US4098555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for joining two structural parts
Assignee: Rio Tinto Switzerland AG
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Filing: 1976-03-02
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Granted: 1978-07-04
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Expires: 1996-03-02
Abstract
Abstract A device for joining the frames of structural units which are structural units having undercut grooves. The device is provided engages itself in these grooves, and is preferably in the form of a spindle consisting of two parts which rotate with respect to each other on a common threaded shaft or axis. By rotating the defice each of the two parts anchors itself firmly into the undercut grooves in the frames which may be metal sections thus holding the frames together.
Inventors
- 👤 Karl Vollenweider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:45
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/68; E04; E04B; E04B2/00; E04B2/88; E04B2/96; E04B2/967; E06B3/04; E06B3/263; E06B3/26338; Y; Y10; Y10T; Y10T403/00; Y10T403/33; Y10T403/335
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
102 words
A device for releasably joining together two abutting structural unit frames, the facing sides of which are provided with grooves, undercut on each side thereof, in which the device engages, comprising a spindle, one end of which carries releasable means adapted to engage the undercut of a groove of said frame, and the other end of which carries a parallelopipedon of transverse rhomboidal cross-section rigidly and transversely attached thereto, the diagonal of said parallelopipedon being sufficiently long so that said parallelopipedon, when centered axially in said groove, engages the shoulders of said undercut when said spindle is rotated less than 1/4 revolution.
Claim 2
Independent Claim
102 words
A device for releasably joining together two abutting structural unit frames, the facing sides of which are provided with grooves, undercut on each side thereof, in which the device engages, comprising a spindle, one end of which carries releasable means adapted to engage the undercut of a groove of said frame, and the other end of which carries a parallelopipedon of transverse rhomboidal cross-section rigidly and transversely attached thereto, the diagonal of said parallelopipedon being sufficiently long so that said parallelopipedon, when centered axially in said groove, engages the shoulders of said undercut when said spindle is rotated less than 1/4 revolution.
Claim 3
Dependent Claim
37 words
A device according to claim 1, wherein said releasable means is a part having two parallel fork-like arms provided with snap-fit projections on their outward-facing sides adapted to engage the shoulders of said undercut with a snap-fit.
Claim 4
Dependent Claim
60 words
A device according to claim 1, wherein said spindle is cut transversely at its mid-point and the resulting halves are joined by an interior axial bolt, said bolt being fixed into and projecting from one of said halves and being retained in said other half by axial threads therein, whereby the two halves are rotatable with respect to each other.
Claim 5
Dependent Claim
35 words
A device, as claimed in claim 1, wherein the spindle carrying said parallelopipedon carries flat opposite sides, whereby said spindle can be rotated by a thin wrench when said device joins two undercut grooved frames.
Claim 6
Dependent Claim
46 words
A device, as claimed in claim 1, wherein the part of said spindle which carries said parallelopipedon carries a lamina projecting transversely from and perpendicular to the long axis of said spindle, whereby said spindle can be rotated when said device joins two undercut grooved frames.
References Cited (Backward Citations)
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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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |