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发明公开
CN101545468A 泵装置 无效 - 撤回

泵装置
摘要：
本发明涉及一种泵装置，其不会降低泵效率，而能够防止当活塞位于上死点时，活塞的前端和缸体相碰，或产生振动及损伤，能够实现耐久性的提高，并且能够使用于连通缸体室和喷出孔的缸体的结构简单。当活塞(8)位于上死点时，使所述活塞(8)的前端及缸体(7)的与所述活塞(8)的前端相对的面(7a)位于设有喷出用止回阀(16)的喷出孔(14)的宽度(A)的范围内，并且在所述活塞(8)的前端和所述缸体(7)的与活塞(8)的前端相对的面(7a)之间形成与所述喷出孔(14)连通的间隙。
摘要（英）：

The invention relates to a pump apparatus, which is capable of preventing generation of shock and damage due to collision between the front end of the piston and the cylinder when the piston is at the upper dead point, implementing durability enhancement, and simplifying the structure of the cylinder for communicating the cylinder chamber and injection holes. When the piston is located at the upper dead point, the front end of the piston and the surface of the cylinder opposite to the front end of the piston is disposed in the width range equipped with the injection hole of the check valve for injection, and an interval communicating with the injection holes is disposed between the front end of the piston and the surface opposite to the front end of the piston.

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