Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7112055 | Nitinol frame heating and setting mandrel An apparatus for heating and setting elements of a stent. The apparatus is a mandrel having a central core cylinder with an outer surface including a plurality of raised forms and gaps in-between the raised forms. The mandrel also includes a first and second outer c... | 09/26/2006 |
| 6817589 | Apparatus and method for removing joint rings from cured concrete products As a part of the manufacture of concrete products, such as concrete pipe, manholes and the like, the joint rings applied during the casting process much be removed. The invention relates to a joint ring removal system in which a vertically oriented concrete product,... | 11/16/2004 |
| 6789398 | Mold incorporating a heat source and apparatus and method for using such molds A heat source is formed within one piece of a multi-piece mold designed to shape a glass tube. The one piece of the mold can then be used as a source of intense heat to render the glass malleable and to also contribute to shaping the tube in conformance with the mol... | 09/14/2004 |
| 6736365 | Valve for use in producing cast concrete articles A three piece full port ball valve for use with a form for producing a cast concrete article is provided wherein the housing of the valve has been modified by creating openings through the valve housing to access the flow opening in the ball member for clearing conc... | 05/18/2004 |
| 6536239 | Apparatus and method for shaping glass tubes with molds A mold for shaping the end region and the opening at a selected end of a first, hollow, generally cylindrical, glass tube to enable a second tube, of smaller diameter than the first tube, to be inserted snuggly a first distance within the selected end of ... | 03/25/2003 |
| 6395213 | Apparatus and method for producing cast concrete articles A form for producing a cast concrete article can have a core at least partially surrounded by an outer jacket thus defining a cavity between an outer surface of the core and an inner surface of the outer jacket. A header can be provided generally sealed a... | 05/28/2002 |
| 5648108 | Production system for automatic casting of hollow bodies, in particular of concrete A production system for automatically casting hollow bodies, in particular of concrete, in a casting mold, which comprises an inner mold (2), an outer mold (1), a bottom ring (3), and a top ring (4). Separate top rings (4) are used for the production, whi... | 07/15/1997 |
| 5286440 | Method for the production of a symmerical oval concrete pipe A method and apparatus for the production of a symmetrical oval concrete pipe including an oval male joint member and an oval female joint member formed on opposite ends of an oval pipe body including an outer jacket and an inner core disposed in spaced r... | 02/15/1994 |
| 5251867 | Header pallet A header pallet for the manufacture of the spigot of a concrete pipe to receive a sealing gasket during assembly of a pipe line including an outer header ring having an end leg portion and a side leg portion to cooperatively form a substantially L-shaped ... | 10/12/1993 |
| 5238384 | Apparatus for producing a composite pipe in a rotating drum The components forming the layers of a composite pipe are successively introduced into a rotary drum (1). Initially, a plastic reinforcing layer (8), including a fibre reinforcement, is introduced into the drum, the ends of the drum (1) being bounded by r... | 08/24/1993 |
| 5229024 | Apparatus for making concrete pipe The invention relates to seals on equipment used to make concrete pipe. Such equipment includes two generally vertical cylindrical surfaces, a core and a mold, with upper and lower end forming rings. The lower end forming ring, a pallet, has inner and out... | 07/20/1993 |
| 5215673 | Apparatus for the production of a symmetrical oval concrete pipe An apparatus for the production of a symmetrical oval concrete pipe including an oval male joint member and an oval female joint member formed on opposite ends of an oval pipe body having a form including an outer jacket and an inner core disposed in spac... | 06/01/1993 |
| 5082614 | Method for producing a composite pipe in a rotating drum The components forming the layers of a composite pipe are successively introduced into a rotary drum (1). Initially, a plastic reinforcing lyaer (8), including a fiber reinforcement, is introduced into the drum, the ends of the drum (1) being bounded by r... | 01/21/1992 |
| 4708632 | Injection moulding mould A mould which is used for the production by injection moulding of fittings which have an inner annular groove includes a divisible outer mould, a mould core and a mould ring. The mould core has a plurality of segments which can be folded together. In orde... | 11/24/1987 |
| 4614324 | Mold for producing concrete pipe A mold is provided for use in the production of concrete pipe sections. The mold has an inner mold part including an arch-shaped mold member; a pair of substantially L-shaped side mold members each flexibly connected to an adjacent end of the arch-shaped ... | 09/30/1986 |
| 4522669 | Combination mould portion and protective element for pipe A mould portion and/or protective element of the type consisting of a material subjected to deformation is disclosed. A method and a device for manufacturing such a mould portion and/or protective element are also disclosed. The mould portion and/or prote... | 06/11/1985 |
| 4449912 | Apparatus for the automatic ejection of concrete pipes An apparatus for manufacturing concrete pipes having a molding flask provided with a specially formed end ring on the bell end side. The apparatus further includes a device for detaching this end ring and another device disposed at the spigot end side and... | 05/22/1984 |
| 4418885 | Nozzle hood for moulding pipes A improved apparatus for molding pipes is dislosed. A hood of convex shape having an outer surface corresponding to the shape of the interior of the pipe and has an annular rim on the widest part thereof and a molding shank rigidly attached to the narrowe... | 12/06/1983 |
| 4305564 | Casting mould for the production of concrete or similar pipes in an upright position The invention relates to the technical problem of providing a simple, efficient and easily operable locking mechanism to releasably clamp the bottom ring to the lower edge of the outer mould in a casting mould for the production of concrete or similar pip... | 12/15/1981 |
| 4151246 | Manufacture of short pipes Pipes of short length are moulded in a vertical pipe-making machine by locating a series of rings in a circular mould to divide the length of the mould into several compartments, the compartments are filled with settable material, to form a pipe with the ... | 04/24/1979 |
| 4134568 | Plural molds with common actuating means A form assembly for making concrete product, as concrete pipes. The form assembly has a pair of upright outer forms comprising cylindrical jackets. The cylindrical jackets are secured to each other with connectors. First latch structures connected to the ... | 01/16/1979 |
| 4123034 | Box form for concrete culvert A box form used in a dry cast system for making a concrete box culvert. The form has a pair of wall sections secured together with a pair of corner units. The corner units can be removed from the wall sections and replaced with different sized corner unit... | 10/31/1978 |
| 4123033 | Apparatus for forming hollow cylindrical pipes of reinforced concrete Improved apparatus for forming hollow cylindrical pipes of reinforced concrete wherein the pipe is formed in a vertical position and the principle components for forming the pipe comprise a bottom pallet and saddle, an outer jacket, a core positioned conc... | 10/31/1978 |
| 4101622 | Method of casting beveled pipe A pipe mold for vertically cast concrete pipe includes a cylindrical outer mold case, a cylindrical core spaced inside the mold case, and a pipe-reinforcing cylinder between the core and the case. A system for casting concrete in the pipe mold includes a ... | 07/18/1978 |
| 4047693 | Supporting ring for use in the casting of concrete pipes A supporting ring for casting machines for concrete pipes for use in moulding the socket end of the pipe and as a base for the green pipe during the removal of the casting mould and the initial hardening of the concrete, said ring consisting of a hollow a... | 09/13/1977 |
| 3945787 | Cap rest assembly for packerhead/vibration system concrete pipe machine A cap rest assembly to support a closed bore cap slightly above the upper periphery of the pipe jacket in a packerhead/vibration system concrete pipe machine, which has a slump filler attachment enabling making of a green pipe including the upper end in a... | 03/23/1976 |
| 3942936 | Facing ring and pouring chute for vertically cast concrete pipe A pipe mold for vertically cast concrete pipe includes a cylindrical outer mold case, a cylindrical core spaced inside the mold case, and a pipe-reinforcing cylinder between the core and the case. A system for casting concrete in the pipe mold includes a ... | 03/09/1976 |
| 3941347 | Composite concrete and steel pallet for forming one end of concrete pipe A composite pallet for forming the lower end of a concrete pipe cast in a vertical position includes a concrete base having an annular portion shaped to form the end of the pipe. An outer annular steel ring is bonded to the base around the outer periphery... | 03/02/1976 |
