US4760614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drainage pipe stoppage displacer
Assignee: Individual
•
Filing: 1987-10-23
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Granted: 1988-08-02
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Expires: 2007-10-23
Abstract
Abstract A device for displacing or washing out blockages in pipe systems. The device has a central tube which can be closed with a gate valve which thereby isolates the pipe above and below the device. Fluid under pressure is introduced through a three way valve that can be positioned to direct the flow of fluid into the isolated chamber above the gate valve if that is where the blockage is or below the gate valve if the blockage is there.
Inventors
- 👤 C. L. Scott Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:16
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/032; B08B9/0321; E; E03; E03C; E03C1/00; E03C1/12; E03C1/30; E03C1/304; Y; Y10; Y10S; Y10S4/00; Y10S4/09
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
200 words
A device for removing blockage in a pipe system comprising a central tube attached at each end to the system; said central tube having an upper chamber and lower chamber and a gate valve positioned between the upper and lower chamber and having an open and closed position whereby the central tube can be closed when the gate valve is closed and thereby blocking the central tube; and upper and lower tube way each having two ends and being connected to and communicating through a three-way valve means connected to one of their ends and wherein the other end of the upper tube way is connected to and communicates with the upper chamber and the lower tube way is connected to and communicates with the lower chamber; and wherein the threeway valve has an external connector whereby fluid, under pressure can be directed into the three-way valve means and thereafter the three-way valve means can be positioned to direct fluid into either the upper or lower tube way such that when the gate valve is closed, fluid under pressure is directed toward blockages located above or below the device and displaces or washed them away so the system is opened.
Claim 2
Independent Claim
200 words
A device for removing blockage in a pipe system comprising a central tube attached at each end to the system; said central tube having an upper chamber and lower chamber and a gate valve positioned between the upper and lower chamber and having an open and closed position whereby the central tube can be closed when the gate valve is closed and thereby blocking the central tube; and upper and lower tube way each having two ends and being connected to and communicating through a three-way valve means connected to one of their ends and wherein the other end of the upper tube way is connected to and communicates with the upper chamber and the lower tube way is connected to and communicates with the lower chamber; and wherein the threeway valve has an external connector whereby fluid, under pressure can be directed into the three-way valve means and thereafter the three-way valve means can be positioned to direct fluid into either the upper or lower tube way such that when the gate valve is closed, fluid under pressure is directed toward blockages located above or below the device and displaces or washed them away so the system is opened.
Claim 3
Dependent Claim
14 words
A device as in claim 1 wherein the device is formed from plastic materials.
Claim 4
Dependent Claim
13 words
A device as in claim 1 wherein the device is made of metal.
Claim 5
Independent Claim
207 words
The method of removing blockages in a pipe system which comprises operating a device having a central tube attached at each end to the pipe system; said central tube having an upper chamber and a lower chamber and a gate valve positioned between the upper and lower chamber and having an open and closed position whereby the central tube can be closed when the gate valve is closed and thereby blocking the central tube; an upper and lower tube way each having two ends and being connected to and communicating through a three-way valve means connected to one of their ends and wherein the other end of the upper tube way is connected to and communicates with the upper chamber and the lower tube way is connected to and communicated with the lower chamber; and wherein the three-way valve has an external connector whereby fluid, under pressure can be directed into the three-way valve means and thereafter the three-way valve means can be positioned to direct fluid into either the upper or lower tube way such that when the gate valve is closed, fluid under pressure is directed toward blockages located above or below the device and displaces them away so that the pipe system is opened.
Claim 6
Independent Claim
207 words
The method of removing blockages in a pipe system which comprises operating a device having a central tube attached at each end to the pipe system; said central tube having an upper chamber and a lower chamber and a gate valve positioned between the upper and lower chamber and having an open and closed position whereby the central tube can be closed when the gate valve is closed and thereby blocking the central tube; an upper and lower tube way each having two ends and being connected to and communicating through a three-way valve means connected to one of their ends and wherein the other end of the upper tube way is connected to and communicates with the upper chamber and the lower tube way is connected to and communicated with the lower chamber; and wherein the three-way valve has an external connector whereby fluid, under pressure can be directed into the three-way valve means and thereafter the three-way valve means can be positioned to direct fluid into either the upper or lower tube way such that when the gate valve is closed, fluid under pressure is directed toward blockages located above or below the device and displaces them away so that the pipe system is opened.
Claim 7
Dependent Claim
11 words
The method according to claim 4 wherein the fluid is water.
Claim 8
Dependent Claim
11 words
The method according to claim 4 wherein the fluid is air.
Claim 9
Dependent Claim
20 words
The method according to claim 4 wherein the device is portable and is attached to the system just before use.
Claim 10
Dependent Claim
13 words
The method according to claim 4 wherein the system is a plumbing system.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |