Patent USRE28491E successfully refreshed from Google Patents.
USRE28491E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof draining system
Assignee: —
•
Filing: 1974-07-03
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Granted: 1975-07-29
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Expires: 1994-07-03
Abstract
Abstract A roof draining system that automatically syphons water from roofs that are not completely self-draining. The system has a plurality of sumps and extending from each of said sumps are syphon pipes which connect to a common discharge pipe. The common discharge pipe is automatically primed by a control means when water has accumulated in the control sump.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:54
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/04; E04D13/0404; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2842
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
318 words
In combination with a substantially horizontal roof, a roof draining system for draining away water that accumulates on the roof, said roof draining system comprising, a. at least two sumps installed on said roof, including one of which is a control sump, b. at least two siphon pipes, each pipe having an intake end and a discharge end, the intake end of one of said pipes extending into said control sump substantially to the bottom thereof and the intake end of each of the other siphon pipes extending into one each of the other said sumps substantially to the bottoms thereof, each of said siphon pipes extending therefrom over the edge of said roof and downwardly to their respective discharge ends, c. a priming-discharge pipe for initiating the siphoning action of said siphon pipes, said priming-discharge pipe having an inlet end and a discharge end, said priming-discharge pipe extending from said inlet end across said roof and over the edge of said roof downwardly to its discharge end, the discharge end of the siphon pipe associated with said control sump being connected to the downwardly extending portion of said priming-discharge pipe between said roof edge and the discharge end of said priming-discharge pipe, and the discharge end of each of said other siphon pipes being connected to the downwardly extending portion of said priming-discharge pipe at vertically spaced intervals between the connecting point of said first connected siphon pipe and the discharge end of said priming-discharge pipe, d. means for introducing water into the inlet end of said priming-discharge pipe connected to said means, e. a water detecting probe extending into the control sump in spaced relation with the bottom of said control sump, and f. control means operatively connected to said probe, said control means connected to and actuating said means for introducing water to said priming-discharge pipe when said probe detects water in said control sump.
Claim 2
Dependent Claim
318 words
In combination with a substantially horizontal roof, a roof draining system for draining away water that accumulates on the roof, said roof draining system comprising, a. at least two sumps installed on said roof, including one of which is a control sump, b. at least two siphon pipes, each pipe having an intake end and a discharge end, the intake end of one of said pipes extending into said control sump substantially to the bottom thereof and the intake end of each of the other siphon pipes extending into one each of the other said sumps substantially to the bottoms thereof, each of said siphon pipes extending therefrom over the edge of said roof and downwardly to their respective discharge ends, c. a priming-discharge pipe for initiating the siphoning action of said siphon pipes, said priming-discharge pipe having an inlet end and a discharge end, said priming-discharge pipe extending from said inlet end across said roof and over the edge of said roof downwardly to its discharge end, the discharge end of the siphon pipe associated with said control sump being connected to the downwardly extending portion of said priming-discharge pipe between said roof edge and the discharge end of said priming-discharge pipe, and the discharge end of each of said other siphon pipes being connected to the downwardly extending portion of said priming-discharge pipe at vertically spaced intervals between the connecting point of said first connected siphon pipe and the discharge end of said priming-discharge pipe, d. means for introducing water into the inlet end of said priming-discharge pipe connected to said means, e. a water detecting probe extending into the control sump in spaced relation with the bottom of said control sump, and f. control means operatively connected to said probe, said control means connected to and actuating said means for introducing water to said priming-discharge pipe when said probe detects water in said control sump.
Claim 3
Dependent Claim
26 words
The roof draining system as specified in claim 1 having timing means for terminating the introduction of water into the inlet end of said priming-discharge pipe.
Claim 4
Dependent Claim
43 words
The roof draining system as specified in claim 1 wherein, the siphon pipe associated with said control sump slopes downwardly from a point above said sump toward the edge of said substantially horizontal roof to prevent backflow of water into said control sump.
Claim 5
Dependent Claim
134 words
In combination with a roof structure having a plurality of liquid accumulating areas defining sump means, a roof draining system comprising a plurality of interconnecting pipe means coupled individually at least one each to said sump means; a generally vertically located discharge pipe means mounted adjacent to said roof structure, a plurality of interconnecting pipe means connected to said sump means and to said discharge pipe means and being connected to said discharge pipe means in vertically staggered relation to each other to maintain siphon action independently of each other, and initiating means to introduce liquid into said discharge pipe means for initiating a downward flow of liquid through said pipe means from the uppermost of said connecting pipe means to thereby initiate a siphon action for withdrawing water from said several sump means.
Claim 6
Dependent Claim
134 words
In combination with a roof structure having a plurality of liquid accumulating areas defining sump means, a roof draining system comprising a plurality of interconnecting pipe means coupled individually at least one each to said sump means; a generally vertically located discharge pipe means mounted adjacent to said roof structure, a plurality of interconnecting pipe means connected to said sump means and to said discharge pipe means and being connected to said discharge pipe means in vertically staggered relation to each other to maintain siphon action independently of each other, and initiating means to introduce liquid into said discharge pipe means for initiating a downward flow of liquid through said pipe means from the uppermost of said connecting pipe means to thereby initiate a siphon action for withdrawing water from said several sump means.
Claim 7
Dependent Claim
54 words
The apparatus of claim 4 wherein one of said sump means constitutes a control sump means having detection means for detecting the level of the liquid therein; and said initiating means having automatic operating means coupled to said detection means and introducing of liquid into said discharge pipe means for creating said downward flow.
Claim 8
Dependent Claim
27 words
The combination of claim 4 wherein said initiating means includes a timing means for terminating activation of said initiating means after predetermined initiation of said downward flow.
Claim 9
Dependent Claim
28 words
The combination of claim 4 wherein said connecting pipe means from said control sump means constitutes the vertically uppermost pipe connection to said vertically located discharge pipe means.
Claim 10
Dependent Claim
43 words
The combination of claim 4 wherein said vertical pipe means is located immediately adjacent to the outer wall of said building and said interconnecting pipe means include vertical extending terminal portions extended downwardly into aligned vertically spaced relation to said discharge pipe means.
References Cited (Backward Citations)
DE333694C
Cited
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 |