Patent US2831848A successfully refreshed from Google Patents.
US3752276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronization devices
Assignee: David Brown Corp PLC
•
Filing: 1971-12-03
•
Granted: 1973-08-14
•
Expires: 1991-12-03
Abstract
Abstract A synchronization device associated with a dog clutch for selectively connecting either of two rotating driving members to a rotatable driven shaft comprises a sleeve moveable axially upon the slidable toothed member of the dog clutch and having friction cones at its ends engageable alternatively with respective mating surfaces on the driving members, at least one longitudinallyextending slot of cranked shape forming inclined baulking surfaces in the sleeve, and a cylindrical pin passing through said slot and engaging at its radially inner end in a hole in said slidable toothed member and at its outer end in a hole in a ring slidable axially on the sleeve by a selector fork of a gear shift mechanism.
Inventors
- 👤 D Hoyle
- 👤 E Whateley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:23
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/02; F16D23/04; F16D23/06; F16D23/0612
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
153 words
A synchronization device comprising a slidable clutch member having internal clutch teeth, a synchronizing sleeve surrounding and relatively longitudinally displaceable relative to said clutch member and having a friction cone at each of its ends and at least one longitudinally extending slot of cranked shape, the end portions of the slot being both parallel to the axis of the sleeve but circumferentially offset from one another and being joined by an inclined portion which forms baulking surfaces, an actuator movable longitudinally of said sleeve and mounting a pin extending through said slot into motion transmitting engagement with said clutch member, means providing three axially spaced annuar grooves in the bore of said sleeve, and at least one spring loaded ball housed on said clutch member adapted for selective engagement in one of said grooves for releasably interconnecting said clutch member and sleeve in relatively displaced positions of said clutch member along said sleeve.
Claim 2
Dependent Claim
153 words
A synchronization device comprising a slidable clutch member having internal clutch teeth, a synchronizing sleeve surrounding and relatively longitudinally displaceable relative to said clutch member and having a friction cone at each of its ends and at least one longitudinally extending slot of cranked shape, the end portions of the slot being both parallel to the axis of the sleeve but circumferentially offset from one another and being joined by an inclined portion which forms baulking surfaces, an actuator movable longitudinally of said sleeve and mounting a pin extending through said slot into motion transmitting engagement with said clutch member, means providing three axially spaced annuar grooves in the bore of said sleeve, and at least one spring loaded ball housed on said clutch member adapted for selective engagement in one of said grooves for releasably interconnecting said clutch member and sleeve in relatively displaced positions of said clutch member along said sleeve.
Claim 3
Dependent Claim
20 words
A synchronization device according to claim 1, wherein the opposite sides of the inclined portion are inclined at different angles.
Claim 4
Dependent Claim
35 words
A synchronization device according to claim 1, wherein said sleeve has a plurality of slots spaced angularly as nearly equally apart as possible but aligned with respective gaps between said teeth on the clutch member.
Claim 5
Dependent Claim
31 words
A synchronization device as defined in claim 1, wherein said inclined portion of said slot is located at the intersection of said slot with the central one of said three grooves.
References Cited (Backward Citations)
US1886850A
Cited
US2131199A
Cited
FR752115A
Cited
US2238370A
Cited
US2175911A
Cited
US2245816A
Cited
US2369843A
Cited
US2376512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |