US3876322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion drain
Assignee: Individual
•
Filing: 1974-02-21
•
Granted: 1975-04-08
•
Expires: 1994-02-21
Abstract
Abstract A drain is disclosed for separating or bordering sections of concrete and includes an elongated enclosed channel having sidewalls with dove-tail shaped indentations or keyways therein to form a water barrier and to anchor the drain in the concrete. The top of the drain includes a plurality of openings and also includes a pair of troughs extending longitudinally and bordering said openings to catch water on the drain and provide a path to the openings. The troughs also provide a longitudinally extending area of flexure together with an inverted trough on the bottom of the drain to permit the drain to be compressed and expanded when adjacent sections of concrete expand and contract.
Inventors
- 👤 Max W Deason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:28
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/10; E01C11/106; E01C11/22; E01C11/224; E01C11/227; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6803; E04B1/6804; E04H; E04H4/00; E04H4/12; E04H4/1209; E04H4/1218; E04H4/14; E04H4/141
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
A drain for separating or bordering sections of concrete comprising: a hollow elongated enclosed channel having a bottom wall, top wall, and sidewalls extending from said bottom wall to said top wall; at least one of said sidewalls including a longitudinally extending keyway therein to receive concrete when poured and thereby anchor said drain to adjacent sections of concrete and to form a water barrier preventing water from travelling downwardly along said sidewall from said top wall to said bottom wall; said top wall having a plurality of openings therein to admit water into said channel, said top wall also including a longitudinally extending trough formed therein connecting with said openings to collect water on said top wall and deliver water to said openings; said trough forming a longitudinally extending area of flexure to permit said drain to be compressed and expanded when adjacent sections of concrete expand and contract, respectively.
Claim 2
Dependent Claim
151 words
A drain for separating or bordering sections of concrete comprising: a hollow elongated enclosed channel having a bottom wall, top wall, and sidewalls extending from said bottom wall to said top wall; at least one of said sidewalls including a longitudinally extending keyway therein to receive concrete when poured and thereby anchor said drain to adjacent sections of concrete and to form a water barrier preventing water from travelling downwardly along said sidewall from said top wall to said bottom wall; said top wall having a plurality of openings therein to admit water into said channel, said top wall also including a longitudinally extending trough formed therein connecting with said openings to collect water on said top wall and deliver water to said openings; said trough forming a longitudinally extending area of flexure to permit said drain to be compressed and expanded when adjacent sections of concrete expand and contract, respectively.
Claim 3
Dependent Claim
22 words
The combination set forth in claim 1 wherein said sidewalls are parallel and wherein each said sidewall includes a longitudinally extending keyway.
Claim 4
Dependent Claim
29 words
The combination set forth in claim 1 wherein said bottom wall includes a longitudinally extending inverted trough to form a longitudinally extending area of flexure in the bottom wall.
Claim 5
Dependent Claim
40 words
The combination set forth in claim 1 wherein said top wall includes a pair of longitudinally extending troughs and wherein said openings extend from one trough to the other trough, said troughs each forming a longitudinally extending area of flexure.
Claim 6
Dependent Claim
34 words
The combination set forth in claim 4 including a pair of longitudinally extending webs positioned internally of said channel each extending from a sidewall to a bottom of a different one of said troughs.
Claim 7
Dependent Claim
29 words
The combination set forth in claim 2 wherein said bottom wall includes a longitudinally extending inverted trough to form a longitudinally extending area of flexure in the bottom wall.
Claim 8
Dependent Claim
41 words
The combination set forth in claim 6 wherein said top wall includes a pair of longitudinally extending troughs and wherein said openings extend from one trough to the other trough, said troughs each forming a longitudinally extending area of flexure; and
Claim 9
Dependent Claim
34 words
The combination set forth in claim 7 including a pair of longitudinally extending webs positioned internally of said channel each extending from a sidewall to a bottom of a different one of said troughs.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |