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Patent Searching and Data


Title:
PISTON PUMP
Document Type and Number:
Japanese Patent JPH1122637
Kind Code:
A
Abstract:

To increase the sectional area of an inflow passage, in a piston pump for flowing the liquid into a pump chamber in an axial direction of a piston rod, with reduction of a number of components.

Plural through holes 28 are formed on a piston 16 in such manner that they are penetrated through the piston 16 in an axial direction thereof. A shaft 32 is inserted into an insertion hole 31 in a piston rod 12, and is relatively movable in the axial direction to the piston rod 12 with the guide of a projecting part 36 by a slot 34 at a rear edge part. An intake valve 30 is mounted on a front edge part of the shaft 32, and is located at a front side of the piston 16, for opening and closing the through holes 28.


Inventors:
Shoji, Akira
Application Number:
JP1997000195261
Publication Date:
May 15, 1989
Filing Date:
July 07, 1997
Export Citation:
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Assignee:
MARUYAMA MFG CO LTD
International Classes:
B22D11/06; (IPC1-7): B22D11/06
Attorney, Agent or Firm:
石山 博 (外1名)