US3880014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive chain
Assignee: Individual
•
Filing: 1974-08-05
•
Granted: 1975-04-29
•
Expires: 1994-08-05
Abstract
Abstract A drive chain for transmitting power between toothed sprockets. Identical one-piece link members have integral sprocket engagement and interconnection portions maintaining the link members in separable assembly. The link design is particularly adapted to precise fabrication using injection molded plastic, sintered powder metal and diecasting processes.
Inventors
- 👤 Wilfrid H Bendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:49
CPC Classifications
F; F16; F16G; F16G13/00; F16G13/02; F16G13/06; F16G13/07
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
A drive chain having apertured link members arranged end to end with overlapping interconnected end portions, said link members having side bar portions extending on each side of an aperture between interconnecting end portions of substantially semi-cylindrical form, each of said end portions having a portion thereof intersecting an aperture of an adjacently aligned link member, said portion thereof comprising a link interconnection bearng surface at each inner end of an aperture and a drive sprocket engaging surface at each outer end of a link and having the bearing surface in articulating contact with a like bearing surface of adjacently aligned link members, each of said end portions further comprising an arcuate groove and resilient means engaging a groove of an adjacent link member and maintaining said members in elastically separable end to end alignment.
Claim 2
Dependent Claim
135 words
A drive chain having apertured link members arranged end to end with overlapping interconnected end portions, said link members having side bar portions extending on each side of an aperture between interconnecting end portions of substantially semi-cylindrical form, each of said end portions having a portion thereof intersecting an aperture of an adjacently aligned link member, said portion thereof comprising a link interconnection bearng surface at each inner end of an aperture and a drive sprocket engaging surface at each outer end of a link and having the bearing surface in articulating contact with a like bearing surface of adjacently aligned link members, each of said end portions further comprising an arcuate groove and resilient means engaging a groove of an adjacent link member and maintaining said members in elastically separable end to end alignment.
Claim 3
Dependent Claim
25 words
The drive chain of claim 1, wherein said link end portions further comprise inTegral extensions thereof engaging a groove of an adjacently aligned link member.
Claim 4
Dependent Claim
30 words
The drive chain of claim 1, wherein said bearing surface is substantially arcuate in form and adapted for rocking contact with a like bearing surface of an interconnected link member.
Claim 5
Dependent Claim
29 words
The drive chain of claim 1, wherein said intersecting end portions at opposite ends of the link members project on opposite sides of a line through said articulating contact.
Claim 6
Dependent Claim
28 words
The drive chain of claim 1, wherein said drive sprocket engaging surface is shaped to engage drive sprockets having teeth of industrially standardized roller chain sprocket tooth form.
References Cited (Backward Citations)
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |