US3620338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronizing speed change gears
Assignee: Individual
•
Filing: 1969-10-17
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Granted: 1971-11-16
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Expires: 1989-10-17
Abstract
Abstract A synchronizing speed change gear comprises a shaft, a gear wheel arranged loosely on the shaft, a toothed annular body arranged on the gear wheel and a gear shift sleeve rotatable with the shafts. The gear shift sleeve has teeth which upon an axial motion comes into meshed engagement with the teeth of the annular body to drivably connect it to the shaft. To limit the extent of the axial motion of the gear shift sleeve stops are provided by projections or shoulders formed on the sides of the teeth of the annular body or of the gear shift sleeve.
Inventors
- 👤 Yukio Tomita
- 👤 Ohaza Ohbayashi
- 👤 Shinichi Ito
- 👤 Yositaka Sogo
- 👤 Hideki Morino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:58
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/02; F16D23/04; F16D23/06; F16D2023/0656; F16D2023/0662
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
292 words
A synchronizing speed change gear comprising, in combination, a shaft; a gear wheel rotatably mounted on said shaft; a hub member secured to rotate with said shaft and positioned axially adjacent said gear wheel, said hub member having gear teeth on the external circumferential periphery; a gear shift sleeve having gear teeth on its internal circumferential periphery meshing with the teeth on said hub member, said gear shift sleeve being mounted for axial displacement relative to said hub member from a neutral position to a gear shifting position; an annular body secured to rotate with said gear wheel and having gear teeth on the external circumferential periphery meshing with the teeth on said gear shift sleeve upon axial movement of said gear shift sleeve in the gear shifting direction; a synchronizing ring positioned axially between said hub member and said annular body and having gear teeth on its external periphery meshing with the gear teeth on said gear shift sleeve upon axial displacement of said gear shift sleeve in the gear shifting direction to couple said hub member in driving relation with said annular body; and stop means formed iNtegrally with those axial end faces of the teeth, of one of said annular body and said gear shift sleeve, more remote from the other of said annular body and said gear shift sleeve, said stop means extending circumferentially into the intertooth spaces between circumferentially adjacent teeth and being engageable with the teeth of the other of said annular body and said gear shift sleeve entering into said intertooth spaces upon axial displacement of said gear shift sleeve, to limit the actual displacement of said gear shift sleeve from neutral in the gear shifting direction to prevent overtravel of said gear shift sleeve.
Claim 2
Dependent Claim
292 words
A synchronizing speed change gear comprising, in combination, a shaft; a gear wheel rotatably mounted on said shaft; a hub member secured to rotate with said shaft and positioned axially adjacent said gear wheel, said hub member having gear teeth on the external circumferential periphery; a gear shift sleeve having gear teeth on its internal circumferential periphery meshing with the teeth on said hub member, said gear shift sleeve being mounted for axial displacement relative to said hub member from a neutral position to a gear shifting position; an annular body secured to rotate with said gear wheel and having gear teeth on the external circumferential periphery meshing with the teeth on said gear shift sleeve upon axial movement of said gear shift sleeve in the gear shifting direction; a synchronizing ring positioned axially between said hub member and said annular body and having gear teeth on its external periphery meshing with the gear teeth on said gear shift sleeve upon axial displacement of said gear shift sleeve in the gear shifting direction to couple said hub member in driving relation with said annular body; and stop means formed iNtegrally with those axial end faces of the teeth, of one of said annular body and said gear shift sleeve, more remote from the other of said annular body and said gear shift sleeve, said stop means extending circumferentially into the intertooth spaces between circumferentially adjacent teeth and being engageable with the teeth of the other of said annular body and said gear shift sleeve entering into said intertooth spaces upon axial displacement of said gear shift sleeve, to limit the actual displacement of said gear shift sleeve from neutral in the gear shifting direction to prevent overtravel of said gear shift sleeve.
Claim 3
Dependent Claim
66 words
A synchronizing speed change gear, as set forth in claim 1, wherein the facing lateral surfaces of the teeth on said annular body and the teeth on said gear shift sleeve are tapered in parallel relation so that the teeth on said gear shift sleeve are prevented from disengagement with the teeth on said annular body in the gear shifting position of said gear shift sleeve.
Claim 4
Dependent Claim
100 words
A synchronizing speed change gear, as set forth in claim 1, wherein the axial end portions of the teeth of said gear shift sleeve facing the teeth of said annular body have a reduced thickness relative to the remaining parts of the teeth of said gear shift sleeve; said remaining parts having a thickness greater than the intertooth spacing of the teeth of said annular body to form shoulders on the teeth of said gear shift sleeve engageable with the teeth of said annular body, in the gear shifting position of said gear shift sleeve, to constitute said stop means.
Claim 5
Dependent Claim
66 words
A synchronizing speed change gear, as set forth in claim 1 wherein said stop means comprise projections on the outer axial end faces of the teeth of said annular body, said projections extending circumferentially into the intertooth spaces of said annular body to limit axial movement of the teeth of said gear shift lever upon movement of said gear shift lever in the gear shifting direction.
Claim 6
Dependent Claim
33 words
A synchronizing speed change gear, as set forth in claim 4, wherein said projections on adjacent teeth on said annular body extend completely across said intertooth spaces to form a continuous circumferential wall.
Claim 7
Dependent Claim
27 words
A synchronizing speed change gear, as set forth in claim 4, wherein said projections on adjacent teeth on said annular body are disposed in circumferentially spaced relationship.
Claim 8
Dependent Claim
68 words
A synchronizing speed change gear, as set forth in claim 6, in which those axial end surfaces of the teeth on said gear shift sleeve facing said annular body are formed as radial ridges which, upon movement of said gear shift sleeve in the gear shifting direction, enter into the circumferential spaces between adjacent projections on the teeth of said annular body to engage said circumferentially adjacent projections.
Claim 9
Dependent Claim
40 words
A synchronizing speed change gear, as set forth in claim 4, wherein the axially interengageable surfaces of said projections and of said teeth on said gear shift sleeve are tapered to interfit one into the other in surface contacting relationship.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |