Tappet retainer assembly

Details Tappet retainer assembly Tappet retainer assembly

1990-07-02

1991-04-30

Schwadron, Martin P.

Machine element or mechanism

Control lever and linkage systems

Elements

2671661, 251337, G05G 506

Patent

active

050107836

ABSTRACT:
Conventional tappet retainer assemblies for a fuel injection pump typically include a blind radial passage formed in a tappet. Only one opening in the passage is available for inserting and removing a ball bearing or spring and stop pin which must be held in place before the tappet is inserted in a housing bore. In such an arrangement, the ball bearing or compressed spring and stop pin are prone to pop or fall out before the passage opening is closed by an internal wall of the housing bore. The present invention provides an improved tappet retainer assembly which includes a housing, a tappet, a stop device, and a biasing device. The tappet includes an internal passage which allows the stop device and biasing device to be communicated to their final assembled position in the internal passage while the tappet is already inserted in a bore of the housing.

REFERENCES:
patent: 3027844 (1962-04-01), Kruk-Strzelecki
patent: 3276760 (1966-10-01), Last et al.
patent: 3759637 (1973-09-01), Vuaille
patent: 4260132 (1981-04-01), Habiger
patent: 4267977 (1981-05-01), Stockner et al.
patent: 4452574 (1984-06-01), Leblanc et al.
patent: 4526519 (1985-07-01), Mowbray et al.
patent: 4527738 (1985-07-01), Martin
patent: 4648556 (1987-03-01), Leblanc et al.
patent: 4741478 (1988-05-01), Teerman et al.
"3176 Diesel Truck Engine-Systems Operation Testing and Adjusting", Form No. SENR3909-01, Published: Jul. 1988, by Caterpillar Inc., excerpts: pp. 22-23.

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