Hydraulic apparatus for an automatic transmission

• US 4,903,798 A
• Filed: 01/04/1989
• Issued: 02/27/1990
• Est. Priority Date: 10/28/1988
• Status: Expired due to Fees

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Kano, Takenori, Yokoyama, Fumitomo, Takemoto, Haruki, Niimi, Mamoru, Takase, Isao
• Primary Examiner(s): Ostrager, Allen M.
• Application Number:
  US07/293,395
• Time in Patent Office: 419 Days
• Field of Search: 184/6.12, 184/6.21, 184/6.24, 184/11.3, 184/6.2, 74/467
• US Class Current: 184/6.24
• CPC Class Codes: F16H 57/0404 Lubricant filters
• CPC Class Codes: F16H 57/0421 on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
• CPC Class Codes: F16N 39/06 by filtration filters in general B01D; magnetic separators B03C1/00; centrifugal separators or filters B04B5/005
• CPC Class Codes: Y10T 74/19991 Lubrication

Abstract

An intake adapter is provided on an oil intake opening formed in a transaxle casing. A tightly sealed space in communication with an oil pump is provided in the lower part of the transaxle housing, formed in such a manner that it can be opened by the removal of a cover member which is secured to the transaxle casing in a freely mountable and removable manner. An oil strainer is housed in the tightly sealed space and an intake adapter is provided in communication with the tightly space and an oil sump. As a result the oil in the oil sump is taken into the intake opening of the oil strainer from the adapter, and foreign matter such as iron particles and the like is removed in a filter element and the filtered oil is supplied to an oil pump.

Claims

1. A hydraulic device for an automatic transmission comprising a transaxle housing, a transaxle casing, a transaxle cover, and an oil sump formed in the bottom of the transaxle housing wherein the improvement comprises

a tightly sealed space formed in the lower part of the transaxle housing and placed in communication with an oil pump in such a manner that it can be opened by the removal of a cover member which is secured to the transaxle casing in a freely mountable and removable manner;

an oil strainer housed in the tightly sealed space; and

an intake adapter provided for communication between the tightly sealed space and the oil sump.

2. A hydraulic device for an automatic transmission of claim 1 wherein:

the automatic transmission comprises a first shaft positioned concentrically with the engine crank shaft;

a third shaft which serves as the front axle; and

a second shaft such that the first, second and third shafts are positioned on the apex of a triangle;

a torque converter and a fourth speed transmission device comprising forward fourth speed and reverse first speed are arranged on the first shaft;

an under-drive mechanism is positioned on the second shaft for stitching a direct and reduced speed rotation;

a differential device is positioned on the third shaft; and

a valve body is positioned on the side surface of the transaxle casing.