Elevation Or Level Adjustment Patents (Class 404/26)
  • Patent number: 4927290
    Abstract: A manhole cover support resistant to infiltration of surface water is shown. Such support is adapted for emplacing over and raising the effective grade of an existing manhole cover receiving structure and accommodating a new layer of paving around its perimeter and a manhole cover therewithin. The support is characterized by: a body that has at least one adjustable joint for rendering the cover support adjustable in its outer perimeter dimension, the body comprising a base having a ledge for a manhole cover, the ledge having a lateral cover keeper arising therefrom; and deformable seal elements comprising synthetic and/or natural resin-containing material, the seal elements being adapted to interact with deformable plug means for the adjustable joints to block substantial infiltration of surface water, and one of the seal elements being disposed on the ledge and at least another of the seal elements being disposed substantially around the outer perimeter of the body.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: May 22, 1990
    Inventor: Harold M. Bowman
  • Patent number: 4925337
    Abstract: The manhole covering comprises a casing, a base frame and an adjusting device. A two-part base frame has a plurality of bores, which are aligned with pockets located in the base part of the casing. In each pocket is inserted a screw nut, into which is screwed and secured the lower end of a threaded bolt extended through the assigned bore of the base frame. The base frame is adjusted in height and slope by a pair of nuts. The adjustment of a particular slope is made possible due to the shape of the bores, which widen to either end and by convexly curved washers cooperating with the bores at their ends. The screw connection of the base frame constitutes a positive connection, which prevents breaking out of the base frame even in the case of a high, eccentric force application to the manhole covering.
    Type: Grant
    Filed: September 28, 1988
    Date of Patent: May 15, 1990
    Assignee: Von Roll, AG
    Inventors: Hansruedi Spiess, Francois Galvanetto
  • Patent number: 4917531
    Abstract: A temporary device is used for street repair work to provide a ramp between the ground roadway surface and the upper end of such structures as manhole supports, etc. The device of this invention is removably secured to the roadway and the manhole cover by a plurality of clips having a first portion embedded within the ramp and a second portion which operably engages the manhole support and manhole cover.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: April 17, 1990
    Inventor: Robert E. McGinnis
  • Patent number: 4906128
    Abstract: An adjustable manhole top which can be readily raised up or down in minutes to correct problems when the ground around it heaves. A cylindrical sleeve with a plurality of spaced elongated shoulders extending longitudinally along an internal surface thereof, is adjustably seated about upwardly extending projections from a support rim. A lock, removably supported on the support rim, is provided with a height adjustment mechanism to support a corresponding shoulder on the sleeve, to secure the sleeve at a desired height.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: March 6, 1990
    Inventor: Roger Trudel
  • Patent number: 4872780
    Abstract: An improved manhole cover support adapted to raise the effective grade of an existing manhole cover receiving structure such as a manhole cover frame is shown. Integral with and substantially coextensive with the top of its thin-walled cover keeper portion is a stiffening wale that defines a cavity. The cavity can be, for example, rectangular or arcuate, and it can contain a cohesive or other filler solid. The cover support need not be adjustable in perimeter, and wale need not be continuous but interrupted adjacent ends can be joined. The cover support can have water seals of compressible polymer that are interposed between its cover seat and the cover that it is to accept, and between its outer perimeter and the upper surface, e.g., paving, into which it is set and/or the shoulder of the existing manhole cover receiving structure where it sits. At least part of the sealing elements can be adherent to the cover support.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: October 10, 1989
    Inventor: Harold M. Bowman
  • Patent number: 4867601
    Abstract: An improved manhole cover support adjustable in perimeter and adapted to raise the effective grade of an existing manhole cover receiving structure such as a manhole frame is shown. Integral and substantially coextensive with the upper part of its thin-walled lateral cover keeper portion is a reinforcing wale. The cover support can be in the form of a split ring or a plurality of joined segments. Advantageously, it can have bridged joints and a flexible, compressible retention member on at least a portion of its expanding outer wall member.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: September 19, 1989
    Inventor: Harold M. Bowman
  • Patent number: 4867600
    Abstract: This cover support provides a seat and lateral keeper for a manhole cover. A principal feature is a plurality of straight lateral segments that are joined near their ends and have corner spreaders acting in an essentially horizontal direction that is biased with respect to the longitudinal axes of the lateral segments whose ends they spread or draw in.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: September 19, 1989
    Inventor: Harold M. Bowman
  • Patent number: 4844402
    Abstract: The mortar cap receives cementitious materials therewithin, such as cement, mortar, and the like, to define a footing for a manhole frame, and has a base frame with a pair of concentric, spaced-apart walls, and an ancillary frame, also with a pair of concentric, spaced-apart walls. The base frame is set within the ancillary frame, and the latter is slidably and vertically displaceable relative to the base frame. The ancillary frame has a plurality of knobs projecting from walls thereof which confront given walls of the base frame, and the given walls of the base frame has a plurality of racks of ribs which confront the knobs. With vertical displacement of the ancillary frame, or a sector of the ancillary frame, the latter is arrestingly held in the displacement due to an interference of the knobs and ribs, and an engagement of the knobs with a pair of the ribs.
    Type: Grant
    Filed: July 1, 1988
    Date of Patent: July 4, 1989
    Inventor: Ronald Werner
  • Patent number: 4834574
    Abstract: A utility cover extension and its process of installation are shown. The extension is adapted to rest on the cover support flange of and make a snug fit in a utility housing for a manhole cover. The extension provides an access opening above the housing. It has a rim and seat that furnish lateral retention and a new, substantially higher elevation for the cover. The extension has at least one spreadable joint for expanding its periphery against the constraint of the housing, and there is a gap in the seat at the joint when the extension is expanded. A discrete closure comprising compressible polymer is applied at the gap for preventing the substantial infiltration of surface water therethrough.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: May 30, 1989
    Inventor: Harold M. Bowman
  • Patent number: 4808025
    Abstract: A temporary device is used for street repair work to provide a ramp between the ground roadway surface and the upper end of such structures as manhole supports, storm sewer inlet grates, etc. The device of this invention is secured to the roadway by a plurality of stakes driven downwardly through the device and embedded in the roadway.
    Type: Grant
    Filed: August 21, 1987
    Date of Patent: February 28, 1989
    Inventor: Robert E. McGinnis
  • Patent number: 4759656
    Abstract: A stackable elastomer adjustment ring is provided for the construction of the adjustment courses or manhole chimney portion of a sewer system. The adjustment ring is circular and includes concentric grooves in the upper and lower surfaces. Sealing rings are provided corresponding with the concentric grooves and are positioned between the adjustment rings in the grooves when the rings are stacked one on another. The adjustment rings are stacked one on another with respective sealing rings between them to provide a manhole construction which is resistant to infiltration, chemicals and freeze-thaw cycle damage.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: July 26, 1988
    Assignee: Stephen K. Wilson
    Inventor: Stephen K. Wilson
  • Patent number: 4737220
    Abstract: A hollow, flexible, bendable, cylindrical-shaped, hat-like sleeve is water-tightly joined with the upper end of the riser section of a manhole structure. The free end of the sleeve is trimmed so that its upper edge fits beneath the shoulder of the frame supporting the manhole cover to prevent subsurface water from entering into the manhole interior through the regions between the manhole cover supporting frame and the top of the riser section, which is usually fitted with adjustment rings to bring the manhole cover frame up to grade. The sleeve is easily cut to any height to accommodate either a greater or lesser number of height adjustment rings. The sleeve flange is cast into the riser section. The sleeve may be folded into itself to significantly lower its profile to expedite handling, transportation and assembly. A plastic clamping band may be placed into the interior of the sleeve to water-tightly join the upper end of the sleeve to the manhole cover support frame.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: April 12, 1988
    Assignee: A-Lok Products, Inc.
    Inventors: Jack Ditcher, Eric Ditcher, James A. Westhoff
  • Patent number: 4706718
    Abstract: A containment manhole is disclosed which includes a hollow body having a closed bottom and an open top. A concentric opening is provided in the bottom to receive an underground tank fill therethrough and a circular, resilient seal is provided to seal the junction between the tank fill and the manhole bottom. Optionally, a drain valve may be provided in the manhole bottom to lead any spillage directly back to the tank fill. The manhole terminates upwardly in the machined ring and includes a gasketed junction with the ring. The ring includes an upper shoulder upon which the cover peripheral lip can rest and a lower shoulder of size to enable the cover peripheral edges to rest. An O-ring seal is provided intermediate the cover and the top ring to provide a first sealed junction and a circular gasket is affixed on the lower ring edge to provide a second seal when the cover is in position.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: November 17, 1987
    Assignee: Universal Valve Co., Inc.
    Inventor: Joseph V. Milo
  • Patent number: 4690584
    Abstract: An adjustable leveling apparatus for manhole covers, grates and the like within ground and similar structures, employing an annular extension ring received within an annular base ring having an internal ring seat, the extension ring being provided with inwardly disposed rigid bar members deformable over the ring seat to securely lock the extension ring within the base ring.
    Type: Grant
    Filed: April 17, 1985
    Date of Patent: September 1, 1987
    Assignee: E. L. LeBaron Foundry Co.
    Inventor: Francis LeBaron
  • Patent number: 4673310
    Abstract: An adjustable leveling structure for manhole covers, grates and the like within ground and similar structures which comprises an annular-walled ring for supporting a cover, grate and the like near its upper edge and mechanically compressible resilient layer means shaped to conform to the wall of the annular ring and disposed in the space between the outer wall of the annular ring and the ground or similar structure when the annular ring is vertically displaced.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: June 16, 1987
    Assignee: E.L. LeBaron Foundry Co.
    Inventor: Francis LeBaron
  • Patent number: 4666333
    Abstract: The present invention provides a casting positioning apparatus, which is used to position a casting in relation to an upper end of manhole. The apparatus includes a sleeve unit which has open upper and lower ends, and which is moveable in lateral dimensions between a first position and a second position. In the first position, the lower end of the sleeve unit can freely engage with the upper end of the manhole. In the second position, the upper end of the sleeve unit can support the casting in a position mounted on it, while at the same time an engaging section of the lower end of the sleeve unit can frictionally engage against a side of the upper end of the manhole. Such frictional engagement is with sufficient force such that the sleeve and the mounted casting can be supported by such engagement, while allowing the upper end of the sleeve to be moved with respect to the upper end of the manhole. By such means, the casting can be positioned with respect to the upper end of the manhole.
    Type: Grant
    Filed: August 22, 1985
    Date of Patent: May 19, 1987
    Inventor: Ronald B. Armstrong
  • Patent number: 4650365
    Abstract: A watertight manhole insert is provided for preventing rainwater from entering a sanitary sewer system through manhole covers. The insert includes a shallow, dish-shaped body and a mounting flange designed to rest upon the supporting flange of a manhole frame. A recess is formed in the bottom of the body portion and includes a valve for releasing pressure which builds up beneath said insert. The valve is shielded such that it will not be struck by a manhole cover sliding across said insert. Additionally, the valve can be used as a handle to remove the insert from a manhole.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: March 17, 1987
    Assignee: FRW Industries, Inc.
    Inventor: Franklin D. Runnels
  • Patent number: 4621941
    Abstract: A hollow, flexible, bendable, cylindrical-shaped, hat-like sleeve is water-tightly joined with the upper end of the riser section of a manhole structure. The free end of the sleeve is trimmed so that its upper edge fits beneath the shoulder of the frame supporting the manhole cover to prevent subsurface water from entering into the manhole interior through the regions between the manhole cover supporting frame and the top of the riser section, which is usually fitted with adjustment rings to bring the manhole cover frame up to grade. The sleeve is easily cut to any height to accommodate either a greater or lesser number of height adjustment rings. The sleeve flange is cast into the riser section. The sleeve may be folded into itself to significantly lower its profile to expedite handling, transportation and assembly. A plastic clamping band may be placed into the interior of the sleeve to water-tightly join the upper end of the sleeve to the manhole cover support frame.
    Type: Grant
    Filed: September 25, 1985
    Date of Patent: November 11, 1986
    Assignee: A-Lok Products, Inc.
    Inventors: Jack Ditcher, Eric Ditcher, James A. Westhoff
  • Patent number: 4621939
    Abstract: The drainage channel comprises a channel body (1), cast frame (2) and cast grid (3). The support surface of the side walls (11) of the channel body (1) are of stepped construction, with a raised external supporting rib (13). The frame (2) is rectangular, with a lowered support rail (28) as support for the side ribs (30) of the grid (3). On the outside the frame (2) has detachably fastened brake lugs (23), which in the installed state prevent displacement of the frame (2). Locking bar holders (44) of roughly H-shaped cross-section are disposed in the side walls (11) some distance below the support surface. These locking bar holders form a closure between the interior of the channel body and the exterior. On the inside a side wall (79) forms an obtuse angle with the wall (75), so that the locking bar (45) can easily be turned into the inner recess (78).
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: November 11, 1986
    Assignee: Polydrain, Inc.
    Inventors: Roland Thomann, Heinz Witschi, Heinz-Dieter Brink, Markus Amann
  • Patent number: 4614065
    Abstract: An adjustable cleanout apparatus having an inner cylindrically shaped body with an outer portion thereof having threads thereon, such inner body having a predetermined inner diameter. Holes extend through the bottom of the inner body for permitting the inner body to be attached to an upstanding plumbing cleanout pipe. A lead and oakum joint is formed between the outer top portion of the cleanout pipe and the inner portion of the inner body. A cylindrical member having an outer diameter larger than the diameter of the outer portion of the inner body is utilized to be disposed over the inner body so that a concrete floor poured around the cylindrical member will not come into contact with a substantial portion of the threads of the inner body whereby such cylindrical member can be selectively removed from around the inner body after the concrete is cured.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: September 30, 1986
    Inventor: David J. Papp
  • Patent number: 4593714
    Abstract: A manhole assembly is attached on a fill pipe for an underground storage tank for gasoline, diesel fuel or other types of toxic chemicals. The manhole assembly comprises a bucket-like body attached on an upper end of the fill pipe and a removable cover mounted on an upper end of the body to selectively expose the fill pipe. At least one annular dam is formed on an upper surface of the body and is adapted to nest within an annular groove formed on an underside of the cover. The dam functions as a barrier to prevent the ingress of water into the body during rainstorms and the like. A combined sealing and cushioning assembly attaches a bottom wall of the body to the fill pipe and a drain connection is provided for selectively communicating an internal chamber of the body with the fill pipe.
    Type: Grant
    Filed: June 19, 1984
    Date of Patent: June 10, 1986
    Inventor: Michael J. Madden
  • Patent number: 4591290
    Abstract: A valve box adapter comprising an adapter frame for insertion into a valve box which adapter frame includes an elongated narrow tapered skirt contiguous with a horizontally extending portion at its top adapted in one embodiment for the exterior bottom of said extending portion to rest upon the seat of the valve box and further having an upwardly extending portion contiguous with the horizontally extending portion forming an adapter rim having angled sides and a downwardly beveled top, said adapter adapted to fit within an existing valve box and to receive a smaller cover than was in the original valve box such cover resting upon the inner upper portion of the horizontally extending member forming a seat for the new cover.
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: May 27, 1986
    Assignee: Everett J. Prescott, Inc.
    Inventor: Everett J. Prescott
  • Patent number: 4582450
    Abstract: An adjustment ring for raising a cover which fits over an opening of a casting fixed in a road surface is provided and comprises a plurality of ring sections mounted upon the casting. Each section has spaced apart first and second ends with the first end of each section being adapted to overlap the second end of each adjacent section such that the overlapping ends of the consecutively adjacent sections form the ring into a shape complimentary to that of the casting. The overlapping sections are secured to one another by screws. The perimeter of the ring can be adjusted by altering the extent of overlap between adjacent sections. Each section includes a support surface for supporting the cover or grate.
    Type: Grant
    Filed: October 10, 1984
    Date of Patent: April 15, 1986
    Inventor: Ronald Neil
  • Patent number: 4544302
    Abstract: A grate riser for use with catch basins and the like comprising vertically open rectangular frames with at least two opposing frame sections carrying inwardly projecting horizontal grate support flanges and cooperating grates with opposite end portions of parallel spaced apart elongated horizontal grate elements adapted to rest on the flanges. The grate riser has a vertically open generally rectangular frame coextensive with a catch basin frame with opposing vertical side and end wall sections of a height substantially equal to the depth of new road pavement. The frame rests atop a catch basin frame with its top edge substantially level with the top surface of new pavement. At least two horizontally spaced upper riser elements depend from each of two opposing grate riser frame sections to support a pair of elevated horizontal grate support flanges. The grate support flanges have lower riser elements depending therefrom in the form of flanges which rest on the grate support flanges of the catch basin.
    Type: Grant
    Filed: May 7, 1984
    Date of Patent: October 1, 1985
    Assignee: The Jack Farrelly Company
    Inventor: Robert E. Farrelly
  • Patent number: 4536103
    Abstract: An adjustable cast iron or ductile iron manhole frame and method of construction utilizing a formed concrete base or a base of brick and cement mortar that supports both the frame and the pavement. The height and angle of the frame are determined by the method of construction which sets the height and angle of the formed concrete base. The frame is further adapted to receive and hold the manhole cover, and the frame includes an arched section to hold it securely to the concrete base or to filler material when in a raised position.
    Type: Grant
    Filed: August 16, 1983
    Date of Patent: August 20, 1985
    Inventor: Everett J. Prescott
  • Patent number: 4505814
    Abstract: A roof drain receptacle for mounting on the roof deck of a roofing structure and including an upwardly opening drain body with an externally disposed apparatus for adjustably extending and supporting the drain body so that its open upper end is in the proper drain water receiving position relative to the top surface of the roofing structure.
    Type: Grant
    Filed: April 18, 1983
    Date of Patent: March 19, 1985
    Assignee: Tyler Pipe
    Inventor: Marshall W. Marshall
  • Patent number: 4469115
    Abstract: An extension is secured to a valve box in a roadway to be repaved by coating the valve box shoulder and the bottom of the extension with a thin layer of epoxy adhesive, placing a heated neoprene gasket on the shoulder, and setting the extension in place on the gasket. Heating makes the gasket pliable, and heat from the gasket assists in curing the adhesive. A curing-type liquid sealant is introduced into the space around the periphery of the extension to prevent the entry of water, salt and other corrodents.
    Type: Grant
    Filed: February 11, 1983
    Date of Patent: September 4, 1984
    Assignee: Bonded Products, Inc.
    Inventor: Gary B. Rockafellow
  • Patent number: 4466219
    Abstract: Manhole cover support rings and clips are used to increase the height of an existing manhole cover support frame for raising the height of a manhole cover positioned thereon so as to match or be level with a resurfaced roadway. The support rings are split so as to be adjustable with respect to the diameter are position by clips on the existing manhole cover support frame and are secured thereto by clips to form the elevated support for the manhole cover.
    Type: Grant
    Filed: May 18, 1983
    Date of Patent: August 21, 1984
    Inventor: James J. Campolito
  • Patent number: 4442645
    Abstract: A compound construction panel for double floors used in room air conditioning, comprising an external, tub-shaped sheath formed of a high tensile-strength and high Young's modulus material, a filler in the sheath formed of a low tensile strength and low Young's modulus material, and a rigid annular body disposed in an aperture in the bottom of the sheath and extending to the upper portion of the sheath. The annular body is anchored in the filler and is provided with a radially inwardly projecting annular flange at its lower portion which serves as a support for an air discharge nozzle, a dirt-catcher or the like.
    Type: Grant
    Filed: November 5, 1980
    Date of Patent: April 17, 1984
    Assignee: MERO-Werke Dr.-Ing. Max Mengeringhausen GmbH & Co.
    Inventors: Wolfgang Hiller, Hans Kramer
  • Patent number: 4408421
    Abstract: An improved manhole structure is disclosed which comprises a cover having a rim inclined inwardly at 45.degree., on which a plurality of protrusions are provided; a ring for elevating the cover, having an upright inner wall and outer wall and an upper face and lower face, both inclined inwardly at 45.degree., on the said upper face a plurality of holes are formed for engagement with the protrusions formed on the cover, and on the said lower face a plurality of protrusions are formed; and a base having an upper surface inclined inwardly at 45.degree., and a flat lower face, on the said upper surface a plurality of holes are formed for engagement with the protrusions formed on the lower face of the said ring.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: October 11, 1983
    Inventor: Yang-Kuang Pai
  • Patent number: 4350177
    Abstract: A support for a utility box such as a valve box or the like which includes an annular member having a central opening with an upstanding flange on the upper surface of the annular member adjacent the central opening. The annular member is buried in the ground in underlying supporting engagement with a box so as to prevent sinking of the box into the ground under heavy traffic load, said box provides access to the buried utility the upper end of the box opening into the street.
    Type: Grant
    Filed: May 12, 1980
    Date of Patent: September 21, 1982
    Inventors: John C. Firchau, Morris L. Donaldson
  • Patent number: 4337005
    Abstract: This disclosure is concerned with apparatus for enabling extension or other leveling adjustment of manhole cover supporting structures and the like comprising extension spacer rings resiliently compressed in self-storing fashion adjacent a support sleeve portion of the supporting structure, and adapted to be forced downward from storage to expand into position below the sleeve to extend or adjust the level of the same.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: June 29, 1982
    Inventor: Francis LeBaron
  • Patent number: 4302126
    Abstract: A manhole cover support ring adapted to be placed within an existing manhole frame for raising the height of a manhole cover. A circular ring is formed by a generally vertically extending flange having an annular bar welded on its lower end which provides an inwardly extending manhole cover support ledge. The flange and bar are split at a common point on their peripheries. An expansion mechanism is pivotally mounted on and extends between the spaced ends of the bar formed by the split in the ring. The expansion mechanism includes a pair of eyebolts pivotally mounted on the spaced ends of the annular bar. The eyebolts each have a threaded shaft which is engaged in a respective threaded end of a tubular member. One of the threaded shafts has a right-hand thread and the other shaft is formed with a left-hand thread, whereby rotation of the tubular member in one direction will contract the ring sufficiently to place it within the manhole frame opening.
    Type: Grant
    Filed: December 27, 1979
    Date of Patent: November 24, 1981
    Inventor: Raymond L. Fier
  • Patent number: 4281944
    Abstract: An adjustable support for varying the height of a manhole cover after a street surface has been resurfaced is presented including vertically disposed posts in a downward position on each end of each adjustable section. These posts provide the location for bolts connecting adjacent ends of two adjustable sections so that the entire structure permits the units to be expanded and contracted to fit a plurality of different diameters of manholes. Also an upwardly extending radially outwardly positioned projection on the outer surface of the base member of the adjustable section ensures a more stable engagement of the base member of the adjustable section with the manhole housing on which it is adapted to rest.
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: August 4, 1981
    Inventor: Harold M. Bowman
  • Patent number: 4273467
    Abstract: An adjustable manhole cover support. The support comprises an outer ring having a circular internal opening. Threaded members are disposed about the interior of the circular opening. An insert is dimensioned to fit within the outer ring to a depth controlled by the abutment of the insert against the threaded members. Studs engage and extend through the threaded members to abut the under surface of the insert to provide control of the depth of the insert into the outer ring and the angulation of the outer ring. The support is simple to make, easy to adjust and trouble-free in operation.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: June 16, 1981
    Assignee: Cremo Supply Ltd.
    Inventor: Allan D. Cronk
  • Patent number: 4255909
    Abstract: An adjustable manhole is disclosed having telescoping tubular members which can be fixed in a number of relative axial positions. One member carries a series of transversely oriented ribs and grooves in the interface between the members, and the other member carries a smooth wall in the interface. Locking means are engageable in selected grooves to fix the relative positions of the members.
    Type: Grant
    Filed: November 3, 1978
    Date of Patent: March 17, 1981
    Inventor: Gert Soderstrom
  • Patent number: 4236358
    Abstract: An adjustable manhole cover support structure including a peripheral frame adapted for placement in the opening of a manhole housing, a peripheral manhole adjusting ring portion disposed on the frame, and a lateral support ring portion disposed on the adjusting ring. The adjusting ring portion has a peripheral inner seat for receiving the manhole cover. The lateral support ring portion is formed as a unit with the adjusting ring portion and projects generally rigidly upwardly therefrom to restrain the adjusted and elevated manhole cover against lateral movement relative to the frame.
    Type: Grant
    Filed: August 16, 1978
    Date of Patent: December 2, 1980
    Assignee: National Utility Products Company
    Inventor: Harold M. Bowman
  • Patent number: 4225266
    Abstract: A manhole cover elevating and support ring adapted to be placed within an existing manhole frame for raising the height of a manhole cover, and a method of installing the same. A circular ring is roll formed of metal bar stock with a predetermined size gap. An improved adjustable link is force-fitted within the ring gap to expand the ring outwardly into abutting clamping engagement with an annular wall of a manhole frame to securely mount the ring therein. The improved method includes the steps of radially compressing the ring and restraining the ring in this compressed position. The ring then is placed within a manhole frame opening. The restraining means is removed and the ring expands outwardly toward its normal uncompressed position, thereby clamping itself tightly against the manhole frame. The improved adjustable link and a spring biased keeper also may be installed within the ring gap to insure its clamping engagement with the manhole frame.
    Type: Grant
    Filed: November 1, 1978
    Date of Patent: September 30, 1980
    Inventor: Raymond L. Fier
  • Patent number: 4197031
    Abstract: A vertically adjustable manhole cover assembly having a fixed annular support member, and a vertically adjustable annular member supported therein. The support member is provided with sets of graduated supports symmetrically mounted on its inner surface, and the adjustable member has sets of complementary graduated teeth on its outer surface which interact with the supports to rigidly support the adjustable member at a plurality of vertical levels. Grooves are also provided on the inside surface of the support member for accepting, and interlocking with, the teeth to prevent relative rotation of the annular members. The graduated teeth of the sets may include subsets of graduated steps.
    Type: Grant
    Filed: September 12, 1978
    Date of Patent: April 8, 1980
    Inventor: Manfred Hild
  • Patent number: 4187647
    Abstract: Plastic extender rings for manholes are produced by molding as a unitary member or extrusion or in molded segments and are seated by the use of caulking or other adhesive material. The manhole cover, which is elevated by the plastic ring from the old pavement level to a new pavement level, is rendered more silent to traffic and is seated more evenly. Plastics are employed which will not melt at the application temperature of asphalt but will soften somewhat to conform better to the contour of the manhole cover and/or underlying manhole top ring. Plastic fillers may be employed in the product to regulate plasticity and increase resistance to deterioration from the elements and from ultraviolet.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: February 12, 1980
    Assignees: Margaret T. Hall, James B. Turner, Jr.
    Inventor: John R. Hall
  • Patent number: 4188151
    Abstract: Plastic extender rings for manholes are produced and are seated on the top ring of a manhole by the use of caulking or other adhesive material. The manhole cover, which is elevated by the plastic ring or rings from the old pavement level to a new pavement level, renders the manhole cover less noisy to traffic and seated more evenly. Recessed or notched portions of the rings receive the asphalt to arrest rotational and upward movement of the rings. Composite adapter rings are provided to adapt an off size manhole top rings, to a standard size manhole cover. Plastics are employed which will not melt at the application temperature of asphalt but will soften somewhat to conform better to the contour of the manhole cover and/or underlying manhole top ring.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: February 12, 1980
    Assignees: Margaret T. Hall, James B. Turner, Jr.
    Inventor: John R. Hall
  • Patent number: 4174183
    Abstract: A support frame for a man-hole cover or similar article of highway furniture has a vertical wall portion with an outwardly extending flange at one end. Support means for the cover on the inside of the flange is so arranged that the frame can be mounted either with the flange at the upper end of the wall or with the flange at the lower end of the wall, the top of the cover being level with the top of the frame in both cases. When the frame is mounted with the flange at the upper end, the frame is "self-levelling".
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: November 13, 1979
    Assignee: Self-Level Covers Aktiengesellschaft
    Inventor: Derek Ferns
  • Patent number: 4158515
    Abstract: This invention pertains to a method and apparatus whereby, when a thoroughfare is to be resurfaced, the covers for the openings that extend downwardly beneath such thoroughfares may be raised to a level corresponding to the raised level of the resurfaced thoroughfare. Such raising is accomplished without the need for digging up the framework that supported the cover.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: June 19, 1979
    Inventor: William R. Helms
  • Patent number: 4149816
    Abstract: The invention provides a metal cover frame for an open shaft, adapted to be installed flush with a road surface and connected in a vertically adjustable manner to a concrete frame which is adapted to rest on the upper end of the shaft, the metal frame comprising through holes provided in an inwardly projecting lip of the metal frame, and collects corresponding to the through holes in the metal frame being provided in the concrete frame, the collets being adapted to receive tightening screws penetrating the through holes.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: April 17, 1979
    Inventor: Johannes L. Piso
  • Patent number: 4143988
    Abstract: A manhole extension or riser for increasing the height of manhole cover frames when a roadway is resurfaced. It includes roadbed piercing anchors attached to the periphery of a simple ring increasing the height of the frame. The anchors, made of flat steel plates cut into trapezoids, act to lock the riser in place when the new road surface is laid down. A second ring is used to increase the height of the cover support lift.
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: March 13, 1979
    Assignee: Aggregates Equipment, Inc.
    Inventor: Ralph M. Arment
  • Patent number: 4121390
    Abstract: A manhole or a catch basin is built up by stacking a number of pre-cast concrete units. The joints between the units are provided, prior to stacking, with a bead of a non-hardening, semi-liquid, mastic waterproof layer to enable subsequent removal of the units without damaging same. The pre-cast concrete unit of this invention is typical by having cutouts in the side wall and corresponding protrusions extending from one face thereof. Hand or tool receiving depressions are provided in one surface of the unit to facilitate the handling of the unit when increasing or reducing the overall height of a manhole. The shape of the unit not only facilitates the production of same but also assists in convenient handling. Due to generally smooth faces, the steaming-off of the waterproof layer prior to the storage of a removed unit is also facilitated.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: October 24, 1978
    Assignee: Moduloc Concrete Products (London) Ltd.
    Inventors: Alfred George Hall, Brian E. Brown
  • Patent number: 4097171
    Abstract: A manhole cover support ring adapted to be placed within an existing manhole frame for raising the height of a manhole cover. A circular ring is formed by a generally vertically extending flange having an annular bar welded on its lower end which provides an inwardly extending manhole cover support ledge. The flange and bar are split at a common point on their peripheries. A toggle mechanism is pivotally mounted on at least one of the spaced ends of the bar and is operatively engageable with the other bar end. Actuation of the toggle mechanism to an over center position expands the ring flange into abutting relationship with a complementary circular portion of the manhole frame which forms the manhole opening to secure the support ring on the manhole frame. The toggle mechanism includes a pivotally mounted bolt which is threadably engaged with a portion of one of the toggle levers for adjusting the outward expansion limit of the ring.
    Type: Grant
    Filed: September 16, 1977
    Date of Patent: June 27, 1978
    Inventor: Raymond L. Fier
  • Patent number: 4075796
    Abstract: This manhole consists primarily of a cast and internally threaded main body, which receives a cast and internally threaded sleeve, which may be raised to different pavement levels by means of a removable spanner wrench. It includes a pair of diametrically opposed and slidable locking plates, which have pin means on the underside for being received within openings on the upper interior of the sleeve, and the upper portion of the plates projects outwards of the sleeve, so as to lock the sleeve and cover within the main body, thus preventing rotation thereof, the plates when the sleeve is lowered or elevated, serving as a means of rendering the sleeve and cover stationary at various pavement levels.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: February 28, 1978
    Inventor: Benjamin D. Cuozzo
  • Patent number: 4050839
    Abstract: A process for raising manholes and manhole covers to a new grade level of a street when constructing new streets or when paving old streets, comprising the steps of placing a sealing means around the interior of the cast manhole between the lower edge thereof and the upper edge of a sewer catch basin, and pouring wet concrete around the exterior of manhole, the sealing means, and the upper edge of the sewer catch basin to form a continuous joint between the manhole at the raised grade level and the upper edge of the sewer catch basin, and removing the sealing means from between the edges of the manhole and sewer catch basin.
    Type: Grant
    Filed: August 27, 1976
    Date of Patent: September 27, 1977
    Inventor: Ronald D. Vollmar
  • Patent number: 4010051
    Abstract: A method of bedding a load-carrying member on a supporting foundation in which one or more open-ended axially compressible moulds are placed on the foundation and a bonding agent which includes a thermosetting resin capable of bonding to both the underside of the member and to the foundation is placed in the mould or moulds. The member is then placed on the mould or moulds and, by its own weight, or by a superimposed load, compresses the mould or moulds axially until the member is itself pressed into contact with the bonding agent, which is contained laterally by the mould or moulds, the bonding agent then being allowed or caused to harden. The method is particularly useful for bedding manhole covers on a manhole wall.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: March 1, 1977
    Assignee: Corrosion Technical Services Limited
    Inventors: Michael H. Ingrey, Donald J. Watson