Patent US3495064A successfully refreshed from Google Patents.
Patent US3596524A successfully refreshed from Google Patents.
US3596524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine accessory drive system
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1970-01-20
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Granted: 1971-08-03
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Expires: 1990-01-20
Abstract
Abstract Efficient operation of vehicle power source or engine accessories over a smaller and more compatible speed range i.e., at a higher speed than the speed of the power source when the power source is at low speed and a lower speed than the power source when the power source is at high speed, is made possible by an accessory drive system which includes the power source interconnected between a first gear means and a second gear means wherein the second gear means serves to rotate a drive shaft at a speed which will usually be different from the power source and wherein the first or planetary gear means includes first, second and third elements with the power source being directly connected to the first or planet carrier element, the second drive shaft being connected to the second or sun gear element by means of a power transmitting assembly and the accessory power takeoff means cooperating with the third or ring gear element.
Inventors
- 👤 Harvey A Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:14
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
An engine accessory drive system comprising a power source interposed and connected between a first gear means and a second gear means, and a power transmitting assembly connected between said first and second gear means whereby an accessory power takeoff cooperating with said first gear means will have a range of speed intermediate the range of speeds of said power source.
Claim 2
Dependent Claim
61 words
An engine accessory drive system comprising a power source interposed and connected between a first gear means and a second gear means, and a power transmitting assembly connected between said first and second gear means whereby an accessory power takeoff cooperating with said first gear means will have a range of speed intermediate the range of speeds of said power source.
Claim 3
Dependent Claim
110 words
An engine accessory drive system according to claim 1 wherein said second gear means includes a second drive shaft means, and wherein said second gear means is adapted to increase said second drive shaft speed in a direct line arithmetic progression while said power source speed varies over a range of speeds, said power transmitting assembly cooperating with said second drive shaft means to transmit power to said first gear means, said first gear means being adapted to transmit a higher speed than said power source when said power source is at low speed and being adapted to transmit a lower speed when said power source is at high speed.
Claim 4
Dependent Claim
69 words
An engine accessory drive shaft according to claim 2 wherein said first gear means includes a planetary gear arrangement having first, second and third elements and wherein said power source is directly connected to said first element through a first drive shaft of said first gear means and indirectly connected to said second element through said power transmitting assembly whereby said accessory power takeoff cooperates with said third element.
Claim 5
Dependent Claim
32 words
An engine accessory drive shaft according to claim 3 wherein said first element is a planet carrier, said second element is a sun gear and said third element is an internal gear.
Claim 6
Dependent Claim
48 words
An engine accessory drive shaft according to claim 2 wherein said power transmitting assembly includes a bypass shaft which is coupled at a first end to the said second drive shaft in a 1-1 relation and which is coupled at a second end to said first gear means.
Claim 7
Dependent Claim
179 words
An engine accessory drive system for reducing the range of speed of an accessory power takeoff as compared to the range of speed of a power source comprising a power source having a first and second drive shaft means connected therewith, said power source being capable of transmitting rotary movement over a range of speeds to said first and second drive shaft means, a first gear means including first, second and third elements, said first drive shaft means being connected between said power source and said first element of said first gear means, a second gear means interposed between said power source and said second drive shaft means whereby said first and second drive shaft means may rotate at different speeds for a single engine speed, an accessory power takeoff means cooperating with said Third element of said first gear means, a power transmitting assembly connected between said second drive shaft means and said second element of said first gear means whereby the range of speed of said accessory takeoff is intermediate the range of speed of said engine.
Claim 8
Dependent Claim
179 words
An engine accessory drive system for reducing the range of speed of an accessory power takeoff as compared to the range of speed of a power source comprising a power source having a first and second drive shaft means connected therewith, said power source being capable of transmitting rotary movement over a range of speeds to said first and second drive shaft means, a first gear means including first, second and third elements, said first drive shaft means being connected between said power source and said first element of said first gear means, a second gear means interposed between said power source and said second drive shaft means whereby said first and second drive shaft means may rotate at different speeds for a single engine speed, an accessory power takeoff means cooperating with said Third element of said first gear means, a power transmitting assembly connected between said second drive shaft means and said second element of said first gear means whereby the range of speed of said accessory takeoff is intermediate the range of speed of said engine.
Claim 9
Dependent Claim
38 words
An engine accessory drive shaft according to claim 6 wherein said first element of said first gear means is a planet gear carrier, said second element is a sun gear and said third element is an internal gear.
Claim 10
Dependent Claim
124 words
An engine accessory drive shaft according to claim 7 wherein said first drive shaft is directly connected in a 1:1 ratio to said first element wherein the ratio of the outside diameter of said sun gear to the inside diameter of said internal gear is 1: 2, and wherein the drive speed ratio of said sun gear to said second drive shaft speed is 1.5:1 so that said internal gear third element rotates at a higher speed than said power source when the ratio of speed of said power source to said second drive shaft is greater than 1:1.5 and rotates slower than said power source when the ratio of speed of said power source to said second drive shaft is less than 1:1.5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |