Patent US2624274A successfully refreshed from Google Patents.
Patent US4602519A successfully refreshed from Google Patents.
US4602519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two speed lightweight racing transmission
Assignee: Individual
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Filing: 1985-02-25
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Granted: 1986-07-29
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Expires: 2005-02-25
Abstract
Abstract This invention relates generally to the field of automobile transmissions, and is specifically directed to the method of modifying a standard multi-speed transmission to obtain a lightweight two speed racing transmission, having an improved power to weight ratio, and a simplified shifting pattern, which are particularly desirable for modified, sprint, and stock cars racing on oval tracks.
Inventors
- 👤 John Atkins
- 👤 Michael A. Bonicelli
- 👤 Charles E. Conser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:41
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/02; F16H3/08; F16H3/087; F16H3/091; F16H3/0915; F16H57/00; F16H57/02; F16H57/021; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49716; Y10T29/49826; Y10T29/49904; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/1947; Y10T74/19474; Y10T74/19479; Y10T74/21; Y10T74/2186
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
A method for constructing an improved two speed racing transmission from an existing multi-speed transmission having a transmission housing, a transmission output shaft and at least three transmission gear ratios associated with the output shaft; wherein the method comprises the steps of: (a) severing the existing multi-speed transmission housing and output shaft, at a point where only the two highest gear ratios will remain on the transmission output shaft; (b) severing a portion of the severed output shaft, and securing that portion to the transmission output shaft retaining the two highest gear ratios; and (c) placing a plate having an output shaft housing over the free end of the said output shaft portion, and securing the plate to the open end of the transmission housing; (d) connecting a shifting mechanism through the transmission housing, and operatively attaching the shifting mechanism to the said two highest gear ratios.
Claim 2
Independent Claim
147 words
A method for constructing an improved two speed racing transmission from an existing multi-speed transmission having a transmission housing, a transmission output shaft and at least three transmission gear ratios associated with the output shaft; wherein the method comprises the steps of: (a) severing the existing multi-speed transmission housing and output shaft, at a point where only the two highest gear ratios will remain on the transmission output shaft; (b) severing a portion of the severed output shaft, and securing that portion to the transmission output shaft retaining the two highest gear ratios; and (c) placing a plate having an output shaft housing over the free end of the said output shaft portion, and securing the plate to the open end of the transmission housing; (d) connecting a shifting mechanism through the transmission housing, and operatively attaching the shifting mechanism to the said two highest gear ratios.
Claim 3
Dependent Claim
42 words
A method as in claim 1 wherein; the shifting mechanism comprises, a shifting lever pivotally connected to the transmission housing to actuate a shift fork, wherein the shift lever controls the engagement of the two remaining gear ratios in a push-pull manner.
Claim 4
Dependent Claim
15 words
An improved two speed racing transmission built in accordance with the method of claim 2.
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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) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |