Patent US4685344A successfully refreshed from Google Patents.
US4685344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical ball gearing
Assignee: Gebrueder Bode GmbH and Co KG
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Filing: 1985-09-04
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Granted: 1987-08-11
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Expires: 2005-09-04
Abstract
Abstract A helical ball gearing for converting axial or linear motion into rotary motion and vice versa. In a helical ball gearing including a rotor having at least one helical groove, a non-rotatable but axial displaceable shaft having at least one helical groove and being disposed at least partly within the rotor, a plurality of balls disposed in the helical grooves between the rotor and shaft, and a guide for the balls serving as a bearing for the balls, the guide being elastically resilient in the axial direction. The guide thereby allowing the balls to shift axially within the grooves so as to reduce wear on the grooves. The guide may be a helical spring.
Inventors
- 👤 Manfred Horn
- 👤 Franz Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:52
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/22; F16H25/2204; F16H25/2233; E; E05; E05F; E05F15/00; E05F15/50; E05F15/53; E05F15/54; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/51; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19721; Y10T74/1973; Y10T74/19744; Y10T74/19781; Y10T74/19786
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
In a helical ball gearing for converting an axial motion into rotary motion and vice versa, of the type including a rotor having at least one helical groove, a non-rotatable, but axially displaceable shaft having at least one helical groove and being disposed at least partly within the rotor, a plurality of balls disposed in the helical grooves between the rotor and shaft, and a guide for the balls serving as a bearing for the balls, the improvement comprising: said guide being a helical spring elastically resilient in the axial direction, said helical spring having a clockwise direction of spiral and said grooves having a counterclockwise direction of spiral as viewed from the same direction, thereby allowing the balls to shift axially within the grooves so as to reduce wear on the grooves.
Claim 2
Dependent Claim
133 words
In a helical ball gearing for converting an axial motion into rotary motion and vice versa, of the type including a rotor having at least one helical groove, a non-rotatable, but axially displaceable shaft having at least one helical groove and being disposed at least partly within the rotor, a plurality of balls disposed in the helical grooves between the rotor and shaft, and a guide for the balls serving as a bearing for the balls, the improvement comprising: said guide being a helical spring elastically resilient in the axial direction, said helical spring having a clockwise direction of spiral and said grooves having a counterclockwise direction of spiral as viewed from the same direction, thereby allowing the balls to shift axially within the grooves so as to reduce wear on the grooves.
Claim 3
Dependent Claim
133 words
In a helical ball gearing for converting an axial motion into rotary motion and vice versa, of the type including a rotor having at least one helical groove, a non-rotatable, but axially displaceable shaft having at least one helical groove and being disposed at least partly within the rotor, a plurality of balls disposed in the helical grooves between the rotor and shaft, and a guide for the balls serving as a bearing for the balls, the improvement comprising: said guide being a helical spring elastically resilient in the axial direction, said helical spring having a counterclockwise direction of spiral and said grooves having a clockwise direction of spiral as viewed from the same direction, thereby allowing the balls to shift axially within the grooves so as to reduce wear on the grooves.
Claim 4
Dependent Claim
133 words
In a helical ball gearing for converting an axial motion into rotary motion and vice versa, of the type including a rotor having at least one helical groove, a non-rotatable, but axially displaceable shaft having at least one helical groove and being disposed at least partly within the rotor, a plurality of balls disposed in the helical grooves between the rotor and shaft, and a guide for the balls serving as a bearing for the balls, the improvement comprising: said guide being a helical spring elastically resilient in the axial direction, said helical spring having a counterclockwise direction of spiral and said grooves having a clockwise direction of spiral as viewed from the same direction, thereby allowing the balls to shift axially within the grooves so as to reduce wear on the grooves.
Claim 5
Dependent Claim
138 words
In a helical ball gearing for converting an axial motion into rotary motion and vice versa, of the type including a rotor having at least one helical groove, a non-rotatable, but axially displaceable shaft having at least one helical groove and being disposed at least partly within the rotor, a plurality of balls disposed in the helical grooves between the rotor and shaft, and a guide for the balls serving as a bearing for the balls, the improvement comprising: said guide being elastically resilient in the axial direction, thereby allowing the balls to shift axially within the grooves so as to reduce wear on the grooves, and two springs disposed on opposite ends of said guide for operation in a horizontal position of the helical ball gearing so as to support said guide in position along the shaft.
Claim 6
Dependent Claim
138 words
In a helical ball gearing for converting an axial motion into rotary motion and vice versa, of the type including a rotor having at least one helical groove, a non-rotatable, but axially displaceable shaft having at least one helical groove and being disposed at least partly within the rotor, a plurality of balls disposed in the helical grooves between the rotor and shaft, and a guide for the balls serving as a bearing for the balls, the improvement comprising: said guide being elastically resilient in the axial direction, thereby allowing the balls to shift axially within the grooves so as to reduce wear on the grooves, and two springs disposed on opposite ends of said guide for operation in a horizontal position of the helical ball gearing so as to support said guide in position along the shaft.
Claim 7
Dependent Claim
15 words
The helical ball gearing as defined in claim 3, wherein said springs are helical springs.
Claim 8
Dependent Claim
17 words
The helical ball gearing as defined in claim 3, wherein said springs are secured into the rotor.
References Cited (Backward Citations)
CA700304A
Cited
US2076180A
Cited
DE1128714B
Cited
DE1777001A1
Cited
SU720148A2
Cited
JPS54120366A
Cited
US4343200A
Cited
DE3323347A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |