Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7270169 | Method and apparatus for pouring several moulds in a mould-string plant in one pouring operation In a method for pouring several moulds in a mould-string plant in the pouring operation, the moulds are produced by compression of sand or similar mould material in a pressing chamber comprising pattern plates 3, 4 for providing impressions in the surfaces of... | 09/18/2007 |
| 7073557 | Method of drying a sand mold using a vacuum A method of drying a sand mold mixture containing moisture includes restraining the sand mold mixture and exposing the sand mold mixture to a vacuum. The vacuum flashes off the moisture within the sand mold mixture thereby drying the sand mold mixture to create a so... | 07/11/2006 |
| 6923240 | Process and apparatus for producing casting cores A method for producing sand cores for foundry, comprising the operations of: defining a molding cavity; blowing in a mixture of sand and hydrated binder into said molding cavity so as to produce a mass of sand, which reproduces in a complementary way the shape of sa... | 08/02/2005 |
| 6668904 | Method and apparatus for producing casting moulds or mould parts In a mould forming machine comprising a moulding chamber, a movable squeeze plate and a pattern, the filling of selected parts of the pattern with compressible mould material is improved by applying vacuum to said selected parts. By applying the vacuum se... | 12/30/2003 |
| 6634410 | Mold apparatus and method A mold apparatus and method for creating designs on the interior of molds includes a resilient form with an exterior and an interior, with a design formed on the exterior. A rigid support member is removably attached to the interior of the resilient form.... | 10/21/2003 |
| 5957189 | Apparatus and method for sequentially feeding quantities of sand into a mold space and subjecting the space to evacuation and then pressure increase after each feed A first quantity of all the molding sand necessary to produce a mold is fed in the mold space, the first quantity being one of at least two parts divided from the total molding sand. The mold space is evacuated and then air is introduced into the mold spa... | 09/28/1999 |
| 5881794 | Apparatus and method for producing shell-like molds An apparatus to produce a shell-like mold by vacuum sucking molding sand into a shell-like cavity defined by a cope and a drag is disclosed. The apparatus includes a drag and a cope mounted on the drag so that they define a shell-like cavity between them.... | 03/16/1999 |
| 5333669 | Coreshooters for self-setting process with vacuum system A coreshooter includes a table on which a corebox for molding articles is positioned, and a blowing cartridge supplying sand into the corebox. The corebox is housed in a bell which forms about the corebox a chamber. The bell is fitted with a connection to... | 08/02/1994 |
| 5318093 | Method and apparatus for investment casting In an improved method and apparatus for investment casting, a pattern (31) is mounted on a sprue base (19) of an spider gasket (12) that is secured to one end of a standard investment flask (11). A solid end cap (13) is secured to the other end of the fla... | 06/07/1994 |
| 5219014 | Device and method for fabricating foundry molds from granular material The invention concerns a device and method for continuous fabricating of foundry molds from granular material. The device consists of a frame (10) with lights (11) supporting through swivels (31) caissons (30, 40) with large partitions (42) provided with ... | 06/15/1993 |
| 5161603 | Method for production of single-use foundry molds and apparatus for realization thereof A molding chamber (7) accommodating pattern plates (24, 25) is supplied by a steam of air with sand mixture delivered in a direction parallel to the pattern plates (24, 25). After a time delay relative to the start of the sand delivery operation, and sand... | 11/10/1992 |
| 5137091 | Process of producing molded body from green molding sand Green sand is packed as molding sand into a compression mold and the green sand is precompacted in the mold using a hydraulic press and thereafter is finally compacted after the precompaction wherein prior to precompaction recesses formed in the molding t... | 08/11/1992 |
| 5062466 | Countergravity casting apparatus and method In vacuum countergravity casting a melt into a mold sealingly engaged to a vacuum container by an elastomeric sealing gasket, the sealing gasket is isolated from the heat of an underlying source of the melt and from contact therewith during casting by sub... | 11/05/1991 |
| 4984620 | Apparatus for making molds for making metal castings The apparatus comprises two containers, which are adapted to be connected to a vacuum pump. The upper container contains a rotationally symmetrical guiding body. A distributing space is defined by the shell of the upper container and the closed peripheral... | 01/15/1991 |
| 4958674 | Full mold casting process and device A full mold casting process in which a complete, positive model made of a thermally decomposable material is placed in a molding box and filled with sand; the sand is hardened by tamping it in. Casting metal is poured on the thermally decomposable model a... | 09/25/1990 |
| 4957153 | Countergravity casting apparatus and method In an apparatus for vacuum countergravity casting of molten metal, a gas permeable, self-supporting mold is supported in an inverted casting position in an open bottom container with a particulate bed compacted about the mold. The mold may comprise a mold... | 09/18/1990 |
| 4947923 | Method and apparatus for evaporative pattern casting The method and apparatus are based on the use of a casting process in which expendable patterns are made of a low density material, then evaporated by molten metal as the metal advances into the cavity created by the evaporation of the pattern material. T... | 08/14/1990 |
| 4915159 | Method and apparatus for compacting foundry mold making material about a foundry mold pattern To permit close matching of compaction pressure being applied to foundry mold making material, such as foundry sand, to the shape of a mold pattern (2) in a pattern box (3, 4), individual fluid pressure is applied to a plurality of press plungers (7) loca... | 04/10/1990 |
| 4791974 | Method and an apparatus for producing shaped bodies from particulate material In a method of operating an apparatus with a mold chamber (8) being supplied with fluidized mold sand (2) from a supply chamber (1) under air pressure applied through suitable air channels (3), and in which the pressure in the supply chamber (1) is increa... | 12/20/1988 |
| 4739820 | Apparatus for simultaneous making of matching mould parts with a horizontal parting face The apparatus includes a shared pattern carrier (1), to which an upper and a lower half pattern (2, 3) are secured. Moulding chambers (4, 5) are provided above and below the pattern carrier (1), the moulding chambers having movable squeeze plates (6, 7) f... | 04/26/1988 |
| 4739821 | Apparatus for making mould parts with a horizontal parting face A apparatus for making mould parts with a horizontal parting face consists of a container (1) in which is kept moulding material (2), preferably moulding sand, a moulding chamber (3) which may be subjected to vacuum and which may be defined at the bottom ... | 04/26/1988 |
| 4724888 | Method and apparatus for the production of flaskless foundry molds A method and apparatus for producing flaskless foundry molds made up of copes and drags of wet casting foundry sand, which is blasted into a cavity to form the mold with the use of vacuum. The sand is pressed mechanically while aspirating air therefrom. T... | 02/16/1988 |
| 4653568 | Foundry process and apparatus, including mixing investment composition under vacuum A foundry process and associated apparatus for providing mixing of water, an additive, and a casting (investment) for the automated powder, which once mixed, are to be delivered to molds to form casting molds such as in the fabrication of microwave compon... | 03/31/1987 |
| 4620584 | Green sand mold filling system A green sand mold filling system is formed of an air chamber box having a cover plate which supports a pattern. Air passageway holes, which communicate with the air chamber, extend through the plate and pattern at preselected locations, such as difficult ... | 11/04/1986 |
| 4586555 | Mold making plant A mold making machine the production of flaskless molds is made up of a sand supply container, with a blowing and squeezing grid at its lower, that is able to be moved vertically, a hollow pattern plate mount, valve and duct means connected with the said ... | 05/06/1986 |
| 4567932 | Vacuum moulding flask In a vacuum moulding flask, air is removed by suction from the flask, which has been filled with moulding sand, in order to consolidate the mould. To ensure satisfactory distribution of the vacuum, suction pipes are disposed inside the flask and the sucti... | 02/04/1986 |
| 4566521 | Moulding apparatus for making gas hardened sand mould A hopper for providing moulding sand having an opened top and a bottom member having through holes for discharging the sand is positioned spaced apart at a suitable distance horizontally from a cover member connected to a suitable source for generating ga... | 01/28/1986 |
| 4538665 | Molding box apparatus A molding box apparatus having a horizontal tubular body and a pair of pattern plates having pattern surfaces complementary to the mold chambers to be formed fitting in the tubular body, at least one of the pattern plates being slidable in the tubular bod... | 09/03/1985 |
| 4539168 | Device and process for making thin-walled wax models for lost-wax casting In order to remove a thin-walled wax model adhering to the walls of a first core piece and a second core piece, after solidifying, from a multi-part device for making thin-walled wax models, without damaging the wax model, after the external pressure is r... | 09/03/1985 |
| 4531565 | Gas hardening type molding machine Disclosed is a gas hardening type molding machine wherein a vertical type molding box is disposed under a molding sand hopper having an upper part opened and a bottom part provided with a sand discharge port, and a mold cavity in the vertical split type m... | 07/30/1985 |
| 4390056 | Method and apparatus for producing one or more hollow sand cores suitable for casting moulds An apparatus and method for producing one or more hollow sand cores suitable for casting moulds using a bipartite core box defining a mould cavity into which sand and a catalyst or a curing agent are introduced. The method includes the steps of establishi... | 06/28/1983 |
| 4286937 | Production of sand moulds This provides a way of producing a sand mould which does not require heavy echanical presses or violent vibration to ensure sand properly fills tight patterns in a mould. Sand is put into a buffer zone 40 via a feed device 2,3. Below the buffer zone 40 is ... | 09/01/1981 |
| 4231415 | Apparatus for the production of foundry sand molds A dosed amount of molding sand is placed in a vessel arranged at a given distance from a pattern device from which a mold is to be formed, and a pressurized force is applied against the molding sand in the vessel from the side thereof remote from the patt... | 11/04/1980 |
| 4182395 | Method and device for the production of casting molds out of sand containing a binder Casting molds from binder-containing molding sand manufactured by improved vacuum injection, achieved by employing an injection grate with injection slots of a minimum width of at least 50 mm, a filterless connection between the mold container, the vacuum... | 01/08/1980 |
| 4154287 | Apparatus for manufacturing fusible patterns The present invention relates to equipment used for investment casting and may find application in various fields of engineering to enable automation of the process of manufacturing easily fusible patterns. The proposed apparatus comprises a pressure casting d... | 05/15/1979 |
| 4129165 | Preparation of foundry moulds and cores To compact a sand-binder mixture in a mould or core box and subsequently apply a hardening gas to the mixture, I apply to the open top of the box a fluid-pervious diaphragm backed by an impervious diaphragm, apply suction to the bottom of the box to draw ... | 12/12/1978 |
| 4126176 | Foundry molding machine for box molds The molding machine has injection apparatus which operates with compressed air for filling a molding box with molding sand and pre-compacting the sand. Vents for escape of spent air from the molding box are provided in a filling frame, which rests on the ... | 11/21/1978 |
| 4103733 | Manufacture of foundry cores and moulds A method and apparatus for preparing foundry moulds or cores from a cold-setting sand based foundry mixture. The foundry mixture is introduced to a mould or core box and during setting of the mixture in the box suction is applied to the box to accelerate ... | 08/01/1978 |
| 4103729 | Apparatus and process for catalytic gassing in the manufacture of foundry cores and molds, and the like A shaped mass of particulate material such as foundry sand, admixed with a polymerizable binder, is instantly completely hardened by contact of gas catalyst therewith. The preferred method and apparatus in accordance with the present invention involves fi... | 08/01/1978 |
| 4089362 | Manufacture of foundry cores and moulds A method and apparatus for filling a foundry mould or core box with a sand-based foundry moulding mixture. The mixture is blown into the box under pressure while suction is applied to the box.... | 05/16/1978 |
