Patent US4349295A successfully refreshed from Google Patents.
US4349295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural ridge member for vibrating concrete screeds
Assignee: Amida Industries Inc
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Filing: 1981-04-06
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Granted: 1982-09-14
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Expires: 2001-04-06
Abstract
Abstract An improved frame construction for a portable, vibrating-type concrete screed incorporates a specially designed hollow ridge tube extending along the apex of an elongated open frame of triangular cross section and providing means for adjusting relative angular positions of adjoining screed units and for passage of air when the screed is air operated.
Inventors
- 👤 Donald R. Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:18
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/02; E04G21/10; B; B28; B28B; B28B1/00; B28B1/08; B28B1/093; B28B1/29; E01; E01C; E01C19/00; E01C19/22; E01C19/30; E01C19/34; E01C19/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A structural ridge member for use in air-vibrated concrete screeds of the isosceles triangle shaped, separable frame unit type, said ridge member being molded as an integral replaceable one piece member comprising: (a) a hollow strengthening ridge tube portion adapted for being horizontally positioned at the apex of an isosceles triangle shaped screed frame unit so as to extend with its bore for the length of such frame unit and being internally threaded adjacent each of its bore ends; and (b) integral with said ridge tube portion on opposite sides thereof downwardly and outwardly extending integral solid flange portions extending for the length of said ridge tube portion and having holes formed therein enabling other structural members of said frame unit to be detachably attached thereto.
Claim 2
Dependent Claim
126 words
A structural ridge member for use in air-vibrated concrete screeds of the isosceles triangle shaped, separable frame unit type, said ridge member being molded as an integral replaceable one piece member comprising: (a) a hollow strengthening ridge tube portion adapted for being horizontally positioned at the apex of an isosceles triangle shaped screed frame unit so as to extend with its bore for the length of such frame unit and being internally threaded adjacent each of its bore ends; and (b) integral with said ridge tube portion on opposite sides thereof downwardly and outwardly extending integral solid flange portions extending for the length of said ridge tube portion and having holes formed therein enabling other structural members of said frame unit to be detachably attached thereto.
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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) | 1985-09-13 | 1986-03-15 | 1986-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-13 | 1990-03-15 | 1990-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-13 | 1994-03-15 | 1994-09-14 | $7700.00 | Window Closed / Lapsed |