Title:
長ピストン液圧機械
Document Type and Number:
Japanese Patent JP2007535633
Kind Code:
A
Abstract:
Smaller and lighter hydraulic pump/motors provide remarkably improved volumetric efficiency with pistons having body portions substantially as long as the axial length of the respective cylinders in which they reciprocate. A plurality of respective lubricating channels form a single, continuous lubricating passageway entirely within the cylinder block and not connected by either fluid "input" or fluid "output" passageways, being replenished solely by a minimal flow of fluid to and from the valve end of each cylinder and passing between each respective cylindrical wall of each cylinder and the axial cylindrical body of each respective piston. Several embodiments are disclosed in combination with various spring-biased hold-down assemblies. The preferred embodiment includes a fixed cylinder block, a roller bearing mounting between the wobbler and rotor of a split-swash plate, with piston shoes contacting the wobbler directly without any intermediary apparatus.
Inventors:
Griesman, Vernon Yee
Greaseman, Keith Yee
Urona, Matthew Earl
Greaseman, Keith Yee
Urona, Matthew Earl
Application Number:
JP2007500745A
Publication Date:
December 06, 2007
Filing Date:
October 12, 2004
Export Citation:
Assignee:
Tovek Incorporated
International Classes:
F04B1/16; B60K17/00; B60K17/10; F03C1/06; F04B1/12; F04B1/29; F04B27/10; F16H39/14; F16H47/04
Attorney, Agent or Firm:
Kazuo Shamoto
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita