Patent US4333283A successfully refreshed from Google Patents.
US4333283A
Expired / Lapsed
US
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Double sash structure
Assignee: YKK Corp
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Filing: 1979-10-30
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Granted: 1982-06-08
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Expires: 1999-10-30
Abstract
Abstract In a double sash structure comprising a first sash facing to the outside and a second sash facing to the inside, a window frame of the first sash is formed of a metallic material and a window frame of the second sash, which is formed of a non-metallic material having a low heat conductivity, is disposed contiguously to the window frame of the first sash. By virtue of the low heat conductivity of the window frame of the second sash, lowering of the temperature in the room and formation of dew by condensation of moisture can be prevented. Accordingly, a double sash structure excellent in the heat-insulating property and having a beautiful appearance and an improved strength, which can be readily assembled, can be provided.
Inventors
- 👤 Hiroyuki Ebata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:33
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/04; E06B3/26; E06B3/2605; E06B3/32; E06B3/34; E06B3/42; E06B3/46; E06B3/4609; E06B2003/2625; Y; Y10; Y10S; Y10S49/00; Y10S49/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
A double sash structure for attachment in and around an opening in a room structure, a first window frame supporting said first sash and having first engagement means integral therewith, a second sash disposed on the indoor side of the room structure, and a second window frame supporting said second sash and having second engagement means integral therewith adapted for positive coupling with said first window frame, said first window frame and said first sash being formed of a metallic material and said second window frame and second sash a synthetic resin material having a low heat conductivity, said first and second engagement means each comprising a projecting engagement member extending toward the other and operative upon attachment of said second frame to said first frame to securely fix the first and second frames together.
Claim 2
Dependent Claim
135 words
A double sash structure for attachment in and around an opening in a room structure, a first window frame supporting said first sash and having first engagement means integral therewith, a second sash disposed on the indoor side of the room structure, and a second window frame supporting said second sash and having second engagement means integral therewith adapted for positive coupling with said first window frame, said first window frame and said first sash being formed of a metallic material and said second window frame and second sash a synthetic resin material having a low heat conductivity, said first and second engagement means each comprising a projecting engagement member extending toward the other and operative upon attachment of said second frame to said first frame to securely fix the first and second frames together.
Claim 3
Dependent Claim
31 words
A double sash structure according to claim 1, wherein a screen of the first sash consists of a multi-layer of glass comprising a plurality of glass sheets arranged at optional intervals.
Claim 4
Dependent Claim
55 words
A double sash structure according to claim 1, wherein said first engagement means of the first window frame includes spaced first and second lips and said second engagement portion of the second window frame has a projection for insertion and positive support between said first and second lips from the indoor side of the structure.
Claim 5
Dependent Claim
55 words
A double sash structure according to claim 3, wherein said projection of the second engagement portion of the second window frame has a relief groove provided in the longitudinal direction thereof, whereby when the projection is inserted between the first and second lips of the first window frame it can flex to narrow said groove.
Claim 6
Dependent Claim
36 words
A double sash structure according to claim 1, wherein said engaging portion of the second window has an extending portion thereof projecting over an outer surface portion of the engaging member of the first window frame.
Claim 7
Dependent Claim
43 words
A double sash structure according to claim 5, wherein in coupling said second window frame with said first window frame, the former can be inserted in the longitudinal direction of the structure prior to insertion of the second window frame into the opening.
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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) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |