Patent US3631952A successfully refreshed from Google Patents.
US3631952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral shifting key for a synchronizing transmission
Assignee: Toyota Motor Corp
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Filing: 1970-04-13
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Granted: 1972-01-04
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Expires: 1990-04-13
Abstract
Abstract Change gear synchronizer according to present invention is characterized by axially shifting keys integrally connected together and located between outside of clutch hub and inside surface of clutch hub sleeve. Sleeve is connected to rotate with clutch hub but is arranged to shift axially relative thereto. Integral nature of shifting key assembly prevents individual keys from popping out from between clutch hub and clutch hub sleeve. Integral assembly of shifting keys urges synchronizer ring into frictional contact with rotating gear to thereby provide smooth synchronizing action between rotating gear and clutch hub.
Inventors
- 👤 Hiroshi Sugimoto
- 👤 Mikio Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:51
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/02; F16D23/04; F16D23/06; F16D23/0612; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19284
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
In a change gear comprising a rotating gear and a coaxially disposed rotatable gear, a clutch hub sleeve connected to the roTatable gear for rotation therewith but axially slidable relative thereto, a coaxial rotatable synchronizer ring between the gears connected to rotate with the clutch hub sleeve and the rotatable gear and arranged to transmit the rotational motion of the rotating gear to the rotatable gear when the clutch hub sleeve is axially shifted toward the rotating gear, and an assembly of key elements located on the outside of the rotatable gear between the rotatable gear and the inside of the clutch hub sleeve engaging the synchronizer ring and arranged to move with the clutch hub sleeve whereby axial shifting of the clutch hub sleeve toward the rotating gear causes the assembly of key elements to force the synchronizer ring frictionally against the rotating gear, the improvement comprising an assembly of shifting key elements wherein the individual key elements of the assembly are integrally connected together in continuous unbroken fashion and outwardly spring biased.
Claim 2
Dependent Claim
174 words
In a change gear comprising a rotating gear and a coaxially disposed rotatable gear, a clutch hub sleeve connected to the roTatable gear for rotation therewith but axially slidable relative thereto, a coaxial rotatable synchronizer ring between the gears connected to rotate with the clutch hub sleeve and the rotatable gear and arranged to transmit the rotational motion of the rotating gear to the rotatable gear when the clutch hub sleeve is axially shifted toward the rotating gear, and an assembly of key elements located on the outside of the rotatable gear between the rotatable gear and the inside of the clutch hub sleeve engaging the synchronizer ring and arranged to move with the clutch hub sleeve whereby axial shifting of the clutch hub sleeve toward the rotating gear causes the assembly of key elements to force the synchronizer ring frictionally against the rotating gear, the improvement comprising an assembly of shifting key elements wherein the individual key elements of the assembly are integrally connected together in continuous unbroken fashion and outwardly spring biased.
Claim 3
Dependent Claim
69 words
The combination of claim 1 in which the assembly of shifting key elements includes a circular ring located between the outside of the rotatable gear and the inside of the clutch hub sleeve coaxially disposed relative to the gears, and a plurality of spring members connected to the circular ring and extending radially outwardly therefrom, each spring member connecting one of the shifting key elements to the circular ring.
Claim 4
Dependent Claim
23 words
The combination of claim 2 in which each shifting key element comprises an integral free end portion of one of the spring members.
Claim 5
Dependent Claim
42 words
The combination of claim 1 in which the assembly of shifting key elements includes a circular ring located between the outside of the rotatable gear and the inside of the clutch hub sleeve with the key elements directly connected to the ring.
Claim 6
Dependent Claim
41 words
The combination of claim 4 in which the circular ring has a zigzag configuration constructed and arranged to exert a radially outward spring force on the key elements whereby the elements are urged against the inside of the clutch hub sleeve.
References Cited (Backward Citations)
US2221900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |