Patent US5213710A successfully refreshed from Google Patents.
US4281601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-slip turning joint for fuzes
Assignee: United States Department of the Army
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Filing: 1979-07-16
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Granted: 1981-08-04
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Expires: 1999-07-16
Abstract
Abstract Relative rotation of the two rotational members of a fuze during dynamic dition of firing are eliminated by interlocking annular, serrated, axial seating surfaces of the two members. A radially sinusoidal split ring in between radially adjacent annular recesses of the members cooperates with an inclined wall of the outer member's annular recess to provide an axial force biasing the serrated surfaces into engagement during static conditions. The split ring further serves as a locking device to hold the two members together as an assembly.
Inventors
- 👤 David L. Overman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:11
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/02; F16; F16B; F16B2200/00; F16B2200/69; F16B2200/73; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32262; Y10T403/32319; Y10T403/32368; Y10T403/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
In a fuze having a first and second member rotatably connected with adjacent annular engaging surfaces perpendicular to the axis of rotation, the improvement comprising: said engaging surfaces being sufficiently roughened to require relative axial movement of said members to effectuate relative rotation of said members; wherein said first member includes an annular recess on its outer surface, said second member includes an annular recess on its inner surface concentric to the annular recess of said first member, said annular recess of said second member has an inclined surface, biasing means including a split ring spring in both of said annular recesses, said spring and inclined surface cooperating to place said spring under sufficient compression to create an axial force requiring a minimum of forty inch-pounds of torque to rotate said members.
Claim 2
Dependent Claim
132 words
In a fuze having a first and second member rotatably connected with adjacent annular engaging surfaces perpendicular to the axis of rotation, the improvement comprising: said engaging surfaces being sufficiently roughened to require relative axial movement of said members to effectuate relative rotation of said members; wherein said first member includes an annular recess on its outer surface, said second member includes an annular recess on its inner surface concentric to the annular recess of said first member, said annular recess of said second member has an inclined surface, biasing means including a split ring spring in both of said annular recesses, said spring and inclined surface cooperating to place said spring under sufficient compression to create an axial force requiring a minimum of forty inch-pounds of torque to rotate said members.
Claim 3
Dependent Claim
19 words
The fuze according to claim 1 wherein said split ring spring has a sinusoidal configuration in the radial plane.
Claim 4
Dependent Claim
16 words
The fuze according to claim 1 wherein said engaging surfaces have interlocking serrations constituting said roughening.
Claim 5
Dependent Claim
106 words
In a fuze having a first and second member rotatably connected with adjacent annular engaging surfaces perpendicuar to the axis of rotation, the improvement comprising: said engaging surfaces each having serrations extending axially; said first member having an annular recess on its outer surface; said second member having an annular recess on its inner surface concentric to the annular recess of said first member, the wall of said annular recess of said second member furthest from the engaging surfaces being inclined; and a resilient split ring in both of said annular recesses and cooperating with said inclined wall to bias said serrations axially into interlocking engagement.
Claim 6
Dependent Claim
106 words
In a fuze having a first and second member rotatably connected with adjacent annular engaging surfaces perpendicuar to the axis of rotation, the improvement comprising: said engaging surfaces each having serrations extending axially; said first member having an annular recess on its outer surface; said second member having an annular recess on its inner surface concentric to the annular recess of said first member, the wall of said annular recess of said second member furthest from the engaging surfaces being inclined; and a resilient split ring in both of said annular recesses and cooperating with said inclined wall to bias said serrations axially into interlocking engagement.
Claim 7
Dependent Claim
33 words
The fuze according to claim 4 wherein the split ring is configured to exert an axial force requiring a minimum of forty inch-pounds of torque to rotate the members relative to each other.
Claim 8
Dependent Claim
18 words
The fuze according to claim 4 wherein said split ring has a sinusoidal configuration in the radial plane.
Claim 9
Dependent Claim
19 words
The fuze according to claim 6 wherein said split ring has a minimum of six sinusoids about its periphery.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |