US3737964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanded structural members
Assignee: Jury & Spiers Pty Ltd
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Filing: 1971-07-27
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Granted: 1973-06-12
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Expires: 1991-07-27
Abstract
Abstract A method of forming an expanded structural member, and a structural member formed thereby, wherein spaced parallel longitudinally extending rows of openings are pierced in a web of a member of ductile metal which has a constant cross-sectional shape, the openings of each row overlapping those of the next adjacent row so as to form a series of strut forming elements in the web, forcing the parallel edges of the member apart so as to stretch the elements and thus form struts, the edge portions thereby becoming chords, and positioning load transmitting members between chords so as to transmit load imposed on one of the chords to the other chord.
Inventors
- 👤 H Jury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:38
CPC Classifications
B; B21; B21D; B21D47/00; B21D47/01; B21D47/02; E; E04; E04C; E04C3/00; E04C3/02; E04C3/04; E04C3/08; E04C3/083; E04C3/29; E04C3/292; E04C2003/0404; E04C2003/0408; E04C2003/0413; E04C2003/0421; E04C2003/0426; E04C2003/043; E04C2003/0434; E04C2003/0443; E04C2003/0452; E04C2003/0465; Y; Y10; Y10T; Y10T29/00; Y10T29/18; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49625
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
199 words
The method of forming an expanded structural member which comprises extruding a member of ductile metal having a constant cross-sectional shape which comprises a pair of spaced parallel longitudinally ex-tending edge portions, a web joining the edge portions, and at least one rib extending along the web, at least partly piercing at least two spaced parallel longitudinally extending rows of openings in the web, each opening being a slot having parallel sides and curved ends, the openings of each row overlapping those of the next adjacent row so as to form therebetween a series of deformable elements of the web interconnected by junction portions, said deformable elements each comprising portion of a said rib, urging the edge portions apart so as to extend the length of the deformable elements to thereby form struts and form chords of the edge portions, and positioning at least one load transmitting member between the chords, and securing opposite ends of the load transmitting member in load transmitting relationship with the chords to thereby transmit at least a portion of a load imposed on one of the chords in the direction of the other chord to said other chord through said load transmitting member.
Claim 2
Independent Claim
199 words
The method of forming an expanded structural member which comprises extruding a member of ductile metal having a constant cross-sectional shape which comprises a pair of spaced parallel longitudinally ex-tending edge portions, a web joining the edge portions, and at least one rib extending along the web, at least partly piercing at least two spaced parallel longitudinally extending rows of openings in the web, each opening being a slot having parallel sides and curved ends, the openings of each row overlapping those of the next adjacent row so as to form therebetween a series of deformable elements of the web interconnected by junction portions, said deformable elements each comprising portion of a said rib, urging the edge portions apart so as to extend the length of the deformable elements to thereby form struts and form chords of the edge portions, and positioning at least one load transmitting member between the chords, and securing opposite ends of the load transmitting member in load transmitting relationship with the chords to thereby transmit at least a portion of a load imposed on one of the chords in the direction of the other chord to said other chord through said load transmitting member.
Claim 3
Dependent Claim
33 words
The method according to claim 1 wherein said load transmitting member is a plate, and the method comprises the further step of securing the plate along two opposite edges to respective edge portions.
Claim 4
Dependent Claim
85 words
The method according to claim 2 wherein said chords comprise flanges each having two pairs of inwardly directed beads with a pair on each side of said struts, each pair of inwardly directed beads forming a channel therebetween, said method comprising the further step of straining the struts, positioning each of two said plates between the channels on respective sides of the struts, and releasing the strain on the struts whereby the resilience of the struts retains the edges of the plates in respective channels.
Claim 5
Dependent Claim
53 words
The method according to claim 1 wherein each load transmitting member is a stiff spacer member extending between the chords, the method further comprising engaging at least one end of each load transmitting member with one of the chords at the location of a junction portion between that chord and a said strut.
Claim 6
Dependent Claim
28 words
The method according to claim 4 wherEin flanges comprise said chords, the method further comprising interpositioning each said stiff spacer member between the flanges and securing it thereto.
Claim 7
Dependent Claim
38 words
The method according to claim 4 wherein each spacer member contains grooves in its ends, the method further comprising positioning the grooves over the struts at the location of junction portions between the struts and the edge portions.
Claim 8
Dependent Claim
14 words
The method according to claim 4 wherein said spacer members are formed of timber.
Claim 9
Dependent Claim
20 words
The method according to claim 4 wherein said spacer members are formed of tubular metal having a square cross-sectional shape.
Claim 10
Dependent Claim
15 words
The method according to claim 1 wherein the edge portions are channels which contain timber.
Claim 11
Dependent Claim
85 words
The method according to claim 1 comprising at least partly piercing more than two said spaced parallel longitudinally extending rows of openings in the web to thereby form a plurality of said series of deformable elements of the web interconnected by said junction portions, and urging the edge portions apart so as to extend the lengths of the deformable elements to thereby form a plurality of struts interconnected by said junction portions and having the central axes of the struts intersecting in the junction portions.
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |