuatable clutch means connected to said third transmission element and said mounting means for operatively connecting said third transmission element to said mounting means upon actuation of said manually actuatable clutch means whereby said third transmission element and said mounting means rotate at the second speed to cause said over-running clutch means to operate as a bearing; and g. said second transmission element being connected to said first driving element for rotation therewith and said third transmission element being connected to said second driving element for rotation therewith.
Claim 20
Dependent Claim
93 words
A two-speed drive system comprising: a. a frame; b. motor means fixedly mounted on said base having a shaft affixed to said motor means for rotation by said motor means; c. a first driving element affixed to said shaft for rotation therewith; d. a second driving element rotatably mounted on said shaft for rotation relative to said shaft; e. driving clutch means mounted on said shaft for operatively connecting said second driving element to said shaft for rotation with said shaft upon actuation of said driving clutch means; f. two-speed transmission apparatus including
Claim 21
Dependent Claim
93 words
A two-speed drive system comprising: a. a frame; b. motor means fixedly mounted on said base having a shaft affixed to said motor means for rotation by said motor means; c. a first driving element affixed to said shaft for rotation therewith; d. a second driving element rotatably mounted on said shaft for rotation relative to said shaft; e. driving clutch means mounted on said shaft for operatively connecting said second driving element to said shaft for rotation with said shaft upon actuation of said driving clutch means; f. two-speed transmission apparatus including
Claim 22
Dependent Claim
19 words
A two-speed system as set forth in claim 7 wherein the driving clutch means is a centrifugal type clutch.
Claim 23
Dependent Claim
31 words
A two-speed drive system as set forth in claim 7 wherein the first and second driving elements and the second and third transmission elements are sprockets connected by means of chains.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |