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US3757812A Expired / Lapsed US ⏱️ 0.0 years remaining

Roof standing water eliminator

Assignee: Individual
•
Filing: 1972-01-03
•
Granted: 1973-09-11
•
Expires: 1992-01-03
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Abstract

Abstract An apparatus for draining standing water from low areas in a flat roof surface. The apparatus is contained in a housing whose base is closed and is sealed in such a low area. Water accumulated on the roof surface draining into such a low area flows into the housing of the invention through appropriate holes formed therein. A float arrangement within the housing senses accumulated water and activates a pump therein to exhaust through a drain line water from the roof area. The float arrangement senses the exhaustion of accumulated water from the low spot and automatically cuts off electrical power to the pump turning off the system until another water accumulation is sensed. A heating arrangement, combining a thermostat with a source of electrical energy that is distinct from the electrical flow through the float arrangement and pump, is provided within the housing to protect against freezing. The standing water eliminator is arranged to exhaust water from a roof surface through a main discharge line leading from the roof surface. Suction lines coming from other low areas on the roof surface, connected to the main line at a point below the roof eave, so that when water flows through the main discharge line each suction line has a suction created therein, that draws water through the line into the main discharge line. Siphon flow through each of the suction lines, once begun, will continue until water is eliminated from the low area within which the suction line is positioned.

Inventors

  • 👤 J Duncan

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 13:49
CPC Classifications
F; F04; F04F; F04F10/00; E; E04; E04D; E04D13/00; E04D13/04; E04D13/0404; E04D13/0409; F04B; F04B49/00; F04B49/02; F04B49/025; F04D; F04D29/00; F04D29/58; F04D29/586; E04D2013/0418; E04D2013/0427; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2842

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 154 words
A roof standing water eliminator comprising a housing having openings formed in its sides that allow passage of water therethrough; a sump in the housing beneath said openings; a liquid pump mounted within said housing arranged so that its inlet admits water coming into said sump; a sensor means within the sump for sensing water accumulations therein and regulating operations of said liquid pump to evacuate said water accumulations and to cease pumping operations when the water is evacuated from the housing; a discharge line having one end connected to the outlet of said pump with a water drain means for evacuating and its other end discharging water from a roof surface; and an outwardly projecting collar means fixed to the housing below said housing openings and above said sump for securing said housing in sealing arrangement within a surrounding roof surface where-by water on the roof surface enters said sump through said openings.
Claim 2
Dependent Claim 154 words
A roof standing water eliminator comprising a housing having openings formed in its sides that allow passage of water therethrough; a sump in the housing beneath said openings; a liquid pump mounted within said housing arranged so that its inlet admits water coming into said sump; a sensor means within the sump for sensing water accumulations therein and regulating operations of said liquid pump to evacuate said water accumulations and to cease pumping operations when the water is evacuated from the housing; a discharge line having one end connected to the outlet of said pump with a water drain means for evacuating and its other end discharging water from a roof surface; and an outwardly projecting collar means fixed to the housing below said housing openings and above said sump for securing said housing in sealing arrangement within a surrounding roof surface where-by water on the roof surface enters said sump through said openings.
Claim 3
Dependent Claim 85 words
A roof standing water eliminator as recited in claim 1, wherein the sensor means comprises a float arranged to move vertically, floating on water accumulated within the housing; an arm, rotatably mounted to the housing, whose one end is connected to said float moving vertically therewith; and a conductive fluid filled switch fixed to the other end of said arm that is arranged to pass an electrical current when said float is elevated, and to cut off electrical current flow when said float is lowered.
Claim 4
Dependent Claim 51 words
A roof standing water eliminator as recited in claim 2, further including means associated with the float and the arm for allowing some water buildup within the housing prior to said arm being elevated to in turn displace the conductive fluid filled switch to pass electrical current to the liquid pump.
Claim 5
Dependent Claim 44 words
A roof standing water eliminator as recited in claim 1, further including heat generation means within the housing for supplying, on command from a temperature sensing means, heat to the liquid pump and sensor means when the temperature is below a set minimum limit.
Claim 6
Dependent Claim 29 words
A roof standing water eliminator as recited in claim 4, wherein the heat generation means consists of electrical heating tape wrapped around the non-moving parts of the liquid pump.
Claim 7
Dependent Claim 78 words
A roof standing water eliminator as recited in claim 1, fUrther including at least one siphon line having one of its ends positioned within a low spot in the roof surface, arranged such that water accumulated therein covers said siphon line end, with the other end of said siphon line connected to the main discharge line at a point in the line that is below the eave of the roof surface on which the water eliminator is positioned.

References Cited (Backward Citations)

US2496467A Cited
US2431640A Cited
US2549204A Cited
US2739662A Cited
US2912143A Cited
US3692040A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-09-10 1977-03-12 1977-09-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-09-10 1981-03-12 1981-09-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-09-10 1985-03-12 1985-09-11 $7700.00 Window Closed / Lapsed

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