Patent US3732054A successfully refreshed from Google Patents.
US3732054A
Expired / Lapsed
US
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Annular expanding ring structure
Assignee: Lyng Industrier AS Lekswikarmatur
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Filing: 1971-10-18
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Granted: 1973-05-08
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Expires: 1991-10-18
Abstract
Abstract An annular expanding ring structure comprising a number of circumferentially arranged segments adapted to undergo partly radial movements relative to the central axis there-through. The segments are arranged in two complementary sets such that each of the segments in the ring structure is interposed with surface contact between the two adjacent segments of the other set in alternating fashion. Each of the segments is suspended in a cylindrical body constituting the support for the segments to be moveable in synchronized fashion along a straight axis lying in the respective one of two identical cones, one for each set. The cones have common axis and geometrically coinciding base circles, which circle constitutes the center plane of the ring structure. Each of the segments has two opposed plane sliding faces, and the average angle between the opposed side faces of each segment viewed in a plane normal to the central axis is 360* : E, wherein E is the total number of segments.
Inventors
- 👤 B Lyng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:33
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/44; B29C33/48; B29C33/485; B29C57/00; B29C57/02; B29C57/04; B29L; B29L2031/00; B29L2031/24; Y; Y10; Y10S; Y10S425/00; Y10S425/218
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
175 words
In a cylindrical body for forming ring-shaped grooves or recesses in tube-shaped bodies, an annular expanding ring structure comprising a number of circumferentially arranged segments adapted to undergo radial movements relative to the central axis therethrough, said segments arranged in two complementary sets, one and each of the segments in the ring structure interposed with surface contact between two adjacent segments of the other set in alternating fashion, one and each of the segments suspended to be moveable in synchronized fashion Along a straight axis lying in the respective one of two identical cones having common axis and geometrically coinciding base circles, which circle constitutes the center plane of the ring structure, one and each of the segments having two opposed plane sliding faces, the average angle between the opposed side faces of each segment viewed in a plane normal to the central axis being 360* : E, wherein E is the total number of segments, operative to maintain one and each of the segments in mutual surface contact in all positions of the movement.
Claim 2
Dependent Claim
175 words
In a cylindrical body for forming ring-shaped grooves or recesses in tube-shaped bodies, an annular expanding ring structure comprising a number of circumferentially arranged segments adapted to undergo radial movements relative to the central axis therethrough, said segments arranged in two complementary sets, one and each of the segments in the ring structure interposed with surface contact between two adjacent segments of the other set in alternating fashion, one and each of the segments suspended to be moveable in synchronized fashion Along a straight axis lying in the respective one of two identical cones having common axis and geometrically coinciding base circles, which circle constitutes the center plane of the ring structure, one and each of the segments having two opposed plane sliding faces, the average angle between the opposed side faces of each segment viewed in a plane normal to the central axis being 360* : E, wherein E is the total number of segments, operative to maintain one and each of the segments in mutual surface contact in all positions of the movement.
Claim 3
Dependent Claim
50 words
Annular expanding ring structure in accordance with claim 1, wherein one and each of the segments are identical and has an angle between the opposed slide faces which in a plane normal to the central axes is equal to 360* : E, where E is the total number of segments.
Claim 4
Dependent Claim
27 words
An annular expanding ring structure in accordance with claim 1, wherein the segments in expanded position fill out a substantially ringshaped circumferential opening in the cylindrical body.
Claim 5
Dependent Claim
122 words
An annular expanding ring structure in accordance with claim 3, wherein said cylindrical body includes a centrally through-going piston rod (6), two to the rod at the ends of same via end bosses anchored cylinder bushings, which bushings constitute the external parts of the cylindrical body, and which bushings between themselves define said ringshaped opening therein, and two in the cylinder around the piston rod devised axially displacable, pressurized fluid operated pistons which constitute support for each and all of the segments in each respective set, the pistons operative to impart to each of the segments a rectilinear stroke from a retracted position to an expanded position wherein the external part of the segments constitute a contiguous annular surface profiled to requirements.
Claim 6
Dependent Claim
40 words
An annular expanding ring structure in accordance with claim 3, wherein said piston inwardly of the ringshaped opening in the cylinder body is provided with an axis-symmetrical guide flange having guide faces for guiding the respective segments during their movements.
Claim 7
Dependent Claim
42 words
An annular expanding ring structure in accordance with claim 4, wherein said pistons adjacent the segments are provided with conical faces complementary to said cones defining the movement axes for the segments, said conical faces provided with slide guides engaging the segments.
Claim 8
Dependent Claim
27 words
An annular ring structure in accordance with claim 6 wherein the apex angle of the two cones defining the axes of movements for the segments are 90*.
Claim 9
Dependent Claim
27 words
An annular expanding ring structure in accordance with claim 2, wherein one and each of the segments are generally configurated as regular prisms, viewed in cross-sectional planes.
Claim 10
Dependent Claim
20 words
Annular expanding ring structure in accordance with claim 8, wherein said two sets of segments altogether comprise 16 identical segments.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |