US3212519A - Internested elliptical manhole sections with stub conduits and an auxiliary conduit - Google Patents

Internested elliptical manhole sections with stub conduits and an auxiliary conduit Download PDF

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US3212519A
US3212519A US204497A US20449762A US3212519A US 3212519 A US3212519 A US 3212519A US 204497 A US204497 A US 204497A US 20449762 A US20449762 A US 20449762A US 3212519 A US3212519 A US 3212519A
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sections
section
elliptical
conduit
internested
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US204497A
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Clayton F Paschen
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/121—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the connection between shaft elements, e.g. of rings forming said shaft
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/122—Steps or handrails for shafts
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
    • E06C9/02—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes rigidly mounted
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/6851—With casing, support, protector or static constructional installations
    • Y10T137/6966—Static constructional installations
    • Y10T137/6991—Ground supporting enclosure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86292—System with plural openings, one a gas vent or access opening
    • Y10T137/863—Access and outlet

Definitions

  • the aforesaid auxiliary internally disposed components may be disposed in the most secure areas, namely adjacent one or both of the vertices of the ellipse.
  • FIG. 1 is a top plan View of an assembled manhole of elliptical transverse contour composed of a plurality of sections formed in accordance with the present invention.
  • FIG. 2 is a fragmentary vertical section thereof taken on the line 2-2 of FIG. l.
  • FIG. 3 is a fragmentary section taken on the line 3-3 of FIG. 2.
  • FIGS. 4, 5 and 6 are vertical sectional views of the preformed top, one intermediate, and base manhole sections respectively, such as shown in FIG. 2 but in individual separated condition.
  • FIGS. 7, 8 and 9 are top plan views of the sections of FIGS. 4, 5 and 6 respectively.
  • FIG. 10 is a fragmentary vertical sectional view of an assembly similar to that of FIG. 2 but of modified construction.
  • the reference numeral 10 indicates a pre-formed manhole top section of elliptical contour which is preferably formed of pre-cast concrete but may be composed of molded clay tile or other known structural composition conventionally employed in the production of pre-cast or pre-formed manhole sections which are adapted to be assembled by articulation in an excavation.
  • This manhole section is formed with an inwardly offset tapered edge portion 11 adapted to be received within a complementary annular beveled seat formed in the edge of a similarly shaped component such as is provided at 12 at its lower defining edge.
  • a similarly shaped component such as is provided at 12 at its lower defining edge.
  • Each of 3,212,519 Patented Oct. 19, 1965 the pre-formed components of the manhole are similarly provided with an inwardly olset tapered projection 11 at their upper edge and a tapered seat 12 formed within their lower edge portion.
  • the intermediate section 13 likewise is provided with an inwardly oifset tapered upper edge projection 11 and the edge tits within the tapered seat at the lower edge of section 10 or of any interposed intermediate section 13, it being understood that any number of intermediate sections 13 may be employed depending on the depth of the manhole.
  • the base section 14 likewise has a tapered upper edge projection 11 adapted to seat in the tapered groove in the lower edge of the intermediate section 13, or if no intermediate sections 13 are employed, base section 14 can be directly joined to the top section 10, all of the sections 10, 13 and 14 being of the same elliptical shape and dimension so that the sections shown in FIGS. 4, 5 and 6 can be joined together in a unit as shown in FIG. 2 suitably by the interposition of suitable cementitious material such as Portland cement, or a mastic comprising asphaltic materials, so as to provide a good joint between a tapered projection 11 and a complementary seat 12.
  • suitable cementitious material such as Portland cement, or a mastic comprising asphaltic materials
  • section 10 has been designated as the top section, if desired, it may comprise an intermediate unit and have a section 13 disposed above it.
  • Each of the sections 10, 13 and 14 suitably carry an internally disposed sectional ladder generally designated as 15 having upper hooked Vends 16 which seat within upper edgewise opening slots 17 in the wall of a unit 10, 13 or 14, with the lower end 18 of the ladder unit 15 extending normally to the ladder and below the edge of the units 10 and 13 to which it is secured, so that the portion 18 of one section may be received in the upper edge of the slot 17 of another section and abut against and adjacent top end 16 of the ladder component in a joined manhole section so as to form a continuous ladder therein, as described and claimed in my Patent 2,965,195.
  • the ladder section 15 in the base section 14 does not necessarily terminate in a bottom component 18, but rather terminates vertically within the bottom or base closure section 19 which may be suitably formed of Portland cement or a concrete mixture composed of cement and gravel aggregate.
  • This pre-formed bottom manhole section 14 is further provided with a pair of integrally formed laterally extending stub conduits 20 and 21 extending in opposite directions and having their axes aligned with the minor axis or short diameter of the elliptical section 14, these stubs 20 and 21 providing conduits for connection to a main sewer line.
  • the stub conduit 20 is suitably formed with a tapered seat in its edge as at 22 similar to the tapered seats 12, and stub conduit 21 is formed with an inwardly offset outwardly exs tending tapered edge portion 23 similar to the portions 11 to permit pre-formed sewer pipe lengths to be connected in the manner described with reference to sections 10, 13 and 14.
  • the sections 10, 13 and 14 are further provided with sections of inwardly disposed longitudinally extending conduits 24, which may be formed of molded clay tile or metal, suitably interlocked in place adjacent the other one of the vertices of the elliptical manhole sections and opposite to the ladder sections 15.
  • These conduit sections 24 are suitably embedded and lixed in place by means of reinforced concrete as at 25.
  • the conduit 24 extends from end to end as shown in FIG. 5.
  • the conduit 24 connects with the laterally and outwardly extending conduit section 26, the conduit 26 opening if desired not only into the vertical conduit section 24 but also into the interior of the section 10, as shown at 27.
  • the conduit 24 in the base section 14 suitably terminates in an integral L or bend 28 opening into the interior of section 14 and in the area where it is intersected by the stub conduits 20, 21.
  • sections 10, 13 and 14 may be continually and quickly joined together in a secure and positively aligned manner and the manhole built to desired length by employing as many intermediate sections 13 as is necessary.
  • auxiliary equipment may be disposed within pre-formed units such as ladder components 15 or internal conduits 24 and these likewise aligned in continuous manner.
  • FIGS. l to 9 shows the conduit sections to have disposed within them both a ladder section 15 and a parallel conduit 24, in the modified form shown in FIG. 10 only the ladder 15 is disposed within the sections.
  • the bottom section 14 may be provided with an aperture 29 in the wall thereof opposite the ladder 15 for intertting of suitable conduit as required.
  • one or more intermediate sections 13' may be joined together and vertically aligned with the base 14 in the manner described with respect to the form of FIGS. 1 to 9, it being understood that in the form of FIG. 10 the manhole sections are similarly pre-formed and of elliptical transverse section.
  • a manhole composed of a plurality of preformed edgewise internested vertically disposed and aligned sections of elliptical transverse contour, one of said sections forming a base closed at its lower end and including an opposed integral pair of laterally extending stub conduits, each of said sections carrying an aligned vertically extending conduit component disposed therein and secured adjacent one of the vertices of its elliptical section.
  • FRANK L. ABBOTT Primary Examiner.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewage (AREA)

Description

Oct. 19, 1965 c. F. PAscHEN 3,212,519
ONS WITH STUB INTERNESTED ELLIPTIGAL MANHOLE SECTI GONDUITS AND AN AUXILIARY CONDUIT 2 Sheets-Sheet 1 Filed June 22. 1962 hf. V
INVETTOR, CLAYTON F. AscHr-:N
Oct. 19, 1965 c. F. PAscHEN 3,212,519
PTICAL MANHOLE SECTIONS WITH STUB CONDUITS AND AN UXILIARY CONDUIT INTERNESTED ELLI 2 SheebS-Sheeb 2 Filed June 22, 1962 n N c IWW,
'9 I'NAVENTOR CLAYTON F. PAscHEN United States Patent C) 3,212,519 INTERNESTED ELLIPTICAL MANHOLE SECTIONS WITH STUB CONDUITS AND AN AUXILIARY CONDUIT Clayton F. Paschen, 2739 Elston Ave., Chicago 47, Ill. Filed June 22, 1962, Ser. No. 204,497 2 Claims. (Cl. 137-363) This invention relates to improvements in manhole construction for sewers, water conduits and the like of the class wherein a plurality of component sections are preformed and adapted to be assembled in previously formed excavations.
It is a particular object of the present invention to provide sections of the `class aforesaid which can be quickly assembled in a secure manner in the manhole excavation in a manner whereby interiorly contained components, such as auxiliary parallel conduit in accordance with the present invention, or ladder components as in my Patent No. 2,965,195, may be quickly and positively aligned into continuous units.
It is a further object of the present invention to provide pre-formed manhole sections adapted for vertical alignment which are of cross section adapted to give enhanced strength with maximum maneuverability and economy of space, this I accomplish by forming said sections of elliptical cross-sectional tubular contour.
By providing the `aforesaid pre-formed sections of elliptical contour and with the upper edge of oneasection adapted to nest within a complementary seat in the lower edge of an adjacent section, it will be apparent that one section cannot be circumferentially displaced with respect to another. Thus alignment of the sections and their aforesaid internally disposed elements is assured and makes their use extremely feasible and useful.
Also, by providing the aforesaid pre-formed sections with an elliptical contour the aforesaid auxiliary internally disposed components may be disposed in the most secure areas, namely adjacent one or both of the vertices of the ellipse.
Other objects of the present invention, its details of construction, arrangement of parts and the economies thereof will be apparent from a consideration of the following specification and accompanying drawings, wherein:
FIG. 1 is a top plan View of an assembled manhole of elliptical transverse contour composed of a plurality of sections formed in accordance with the present invention.
FIG. 2 is a fragmentary vertical section thereof taken on the line 2-2 of FIG. l.
FIG. 3 is a fragmentary section taken on the line 3-3 of FIG. 2.
FIGS. 4, 5 and 6 are vertical sectional views of the preformed top, one intermediate, and base manhole sections respectively, such as shown in FIG. 2 but in individual separated condition.
FIGS. 7, 8 and 9 are top plan views of the sections of FIGS. 4, 5 and 6 respectively.
FIG. 10 is a fragmentary vertical sectional view of an assembly similar to that of FIG. 2 but of modified construction.
Referring to the drawings, the reference numeral 10 indicates a pre-formed manhole top section of elliptical contour which is preferably formed of pre-cast concrete but may be composed of molded clay tile or other known structural composition conventionally employed in the production of pre-cast or pre-formed manhole sections which are adapted to be assembled by articulation in an excavation. This manhole section is formed with an inwardly offset tapered edge portion 11 adapted to be received within a complementary annular beveled seat formed in the edge of a similarly shaped component such as is provided at 12 at its lower defining edge. Each of 3,212,519 Patented Oct. 19, 1965 the pre-formed components of the manhole are similarly provided with an inwardly olset tapered projection 11 at their upper edge and a tapered seat 12 formed within their lower edge portion.
Thus, the intermediate section 13 likewise is provided with an inwardly oifset tapered upper edge projection 11 and the edge tits within the tapered seat at the lower edge of section 10 or of any interposed intermediate section 13, it being understood that any number of intermediate sections 13 may be employed depending on the depth of the manhole.
The base section 14 likewise has a tapered upper edge projection 11 adapted to seat in the tapered groove in the lower edge of the intermediate section 13, or if no intermediate sections 13 are employed, base section 14 can be directly joined to the top section 10, all of the sections 10, 13 and 14 being of the same elliptical shape and dimension so that the sections shown in FIGS. 4, 5 and 6 can be joined together in a unit as shown in FIG. 2 suitably by the interposition of suitable cementitious material such as Portland cement, or a mastic comprising asphaltic materials, so as to provide a good joint between a tapered projection 11 and a complementary seat 12.
Although section 10 has been designated as the top section, if desired, it may comprise an intermediate unit and have a section 13 disposed above it.
Each of the sections 10, 13 and 14 suitably carry an internally disposed sectional ladder generally designated as 15 having upper hooked Vends 16 which seat within upper edgewise opening slots 17 in the wall of a unit 10, 13 or 14, with the lower end 18 of the ladder unit 15 extending normally to the ladder and below the edge of the units 10 and 13 to which it is secured, so that the portion 18 of one section may be received in the upper edge of the slot 17 of another section and abut against and adjacent top end 16 of the ladder component in a joined manhole section so as to form a continuous ladder therein, as described and claimed in my Patent 2,965,195. In accordance with the present invention, however, I dispose these ladder sections 15 adjacent one of the vertices of the ellipse.
The ladder section 15 in the base section 14 does not necessarily terminate in a bottom component 18, but rather terminates vertically within the bottom or base closure section 19 which may be suitably formed of Portland cement or a concrete mixture composed of cement and gravel aggregate. This pre-formed bottom manhole section 14 is further provided with a pair of integrally formed laterally extending stub conduits 20 and 21 extending in opposite directions and having their axes aligned with the minor axis or short diameter of the elliptical section 14, these stubs 20 and 21 providing conduits for connection to a main sewer line. The stub conduit 20 is suitably formed with a tapered seat in its edge as at 22 similar to the tapered seats 12, and stub conduit 21 is formed with an inwardly offset outwardly exs tending tapered edge portion 23 similar to the portions 11 to permit pre-formed sewer pipe lengths to be connected in the manner described with reference to sections 10, 13 and 14.
In accordance with one form of the present invention, the sections 10, 13 and 14 are further provided with sections of inwardly disposed longitudinally extending conduits 24, which may be formed of molded clay tile or metal, suitably interlocked in place adjacent the other one of the vertices of the elliptical manhole sections and opposite to the ladder sections 15. These conduit sections 24 are suitably embedded and lixed in place by means of reinforced concrete as at 25. In the intermediate section 13 the conduit 24 extends from end to end as shown in FIG. 5. In the upper section 10 the conduit 24 connects with the laterally and outwardly extending conduit section 26, the conduit 26 opening if desired not only into the vertical conduit section 24 but also into the interior of the section 10, as shown at 27. The conduit 24 in the base section 14 suitably terminates in an integral L or bend 28 opening into the interior of section 14 and in the area where it is intersected by the stub conduits 20, 21.
It will thus be seen that sections 10, 13 and 14 may be continually and quickly joined together in a secure and positively aligned manner and the manhole built to desired length by employing as many intermediate sections 13 as is necessary. At the same time auxiliary equipment may be disposed within pre-formed units such as ladder components 15 or internal conduits 24 and these likewise aligned in continuous manner.
Although FIGS. l to 9 shows the conduit sections to have disposed within them both a ladder section 15 and a parallel conduit 24, in the modified form shown in FIG. 10 only the ladder 15 is disposed within the sections. Here the bottom section 14 may be provided with an aperture 29 in the wall thereof opposite the ladder 15 for intertting of suitable conduit as required. In this case, one or more intermediate sections 13' may be joined together and vertically aligned with the base 14 in the manner described with respect to the form of FIGS. 1 to 9, it being understood that in the form of FIG. 10 the manhole sections are similarly pre-formed and of elliptical transverse section.
Although I have shown and described the preferred embodiments of my invention it will be understood by those laterally extending stub conduits, the axes of said conduits coinciding with the minor transverse axis of said elliptical base section, and a vertically extending conduit disposed within said section and secured adjacent one of the vertices thereof, the lower end of said conduit opening within said base section.
2. A manhole composed of a plurality of preformed edgewise internested vertically disposed and aligned sections of elliptical transverse contour, one of said sections forming a base closed at its lower end and including an opposed integral pair of laterally extending stub conduits, each of said sections carrying an aligned vertically extending conduit component disposed therein and secured adjacent one of the vertices of its elliptical section.
References Cited by the Examiner UNITED STATES PATENTS 761,749 6/04 Baker 52-20 797,856 8/05 Keith et al. 52-218 2,440,762 5/ 48 Sitton 52-264 2,965,195 12/60 Paschen 182-206 FOREIGN PATENTS 22,187 9/09 Great Britain.
OTHER REFERENCES Air Conditioning, Heating and Ventilating, a publicaton pages -107, November 1955, TH 7201 H 5..
FRANK L. ABBOTT, Primary Examiner.
JACOB L. NACKENOFF, HENRY C. SUTHERLAND,
Examiners.

Claims (1)

  1. 2. MANHOLE COMPOSED OF PLURALITY OF PREFORMED EDGEWISE INTERNESTED VERTICALLY DISPOSED AND ALIGNED SECTIONS OF ELLIPTICAL TRANSVERSE CONTOUR, ONE OF SAID SECTIONS FORMING A BASE CLOSED AT ITS LOWER END AND INCLUDING AN OPPOSED INTEGRAL PAIR OF LATTERALLY EXTENDING STUB CONDUITS, EACH OF SAID SECTIONS CARRYING AN ALIGNED VERTICALLY EXTENDING CONDUIT COMPONENT DISPOSED THEREIN AND SECURED ADJACENT ONE OF THE VERTICES OF ITS ELLIPTICAL SECTION.
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787078A (en) * 1972-08-03 1974-01-22 R Williams Manhole base section for sewer lines
US3788080A (en) * 1971-06-16 1974-01-29 W Washabaugh Method of constructing concrete manholes having sealed joints with pipes connected thereto
US4023590A (en) * 1974-12-30 1977-05-17 The Oregon Drop Corporation Manhole construction
FR2341015A1 (en) * 1976-02-12 1977-09-09 Blisse Christel PROCESS FOR ERECTING WELLS, ESPECIALLY FOR SEWERS, AND WELLS CARRIED OUT BY IMPLEMENTING THIS PROCESS
US4089139A (en) * 1976-08-24 1978-05-16 Armco Steel Corporation Segmented cylindrical reinforced plastic manhole structure
US4243068A (en) * 1979-06-25 1981-01-06 Sugda Peter J Sewer chimney
US4566483A (en) * 1984-10-15 1986-01-28 A-Lok Products, Inc. Drop manhole precast encasement
US4923330A (en) * 1987-12-31 1990-05-08 Detommaso Stephen C Storm water injection well
US5482403A (en) * 1993-06-25 1996-01-09 Hail Mary Rubber Company, Inc. Sewer construction and pipe encasement therefor
US6106196A (en) * 1998-06-05 2000-08-22 Hantz, Jr.; Clyde Liquid drain system, components therefor and method for using same
US6135141A (en) * 1999-12-14 2000-10-24 Bombach; Ken Low profile high capacity inside drop for a manhole
FR2821372A1 (en) * 2001-02-23 2002-08-30 Beton Moule Ind B M I Prefabricated concrete component for tunnel used to carry various pipes and cables
US20050161088A1 (en) * 2003-08-13 2005-07-28 John Mokrzycki Manhole base
US20110088339A1 (en) * 2006-03-10 2011-04-21 Mccarthy Walton W Disaster shelter and shelter system
US9617722B2 (en) 2014-11-20 2017-04-11 Press-Seal Corporation Manhole base assembly with internal liner and method of manufacturing same
US20180195345A1 (en) * 2017-01-10 2018-07-12 Keystone Tower Systems, Inc. Wind turbine tower attachment
US10214893B2 (en) 2014-11-20 2019-02-26 Press-Seal Corporation Manhole base assembly with internal liner and method of manufacturing same
US20190112777A1 (en) * 2017-10-18 2019-04-18 Tetra Tech, Inc. Vertical manhole apparatus and method for providing access to leachate collection pipes in a landfill

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US761749A (en) * 1903-10-27 1904-06-07 Hugh C Baker Jr Manhole.
US797856A (en) * 1905-03-31 1905-08-22 Matthias Keith Jr Chimney.
GB190922187A (en) * 1909-09-29 1910-04-28 Charles Sharp Improvements in Manholes for Main-sewers and the like.
US2440762A (en) * 1945-01-01 1948-05-04 Philip N Sitton Concrete septic tank
US2965195A (en) * 1959-04-23 1960-12-20 Clayton F Paschen Portable ladder for a manhole or the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US761749A (en) * 1903-10-27 1904-06-07 Hugh C Baker Jr Manhole.
US797856A (en) * 1905-03-31 1905-08-22 Matthias Keith Jr Chimney.
GB190922187A (en) * 1909-09-29 1910-04-28 Charles Sharp Improvements in Manholes for Main-sewers and the like.
US2440762A (en) * 1945-01-01 1948-05-04 Philip N Sitton Concrete septic tank
US2965195A (en) * 1959-04-23 1960-12-20 Clayton F Paschen Portable ladder for a manhole or the like

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788080A (en) * 1971-06-16 1974-01-29 W Washabaugh Method of constructing concrete manholes having sealed joints with pipes connected thereto
US3787078A (en) * 1972-08-03 1974-01-22 R Williams Manhole base section for sewer lines
US4023590A (en) * 1974-12-30 1977-05-17 The Oregon Drop Corporation Manhole construction
FR2341015A1 (en) * 1976-02-12 1977-09-09 Blisse Christel PROCESS FOR ERECTING WELLS, ESPECIALLY FOR SEWERS, AND WELLS CARRIED OUT BY IMPLEMENTING THIS PROCESS
US4102088A (en) * 1976-02-12 1978-07-25 Gustav Keller Manhole-pit lining and method of making and installing same
US4089139A (en) * 1976-08-24 1978-05-16 Armco Steel Corporation Segmented cylindrical reinforced plastic manhole structure
US4243068A (en) * 1979-06-25 1981-01-06 Sugda Peter J Sewer chimney
US4566483A (en) * 1984-10-15 1986-01-28 A-Lok Products, Inc. Drop manhole precast encasement
US4923330A (en) * 1987-12-31 1990-05-08 Detommaso Stephen C Storm water injection well
US5482403A (en) * 1993-06-25 1996-01-09 Hail Mary Rubber Company, Inc. Sewer construction and pipe encasement therefor
US5525007A (en) * 1993-06-25 1996-06-11 Hail Mary Rubber Co., Inc. Sewer construction
US6106196A (en) * 1998-06-05 2000-08-22 Hantz, Jr.; Clyde Liquid drain system, components therefor and method for using same
US6135141A (en) * 1999-12-14 2000-10-24 Bombach; Ken Low profile high capacity inside drop for a manhole
FR2821372A1 (en) * 2001-02-23 2002-08-30 Beton Moule Ind B M I Prefabricated concrete component for tunnel used to carry various pipes and cables
US20050161088A1 (en) * 2003-08-13 2005-07-28 John Mokrzycki Manhole base
US6968854B2 (en) * 2003-08-13 2005-11-29 Munro Concrete Products Ltd. Manhole base
US20110088339A1 (en) * 2006-03-10 2011-04-21 Mccarthy Walton W Disaster shelter and shelter system
US10053850B2 (en) 2014-11-20 2018-08-21 Press-Seal Corporation Manhole base assembly with internal liner and method of manufacturing same
US9617722B2 (en) 2014-11-20 2017-04-11 Press-Seal Corporation Manhole base assembly with internal liner and method of manufacturing same
US10214893B2 (en) 2014-11-20 2019-02-26 Press-Seal Corporation Manhole base assembly with internal liner and method of manufacturing same
US10428512B2 (en) 2014-11-20 2019-10-01 Press-Seal Corporation Manhole base assembly with internal liner and method of manufacturing same
US20180195345A1 (en) * 2017-01-10 2018-07-12 Keystone Tower Systems, Inc. Wind turbine tower attachment
US10626672B2 (en) * 2017-01-10 2020-04-21 Keystone Tower Systems, Inc. Wind turbine tower attachment
US11686155B2 (en) 2017-01-10 2023-06-27 Keystone Tower Systems, Inc. Wind turbine tower attachment
US20190112777A1 (en) * 2017-10-18 2019-04-18 Tetra Tech, Inc. Vertical manhole apparatus and method for providing access to leachate collection pipes in a landfill
US10753062B2 (en) * 2017-10-18 2020-08-25 Tetra Tech, Inc. Vertical manhole apparatus and method for providing access to leachate collection pipes in a landfill

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