US3958313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method, apparatus and product for improved pipe-to-manhole sealing
Assignee: MERCHANTS NATIONAL BANK OF MANCHESTER
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Filing: 1974-06-05
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Granted: 1976-05-25
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Expires: 1994-06-05
Abstract
Abstract An underground joint between sewer pipe and reinforced concrete manhole riser is tightly sealed, and resistant to breakage caused by settling or frost heaving by a tapered, elastomeric, tubular connector boot, capable of flexing and yielding under lateral shift. A smooth faced hole is core drilled in the riser wall. The large end of the boot is expanded radially, by an expandable metal band, to a permanently enlarged diameter and internally clamped within the hole which compresses the material of the boot against the hole surface at 1000 psi, or more. The band is expanded and clamped in a direction normal to the central longitudinal axis of the sleeve by hydraulic jack means. The pipe end is inserted in the boot, up to the inside wall of the manhole, but is yieldable in any direction without leakage or breakage.
Inventors
- 👤 John C. Rossborough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:20
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/02; E03F5/021; F; F16; F16L; F16L21/00; F16L21/002; F16L41/00; F16L41/002; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49826; Y10T29/49879; Y10T29/53; Y10T29/5367
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
206 words
A method of yieldably and flexibly connecting a section of sewer pipe into a side wall of a manhole riser, vertically disposed in a sewer line trench, in which the sewer pipe is received at one side thereof, by means of a flexible tubular connector boot, said method comprising the steps of: determining a point of reference on the outer surface of the manhole riser through which the central longitudinal axis of the sewer pipe is to be located; core drilling the reinforced concrete wall of said riser along a circular path of coring, whose centre coincides with the said point of reference, to form a sewer pipe porthole, of predetermined greater diameter than the diameter of said pipe, defined by an exposed, smooth, circular edge surface; inserting one end of said connector boot in a loose fit in said porthole, then expanding said end radially in a direction normal to the axis of said porthole and internally clamping said expanded end against the smooth surface of said porthole to seal the same; then inserting the inner end of said section of sewer pipe into said boot and inside the pipe porthole, and then externally clamping the opposite end of said boot around said pipe section.
Claim 2
Independent Claim
206 words
A method of yieldably and flexibly connecting a section of sewer pipe into a side wall of a manhole riser, vertically disposed in a sewer line trench, in which the sewer pipe is received at one side thereof, by means of a flexible tubular connector boot, said method comprising the steps of: determining a point of reference on the outer surface of the manhole riser through which the central longitudinal axis of the sewer pipe is to be located; core drilling the reinforced concrete wall of said riser along a circular path of coring, whose centre coincides with the said point of reference, to form a sewer pipe porthole, of predetermined greater diameter than the diameter of said pipe, defined by an exposed, smooth, circular edge surface; inserting one end of said connector boot in a loose fit in said porthole, then expanding said end radially in a direction normal to the axis of said porthole and internally clamping said expanded end against the smooth surface of said porthole to seal the same; then inserting the inner end of said section of sewer pipe into said boot and inside the pipe porthole, and then externally clamping the opposite end of said boot around said pipe section.
Claim 3
Dependent Claim
60 words
A method according to claim 1 wherein: said step of expanding said end of said boot, and internally clamping the same, consists in expanding an internal clamping band against the inside of the boot to increase the diameter of the band and thereby compress the material of the boot against the edge surface of the porthole in a radial direction.
Claim 4
Dependent Claim
36 words
A method according to claim 2 wherein: the internal clamping band is expanded by fluid pressure actuated means, the fluid pressure being exerted radially of said porthole, at a clamping pressure of at least 1000 psi.
Claim 5
Dependent Claim
43 words
A method according to claim 1 wherein: said expansion and clamping steps are accomplished by expanding a clamp band, having a pair of toggle arms, by means of an hydraulic jack applied against the toggle arms, to increase the diameter of the band.
Claim 6
Dependent Claim
31 words
A method according to claim 4 wherein: the toggle arms are moved through an over centre path of travel into a locked position in which internal clamping pressure is constantly maintained.
Claim 7
Dependent Claim
130 words
In a method of yieldably and flexibly joining together a pipe member and an enclosure member having an opening defined by a circular edge by means of a flexible tubular connector member the steps of: loosely fitting one end of said tubular connector member inside the opening; then internally clamping said end of the tubular connector member against the circular edge in sealed relationship therewith, by pressure exerted radially of said opening and normal to the axis of said tubular connector member; then inserting an end portion of the said pipe inside the tubular connector member to extend well within said opening and up to the end of said tubular member, and thereafter externally clamping an opposite end of the tubular connecting member around the outer surface of said pipe.
Claim 8
Dependent Claim
130 words
In a method of yieldably and flexibly joining together a pipe member and an enclosure member having an opening defined by a circular edge by means of a flexible tubular connector member the steps of: loosely fitting one end of said tubular connector member inside the opening; then internally clamping said end of the tubular connector member against the circular edge in sealed relationship therewith, by pressure exerted radially of said opening and normal to the axis of said tubular connector member; then inserting an end portion of the said pipe inside the tubular connector member to extend well within said opening and up to the end of said tubular member, and thereafter externally clamping an opposite end of the tubular connecting member around the outer surface of said pipe.
Claim 9
Independent Claim
130 words
A method of attaching a flexible tubular connector member to an enclosure body having a hole therein which comprises the steps of: locating an end of the flexible tubular connector member in the hole; then applying pressure in a radial direction, normal to the axis of said hole and to the axis of said connector member, against the inner surface of said connector member to expand the said end thereof into tightly sealed engagement with the edge ofthe hole, and internally clamping said end in said expanded, tightly, sealed condition within said hole, said steps of expanding and clamping being accomplished by hydraulic jack pressure exerted against the toggle arms of a split clamp band until the toggle arms are moved radially outwardly beyond centre to a locked expanded position.
Claim 10
Independent Claim
130 words
A method of attaching a flexible tubular connector member to an enclosure body having a hole therein which comprises the steps of: locating an end of the flexible tubular connector member in the hole; then applying pressure in a radial direction, normal to the axis of said hole and to the axis of said connector member, against the inner surface of said connector member to expand the said end thereof into tightly sealed engagement with the edge ofthe hole, and internally clamping said end in said expanded, tightly, sealed condition within said hole, said steps of expanding and clamping being accomplished by hydraulic jack pressure exerted against the toggle arms of a split clamp band until the toggle arms are moved radially outwardly beyond centre to a locked expanded position.
Claim 11
Dependent Claim
143 words
Apparatus for sealably and flexibly joining together a pipe member and an enclosure body formed with a hole which is defined by a circular edge, said apparatus comprising: a flexible, elongated, tapered, tubular boot of elastic, rubber-like material, having a small cylindrical, pipe-clamping end, a large cylindrical hole-clamping end and a tapered portion extending between said ends to provide for flexing displacement of one end with respect to the other, external clamping means mounted around the pipe clamping end; internal clamping means supported inside the hole clamping end, said means including a radially expandable clamp means adapted to increase in diameter and lock in increased diameter condition; and a fluid pressure actuated member, mounted within the hole clamping end of said boot, and in engagement with said expandable clamp means for applying pressure thereto to expand and seal said end in said hole.
Claim 12
Dependent Claim
143 words
Apparatus for sealably and flexibly joining together a pipe member and an enclosure body formed with a hole which is defined by a circular edge, said apparatus comprising: a flexible, elongated, tapered, tubular boot of elastic, rubber-like material, having a small cylindrical, pipe-clamping end, a large cylindrical hole-clamping end and a tapered portion extending between said ends to provide for flexing displacement of one end with respect to the other, external clamping means mounted around the pipe clamping end; internal clamping means supported inside the hole clamping end, said means including a radially expandable clamp means adapted to increase in diameter and lock in increased diameter condition; and a fluid pressure actuated member, mounted within the hole clamping end of said boot, and in engagement with said expandable clamp means for applying pressure thereto to expand and seal said end in said hole.
Claim 13
Dependent Claim
116 words
A flexible connector for sealably joining together a pipe member and an enclosure body having a hole formed therein, said connector comprising: an elongated, flexible, tapered tubular sleeve of elastomeric material having a small pipe-clamping end and a large hole-clamping end, each of predetermined diameter, external clamping means for sealably securing said small pipe-clamping end around the outside of a pipe member and internal clamping means, mounted within said large, hole-clamping end, including an internal, split clamping band and means for expanding the band radially to increase its diameter and compress the material of the connector against the said edge of said hole for internally clamping the hole clamping end of said sleeve inside said hole.
Claim 14
Dependent Claim
116 words
A flexible connector for sealably joining together a pipe member and an enclosure body having a hole formed therein, said connector comprising: an elongated, flexible, tapered tubular sleeve of elastomeric material having a small pipe-clamping end and a large hole-clamping end, each of predetermined diameter, external clamping means for sealably securing said small pipe-clamping end around the outside of a pipe member and internal clamping means, mounted within said large, hole-clamping end, including an internal, split clamping band and means for expanding the band radially to increase its diameter and compress the material of the connector against the said edge of said hole for internally clamping the hole clamping end of said sleeve inside said hole.
Claim 15
Dependent Claim
36 words
A flexible connector as specified in claim 9 wherein: said internal, split, clamping band includes a pair of toggle arms pivotally attached and movable through an overcentre path of travel into a clamped, locked, expanded, position.
Claim 16
Dependent Claim
37 words
A flexible connector as specified in claim 9 wherein: said sleeve includes an annular groove extending circumferentially around the inner face of the said hole clamping end; and said split clamping band is received in said groove.
Claim 17
Dependent Claim
161 words
In combination: a reinforced concrete manhole riser having an upstanding cylindrical wall with an inner face and a smooth surfaced, circular, cored hole of predetermined diameter, a sewer pipe having one end, of predetermined diameter substantially less than the diameter of said hole, received within said hole substantially flush with said inner face of said riser, a tubular, elastic, flexible sleeve, or boot, having a large end loosely fitting in said hole, an opposite small end loosely fitting around said sewer pipe and a tapered portion between said ends, external clamp means extending around the small end of said sleeve for clamping said end tightly, and sealably, around said pipe, internal clamp means extending circumferentially around the inside of the large end of said sleeve, said means having a normal unexpanded diameter but being locked in an expanded condition to compress the material of said sleeve against the smooth surface of said hole to seal and clamp said large end therein.
Claim 18
Dependent Claim
161 words
In combination: a reinforced concrete manhole riser having an upstanding cylindrical wall with an inner face and a smooth surfaced, circular, cored hole of predetermined diameter, a sewer pipe having one end, of predetermined diameter substantially less than the diameter of said hole, received within said hole substantially flush with said inner face of said riser, a tubular, elastic, flexible sleeve, or boot, having a large end loosely fitting in said hole, an opposite small end loosely fitting around said sewer pipe and a tapered portion between said ends, external clamp means extending around the small end of said sleeve for clamping said end tightly, and sealably, around said pipe, internal clamp means extending circumferentially around the inside of the large end of said sleeve, said means having a normal unexpanded diameter but being locked in an expanded condition to compress the material of said sleeve against the smooth surface of said hole to seal and clamp said large end therein.
Claim 19
Dependent Claim
142 words
A connector boot device for sealably joining a pipe to a reinforced concrete manhole riser formed with a hole which is defined by a smooth, core-drilled, circular edge, said connector boot device comprising a flexible, elastomeric, elongated tubular body having a large holeclamping end of substantially less outside diameter than the inside diameter of said hole; a smaller pipe-clamping end and an intermediate tapered body portion extending between said ends; internal clamping means mounted inside said hole clamping end for expanding said end radially, in a direction normal to the central longitudinal axis of said body to compress and clamp the material thereof against the smooth circular edge of said hole in clamped, tightly sealed relation therewith and external clamping means, mounted around the small pipe clamping end of the connector boot device for sealably clamping said end around said pipe member.
Claim 20
Dependent Claim
142 words
A connector boot device for sealably joining a pipe to a reinforced concrete manhole riser formed with a hole which is defined by a smooth, core-drilled, circular edge, said connector boot device comprising a flexible, elastomeric, elongated tubular body having a large holeclamping end of substantially less outside diameter than the inside diameter of said hole; a smaller pipe-clamping end and an intermediate tapered body portion extending between said ends; internal clamping means mounted inside said hole clamping end for expanding said end radially, in a direction normal to the central longitudinal axis of said body to compress and clamp the material thereof against the smooth circular edge of said hole in clamped, tightly sealed relation therewith and external clamping means, mounted around the small pipe clamping end of the connector boot device for sealably clamping said end around said pipe member.
Claim 21
Dependent Claim
36 words
A connector boot device as specified in claim 13 wherein: the pipe-clamping end is of a reduced diameter to support an inner end of the pipe inside the tubular connector in substantially concentrically spaced relation therewith.
Claim 22
Dependent Claim
42 words
A connector boot device as specified in claim 13 wherein: the said intermediate body portion is of truncated conical shape defining a clearance space in which displacement of the pipe out of its concentrically disposed position may occur without blocking flow therethrough.
Claim 23
Dependent Claim
132 words
A connector boot device for sealably joining together a manhole riser having a porthole formed therein and a pipe section having one end positioned within the porthole, said device including: an elongated, tapered flexible tubular body having a large cylinderical end, of predetermined diameter, loosely fitting within said hole, and having a central, longitudinal axis: a truncated conical intermediate portion of said body, extending away from said large cylindrical end and terminating in a small cylindrical end engageable around said pipe section; the large cylindrical end of said body being internally recessed to form an annular channel, or groove, and having an internal expandable clamp band supported in said channel and in full, radially expanded, locked position to exert clamping pressure in a direction normal to the said axis of said body.
Claim 24
Dependent Claim
132 words
A connector boot device for sealably joining together a manhole riser having a porthole formed therein and a pipe section having one end positioned within the porthole, said device including: an elongated, tapered flexible tubular body having a large cylinderical end, of predetermined diameter, loosely fitting within said hole, and having a central, longitudinal axis: a truncated conical intermediate portion of said body, extending away from said large cylindrical end and terminating in a small cylindrical end engageable around said pipe section; the large cylindrical end of said body being internally recessed to form an annular channel, or groove, and having an internal expandable clamp band supported in said channel and in full, radially expanded, locked position to exert clamping pressure in a direction normal to the said axis of said body.
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) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |