EP 0285791 A3 19890301 - ASSEMBLY METHOD FOR VALVE STEM SEALS
Title (en)
ASSEMBLY METHOD FOR VALVE STEM SEALS
Publication
Application
Priority
DE 3711436 A 19870404
Abstract (en)
[origin: US4826180A] A valve stem sealing assembly includes a valve spring, a valve spring retainer, and a valve spring seal which is releasably connected either directly or indirectly to the valve spring retainer. Such a valve stem sealing assembly can be installed as a unit during mass production of engines. In one embodiment the valve spring retainer is provided with a sleeve which releasably supports the valve stem seal. Another embodiment includes a protection element on which the valve spring rests to keep it from digging into the metal of the engine. Both the protection element and the valve spring retainer are provided with sleeves in the second embodiment, and these sleeves are releasably connected. The valve stem seal is lodged in the sleeve of the protection element. In both embodiments the releasable connection, which may be provided by force-fitting one element into another, is released after installation of the assembly.
IPC 1-7
IPC 8 full level
F01L 3/08 (2006.01)
CPC (source: EP US)
F01L 3/08 (2013.01 - EP US)
Citation (search report)
- [A] DE 3326811 A1 19850214 - LECHLER ELRING DICHTUNGSWERKE [DE]
- [A] US 3459166 A 19690805 - UPDIKE STANLEY H, et al
- [A] US 3498621 A 19700303 - WILSON ROBERT R
- [A] PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 135 (M-85)[807], 27. August 1981; & JP-A-56 069 412 (MITSUBISHI JIDOSHA KOGYO K.K.) 10-06-1981
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
DE 3711436 C1 19880721; EP 0285791 A2 19881012; EP 0285791 A3 19890301; US 4826180 A 19890502
DOCDB simple family (application)
DE 3711436 A 19870404; EP 88102861 A 19880226; US 17864488 A 19880407