Pump apparatus and marine vessel propelling machine

Patent metadata

Field	Value
Publication number	US-9885355-B2
Application number	US-201514866039-A
Country	US
Kind code	B2
Filing date	Sep 25, 2015
Priority date	Mar 12, 2015
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

Abstract

A pump apparatus includes a shaft, a first pump, and a second pump. The first pump includes a first driving gear disposed on the shaft in a first phase and rotatable with the shaft to feed a first operating fluid. The second pump includes a second driving gear disposed on the shaft in a second phase shifted from the first phase. The second driving gear is coaxial with the first driving gear and rotatable with the shaft to feed a second operating fluid.

First claim

What is claimed is:

1. A pump apparatus comprising:
a shaft;
a first pump comprising a first driving gear which is disposed on the shaft in a first phase of gear rotation and is rotatable with the shaft to feed a first operating fluid; and
a second pump comprising a second driving gear disposed on the shaft in a second phase of gear rotation, the second driving gear being coaxial with the first driving gear and rotatable with the shaft to feed a second operating fluid, wherein
the second phase is shifted from the first phase in a degree of gear rotation.

2. The pump apparatus according to claim 1 ,
wherein the first driving gear is disposed on the shaft at a first angle, and
wherein the second driving gear is disposed on the shaft at a second angle different from the first angle.

3. The pump apparatus according to claim 1 , wherein the first driving gear and the second driving gear have equal numbers of teeth.

4. A pump apparatus comprising:
a shaft;
a first pump comprising a first pair of gears, the first pair of gears comprising:
a first driving gear disposed on the shaft and being rotatable with the shaft and comprising first teeth; and
a first driven gear engaged with the first driving gear to be driven by the first driving gear so as to feed a first operating fluid, the first driven gear comprising second teeth engageable with the first teeth at a first timing when the shaft rotates; and

a second pump comprising a second pair of gears, the second pair of gears comprising:
a second driving gear disposed on the shaft and being coaxial with the first driving gear and rotatable with the shaft and comprising third teeth; and
a second driven gear engaged with the second driving gear to be driven by the second driving gear so as to feed a second operating fluid, the second driven gear comprising fourth teeth engageable with the third teeth at a second timing different from the first timing when the shaft rotates.

5. The pump apparatus according to claim 4 , wherein the first teeth, the second teeth, the third teeth, and the fourth teeth have equal numbers of teeth.

6. A vessel propelling machine comprising:
a marine-vessel-propelling-machine body comprising a propeller; and
a tilt-and-trim apparatus comprising:
a cylinder apparatus comprising:
a cylinder;
a piston which partitions an inside of the cylinder into a first chamber and a second chamber; and
a piston rod having an end fixed to the piston and extending from the cylinder; and

a pump apparatus configured to supply an operating fluid into an inside of the cylinder apparatus so as to extend and retract the cylinder apparatus, the pump apparatus comprising:
a shaft;
a first pump comprising a first pair of gears, the first pair of gears comprising:
a first driving gear disposed on the shaft and rotatable with the shaft; and
a first driven gear driven by the first driving gear so as to feed a first operating fluid;

a second pump comprising a second pair of gears, the second pair of gears comprising:
a second driving gear disposed on the shaft and being coaxial with the first driving gear and rotatable with the shaft; and
a second driven gear engaged with the second driving gear to be driven by the second driving gear so as to feed a second operating fluid; and

a passage into which the first operating fluid flows at a first timing and into which the second operating fluid flows at a second timing shifted from the first timing.

7. The pump apparatus according to claim 2 , wherein the first driving gear and the second driving gear have equal numbers of teeth.

Assignees

• Showa Corp

Inventors

• Saito Takahiko
• Kagawa Atsushi
• Tsutsui Hayato

Classifications

• F04C11/006

  having complementary function · CPC title

• F01C19/00

  Sealing arrangements in rotary-piston machines or engines (sealings in general F16J) · CPC title

• B63H20/10

  Means enabling trim or tilt, or lifting of the propulsion element when an obstruction is hit; Control of trim or tilt · CPC title

• F04C15/0049

  Equalization of pressure pulses (silencing for compressors F04C29/06) · CPC title

• F01C19/08

  Axially-movable sealings for working fluids · CPC title