US4782637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame structure
Assignee: Bahco Ventilation AB
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Filing: 1987-03-31
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Granted: 1988-11-08
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Expires: 2007-03-31
Abstract
Abstract A frame structure for the construction of a box-shaped casing, in particular for air treatment devices. The frame structure comprises straight profile members (22), on the one hand, and corner elements (50,52) with three mutually perpendicular protrusions, each being connectable to one of said profile elements, on the other hand. Each corner element consists of two parts, namely an external part (50) including the external portions (50a, 50b,50c) of said protrusions and an internal part (52) including the internal portions (52a,52b,52c) of the protrusions. Said protrusion portions together form a closed cross-section fitting internally into the likewise closed cross-section of the profile members (b 22). The profile members can be slid onto the corner element protrusions while simultaneously securing the external and internal corner element parts (50,52).
Inventors
- 👤 Arne Eriksson
- 👤 Weine Hammarberg
- 👤 Kurt Pettersson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:38
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/0442; E; E04; E04B; E04B1/00; E04B1/348; E04B1/34815; E04B1/3483; E04H; E04H1/00; E04H1/12; E04H1/1205; E04H1/1238; F24F13/00; F24F13/20; E04B1/18; E04B1/24; E04B1/2403; E04B2001/2406; E04B2001/2409; F24F2221/00; F24F2221/36; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/342; Y10T403/343; Y10T403/347
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
A corner frame structure of a casing, consisting of: a single corner element having three mutually perpendicular identical protrusions, each protrusion having a substantially closed, longitudinally constant cross section and consisting of an external and internal part of said corner element; and three straight profile members, each profile member having a substantially closed longitudinally constant cross section snugly externally fitted onto the respective protrusion to thereby secure the external and internal parts to each other.
Claim 2
Dependent Claim
75 words
A corner frame structure of a casing, consisting of: a single corner element having three mutually perpendicular identical protrusions, each protrusion having a substantially closed, longitudinally constant cross section and consisting of an external and internal part of said corner element; and three straight profile members, each profile member having a substantially closed longitudinally constant cross section snugly externally fitted onto the respective protrusion to thereby secure the external and internal parts to each other.
Claim 3
Dependent Claim
16 words
A frame structure according to claim 1, wherein the internal part partially overlaps the external part.
Claim 4
Dependent Claim
16 words
A frame structure according to claim 1, wherein each internal part has an essentialy L-shaped cross-section.
Claim 5
Dependent Claim
35 words
A frame structure according to claim 1, wherein complementarily formed portions of the profile members and the internal part of the corner element form snap-locking means securing the respective profile member to the corner element.
Claim 6
Dependent Claim
16 words
A frame structure according to claim 1, wherein the profile members have a substantially square cross-section.
Claim 7
Dependent Claim
43 words
A frame structure according to claim 1, wherein each profile member has a flange at an external corner edge, said flange serving as a guide means for a guide engagement rod for coupling the frame structure to another frame structure of the casing.
Claim 8
Dependent Claim
26 words
A frame structure according to claim 1, wherein each profile member has a step-like shoulder for receiving a flange of a wall element of the casing.
Claim 9
Dependent Claim
18 words
A frame structure according to claim 1, wherein said profile members and said corner element consist of metal.
Claim 10
Dependent Claim
25 words
A frame structure according to claim 8, wherein each profile member is a rolled integral piece, and the corner element parts are bent metal pieces
References Cited (Backward Citations)
US2364083A
Cited
CH396345A
Cited
US3272582A
Cited
US3353854A
Cited
FR1580999A
Cited
GB2040386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |