Tappet retainer assembly

Details Tappet retainer assembly Tappet retainer assembly

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 9/02 (2006.01) F02M 57/02 (2006.01) F02M 59/48 (2006.01) F16B 21/16 (2006.01) G05G 5/06 (2006.01)

Patent

CA 2063420

-20- Abstract of the Disclosure TAPPET RETAINER ASSEMBLY 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 (10) which includes a housing (16), a tappet (18), a stop device (22), and a biasing device (24). The tappet (18) includes an internal passage (44) which allows the stop device (22) and biasing device (24) to be communicated to their final assembled position in the internal passage (44) while the tappet (18) is already inserted in a bore (28) of the housing (16).

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