US4570769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ratchet mechanism
Assignee: Nidec Instruments Corp
•
Filing: 1982-11-01
•
Granted: 1986-02-18
•
Expires: 2002-11-01
Abstract
Abstract A ratchet mechanism comprises a rotatable member made of synthetic resin and a rotating body mounted coaxially with the rotatable member and having a portion engaging the rotatable member. The rotating body has a plurality of teeth. The rotatable member having an annular peripheral wall and a plurality of U-shaped engagement arms. Each of the arms includes a proximal end portion integral with the annular peripheral wall, a first arm member extending along the annular peripheral wall, and a second arm member having on a free end thereof an engaging portion disposed in a path of angular movement of the teeth of the rotating body and the other end joined to the first arm member.
Inventors
- 👤 Akihiko Isaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:42
CPC Classifications
F; F16; F16D; F16D41/00; F16D41/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
A ratchet mechanism comprising a first rotatable member made of synthetic resin and a second rotatable mounted coaxially with said first rotatable member, either one of said first and second rotatable members having a plurality of U-shaped resilient engagement arms made of synthetic resin angularly spaced at equal angular intervals and having engaging portions, the other of said rotatable members having a plurality of teeth angularly spaced at equal angular intervals and engageable with said engaging portions of said engagement arms when said first and second rotatable members rotate together in a first direction, said teeth deflecting said engagement arms when said first and second rotatable members rotate relative to each other opposite said first direction, a bent portion of said U-shaped arms contacting a periphery of said one of said rotatable members opposed to said teeth when said first and second rotatable members rotate together in said first direction and said teeth engage said engaging portions of said contacting arms.
Claim 2
Dependent Claim
161 words
A ratchet mechanism comprising a first rotatable member made of synthetic resin and a second rotatable mounted coaxially with said first rotatable member, either one of said first and second rotatable members having a plurality of U-shaped resilient engagement arms made of synthetic resin angularly spaced at equal angular intervals and having engaging portions, the other of said rotatable members having a plurality of teeth angularly spaced at equal angular intervals and engageable with said engaging portions of said engagement arms when said first and second rotatable members rotate together in a first direction, said teeth deflecting said engagement arms when said first and second rotatable members rotate relative to each other opposite said first direction, a bent portion of said U-shaped arms contacting a periphery of said one of said rotatable members opposed to said teeth when said first and second rotatable members rotate together in said first direction and said teeth engage said engaging portions of said contacting arms.
Claim 3
Dependent Claim
156 words
A ratchet mechansim comprising a rotatable member made of synthetic resin and a rotating body mounted coaxially with the rotatable member and having a portion engaging said rotatable member, the rotating body having a plurality of teeth, said rotatable member having an annular peripheral wall and a plurality of U-shaped engagement arms each including a proximal end portion integral with the annular peripheral wall, a first arm member extending along the annular peripheral wall, and a second arm member having on a free end thereof an engaging portion disposed in a path of angular movement of said teeth of said rotating body and the other end joined to the first arm member, said teeth being engageable with said engaging portions when said rotatable member and said rotating body rotate together in a first direction and deflecting said engagement arms when said rotatable member and said rotating body rotate relative to each other opposite said first direction.
Claim 4
Dependent Claim
156 words
A ratchet mechansim comprising a rotatable member made of synthetic resin and a rotating body mounted coaxially with the rotatable member and having a portion engaging said rotatable member, the rotating body having a plurality of teeth, said rotatable member having an annular peripheral wall and a plurality of U-shaped engagement arms each including a proximal end portion integral with the annular peripheral wall, a first arm member extending along the annular peripheral wall, and a second arm member having on a free end thereof an engaging portion disposed in a path of angular movement of said teeth of said rotating body and the other end joined to the first arm member, said teeth being engageable with said engaging portions when said rotatable member and said rotating body rotate together in a first direction and deflecting said engagement arms when said rotatable member and said rotating body rotate relative to each other opposite said first direction.
Claim 5
Dependent Claim
17 words
A ratchet mechanism according to claim 2, wherein said first arm is thinner than said second arm.
References Cited (Backward Citations)
US1566378A
Cited
FR657009A
Cited
FR1386955A
Cited
GB1169028A
Cited
DE2246447A1
Cited
US3910557A
Cited
US4125074A
Cited
US4130271A
Cited
DE2723954A1
Cited
JPS5534342A
Cited
JPS55119231A
Cited
JPS5617871A
Cited
US4401006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |