Famous Patents
The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7322252 | Apparatus for taking measurements in access manholes An apparatus for measuring the location and annular orientation of pipe inverts and other features in manholes. An elongate, telescoping rod is supported centrally in the manhole opening by a pivot assembly that permits the rod to both rotate in the horizontal plane... | 01/29/2008 |
| 7264761 | Method of making a molded plastic elbow An improved molded plastic elbow and a related mold assembly and manufacturing method are provided, wherein the elbow defines an internal flow path having a smoothly radiused inside turn. The elbow is formed by injecting plastic material into a tubular mold cavity f... | 09/04/2007 |
| 7201534 | Apparatus and method to secure manhole accessways A manhole access way security apparatus and method for using the security apparatus are disclosed. The security apparatus includes an insert, at least one locking pin and a locking mechanism each interconnected to allow users to easily and quickly install a security... | 04/10/2007 |
| 7160497 | Process and apparatus for molding polymer fittings A method and apparatus for producing molded fluoropolymer sweep elbows with straight ends while minimizing distortion of the fitting. The invention includes a mold for creating the sweep fittings of the invention. The mold includes a mold cavity block and internal c... | 01/09/2007 |
| 7153125 | Molded plastic elbow An improved molded plastic elbow and a related mold assembly and manufacturing method are provided, wherein the elbow defines an internal flow path having a smoothly radiused inside turn. The elbow is formed by injecting plastic material into a tubular mold cavity f... | 12/26/2006 |
| 7059806 | Hole former for an invert A hole former for a manhole with an invert, which aligns the hole with the invert such that pipes are properly aligned and will not leak or cause damming when connected to the manhole. The hole former has an alignment member with a central aperture as a part of the ... | 06/13/2006 |
| 6740281 | Three-dimensional articles of indeterminate axial length An integral three-dimensional article having interstitials therethrough, the three-dimensional article comprises an unconstrained number of axially successive stages. An apparatus and process for molding such a three-dimensional article are also disclosed. The appar... | 05/25/2004 |
| 6610240 | Method of injection molding jointed linkage support A method of injection molding a part having two undercut regions using a two-part mold. A combined pin-in-a-sleeve extends into the cavity in each of the mold parts in order to form a bore in a part to be molded in that cavity. Each pin provides a portion... | 08/26/2003 |
| 6399006 | Process and apparatus for molding polymer sweep fittings A method and apparatus for producing molded fluoropolymer sweep elbows with straight threadable ends that minimizes distortion of the fitting. The apparatus comprises a mold core or insert that is comprised of multiple curved segments which are retracted ... | 06/04/2002 |
| 6379142 | Apparatus for manufacture of a tip for liquid drop dispensing container A liquid container includes a drop dispensing tip with a hollow stem which defines a liquid passageway and an interior partition wall in the passageway. The partition wall separates the liquid passageway into an upstream chamber and a downstream chamber. ... | 04/30/2002 |
| 6339882 | Flush valve A flush valve is adapted for placement through a hole in the bottom of a toilet tank. The valve seat has an axis with a lower section adapted to extend through the hole and an upper section defining an opening generally perpendicular to the axis. A first ... | 01/22/2002 |
| 5660758 | Mold apparatus for manufacturing a plastic article with interrupted interior threads for securing a heat sink to a heat generating member A article with interior interrupted threads and a mold apparatus for manufacturing the same is provided. The molded article includes an aperture positioned completely therethrough as defined by an inner wall. The inner aperture wall carries a series of th... | 08/26/1997 |
| 5656227 | Method of making a one-piece trigger sprayer housing A method of molding a trigger sprayer one-piece housing includes molding the housing with a shroud having sides which extend rearward to an integral ergonomic saddle with a surface configured to rest upon the user's hand during trigger sprayer actuation. ... | 08/12/1997 |
| 5540411 | Invert former for manhole base section A plastic liner for protecting concrete manhole interior surfaces from corrosion wherein the liner includes provisions for creating a strong mechanical lock between the liner and the interior surfaces. A side of the liner which includes the provisions has... | 07/30/1996 |
| 5474119 | Method of and mold for casting a combined engine block and cylinder head for a twin piston engine The mold comprises an outer mold part (10) which defines a mold cavity (11). Walls of the outer mold part form the outer surface of the combined engine block and cylinder head. There also are first and second inner mold parts (12, 13) which extend into th... | 12/12/1995 |
| 5470522 | Method of molding Y-adapter with a sideport radius A method of molding the main body of a Y-adapter that has a straight passageway extending from one extremity to the other and an arcuate passageway that is generated along the arc of a circle. Core pins for the straight and arcuate passageways are placed ... | 11/28/1995 |
| 5413307 | Precast manhole invert forming A mold for casting an inverted base section of a manhole includes a core for forming an inner surface of the base section, and a jacket surrounding the core for forming an outer surface of the base section. A domed plate atop the core but below an upper e... | 05/09/1995 |
| 5328294 | Manhole casting setting fixture A manhole casting setting fixture includes a pair of spaced parallel frame rails connected by a plurality of transverse struts. Four loop handles are secured at opposite ends of the frame rails to facilitate manual manipulation and transportation of the f... | 07/12/1994 |
| 5264177 | Method of making paint roller bearings An open and shut molding method of making a paint roller bearing with offsetting core support surface for use in paint roller applicators that permit the user to change a paint roller quickly and efficiently on a paint roller applicator by bringing togeth... | 11/23/1993 |
| 5223202 | Method for making corrosion and abrasion resistant knife gate and other valve types A method and apparatus for manufacturing a bidirectional, corrosion and abrasion resistant gate valve body. In one embodiment, the gate valve body, including flange seals and a liner, are produced in a single molding operation. A mold with appropriate cor... | 06/29/1993 |
| 5217671 | Method of making a tubular body A tubular body for reducing the rate at which a fluid flows to a predetermined rate with a resistance in a flow control device of a pressure measuring system, includes a tubular member having an axis along which the fluid can flow therethrough, and a land... | 06/08/1993 |
| 5167898 | Injection mold assembly and method for manufacturing a plastic tub with holes A mold assembly for use in an injection molding process to mold a one-piece article such as a washing machine tub. The mold assembly includes first and second relatively moveable mold plates, a mold core projecting from the first mold plate, and a plurali... | 12/01/1992 |
| 5139721 | Method and apparatus for forming a precast curb system A method and apparatus for forming a curb section of a predetermined length sub-divided into modules by transverse grooves which give the appearance of shorter blocks and provide for fracturing the curb section at those locations. Each module of the curb ... | 08/18/1992 |
| 5114657 | Integrally molded cross-flow fan and method of making the same by radially withdrawing gap-forming molds An integrally molded cross-flow fan has a circular array of angularly spaced, radial vanes. The cross-flow fan is molded with a molding assembly having a plurality of gap-forming molds jointly defining mold cavities for forming the vanes. A molten resin m... | 05/19/1992 |
| 5108282 | Biaxial concrete masonry casting apparatus A CM block machine for casting masonry blocks includes a mold cavity formed between a mold box and a mold core containing one or more plungers selectively extending laterally into the cavity along a second axis which is normal to the axis of casting so as... | 04/28/1992 |
| 5108281 | Biaxial concrete masonry casting apparatus The biaxial CM casting apparatus utilizes one or more main mold cores having an automatically extensible and retractable plunger or like structure extending laterally into the mold cavity from the one or more main mold cores along an axis substantially or... | 04/28/1992 |
| 5104606 | Method of molding a one-piece measuring and dispensing apparatus A method of making a measuring and dispensing apparatus molded in one piece for placement in a neck of a flexible wall container is provided. The apparatus has side walls, a base wall, an open top and an upstanding central member which contains a central ... | 04/14/1992 |
| 5102607 | Method for molding products with undercut regions A method provides a mold for producing a product where the product includes material over an undercut opening in the product. The mold comprises first and second mold sections which open and close relative to one another and the first mold section in itse... | 04/07/1992 |
| 5041256 | Method for forming corrugated plastic pipe connector A liquid tight connector for affixing, in a liquid tight manner, to a conduit having a ridge located adjacent to its end, wherein the conduit extends into a bore (5) and abuts against a sealing surface (6) and is held in liquid tight engagement therewith.... | 08/20/1991 |
| 4998706 | Vane core assembly for use in making centrifugal elastomer coated impellers An elastomeric-covered shrouded impeller having a pair of disk-like shrouds enclosing vanes and vane passages which has an improved throat opening having sweeping internal sidewalls is disclosed. A three-piece mold core is utilized to form the vane passag... | 03/12/1991 |
| 4986942 | Method for forming ported cylinder sleeve liner foam pattern A single-piece foam pattern for use in the lost foam casting of a ported cylinder sleeve is formed in a molding tool having a pair of displaceable elements and a removable center core. Ports, of preselected size, shape and location, are defined by movable... | 01/22/1991 |
| 4941643 | Apparatus for forming inverts and manhole assemblies and the like utilizing adjustable invert forming members joined with an intermediate flexible portion Apparatus for forming inverts in a manhole base comprising at least one adjustably positionable channel-forming member for forming an invert which communicates between associated sidewall openings of a manhole base. Flexible members join the ends of the i... | 07/17/1990 |
| 4938909 | Flash-free molding of I.C. engine passages A method of making a molded plastic component of an internal combustion engine. The method is for making a fuel rail and includes constructing particular core pins of the mold with threaded connections that form seals between them when they are disposed i... | 07/03/1990 |
| 4919189 | Method of forming as-cast holes by using cores, and apparatus for practicing the method A method for forming an as-cast hole by using a core involves forming an undercut and casting by using a core die which is slidable at an angle with respect to mold closing and opening directions. At the same time, an as-cast hole with an axial direction ... | 04/24/1990 |
| 4909717 | Biaxial concrete masonry casting apparatus The biaxial CM casting apparatus utilizes one or more main mold cores having an automatically extensible and retractable plunger or like structure extending laterally into the mold cavity from the one or more main mold cores along an axis substantially or... | 03/20/1990 |
| 4884622 | Mould for moulding of a foundry pattern and process for putting it into practice A three part mould for an engine cylinder block which has several aligned cylinders with parallel axes, several bearings for mounting a crankshaft having an axis perpendicular to the cylinder axes, voids formed around the cylinders, and recesses between t... | 12/05/1989 |
| 4872637 | Die member for forming a lost foam pattern A die member for forming a foam pattern for casting a cylinder block in a lost foam casting process, the pattern having a cylindrical bore with an axis, and a helical transfer passage including a first portion permitting die member separation in a directi... | 10/10/1989 |
| 4867411 | Manhole invert casting system A plurality of invert forming mold members are bolted together and have their ends received in internal frames provided at adjacent pipe openings in a manhole. The mold members are formed of relatively thick and heavy polyurethane and are of U-shaped cros... | 09/19/1989 |
| 4867412 | Apparatus for the production by powder metallurgy of a section of a header pipe of a heat exchanger Apparatus for the production by powder metallurgy of a heat exchanger block in which two spaced concentric half shells are provided with holes in which profiled pipes are inserted. The profiled pipes are internally supported by pins when metal powder is i... | 09/19/1989 |
| 4854543 | Apparatus for forming an opening with a gasket in a masonry manhole An assembly is provided for installing a resilient gasket having a projecting, pipe-engaging portion and an anchoring portion fixed in the peripheral wall of a circular opening in a masonry manhole construction, the masonry manhole construction having an ... | 08/08/1989 |
