Patent US3123383A successfully refreshed from Google Patents.
US3123383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:57
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/24; B60D1/28; Y; Y10; Y10T; Y10T24/00; Y10T24/45; Y10T24/45225; Y10T24/45984; Y10T24/4599
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
178 words
A SAFETY COUPLING FOR MAINTAINING TWO RELATIVELY MOVABLE MEMBERS AT A PREDETERMINED LIMIT OF SEPARATING MOVEMENT, WHEREIN AT LEAST ONE OF SAID MEMBERS HAS A CIRCULAR TERMINAL PORTION OF PREDETERMINED DIAMETER AND A PORTION OF SMALLER DIAMETER, AND SAID COUPLING CONSISTS OF A CHAIN AND A KEY-HOLE LINK, ATTACHED TO AN END LINK THEREOF, THE SAID KEY-HOLE LINK HAVING A LARGE CIRCULAR PORTION OF AN INSIDE DIAMETER ONLY SLIGHTLY GREATER THAN THE DIAMETER OF SAID TERMINAL PORTION OF SAID ONE MEMBER AND A SMALLER PORTION OF A SIZE SUFFICIENT TO RECEIVE SAID SMALLER DIAMETER PORTION OF SAID ONE MEMBER BUT INSUFFICIENT TO PASS SAID TERMINAL PORTION, SAID CHAIN END LINK BEING FREELY MOVABLE FROM ONE PORTION OF THE KEY-HOLE LINK TO THE OTHER AND SAID CHAIN END LINK WHEN ENGAGED IN SAID LARGE PORTION OF THE KEY-HOLE LINK REDUCING THE EFFECTIVE INSIDE DIAMETER OF SAID LARGE PORTION WHEREBY TO PREVENT PASSAGE OF SAID TERMINAL PORTION THERETHROUGH, AND MEANS FORMING AN ELEMENT OF THE CHAIN AT THE OTHER END THEREOF FOR ATTACHMENT TO THE OTHER ONE OF SAID MEMBERS.
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) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |