Patent US3695119A successfully refreshed from Google Patents.
US3695119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Worm drive with cylindrical worm
Assignee: HERBERT LIDNER GmbH
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Filing: 1970-09-28
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Granted: 1972-10-03
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Expires: 1990-09-28
Abstract
Abstract A worm drive is formed of a cylindrical worm which meshes with a worm wheel, and the cylindrical worm has cycloidally shaped flanks. The combined configurations of the worm and worm wheel provides two lines of contact between their corresponding flanks when they are in meshed engagement.
Inventors
- 👤 Gerhard Stade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:05
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/08; F16H55/0853; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19828; Y10T74/19842; Y10T74/19991; Y10T74/19995
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
39 words
A worm drive comprising a cylindrical worm and a worm wheel, said cylindrical worm having cycloidally shaped flank surfaces, said worm wheel having teeth with flanks shaped in correspondence with the flanks on said worm for meshed engagement therewith.
Claim 2
Dependent Claim
39 words
A worm drive comprising a cylindrical worm and a worm wheel, said cylindrical worm having cycloidally shaped flank surfaces, said worm wheel having teeth with flanks shaped in correspondence with the flanks on said worm for meshed engagement therewith.
Claim 3
Dependent Claim
31 words
A worm drive, according to claim 1, wherein the pitch line of said worm coincides with a line extending in an axial direction along the exterior circumferential surface of said worm.
Claim 4
Dependent Claim
88 words
A worm drive comprising a cylindrical worm and a worm wheel, said cylindrical worm having cycloidally shaped flank surfaces, said worm wheel having teeth with flanks shaped in correspondence with the flanks on said worm for meshed engagement therewith, said worm wheel flaNks and said worm flanks being in contact along two lines of contact when in meshed engagement for transmitting torque between said worm and said worm wheel, and at least one oil chamber being formed between said worm and said worm wheel for developing hydrodynamic lubrication.
Claim 5
Dependent Claim
88 words
A worm drive comprising a cylindrical worm and a worm wheel, said cylindrical worm having cycloidally shaped flank surfaces, said worm wheel having teeth with flanks shaped in correspondence with the flanks on said worm for meshed engagement therewith, said worm wheel flaNks and said worm flanks being in contact along two lines of contact when in meshed engagement for transmitting torque between said worm and said worm wheel, and at least one oil chamber being formed between said worm and said worm wheel for developing hydrodynamic lubrication.
References Cited (Backward Citations)
US2143921A
Cited
US3516298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |