US3597990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zero-lash right-angle movement
Assignee: Individual
•
Filing: 1970-05-01
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Granted: 1971-08-10
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Expires: 1990-05-01
Abstract
Abstract A right angle mechanical power transfer apparatus for transmitting a force from its input to its output consisting of an input rotary member having a contoured thread which is in engagement with an output rotary member having a plurality of offset rotatable members which engage opposite sides of the thread in order to eliminate side motion play or backlash.
Inventors
- 👤 Joseph P Mccartin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:06
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/10; F16H1/00; F16H1/02; F16H1/04; F16H1/12; F16H1/16; F16H1/166; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19623; Y10T74/19642; Y10T74/19647; Y10T74/19651; Y10T74/19656; Y10T74/19698; Y10T74/19828; Y10T74/19949; Y10T74/19953; Y10T74/19963; Y10T74/19972; Y10T74/19977
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
86 words
A right-angle movement apparatus for transmitting a predetermined ratio of force from its output with respect to its input comprising, a rotary input member having a circular concave surface, a circularly concave thread formed integrally into said surface defining a groove, an output rotary member, and a plurality of thread followers retained in radially spacedapart relationship on the periphery of said rotary output member, the axes of adjacent pairs of thread followers being shifted toward each other for engagement to the opposite sides of said thread.
Claim 2
Dependent Claim
86 words
A right-angle movement apparatus for transmitting a predetermined ratio of force from its output with respect to its input comprising, a rotary input member having a circular concave surface, a circularly concave thread formed integrally into said surface defining a groove, an output rotary member, and a plurality of thread followers retained in radially spacedapart relationship on the periphery of said rotary output member, the axes of adjacent pairs of thread followers being shifted toward each other for engagement to the opposite sides of said thread.
Claim 3
Dependent Claim
19 words
The right-angle movement apparatus as recited in claim 1 wherein said rotary input member comprises a concave spiral thread.
Claim 4
Dependent Claim
26 words
The right-angle movement apparatus as recited in claim 1 wherein said rotary input member comprises an indexing device having a spiral thread including an indexing transition.
Claim 5
Dependent Claim
27 words
The right-angle movement apparatus as recited in claim 1 wherein the axis of said input member is perpendicular to the axis of rotation of said output member.
Claim 6
Dependent Claim
33 words
The right-angle movement apparatus as recited in claim 1 wherein the locus of the axis of the circular concave surface of said input member is coaxial with the axis of said output member.
Claim 7
Dependent Claim
23 words
The right-angle movement apparatus as recited in claim 1 wherein said thread followers additionally comprise frictionless bearings for engagement with the thread surface.
Claim 8
Dependent Claim
29 words
The right-angle movement apparatus as recited in claim 1 wherein the axes of said threaD followers are disposed along the same plane as the axis of said input member.
Claim 9
Dependent Claim
27 words
The right-angle movement apparatus as recited in claim 1 wherein the offset axes of said thread followers intersect around the axis of rotation of said output member.
Claim 10
Dependent Claim
35 words
The right-angle movement apparatus as recited in claim 8 wherein each of said offset axes of said followers is parallel to the corresponding radial axes converging on the axis of rotation of said output member.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |