Internal-combustion engines – Poppet valve operating mechanism – Tappet
Patent
1986-03-05
1987-08-18
Lazarus, Ira S.
Internal-combustion engines
Poppet valve operating mechanism
Tappet
123 9055, F01L 124
Patent
active
046869476
ABSTRACT:
An hydraulic cup-shaped valve tappet for internal combustion engines with overhead camshaft comprising an outer hollow cylindrical housing (7) closed at one end by a bottom (3) in which is provided, concentrically radially spaced, a guide tube starting from the bottom, and in which is supported a longitudinally moveble plunger (5) of an hydraulic clearance compensation element, against the face thereof the end of a valve stem is abutting, a control cam (4) abutting against the bottom of the housing, characterized in that in the circular space between the cylindrical internal surface of the housing (7) and the external surface of the guide tube (8) a bellow element (16,21,25,31) is provided, said element being tightly connected, on the one hand, with the internal surface of the housing (7) and, on the other hand, with an end of the plunger (5) projecting from the guide tube which is capable to simultaneously take up variations in length and in volume and which together with the remaining tappet components define an oil-filled internal space completely closed outwardly.
REFERENCES:
patent: 2109459 (1938-03-01), Best
patent: 2109809 (1938-03-01), Van Ranst
patent: 2109815 (1938-03-01), Best
patent: 2746437 (1956-05-01), Van Slooten
patent: 2873729 (1959-02-01), Van Slooten
patent: 2925074 (1960-02-01), Dadd
patent: 4590899 (1986-05-01), Kowal et al.
patent: 4610225 (1986-09-01), Comosso et al.
patent: 4624225 (1986-11-01), Kowal
Lazarus Ira S.
Motomak Motorenbau, Maschinen-und Werkzeugfabrik Konstruktionen
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