Patent US4712451A successfully refreshed from Google Patents.
US4712451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starter with a gear reduction mechanism
Assignee: Mitsubishi Electric Corp
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Filing: 1986-01-14
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Granted: 1987-12-15
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Expires: 2006-01-14
Abstract
Abstract A starter with a gear reduction mechanism including an internal ring gear formed of synthetic resin and a reinforcing member. The internal ring gear has a cylindrical portion and a toothed portion formed on an inner peripheral surface of the cylindrical portion. The reinforcing member is secured around an outer surface of the cylindrical portion.
Inventors
- 👤 Akira Morishita
- 👤 Kyoichi Okamoto
- 👤 Taiichi Nakagawa
- 👤 Hiroyuki Morikane
- 👤 Akinori Hasegawa
- 👤 Takemi Arima
- 👤 Tadami Kounou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:37
CPC Classifications
F; F02; F02N; F02N15/00; F02N15/02; F02N15/04; F02N15/06; Y; Y10; Y10S; Y10S475/00; Y10S475/901; Y10S475/902; Y10S74/00; Y10S74/10; Y10T; Y10T74/00; Y10T74/13; Y10T74/131; Y10T74/137; Y10T74/19; Y10T74/1987; Y10T74/19893; Y10T74/19921; Y10T74/19949; Y10T74/19963
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
180 words
A gear reduction mechanism comprising: a rotary shaft having a spur gear formed on an outer peripheral surface thereof; a plurality of planet gears engaging said spur gear; an output rotary shaft supporting said plurality of planet gears so as to cause rotation of said rotary shaft; an internal ring gear formed of molded synthetic resin and having an intermediate bracket having a flange portion extending outwardly in the radial direction from said output rotary shaft, a cylindrical portion extending in the longitudinal direction with respect to said output rotary shaft, said flange portion acting as a cantilever for said cylindrical portion, and a toothed portion formed on an inner peripheral surface of said cylindrical portion, said plurality of planet gears engaging said toothed portion of said internal ring gear; a front bracket into which said flange portion of said intermediate bracket is fitted so as to support said internal ring gear; and a reinforcing member comprising a material having a higher mechanical strength than said synthetic resin, said member being secured to the outer surface of said cylindrical portion.
Claim 2
Dependent Claim
180 words
A gear reduction mechanism comprising: a rotary shaft having a spur gear formed on an outer peripheral surface thereof; a plurality of planet gears engaging said spur gear; an output rotary shaft supporting said plurality of planet gears so as to cause rotation of said rotary shaft; an internal ring gear formed of molded synthetic resin and having an intermediate bracket having a flange portion extending outwardly in the radial direction from said output rotary shaft, a cylindrical portion extending in the longitudinal direction with respect to said output rotary shaft, said flange portion acting as a cantilever for said cylindrical portion, and a toothed portion formed on an inner peripheral surface of said cylindrical portion, said plurality of planet gears engaging said toothed portion of said internal ring gear; a front bracket into which said flange portion of said intermediate bracket is fitted so as to support said internal ring gear; and a reinforcing member comprising a material having a higher mechanical strength than said synthetic resin, said member being secured to the outer surface of said cylindrical portion.
Claim 3
Dependent Claim
15 words
A gear reduction mechanism according to claim 1, wherein said material comprises a pure metal.
Claim 4
Dependent Claim
15 words
A gear reduction mechanism according to claim 1, wherein said material comprises strengthened synthetic resin.
Claim 5
Dependent Claim
15 words
A gear reduction mechanism according to claim 1, wherein said material comprises a light alloy.
Claim 6
Dependent Claim
15 words
A gear reduction mechanism according to claim 1, wherein said reinforcing member is a ring.
Claim 7
Dependent Claim
27 words
A gear reduction mechanism according to claim 1, wherein said reinforcing member is secured to the outer peripheral surface and the end surface of the cylindrical portion.
Claim 8
Dependent Claim
14 words
A gear reduction mechanism according to claim 2, wherein said pure metal is iron.
Claim 9
Dependent Claim
16 words
A gear reduction mechanism according to claim 3, wherein said strengthened synthetic resin is carbon fiber.
Claim 10
Dependent Claim
16 words
A gear reduction mechanism according to claim 3, wherein said strengthened synthetic resin is glass fiber.
Claim 11
Dependent Claim
26 words
A gear reduction mechanism according to claim 1, wherein said reinforcing member includes a plurality of projections extending radially inwardly from an inner peripheral surface thereof.
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) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |