US3848476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traction roller transmission
Assignee: Excelermatic Inc
•
Filing: 1973-06-05
•
Granted: 1974-11-19
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Expires: 1993-06-05
Abstract
Abstract A traction roller transmission having traction rollers arranged in the annular space between a traction ring and a sun roller disposed in the traction ring. The traction rollers are in frictional engagement with the sun roller and the traction ring for the transmission of power therebetween and have lines of contact with the traction ring which are shorter than the lines of contact with the sun roller.
Inventors
- 👤 C Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:20
CPC Classifications
F; F16; F16H; F16H13/00; F16H13/02; F16H13/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
146 words
A traction roller transmission comprising a rotatable means having a circular race; a first roller having a circumferential race and being disposed relative to said rotatable means such that a space is formed between the races of the rotatable means and the first roller, and at least one motion transmitting traction roller rotatably supported in said space with its circumferential face in frictional engagement with the circumferential race of said first roller along a first line of contact and with the circular race of said rotatable means along a second line of contact for transmitting motion between the first roller and the rotatable means, said circumferential face and said circumferential race having a difference in curvature which is larger than the difference in curvature between said circumferential face and said circular race, and said second line of contact being shorter than said first line of contact.
Claim 2
Dependent Claim
146 words
A traction roller transmission comprising a rotatable means having a circular race; a first roller having a circumferential race and being disposed relative to said rotatable means such that a space is formed between the races of the rotatable means and the first roller, and at least one motion transmitting traction roller rotatably supported in said space with its circumferential face in frictional engagement with the circumferential race of said first roller along a first line of contact and with the circular race of said rotatable means along a second line of contact for transmitting motion between the first roller and the rotatable means, said circumferential face and said circumferential race having a difference in curvature which is larger than the difference in curvature between said circumferential face and said circular race, and said second line of contact being shorter than said first line of contact.
Claim 3
Dependent Claim
36 words
A traction roller transmission as recited in claim 1, wherein said circular race is the inner surface of a traction ring having a race area of a width smaller than the width of the traction rollers.
Claim 4
Dependent Claim
43 words
A traction roller transmission as recited in claim 2, wherein an annular groove is formed centrally in the traction ring to divide the inner surface of the traction ring into two spaced races in contact with axially outer areas of the traction rollers.
Claim 5
Dependent Claim
27 words
A traction roller transmission as recited in claim 3, wherein said two spaced races are formed by two spaced race rings forming part of said traction ring.
Claim 6
Dependent Claim
57 words
A traction roller transmission as recited in claim 3, wherein said first roller has annular grooves formed in the areas adjacent those areas of the traction rollers which are in contact with the traction ring races such that the first roller surface and the traction ring races are in contact with different areas of the traction rollers.
Claim 7
Dependent Claim
155 words
A traction roller transmission comprising input nd output shafts; a traction ring associated with one of said shafts for rotation therewith; a sun roller carried by the other of said shafts and disposed within said traction ring with its axis parallel to, but displaced from, the axis of said traction ring thereby to form an annular path of varying radial width between the sun roller and the traction ring; and a number of motion transmistting traction rollers disposed in said annular path in annuLarly spaced relationship, at least one of said rollers being free to be pulled into a narrowing section of said annular path to cause firm engagement of said traction rollers with said sun roller and said traction ring, said traction rollers being in engagement with said sun roller along first lines of contact and with said traction ring along second lines of contact which are shorter than said first lines of contact.
Claim 8
Dependent Claim
155 words
A traction roller transmission comprising input nd output shafts; a traction ring associated with one of said shafts for rotation therewith; a sun roller carried by the other of said shafts and disposed within said traction ring with its axis parallel to, but displaced from, the axis of said traction ring thereby to form an annular path of varying radial width between the sun roller and the traction ring; and a number of motion transmistting traction rollers disposed in said annular path in annuLarly spaced relationship, at least one of said rollers being free to be pulled into a narrowing section of said annular path to cause firm engagement of said traction rollers with said sun roller and said traction ring, said traction rollers being in engagement with said sun roller along first lines of contact and with said traction ring along second lines of contact which are shorter than said first lines of contact.
Claim 9
Dependent Claim
29 words
A traction roller transmission as recited in claim 6, wherein said traction ring has an annular race area of a width smaller than the width of the traction rollers.
Claim 10
Dependent Claim
43 words
A traction roller transmission as recited in claim 6, wherein an annular groove is formed centrally in the traction ring to divide the inner surface of the traction ring into two spaced races in contact with axially outer areas of the traction rollers.
Claim 11
Dependent Claim
27 words
A traction roller transmission as recited in claim 8, wherein said two spaced races are formed by two spaced race rings forming part of said traction ring.
Claim 12
Dependent Claim
56 words
A traction roller transmission as recited in claim 6, wherein said sun roller has annular grooves formed in the areas adjacent those areas of traction rollers which are in contact with the traction ring races such that the sun roller surface and the traction ring races are in contact with different areas of the traction rollers.
Claim 13
Dependent Claim
31 words
A traction roller transmission as recited in claim 6, wherein said second line of contact is at least as long as said first line of contact divided by the transmission ratio.
Claim 14
Dependent Claim
33 words
A traction roller transmission as recited in claim 11, wherein the length of said second line of contact is about 120 percent of said first line of contact divided by the transmission ratio.
References Cited (Backward Citations)
US1106246A
Cited
US2815685A
Cited
US2765665A
Cited
US2850338A
Cited
US3380312A
Cited
US3475993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |