US2013017107A1PendingUtilityA1

Diesel engine fuel injection pump which pistons are sealed with all metal seal rings

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Assignee: NEO MECHANICS LTDPriority: Jul 14, 2011Filed: Jul 13, 2012Published: Jan 17, 2013
Est. expiryJul 14, 2031(~5 yrs left)· nominal 20-yr term from priority
Inventors:Kyong Tae Chang
F04B 1/0448F04B 53/166F04B 1/0421F04B 53/164
42
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Claims

Abstract

An injection fuel pump, comprising: a pump body; a drive shaft assembled into the pump body; a piston-drive cam assembled on to the drive shaft; and one or more cylinder heads, each comprising: a pump piston inserted in a cylinder bore, wherein the pump piston is fitted with one or more all-metal-seal rings; wherein the pump piston that is fitted with one or more all-metal-seal rings having a cross-sectional area that is the same as the cylinder bore cross-sectional area, as such creating zero internal leakage. In one embodiment, the all-metal-seal rings are coiled felt seals.

Claims

exact text as granted — not AI-modified
1 . An injection fuel pump, comprising:
 a pump body;   a drive shaft assembled into the pump body;   a piston-drive cam assembled on to the drive shaft; and   one or more cylinder heads, each comprising:
 a pump piston inserted in a cylinder bore, wherein the pump piston is fitted with one or more all-metal-seal rings; 
   wherein the rotation of the drive shaft creates reciprocation of the pump piston; and   wherein the pump piston that is fitted with one or more all-metal-seal rings having a cross-sectional area that is the same as the cylinder bore cross-sectional area, as such creating zero internal leakage.   
     
     
         2 . The injection fuel pump of  claim 1 , wherein the all-metal-seal rings being coiled felt seals.

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