Patent US4195874A successfully refreshed from Google Patents.
US4195874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle rear window arrangement
Assignee: Volkswagen AG
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Filing: 1978-07-21
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Granted: 1980-04-01
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Expires: 1998-07-21
Abstract
Abstract A vehicle is provided with a rear window arrangement having first and second rear window portions at different angles from the vertical, and a spoiler with an upper deflection surface having an angle of at least 90° from the vertical. The two portion rear window arrangement provides increased rearward visibility and decreased vehicle wind resistance. The spoiler may be arranged to form a flow channel around the edge where the two window portions meet, to deflect an air stream and prevent accumulation of dirt on the lower rear window portion.
Inventors
- 👤 Lutz Janssen
- 👤 Klaus-Rainer Deutenbach
- 👤 Hans-Jochen Luckoff
- 👤 Karl Warnecke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:44
CPC Classifications
B; B62; B62D; B62D35/00; B62D35/007; B60; B60J; B60J1/00; B60J1/20; B60J1/2002; B60J1/2008; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/82
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
A rear window arrangement for a fastback vehicle comprising a first rear window portion having a first angle with respect to the vertical, said first angle being selected to ensure a smooth laminar flow of air along the first window portion and a drag coefficient no greater than that of a square back vehicle, and a second rear window portion, behind and below the first window portion and having a second and smaller angle with respect to the vertical, said first and second window portions meeting at a rearward pointing outside corner, and a rear spoiler along said corner, said spoiler having an upper deflection surface having an angle of at least 90° from the vertical.
Claim 2
Dependent Claim
116 words
A rear window arrangement for a fastback vehicle comprising a first rear window portion having a first angle with respect to the vertical, said first angle being selected to ensure a smooth laminar flow of air along the first window portion and a drag coefficient no greater than that of a square back vehicle, and a second rear window portion, behind and below the first window portion and having a second and smaller angle with respect to the vertical, said first and second window portions meeting at a rearward pointing outside corner, and a rear spoiler along said corner, said spoiler having an upper deflection surface having an angle of at least 90° from the vertical.
Claim 3
Dependent Claim
40 words
A rear window arrangement as specified in claim 1 wherein said spoiler has a lower surface having a greater angle from the vertical than said upper deflection surface and meeting said upper surface at the trailing edge of said spoiler.
Claim 4
Dependent Claim
44 words
A rear window arrangement as specified in claim 1 wherein said spoiler has a downwardly facing guide surface facing said transverse window corner and having a selected distance from said corner thereby forming a flow channel for air flowing along said first window portion.
Claim 5
Dependent Claim
18 words
A rear window arrangement as specified in claim 3 wherein said selected distance is 5 to 25 mm.
Claim 6
Dependent Claim
26 words
A rear window arrangement as specified in claim 3 wherein said guide surface is concave to follow the transition between said first and second window portions.
Claim 7
Dependent Claim
31 words
A rear window arrangement as specified in any of claims 1, 2, 3, 4, or 5 wherein said first and second window portions are formed from a single bent window pane.
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) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |