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| Number | Title | Issue Date |
| 7273026 | Roller follower body The present invention relates to a roller follower, comprising an outer surface, enclosing a first cavity, a second cavity, and a transition opening, wherein the first cavity includes a first inner surface configured to house a cylindrical insert the second cavity i... | 09/25/2007 |
| 7222837 | Valve body with integral seal retention groove A valve body having at least one internal hollow or space comprises two separately formed portions joined by at least one cylindrical web. Internal space may communicate with space outside the valve body via a fluid passage, and internal space may be filled with a s... | 05/29/2007 |
| 7011067 | Chrome plated engine valve A valve (10) for use in an internal combustion engine comprises a base metal. The base metal is covered with a thin, dense chromium coating. ... | 03/14/2006 |
| 6779267 | Method for increasing the wear-resistance of a work piece A method for increasing the wear-resistance of a work piece involves connecting the work piece to a non-formable core material having a greater hardness than that of the work piece material. In order to improve the connection while simultaneously reducing the costs,... | 08/24/2004 |
| 6009843 | Fiber reinforced, titanium composite engine valve Lightweight, strong, engine valves that incorporate a valve stem made from a refractory monofilament-reinforced, titanium-based metal matrix composite. Advantageously, the composite of the present invention is sufficiently strong so that valve stems incor... | 01/04/2000 |
| 5738060 | Poppet valve and method of making the poppet valve A poppet valve (10) includes an elongated valve stem (14) with first and second ends (22, 26). A valve head (12) is located at the first end (22) of the stem (14). A valve tip (24) is fixed to the second end (26) of the stem (14). The tip (24) is construc... | 04/14/1998 |
| 5425821 | Iron aluminum based engine intake valves and its manufacturing method The present invention resides in a method for making an internal combustion engine intake valve. An iron aluminum alloy, in the form of a coil or bar stock, is provided. The alloy comprises 76.05 to 90.15 weight percent iron, 9 to 13.3 weight percent alum... | 06/20/1995 |
| 5328527 | Iron aluminum based engine intake valves and method of making thereof The present invention resides in a method for making an internal combustion engine intake valve. An iron aluminum alloy, in the form of a coil or bar stock, is provided. The alloy comprises 76.05 to 90.15 weight percent iron, 9 to 13.3 weight percent alum... | 07/12/1994 |
| 5257453 | Process for making exhaust valves A method of making work-hardened poppet exhaust valves for internal combustion engines comprises the steps of: providing a solutioned work-hardenable austenitic stainless steel coil or bar stock in which chromium is present in the range of 13%-25% by weig... | 11/02/1993 |
| 5076866 | Heat resistant slide member for internal combustion engine A heat resistant slide member for an internal combustion engine is a plastically worked member formed from a quenched and solidified aluminum alloy, with a metal flow line in a sliding portion thereof set in a sliding direction. The aluminum alloy contain... | 12/31/1991 |
| 5056219 | Method of manufacturing hollow engine valve A method of manufacturing a hollow engine valve includes the steps of inserting a core of free-cuting metal into a pipe material of heat-resistant steel to provide a shaping stock, shaping the shaping stock into a rough valve profile of a mushroom shape, ... | 10/15/1991 |
| 5054195 | Process for the production of a valve A process for the production of a valve, in particular a charge cycle valve of an internal-combustion engine, having a separately produced hollow valve shank with a widening shank section arranged at the valve-side end, which is connected to a valve disk ... | 10/08/1991 |
| 4926534 | Method for manufacturing a poppet valve head A poppet valve head with its stem, is formed in a female finish forming die cooperating with two male die members. A cylindrical raw blank, which has been heated is cut to length. An extrusion pressing or molding forms the shaft region and widened shaft r... | 05/22/1990 |
| 4190941 | Method of making cooled valves for internal combustion engines and valves obtained thereby The invention relates to a method of manufacturing cooled valves for internal combustion engines. From a first cylindrical billet is formed a valve blank by drilling an axial blind bore therein and machining an inner circumferential groove at the blind en... | 03/04/1980 |
