US3799004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Change speed power transmission
Assignee: Motors Liquidation Co
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Filing: 1972-06-26
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Granted: 1974-03-26
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Expires: 1992-06-26
Abstract
Abstract Change speed transmission having separate clutches selectively applied by hydraulically operated nested pistons disposed within a rotatable drum that can be braked to provide reaction for transmission planetary gearing. A one way brake engages to directly connect a reaction member of the gearing to the braked drum for low range operation. By applying a first one of the clutches there is a shift off of the one way brake to establish an intermediate range. Both clutches are applied as the drum is released for rotation in direct drive.
Inventors
- 👤 G Hause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:33
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/3023; F16H63/3026; F16H3/00; F16H3/44; F16H3/62; F16H3/66
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
308 words
A power transmission having input and output means, first and second planetary gear units operatively disposed in said transmission connecting said input means to said output means, each of said gear units comprising sun and ring gear means operatively connected by planet gear means and a carrier for said planet gear means, a clutching unit operatively disposed in said transmission, said clutching unit comprising a drum, support means operatively disposed within said transmission for supporting said drum for rotation therein, said drum having concentric first and second clutches operatively mounted therein, first motor means operatively mounted in said drum for engaging a first of said clutches, one-way brake means operatively connected to said first and second planetary gear units providing a one-way driving connection between said planetary gear units and said drum, said one-way brake means having an outer race operatively connected to said drum and to said first of said clutches and an inner race operatively connected to said carrier means of said first planetary gear unit and to said sun gear of said second planetary gear unit, selectively engageable brake means operatively disposed in said transmission radially outwardly from said drum and directly engageable therewith to hold said drum from rotation so that said one-way brake can automatically engage to condition said second planetary gear unit means for a low speed drive and so that said first clutch can be subsequently engaged by said first motor means to condition said second gear unit for a reduction ratio drive so that said gear units shift off of said one-way brake into an intermediate speed drive, and second motor means for housing said first motor means and for engaging said second clutch to condition said gear unit for direct drive wheN said first clutch is also engaged and said brake means is moved from engagement with said drum.
Claim 2
Dependent Claim
308 words
A power transmission having input and output means, first and second planetary gear units operatively disposed in said transmission connecting said input means to said output means, each of said gear units comprising sun and ring gear means operatively connected by planet gear means and a carrier for said planet gear means, a clutching unit operatively disposed in said transmission, said clutching unit comprising a drum, support means operatively disposed within said transmission for supporting said drum for rotation therein, said drum having concentric first and second clutches operatively mounted therein, first motor means operatively mounted in said drum for engaging a first of said clutches, one-way brake means operatively connected to said first and second planetary gear units providing a one-way driving connection between said planetary gear units and said drum, said one-way brake means having an outer race operatively connected to said drum and to said first of said clutches and an inner race operatively connected to said carrier means of said first planetary gear unit and to said sun gear of said second planetary gear unit, selectively engageable brake means operatively disposed in said transmission radially outwardly from said drum and directly engageable therewith to hold said drum from rotation so that said one-way brake can automatically engage to condition said second planetary gear unit means for a low speed drive and so that said first clutch can be subsequently engaged by said first motor means to condition said second gear unit for a reduction ratio drive so that said gear units shift off of said one-way brake into an intermediate speed drive, and second motor means for housing said first motor means and for engaging said second clutch to condition said gear unit for direct drive wheN said first clutch is also engaged and said brake means is moved from engagement with said drum.
Claim 3
Dependent Claim
262 words
A power transmission comprising input and output means, planetary gear unit means operatively connecting said input means to said output means, said planetary gear unit means comprising first and second operatively connected planetary gear sets, a clutch unit operatively disposed in said transmission, said clutch unit having an annular drum with an interior and axially-extending sleeve portion, support means fitting within said interior sleeve portion for supporting said drum for rotation in said transmission, first and second separate clutch means operatively disposed in said drum, first motor means movably mounted in said drum for effecting the engagement of a first of said clutch means, one-way brake means providing a one-way driving connection between said planetary gear unit means and said drum, said one-way brake means having an outer race drivingly connected to said sleeve portion and an inner race operatively connected to said first planetary gear set, selectively-engageable brake means disposed externally of said drum and operatively engageable therewith to hold said drum from rotation so that said one-way brake means can automatically engage and condition said gear unit for a low speed drive and so that said first clutch means can be subsequently engaged to condition said gear unit for a shift off of said one-way brake means into an intermediate speed drive, and second motor means disposed within said drum for housing said first motor means and for engaging said second clutch means to condition said gear unit for direct drive when said clutch means is also engaged and said brake means is moved from braking engagement with said drum.
Claim 4
Dependent Claim
262 words
A power transmission comprising input and output means, planetary gear unit means operatively connecting said input means to said output means, said planetary gear unit means comprising first and second operatively connected planetary gear sets, a clutch unit operatively disposed in said transmission, said clutch unit having an annular drum with an interior and axially-extending sleeve portion, support means fitting within said interior sleeve portion for supporting said drum for rotation in said transmission, first and second separate clutch means operatively disposed in said drum, first motor means movably mounted in said drum for effecting the engagement of a first of said clutch means, one-way brake means providing a one-way driving connection between said planetary gear unit means and said drum, said one-way brake means having an outer race drivingly connected to said sleeve portion and an inner race operatively connected to said first planetary gear set, selectively-engageable brake means disposed externally of said drum and operatively engageable therewith to hold said drum from rotation so that said one-way brake means can automatically engage and condition said gear unit for a low speed drive and so that said first clutch means can be subsequently engaged to condition said gear unit for a shift off of said one-way brake means into an intermediate speed drive, and second motor means disposed within said drum for housing said first motor means and for engaging said second clutch means to condition said gear unit for direct drive when said clutch means is also engaged and said brake means is moved from braking engagement with said drum.
Claim 5
Dependent Claim
229 words
A power transmission having input and output means, planetary gear unit means operatively connecting said input means to said output means, a clutching unit operatively disposed in said transmission, said clutching unit comprising a rotatable drum, concentrically disposed first and second selectively-engageable clutches housed within said rotatable drum, first motor means for said first clutch, first brake means operatively disposed adjacent to said drum and selectively engageable with said drum to hold said drum from rotation, one-way brake means operatively connecting said drum directly to said gear unit means for automatically conditioning said gear unit means for low range drive when said first brake means is engaged with said drum and for overrunning in response to the engagement of said first clutch to condition said gear unit means for an intermediate speed ratio, said one-way brake means having an outer race supporting said first clutch in said housing concentric with said second clutch and said drum having a second motor means for housing said first motor means and for engaging said second clutch to condition said gear unit means for a direct drive ratio when said first clutch is engaged and when said first brake means is released and further to condition said gear unit means for a back drive from said output means to said input means when only said second clutch and said first brake are engaged.
Claim 6
Dependent Claim
229 words
A power transmission having input and output means, planetary gear unit means operatively connecting said input means to said output means, a clutching unit operatively disposed in said transmission, said clutching unit comprising a rotatable drum, concentrically disposed first and second selectively-engageable clutches housed within said rotatable drum, first motor means for said first clutch, first brake means operatively disposed adjacent to said drum and selectively engageable with said drum to hold said drum from rotation, one-way brake means operatively connecting said drum directly to said gear unit means for automatically conditioning said gear unit means for low range drive when said first brake means is engaged with said drum and for overrunning in response to the engagement of said first clutch to condition said gear unit means for an intermediate speed ratio, said one-way brake means having an outer race supporting said first clutch in said housing concentric with said second clutch and said drum having a second motor means for housing said first motor means and for engaging said second clutch to condition said gear unit means for a direct drive ratio when said first clutch is engaged and when said first brake means is released and further to condition said gear unit means for a back drive from said output means to said input means when only said second clutch and said first brake are engaged.
Claim 7
Dependent Claim
107 words
The power transmission defined in claim 3, said one-way brake means having rotatable inner and outer races and having one-way connector means for drivingly connecting said races together only subsequent to the relative rotation of said races in a first direction, said planetary gear unit means having first and second planetary gear sets, one of said planetary gear sets having a carrier assembly operatively connected to a sun gear of the other of said planetary gear sets, first connecting means drivingly connecting said outer race to said drum, and second connecting means drivingly connecting said inner race to said carrier assembly and thereby to said sun gear.
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |