US3795293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blocking-synchronization for change-speed gears of motor vehicles
Assignee: Daimler Benz AG
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Filing: 1971-12-15
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Granted: 1974-03-05
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Expires: 1991-12-15
Abstract
Abstract A blocking synchronization for motor vehicle change-speed transmissions in which an axially displaceable shifting sleeve cooperates with synchronizing rings also axially displaceable and rotatable within limits; the synchronizing rings, in turn, cooperate by means of blocking surfaces with the engaging tooth system at the gear whereby the synchronizing rings are centered as well as limited in their axial movability with respect to the shifting sleeve at the gear part carrying the same.
Inventors
- 👤 G Worner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:17
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/02; F16D23/025; F16D23/04; F16D23/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
170 words
A blocking synchronization for use with motor vehicle changespeed gears and the like comprising: a gear wheel rotatable about a gear wheel axis, engaging teeth means on said gear wheel, a shifting sleeve axially displaceable along said axis between positions in and out of driving engagement with said engaging teeth means, synchronizing ring means interposed between said gear wheel and shifting sleeve, said synchronizing ring means being engageable with said shifting sleeve for displacement along said axis in response to axial displacement of said shifting sleeve, said synchronizing ring means including blocking surface means engageable with corresponding blocking surface means on said engaging teeth means of said gear wheel to transmit rotational forces between said synchronizing ring means and said gear wheel, and interengaging guide surface portions at said gear wheel and said synchronizing ring means for maintaining said synchronizing ring means in a central position with respect to said axis during axial movement of said synchronizing ring means, said guide surface portion being separate from said blocking surface means.
Claim 2
Dependent Claim
170 words
A blocking synchronization for use with motor vehicle changespeed gears and the like comprising: a gear wheel rotatable about a gear wheel axis, engaging teeth means on said gear wheel, a shifting sleeve axially displaceable along said axis between positions in and out of driving engagement with said engaging teeth means, synchronizing ring means interposed between said gear wheel and shifting sleeve, said synchronizing ring means being engageable with said shifting sleeve for displacement along said axis in response to axial displacement of said shifting sleeve, said synchronizing ring means including blocking surface means engageable with corresponding blocking surface means on said engaging teeth means of said gear wheel to transmit rotational forces between said synchronizing ring means and said gear wheel, and interengaging guide surface portions at said gear wheel and said synchronizing ring means for maintaining said synchronizing ring means in a central position with respect to said axis during axial movement of said synchronizing ring means, said guide surface portion being separate from said blocking surface means.
Claim 3
Dependent Claim
36 words
A blocking synchronization according to claim 1, characterized in that the synchronizing ring means is maintained in said central position exclusively by the respective interengaging guide surface means at said gear wheel and said synchronizing means.
Claim 4
Dependent Claim
78 words
A blocking synchronization according to claim 1, further comprising a ring spring guided in said synchronizing ring means and engaging with a cone surface at said gear wheel for producing a force at the synchronizing ring means directed toward the shifting sleeve, characterized in that at the edge of the cone surface facing the shifting sleeve, a radial shoulder is provided in said gear wheel as an abutment for the ring spring guided in the synchronizing ring means.
Claim 5
Dependent Claim
52 words
A blocking synchronization according to claim 3, wherein said blocking surface means of said synchronizing ring means includes circumferentially distributed inwardly projected extensions, and wherein said blocking surface means of said engaging teeth means of said gear wheel include apertures in said gear wheel having side wall portions engageable with said extensions.
Claim 6
Dependent Claim
24 words
A blocking synchronization according to claim 4, wherein tooth tips of said engaging teeth means form the guide surface portion of said gear wheel.
Claim 7
Dependent Claim
36 words
A blocking synchronization accordIng to claim 4, characterized in that the synchronizing ring means is maintained in said central position exclusively by the respective interengaging guide surface means at said gear wheel and said synchronizing means.
Claim 8
Dependent Claim
29 words
A blocking synchronization according to claim 4, wherein the guide surface portion of said gear wheel is on a gear rim containing the teeth of said engaging teeth means.
Claim 9
Dependent Claim
24 words
A blocking synchronization accoring to claim 1, wherein tooth tips of said engaging teeth means form the guide surface portion of said gear wheel.
Claim 10
Dependent Claim
52 words
A blocking synchronization according to claim 1, wherein said blocking surface means of said synchronizing ring means includes circumferentially distributed inwardly projected extensions, and wherein said blocking surface means of said engaging teeth means of said gear wheel include apertures in said gear wheel having side wall portions engageable with said extensions.
Claim 11
Dependent Claim
24 words
A blocking synchronization according to claim 9, wherein tooth tips of said engaging teeth means form the guide surface portion of said gear wheel.
Claim 12
Dependent Claim
36 words
A blocking synchronization according to claim 9, characterized in that the synchronizing ring means is maintained in said central position exclusively by the respective interengaging guide surface means at said gear wheel and said synchronizing means.
Claim 13
Dependent Claim
29 words
A blocking synchronization according to claim 9, wherein the guide surface portion of said gear wheel is on a gear rim containing the teeth of said engaging teeth means.
Claim 14
Dependent Claim
29 words
A blocking synchronization according to claim 1, wherein the guide surface portion of said gear wheel is on a gear rim containing the teeth of said engaging teeth means.
Claim 15
Dependent Claim
75 words
A blocking synchronization according to claim 1, wherein a second gear wheel and synchronizing ring means are symmetrically arranged with respect to said first-mentioned gear wheel and ring means at the opposite axial side of said shifting sleeve, said second synchronizing ring means being maintained in a central position with respect to said axis during axial movements thereof by respective interengaging guide surface portions of said second gear wheel and said second synchronizing ring means.
Claim 16
Dependent Claim
29 words
A blocking synchronization according to claim 14, wherein tooth tips of respective ones of said engaging teeth means form the respective guide surface portions for said respective gear wheels.
Claim 17
Dependent Claim
88 words
A blocking synchronization according to claim 14, further comprising a ring spring guided in each of said synchronizing ring means and engaging respectively with a cone surface provided at a respective gear wheel for producing a force at the respective synchronizing ring means directed toward the shifting sleeve, characterized in that at the edge of the cone surface facing the shifting sleeve, a radial shoulder is provided in each of said gear wheels as an abutment for the respective ring spring guided in the respective synchronizing ring means.
Claim 18
Dependent Claim
44 words
A blocking synchronization according to claim 1, wherein said guide surface portions extend parallel to said axis with said guide surface portion of said gear wheel and said guide surface portion of said synchronizing ring means facing one another in respective opposite radial directions.
References Cited (Backward Citations)
US3035674A
Cited
US3175412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |