Patent US3767955A successfully refreshed from Google Patents.
Patent US3851541A successfully refreshed from Google Patents.
US3851541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential ball nut assembly
Assignee: Dana Inc
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Filing: 1973-11-15
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Granted: 1974-12-03
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Expires: 1993-11-15
Abstract
Abstract Two ball nuts are preloaded onto a screw and may be selectively rotated through differential distances to enable the degree of preloading to be changed in small steps. The nuts are normally locked against relative rotation by a ring which permits differential rotation of the nuts without need of removing either nut from the screw.
Inventors
- 👤 H Ploss
- 👤 H Hildebrandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:08
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/22; F16H25/2204; F16H25/2209; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18728; Y10T74/19; Y10T74/1987; Y10T74/19893; Y10T74/19898; Y10T74/19902
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
A ball nut assembly comprising first and second axially alined nuts, a connector ring telescoped into said nuts and spanning the joint between the nuts, first and second axially spaced rows of circumferentially spaced recesses formed in said ring and located on opposite sides of said joint, there being a different number of recesses in said first row than in said second row, first and second tapped holes formed through said first and second nuts, respectively, and registerable with the recesses in the respective rows, and first and second screws threaded releasably into said first and second tapped holes, respectively, and tightly received in one of the recesses in the respective rows to prevent relative rotation between said nuts and said ring.
Claim 2
Dependent Claim
122 words
A ball nut assembly comprising first and second axially alined nuts, a connector ring telescoped into said nuts and spanning the joint between the nuts, first and second axially spaced rows of circumferentially spaced recesses formed in said ring and located on opposite sides of said joint, there being a different number of recesses in said first row than in said second row, first and second tapped holes formed through said first and second nuts, respectively, and registerable with the recesses in the respective rows, and first and second screws threaded releasably into said first and second tapped holes, respectively, and tightly received in one of the recesses in the respective rows to prevent relative rotation between said nuts and said ring.
Claim 3
Dependent Claim
202 words
A ball nut assembly comprising first and second axially alined nut parts, a connector spanning the joint between said nut parts and having first and second rigidly joined parts facing said first and second nut parts, respectively, a first row of circumferentially spaced recesses formed in one of said first parts and extending circumferentially with respect to said first nut part, a first additional recess formed in the other of said first parts and registerable with the recesses in said first row, a second row of circumferentially spaced recesses formed in one of said second parts and extending circumferentially with respect to said second nut part, a second additional recess formed in the other of said second parts and registerable with the recesses in said second row, there being a different number of recesses in said first row than in said second row, first and second releasable fasteners accessible from the outer side of said assembly and releasably anchoring said first and second nuts, respectively, to said connector to prevent relative rotation between said nuts and said connector, said first fastener being inserted into registering ones of said first recesses and second fastener being inserted into registering ones of said second recesses.
Claim 4
Dependent Claim
202 words
A ball nut assembly comprising first and second axially alined nut parts, a connector spanning the joint between said nut parts and having first and second rigidly joined parts facing said first and second nut parts, respectively, a first row of circumferentially spaced recesses formed in one of said first parts and extending circumferentially with respect to said first nut part, a first additional recess formed in the other of said first parts and registerable with the recesses in said first row, a second row of circumferentially spaced recesses formed in one of said second parts and extending circumferentially with respect to said second nut part, a second additional recess formed in the other of said second parts and registerable with the recesses in said second row, there being a different number of recesses in said first row than in said second row, first and second releasable fasteners accessible from the outer side of said assembly and releasably anchoring said first and second nuts, respectively, to said connector to prevent relative rotation between said nuts and said connector, said first fastener being inserted into registering ones of said first recesses and second fastener being inserted into registering ones of said second recesses.
Claim 5
Dependent Claim
22 words
A ball nut assembly as defined in claim 2 in which said connector is a ring which is telescoped with said nuts.
Claim 6
Dependent Claim
18 words
A ball nut assembly as defined in claim 3 in which said ring is telescoped into said nuts.
Claim 7
Dependent Claim
38 words
A ball nut assembly as defined in claim 4 in which said first and second rows of recesses are formed in said ring, said first and second additional recesses being formed through said first and second nuts, respectively.
Claim 8
Dependent Claim
29 words
A ball nut assembly as defined in claim 5 in which said fasteners comprise threaded screws, said first and second additional recesses being tapped to threadably receive said screws.
Claim 9
Dependent Claim
62 words
A ball nut assembly as defined in claim 5 in which said first and second rows of recesses are defined by first and second rows of angularly spaced slots formed through said ring, the slots of one row opening out of one end of the ring and the slots of the other row opening out of the other end of the ring.
Claim 10
Dependent Claim
28 words
A ball nut assembly as defined in claim 4 in which counterbores are formed in the adjacent ends of said nuts, said ring being telescoped into said counterbores.
Claim 11
Dependent Claim
38 words
A ball nut assembly as defined in claim 8 in which additional counterbores are formed in the outboard ends of said nuts, and stripping rings fitted into said additional counterbores for preventing grime from infiltrating into said nuts.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |