US3850046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball nut screw
Assignee: SKF Industrial Trading and Development Co BV
•
Filing: 1973-04-05
•
Granted: 1974-11-26
•
Expires: 1993-04-05
Abstract
Abstract A ball nut screw assembly comprising a screw member, a nut member circumscribing said screw member, means defining a ball path between said screw and nut members, balls engageable in said ball path, means defining a groove in the outer peripheral surface of said nut member terminating at opposite ends in bores communicating with said ball path, a recirculation member including an elongated roof shaped portion completely recessed in said groove and forming therewith a recirculation channel and cyclindrical portions at opposite ends of said roof shaped portion engageable in said bores and extending towards said ball path, and means integral with said nut member for securing said recirculation member to said nut member.
Inventors
- 👤 S Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:36
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/22; F16H25/2204; F16H25/2214; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19744; Y10T74/19749; Y10T74/19767; Y10T74/19772
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
A ball nut screw assembly comprising a screw member, a nut member circumscribing said screw member, means defining a ball path between said screw and nut members, balls engageable in said ball path, means defining a groove in the outer peripheral surface of said nut member terminating at opposite ends in bores communicating with said ball path, a recirculation member including an elongated roof shaped portion completely recessed in said groove and forming therewith a recirculation channel and cylindrical portions at opposite ends of said roof shaped portion engage able in said bores and extending towards said ball path, and means integral with said nut member for securing said recirculation member to said nut member.
Claim 2
Dependent Claim
115 words
A ball nut screw assembly comprising a screw member, a nut member circumscribing said screw member, means defining a ball path between said screw and nut members, balls engageable in said ball path, means defining a groove in the outer peripheral surface of said nut member terminating at opposite ends in bores communicating with said ball path, a recirculation member including an elongated roof shaped portion completely recessed in said groove and forming therewith a recirculation channel and cylindrical portions at opposite ends of said roof shaped portion engage able in said bores and extending towards said ball path, and means integral with said nut member for securing said recirculation member to said nut member.
Claim 3
Dependent Claim
48 words
A ball nut screw assembly as claimed in claim 1 wherein each of said generally cylindrical portions at opposite ends of said roof shaped portion includes a deflection tongue at its outer extremeties projecting into the ball path operable to facilitate recirculation of the balls through said channel.
Claim 4
Dependent Claim
51 words
A ball nut screw assembly as claimed in claim 1 wherein the recirculation member is secured to said nut member by upsetting a portion of the side wall defining said groove to engage the outer surface of said roof shaped portion at least at two locations adjacent opposite side edges thereof.
Claim 5
Dependent Claim
37 words
A ball nut screw assembly as claimed in claim 1 wherein the recirculation member is of one piece construction formed of a pressed steel strip to a shape defining said roof shaped portion and generally cylindrical portions.
Claim 6
Dependent Claim
43 words
A ball nut screw assembly as claimed in claim 1 wherein said roof shaped portion is of arcuate cross section and wherein said groove is a stepped configuration defining a shoulder against which the side edge portions of the roof shaped portion seats.
Claim 7
Dependent Claim
46 words
A ball nut screw assembly as claimed in claim 1 wherein said nut member is provided with means for mounting it against rotation about its axis and also force transmitting by recesses in the outer periphery of the nut poRtion in which mounting means are engaged.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |