Patent US3848890A successfully refreshed from Google Patents.
US3848890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling for connecting tandem trailer to bicycle
Assignee: Individual
•
Filing: 1973-02-01
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Granted: 1974-11-19
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Expires: 1993-02-01
Abstract
Abstract A coupling for connecting the drawbar of a tandem trailer to the seat post of a bicycle frame comprising a clamp for clamping engagement with the seat post, a link rotatably connected to the clamp for rotation about a substantially horizontal axis perpendicular to the axis of the seat post, a post fixed to the other end of the link on which the loop at the end of the drawbar is adapted to be pivotally mounted, a jaw pivotally mounted on the link adjacent the post having a hook at its end for engagement with the inside of the loop and a hole for engagement with the post, and a latch plate mounted on the jaw for releasably holding the hook engaged with the inner side of the loop and the hole engaged on the post.
Inventors
- 👤 A Macalpine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:54
CPC Classifications
B; B62; B62K; B62K27/00; B62K27/10; B62K27/12; B62K27/003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
155 words
A coupling for connecting the loop at the end of the draw bar of a tandem trailer to the seat post of a bicycle frame comprising a clamp adapted to be clamped to the seat post, a link pivotally connected at one end to the clamp for rolling about a roll axis, a post fixed to the other end of the link on which the loop is adapted to be pivotally mounted for swivel movement, a jaw comprising a part pivotally mounted on the link adjacent to post, said jaw having a part at its end for engagement with the loop containing a hole for receiving said post and a fail safe hook disposed at the inner side of the loop and means mounted on the jaw for releasably holding said part in engagement to loop, with the hook disposed at the inner side of the loop and with the hole engaged with the post.
Claim 2
Dependent Claim
155 words
A coupling for connecting the loop at the end of the draw bar of a tandem trailer to the seat post of a bicycle frame comprising a clamp adapted to be clamped to the seat post, a link pivotally connected at one end to the clamp for rolling about a roll axis, a post fixed to the other end of the link on which the loop is adapted to be pivotally mounted for swivel movement, a jaw comprising a part pivotally mounted on the link adjacent to post, said jaw having a part at its end for engagement with the loop containing a hole for receiving said post and a fail safe hook disposed at the inner side of the loop and means mounted on the jaw for releasably holding said part in engagement to loop, with the hook disposed at the inner side of the loop and with the hole engaged with the post.
Claim 3
Dependent Claim
163 words
A coupling for connecting the loop at the end of a draw bar of a tandem trailer to the seat post of a bicycle frame comprising a clamp adapted to be clamped to the seat post, a link pivotally connected at one end to the clamp for rolling about a roll axis, a post fixed to the other end of the link on which the loop is adapted to be pivotally mounted for swivel movement, a jaw comprising a first part fixed to the link adjacent to post and a second part pivotally mounted thereon for pivotal movement to and from the first part, said second part embodying a hook adapted to be disposed at the inner side of the loop and containing a hole for receiving the post, and a latch mounted on the second part in engagement with the first part to hold the first part engaged with the pin and the hook disposed at the inner side of the loop.
Claim 4
Dependent Claim
163 words
A coupling for connecting the loop at the end of a draw bar of a tandem trailer to the seat post of a bicycle frame comprising a clamp adapted to be clamped to the seat post, a link pivotally connected at one end to the clamp for rolling about a roll axis, a post fixed to the other end of the link on which the loop is adapted to be pivotally mounted for swivel movement, a jaw comprising a first part fixed to the link adjacent to post and a second part pivotally mounted thereon for pivotal movement to and from the first part, said second part embodying a hook adapted to be disposed at the inner side of the loop and containing a hole for receiving the post, and a latch mounted on the second part in engagement with the first part to hold the first part engaged with the pin and the hook disposed at the inner side of the loop.
Claim 5
Dependent Claim
34 words
A coupling according to claim 1, comprising a swivel bar pivotally mounted on the post and pairs of opposed spring fingers mounted on the bar radially of the post for engagement with the loop.
Claim 6
Dependent Claim
39 words
A coupling according to claim 1, wherein the clamp contains opposed arcuate portions for engagement with the seat post and bolts through it forwardly and rearwardly of the arcuate portions for binding the arcuate portions about the seat post.
Claim 7
Dependent Claim
38 words
A coupling according to claim 1, wherein the adjacent ends of the clamp and link are pivotally connected for rotation relative to each other about a substantially horizontal axis at right angles to the axis of the post.
Claim 8
Dependent Claim
15 words
A coupling according to claim 1, wherein the post is substantially perpendicular to the link.
Claim 9
Dependent Claim
30 words
Apparatus according to claim 2, wherein the means holding the second part closed is a latch plate and there is spring means yieldably holding the latch plate in latched position.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |