US3768326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthogonal skew-axis gearing
Assignee: Individual
•
Filing: 1971-12-16
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Granted: 1973-10-30
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Expires: 1991-12-16
Abstract
Abstract A skew-axis gearing which consists of a cylindrical worm and a flat worm wheel, which interengage beyond a plane passing through the wheel axis, normal; to the worm axis. To achieve elevated load capacity of this gearing in its action by either side of the worm threads, the profile of the latter is made curved.
Inventors
- 👤 A Georgiev
- 👤 V Goldfarb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:09
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/04; F16H1/12; F16H1/14; F16H1/145; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19828; Y10T74/19949; Y10T74/19953; Y10T74/19958
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
An orthogonal slew-axis gearing, comprising a flat toothed wheel and a cylindrical threaded worm, the latter being displaced along its axis from the axial plane of said wheel, which plane is perpendicular to said worm axis, the teeth of said wheel mating with the thread convolutions said worm, the side surfaces of said convolutions facing the axis of said wheel and having in the normal section a concave side profile, the other side surfaces of said convolutions having in the normal section a convex side profile, said convolutions having a constant axial lead determined in accordance with the formula
Claim 2
Dependent Claim
99 words
An orthogonal slew-axis gearing, comprising a flat toothed wheel and a cylindrical threaded worm, the latter being displaced along its axis from the axial plane of said wheel, which plane is perpendicular to said worm axis, the teeth of said wheel mating with the thread convolutions said worm, the side surfaces of said convolutions facing the axis of said wheel and having in the normal section a concave side profile, the other side surfaces of said convolutions having in the normal section a convex side profile, said convolutions having a constant axial lead determined in accordance with the formula
Claim 3
Dependent Claim
128 words
The gearing as defined in claim 1, wherein the tangent to said concave profile forms an angle within 5* and 20* with a plane which is perpendicular to said worm axis, at the points of intersection of said concave profile with the mid-cylinder of said worm; the tangent to said concave profile forms an angle within 0* and 10* with said perpendicular plane, at the points of intersection of said concave profile with the outer cylinder of said worm; the center of curvature of said concave profile is disposed beyond said mid-cylinder at said points of intersection with the same; and the radius of curvature of said concave profile is within 0.5d1 and 2d1 at the same points of intersection, wherein d1 is the diameter of said mid-cylinder.
Claim 4
Dependent Claim
128 words
The gearing as defined in claim 1, wherein the tangent to said convex profile forms an angle within 20* and 35* with a plane which is perpendicular to said worm axis, at the points of intersection of said convex profile with the mid-cylinder of said worm; the tangent to said convex profile forms an angle within 30* and 50* with said perpendicular plane, at the points of intersection of said convex profile with the outer cylinder of said worm; the center of curvature of said convex profile is disposed inside said mid-cylinder at said points of intersection with the same; and the radius of curvature of said convex profile is within 0.5d1 and 1.5d1 at the same points of intersection, wherein d1 is the diameter of said mid-cylinder.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |