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Class Information
Number: 123/90.67
Name: Internal-combustion engines > Poppet valve operating mechanism > Spring > Seat and retainer
Description: Device wherein means is provided for receiving the fixed end portion of a spring element and/or for retaining the other end portion thereof in engagement with a valve or its operating mechanism.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8573172 Camshaft Nov. 5, 2013
8312853 Valve spring device and valve train of engine using the same Nov. 20, 2012
8297603 Spring retainer and spring system Oct. 30, 2012
8136496 Valve rotator assembly Mar. 20, 2012
8079339 Reciprocable member with anti-float arrangement Dec. 20, 2011
7997242 Spring retainer and spring system Aug. 16, 2011
7878166 Device and method for retaining a valve bridge Feb. 1, 2011
7559302 Thermally insulating element for an engine valve assembly Jul. 14, 2009
7556006 Valve mechanism of engine Jul. 7, 2009
7401582 Camshaft phaser having designated contact vane Jul. 22, 2008
7305951 Two-step roller finger follower Dec. 11, 2007
7165521 Variable valve timing control device Jan. 23, 2007
7156058 Variable valve actuator Jan. 2, 2007
6966539 Valve spring retainer Nov. 22, 2005
6886513 Valve mechanism comprising a variable cross-section of a valve opening May. 3, 2005
6564764 Switchable tappet for directly transmitting a cam lift onto a tappet push rod May. 20, 2003
6532925 Stamped valve spring and retainer Mar. 18, 2003
6505593 Valve spring set load changing device in a valve moving apparatus of an internal combustion engine Jan. 14, 2003
6450138 Valve timing adjusting device Sep. 17, 2002
6382153 Partial internal guide for curved helical compression spring May. 7, 2002
6371063 Valve-open-close mechanism Apr. 16, 2002
6341588 Valve spring retainer and a valve operating mechanism Jan. 29, 2002
6338325 Valve operating mechanism of an internal combustion engine Jan. 15, 2002
6311661 Valve spring retainer and a valve operating mechanism Nov. 6, 2001
6293240 Valve spring retainer and a valve operating mechanism Sep. 25, 2001
6279526 Valve gear for an internal-combustion engine Aug. 28, 2001
6273046 Valve spring retainer with skirt Aug. 14, 2001
6273045 Valve spring retainer-enlarged slots Aug. 14, 2001
6082315 Electromagnetic valve actuator Jul. 4, 2000
6062181 Arrangement for an electromagnetic valve timing control May. 16, 2000
5873563 Valve Lock Feb. 23, 1999
5743225 Valve system for engine Apr. 28, 1998
5664531 Device for adjusting valve duration using external air supply Sep. 9, 1997
5662075 Universal valve lifter block and cap for motorcycle engines Sep. 2, 1997
5619961 Poppet valve retainer system for internal combustion engine Apr. 15, 1997
5596964 Intake and exhaust valves and intake port of internal combustion engine Jan. 28, 1997
5558054 Variable preload system for valve springs Sep. 24, 1996
5497740 Ceramic valve for internal combustion engines having a reduced tendency to stress fracture Mar. 12, 1996
5385125 Four cycle engine Jan. 31, 1995
5381765 Valve spring retainer Jan. 17, 1995
5357918 Valve operating mechanism for internal-combustion engines Oct. 25, 1994
5343835 Valve spring retainer Sep. 6, 1994
5322039 Valve spring top collar Jun. 21, 1994
5313917 Self-aligning valve assembly May. 24, 1994
5293848 Spring retainer for a poppet valve and method of assembling Mar. 15, 1994
5275376 Spring retainer Jan. 4, 1994
5255640 Bi-plastic self-locking valve spring retainer Oct. 26, 1993
5143351 Self-locking valve spring retainer Sep. 1, 1992
5121718 Valve and spring arrangement for engine Jun. 16, 1992
5046463 Assembling device for valve actuating components of internal-combustion engines Sep. 10, 1991

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