US3896597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete expansion and contraction joint
Assignee: Individual
•
Filing: 1974-04-04
•
Granted: 1975-07-29
•
Expires: 1994-04-04
Abstract
Abstract A concrete expansion and contraction joint is described incorporating an upper and lower section detachably engaged and including longitudinally extending water blocking anchors. The bottom wall of the upper section incorporates a V-shape having a contractual crack inducing edge; a pair of longitudinally extending channels are provided in the upper section beneath the water blocking anchors for receiving locking flanges positioned along the upper edges of the lower section. The flanges engage the channels to lock upper and lower sections into a unitary structure.
Inventors
- 👤 Max W Deason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:10
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/10; E01C11/106; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6803
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
142 words
A concrete expansion/contraction joint comprising: a. an elongated upper section having a top wall and two side walls depending from said top wall; b. a pair of water blocking anchors each extending outwardly from a side wall and longitudinally along said side wall; means forming longitudinally extending channels in each of said side walls beneath said water blocking anchors; c. a bottom joining said side walls, said bottom including means for inducing a contractual crack; and d. an elongated lower section having two side walls, a bottom wall and an open top; a pair of longitudinally extending inwardly directed locking flanges positioned adjacent said open top, engaging said longitudinally extending channels to lock said upper and lower sections together and enclosing said contractual crack inducing means to form a unitary structure; said upper and lower sections when embedded in concrete being inseparable.
Claim 2
Dependent Claim
142 words
A concrete expansion/contraction joint comprising: a. an elongated upper section having a top wall and two side walls depending from said top wall; b. a pair of water blocking anchors each extending outwardly from a side wall and longitudinally along said side wall; means forming longitudinally extending channels in each of said side walls beneath said water blocking anchors; c. a bottom joining said side walls, said bottom including means for inducing a contractual crack; and d. an elongated lower section having two side walls, a bottom wall and an open top; a pair of longitudinally extending inwardly directed locking flanges positioned adjacent said open top, engaging said longitudinally extending channels to lock said upper and lower sections together and enclosing said contractual crack inducing means to form a unitary structure; said upper and lower sections when embedded in concrete being inseparable.
Claim 3
Dependent Claim
30 words
The combination as set forth in claim 1 wherein said contractual crack inducing means is a longitudinally extending edge formed as part of a V-shaped bottom of said upper section.
Claim 4
Dependent Claim
37 words
The combination as set forth in claim 1 wherein said upper and lower sections each include longitudinally extending trough shaped internal webs extending from one side wall to the other to permit said joint to be compressed.
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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |