Patent US4463976A successfully refreshed from Google Patents.
US4463976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casement windows
Assignee: Arthur Shaw Manufacturing Ltd
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Filing: 1982-11-08
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Granted: 1984-08-07
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Expires: 2002-11-08
Abstract
Abstract In a casement window, the casement fastener comprises a pivotal lever handle 5 mounted on the sash 2 through a plate 7 and a keeper 6 mounted on the casement frame 1. The keeper 6 has two similar lugs 14,15 symmetrically disposed lengthwise of the keeper plate 11. The lever handle 5 has an abutment face 10 to engage either lug 14,15 for fastening the sash, and a through slot 9 in which either lug 14,15 may be received to hold the sash in a ventilating position. The fastener may be used for right or left hinged sashes, and by the special form of keeper and handle, the fastener can be used for any required attitude of installation without concern for specially handed keepers or lever handles.
Inventors
- 👤 Jack E. Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:18
CPC Classifications
E; E05; E05C; E05C3/00; E05C3/02; E05C3/04; E05C3/041; E05C3/044; E05B; E05B63/00; E05B63/04; Y; Y10; Y10S; Y10S292/00; Y10S292/33; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1075; Y10T292/1083; Y10T292/1097
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
181 words
In a casement window having a glazed sash mounted on a frame for relative movement by a hinge, a fastener comprising a lever handle mounted on a plate for pivotal movement from an intermediate release position to one of first and second securing positions spaced relatively by 180°, said handle mounting plate being secured to the hinged sash of the casement window for engagement with a keeper mounted on the adjacent casement frame, said keeper comprising a base plate having similar first and second spaced apart lugs projecting therefrom, each said lug being arranged for engagement by an abutment face of said lever when said lever is in a respective one of the said two securing positions with said abutment face being spaced from the pivot axis of said lever handle, whereby said lever handle may be moved from the released intermediate position when it clears the space intermediate said first and second lugs of the keeper to one of said first and second securing positions engaging respectively either said first or second lug to secure said sash to said frame.
Claim 2
Dependent Claim
181 words
In a casement window having a glazed sash mounted on a frame for relative movement by a hinge, a fastener comprising a lever handle mounted on a plate for pivotal movement from an intermediate release position to one of first and second securing positions spaced relatively by 180°, said handle mounting plate being secured to the hinged sash of the casement window for engagement with a keeper mounted on the adjacent casement frame, said keeper comprising a base plate having similar first and second spaced apart lugs projecting therefrom, each said lug being arranged for engagement by an abutment face of said lever when said lever is in a respective one of the said two securing positions with said abutment face being spaced from the pivot axis of said lever handle, whereby said lever handle may be moved from the released intermediate position when it clears the space intermediate said first and second lugs of the keeper to one of said first and second securing positions engaging respectively either said first or second lug to secure said sash to said frame.
Claim 3
Dependent Claim
53 words
A fastener according to claim 1 wherein said lever handle is provided with a through slot or recess extending substantially parallel to the said abutment face, and said first or second lugs may be received in said slot or recess to keep said sash displaced outwardly from said frame in a ventilating position.
Claim 4
Dependent Claim
34 words
A fastener according to claim 2 wherein said keeper base plate is elongate and substantially flat and has an underside face which is chamfered or profiled to complement the profile of said casement frame.
Claim 5
Dependent Claim
54 words
A fastener according to claim 1 wherein said mounting plate for said lever handle includes holes receiving fasteners securing said plate to said sash, and said holes being located so that when the fastener is in either said first or second securing positions, said lugs on said keeper overlie said holes and fasteners therein.
Claim 6
Dependent Claim
52 words
A fastener according to claim 4 wherein said similar first and second lugs are symmetrically disposed on said keeper base plate, and the face of each said lug engageable by the said abutment face of said lever handle is inclined to provide a wedging action on engagement by the said abutment face.
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |