U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Did You Know...

...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.

Newsletter  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.

 

Class 29/888.03 - Valve lifter making


Subclass of Class 29 - Metal working
Definition: Process wherein the manufactured article is (1) especially
No. of patents: 21
Last issue date: 06/03/2008


NumberTitleIssue Date
7380531Variable valve drive for changing the control timing of cam-actuated gas-exchange valves
A variable valve drive for changing control timing of cam-actuated gas-exchange valves of an internal combustion engine is provided, with a tappet (6a, 6b, 6c), which, with convex cam engaging contour (5), engages a c...
06/03/2008
7308760Method of making a valve lifter
A valve lifter and a method of manufacture thereof is provided in which sliding properties of a cam on a cam-contacting sliding surface in an upper surface of a valve lifter are improved by forming the cam-contacting sliding surface as a concave surface to permit re...
12/18/2007
7284520Valve lifter body and method of manufacture
The present invention relates to a lash adjuster body, comprising A lash adjuster body, comprising an outer surface, enclosing a cavity, wherein the cavity includes an inner surface configured to accommodate an insert and a spring; and the cavity is fabricated throu...
10/23/2007
7281329Method for fabricating a roller follower assembly
The present invention relates to a method for fabricating a roller follower assembly, comprising the steps of fabricating a lash adjuster body, fabricating a roller follower body, fabricating a leakdown plunger, fabricating a socket, wherein at least one of the lash...
10/16/2007
7246586Wear-resistant coating and process for producing it
The present invention relates to a process for producing a wear-resistant coating and to a wear-resistant coating on predetermined surfaces of machine or engine parts, in particular for internal combustion engines, which are exposed to frictional wear, comprising at...
07/24/2007
7207302Valve lifter body
The present invention relates to a valve lifter body, comprising an outer surface, enclosing a first cavity and a second cavity, wherein the first cavity includes a first inner surface configured to house a cylindrical insert, the second cavity includes a second inn...
04/24/2007
7128034Valve lifter body
The present invention relates to a valve lifter body, comprising an outer surface, enclosing a first cavity and a second cavity, wherein the first cavity includes a first inner surface configured to house a cylindrical insert, the second cavity includes a second inn...
10/31/2006
6971356Engine pushrod
An engine pushrod which includes a plastic shaft in the form of a rod or tube, and a metal cap on at least one of the ends of the plastic shaft. The plastic shaft may be a molded plastic rod made from an engineered resin material, and may take one of several differe...
12/06/2005
6941915Hydraulic lash adjuster and improved method of assembly thereof
A hydraulic lash adjuster (11) for an internal combustion engine, and an improved method of assembly of such a lash adjuster. The lash adjuster (11) is of the type having a body (13), a plunger (15), and a check valve assembly (17)...
09/13/2005
6089200Valve tappet actuated by a CAM of an internal combustion engine
A valve tappet actuated by a cam of an internal combustion engine comprises a cup (1) having a hollow cylindrical skirt (2) and a cup bottom (3) which closes the skirt (2) at one end. On an outer surface, the skirt (2) comprises a peripheral groove (4), a...
07/18/2000
5970613Method of manufacturing a wear resistant cylinder
A tappet made of Al alloy is used in a valve operating mechanism of an internal combustion engine of a vehicle. On the whole outer circumferential surface of the tappet, a helical projection and a helical groove are formed alternately to form an uneven su...
10/26/1999
5904123Mechanical valve tappet
A mechanical valve tappet for timing the valves of an internal combustion engine comprising a cup-shaped housing (1), consisting of a hollow cylindrical wall (2) closed at one end by a bottom (3) which is exteriorly contacted by a control cam (6), while o...
05/18/1999
5787583Apparatus and method for setting a valve lift
An apparatus and a method are proposed for adjusting a valve lift, particularly a valve needle lift of an injection valve of an internal combustion engine, wherein a valve seat, which is preset in a housing of the valve (20), is axially displaceable in th...
08/04/1998
5390843Method of producing a carburized ceramic-steel joined body
A ceramic-steel joined body includes a ceramic body of silicon nitride, zirconia, silicon carbide, boron nitride, and alumina. The joined body also includes a steel body which has its surface carburized so that the hardness of the surface is greater than ...
02/21/1995
5349748Method of manufacturing a tappet for an internal combustion engine
A method of manufacturing a tappet used in a valve operating mechanism of a direct acting type in an internal combustion engine. A tip engaged with a center bore of an inner upper surface of a tappet body includes upper and lower convex surfaces and a rou...
09/27/1994
5185923Method of making a frictionally sliding component
In a frictionally sliding structure, a metallic intermediate member is provided, which has a head and a stud. The stud is interfit into a recess provided with a tappet, while the head has a ceramic chip on which a cam is adapted to frictionally slide....
02/16/1993
4907330Sintered body assembly formed from a plurality of independent compacts and method of producing same
A sintered body assembly having an inner section and an outer section is formed from independent inner and outer compacts corresponding to the inner and outer sections, respectively. The inner and outer compacts are so shaped that a predetermined clearanc...
03/13/1990
4850095Method of forming crowned sliding surface in mechanical part
A mechanical part comprises a sliding section and a sleeve section which are prepared separately. The sliding section is made of a wear resisting material such as ceramics and formed with a planar sliding surface at one of the sides thereof. The sliding s...
07/25/1989
4829950Valve lifter and method of producing the same
A valve lifter has a cylindrical lifter body portion made of an alloy tool steel which body portion extends in the axial direction of the valve lifter, and a head portion made of the alloy tool steel and formed integrally with the body portion which head ...
05/16/1989
4524731Hydraulic valve lifter with continuous void
A hydraulic valve lifter for use in high performance engines to reduce valve overlap at low operating speeds utilizes a restricted oil bleed passageway leading from the lifter pressure chamber to externally of the lifter to permit oil to bleed from the pr...
06/25/1985
4475490Hydraulic valve lifter
The present invention proposes a hydraulic valve lifter used in an internal combustion engine. The valve lifter has a body consisting of a hollow cylindrical portion accommodating a cylindrical plunger and a lower end portion engaging with a cam controlli...
10/09/1984
 
Sign InRegister
Username  
Password   
forgot password?