Patent US3557737A successfully refreshed from Google Patents.
US3557737A
Expired / Lapsed
US
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Chain stopper
Assignee: IHC Holland NV
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Filing: 1968-11-13
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Granted: 1971-01-26
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Expires: 1988-11-13
Abstract
Abstract A chain stopper comprises a separable chain-grasping insert rotatably received in a conical recess in a body which is supported on oppositely outwardly extending trunnions that have concave supporting under surfaces curved on a relatively long radius of curvature and which rest on fixed convex supporting surfaces curved on a relatively short radius of curvature.
Inventors
- 👤 August Hendrik Maria Smulders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:36
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/18; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3902
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
In a chain stopper comprising a body adapted to grasp a chain, and a support on which said body is supported, said body having supporting surfaces carried thereby which engage with supporting surfaces carried by said support to support said body for swinging movement relative to said support, the supporting surfaces carried by one of said body and support being convex and the supporting surfaces carried by the other of said body and support being concave; the improvement in which the radius of curvature of said convex supporting surfaces is Substantially shorter than the radius of curvature of said concave supporting surfaces where said surfaces contact each other.
Claim 2
Dependent Claim
108 words
In a chain stopper comprising a body adapted to grasp a chain, and a support on which said body is supported, said body having supporting surfaces carried thereby which engage with supporting surfaces carried by said support to support said body for swinging movement relative to said support, the supporting surfaces carried by one of said body and support being convex and the supporting surfaces carried by the other of said body and support being concave; the improvement in which the radius of curvature of said convex supporting surfaces is Substantially shorter than the radius of curvature of said concave supporting surfaces where said surfaces contact each other.
Claim 3
Dependent Claim
27 words
a chain stopper as claimed in claim 1, said convex supporting surfaces being carried by said support and said concave supporting surfaces being carried by said body.
Claim 4
Dependent Claim
32 words
A chain stopper as claimed in claim 2, said body having stub shafts extending outwardly from opposite sides thereof, said concave surfaces being disposed on the under sides of said stub shafts.
Claim 5
Dependent Claim
66 words
A chain stopper as claimed in claim 1, in combination with a chain one of whose links is grasped by said body, said chain being comprised of a plurality of relatively swingable links disposed in planes alternately at right angles to each other, the center of curvature of said concave surfaces being at about the point of contact of the grasped link with the next link.
References Cited (Backward Citations)
US1258580A
Cited
US3289626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |