Patent US3928954A successfully refreshed from Google Patents.
US3928954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Louvre system
Assignee: Individual
•
Filing: 1974-04-18
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Granted: 1975-12-30
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Expires: 1994-04-18
Abstract
Abstract A louvre system includes a series of louvres, stringers located parallel to each other to support the louvres between them, each stringer being formed with a registering slot receiving the louvre, and a locking piece adapted to engage with each stringer to clamp the louvre in position.
Inventors
- 👤 Alwyn Petrus Naude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:14
CPC Classifications
E; E06; E06B; E06B7/00; E06B7/02; E06B7/08; E06B7/082
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A louvre system including a louvre, at least two stringers located parallel to each other and supporting a louvre between them, characterized by each stringer being formed with a registering slot receiving the louvre and said slot wall and louvre having engaging means, an abutment comprising or associated with one edge of the slot, a locking piece separate from the stringer and in engagement with the abutment to clamp the louvre against the abutment, and locking means engaging between said locking piece and said stringer to maintain engaged said engaging means.
Claim 2
Dependent Claim
91 words
A louvre system including a louvre, at least two stringers located parallel to each other and supporting a louvre between them, characterized by each stringer being formed with a registering slot receiving the louvre and said slot wall and louvre having engaging means, an abutment comprising or associated with one edge of the slot, a locking piece separate from the stringer and in engagement with the abutment to clamp the louvre against the abutment, and locking means engaging between said locking piece and said stringer to maintain engaged said engaging means.
Claim 3
Dependent Claim
36 words
A louvre system as claimed in claim 1 in which the stringers are channel sections having an open side between two legs formed from sheet material, and the registering slots are cut out of the legs.
Claim 4
Dependent Claim
16 words
A louvre system as claimed in claim 2 in which the sheet material is sheet metal.
Claim 5
Dependent Claim
43 words
A louvre system as claimed in claim 3 in which the locking piece is a piece of channel section formed from sheet material adapted to engage in a spring fit with a stringer to abut the louvre and clamp it against the abutment.
Claim 6
Dependent Claim
16 words
A louvre system as claimed in claim 4 in which the sheet material is sheet metal.
Claim 7
Dependent Claim
35 words
A louvre system as claimed in claim 4 in which the locking means comprises a lug projecting from the channel wall adapted to engage with the edge of the slot away from the abutment edge.
Claim 8
Dependent Claim
22 words
A louvre system as claimed in claim 6 in which the lug comprises a tab cut and bent from the sheet material.
Claim 9
Dependent Claim
73 words
A louvre system as claimed in claim 4 for supporting a plurality of louvres, a series of registering slots being spaced along the stringers, in which the end of the channel piece comprising the locking piece away from the end that abuts a louvre to hold it against the abutment associated with its registering slot, projects from the edge of the next slot in the series to from the abutment for that slot.
Claim 10
Dependent Claim
20 words
A louvre system as claimed in claim 1 in which one free edge of the louvre extends beyond the stringer.
References Cited (Backward Citations)
US3540178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |