Oil extractor for vehicle engines and the like

• US 4,078,763 A
• Filed: 08/04/1976
• Issued: 03/14/1978
• Est. Priority Date: 08/04/1976
• Status: Expired due to Term

• Current Assignee: Naoyuki Yamamoto
• Original Assignee: Naoyuki Yamamoto
• Inventors: Yamamoto, Naoyuki
• Primary Examiner(s): Schwadron, Martin P.
• Assistant Examiner(s): Walton, G. L.
• Application Number:
  US05/711,601
• Time in Patent Office: 587 Days
• Field of Search: 251/96, 251/98, 251/99, 251/101, 251/102, 251/107, 251/111, 251/114, 251/214, 251/286, 251/288, 251/304, 251/312, 251/315, 137/315
• US Class Current: 251/96
• CPC Class Codes: F16K 35/00 Means to prevent accidental or unauthorised actuation
• CPC Class Codes: F16K 5/0647 Spindles or actuating means
• CPC Class Codes: Y10T 137/6041 Replaceable
• CPC Class Codes: Y10T 137/6096 Lever type

Abstract

This invention relates to a shut-off valve type oil extractor that can be screwed into an oil pan in a vehicle engine or the like, and more particularly it relates to an oil extractor of the said type which is characterized particularly in that it is locked in a shut-off state so that it won'"'"'t be inadvertently opened by mechanical vibration caused during running of the vehicle.

Claims

1. An oil extractor for vehicles or the like comprising

an oil pan of a vehicle engine,

a hollow base block having two open ends, one of said ends constituting an inlet end and formed with a screw thread screwed into said oil pan, and the other of said ends constitutes an outlet end,

a hollow cylindrical bushing portion having an upper open end and communicating at a lower end thereof with said hollow base block between said inlet end and said outlet end thereof and formed with a shaft hole extending therethrough, said shaft hole includes an uppermost portion adjacent said upper open end having an enlarged diameter, and a narrowed diameter portion communicating with said uppermost portion and said hollow base block and forming an upwardly facing annular shoulder adjacent a juncture of said uppermost portion and said narrowed diameter portion.

said bushing portion being formed with an L-shaped recess opening therethrough extending substantially 120°

and having a rectangular shaped lowermost recess portion at one end of said L-shaped recess disposed substantially coplanar to and at the level of said annular shoulder, said L-shaped recess having an upper edge and a lower edge, said upper edge and said lower edge being slightly spaced from one another at portions of said L-shaped recess remote from said lowermost recess portion,

a ball-shaped valve body having a central opening therethrough and being rotatably disposed in said hollow base block adjacent said bushing portion and formed with a substantially rectangular slot in an upper peripheral portion thereof,

a spindle having a cylindrical part slightly smaller in diameter than that of said narrowed diameter portion of said shaft hole and rotatably disposed in said narrowed diameter portion of said bushing portion, said cylindrical part having an upper portion and a bottom, and having a rectangular protuberance formed at said bottom extending into said slot of said valve body, said spindle having a square cross-sectionally shaped stem projecting upwardly from said upper portion thereof, said stem being smaller in width than the diameter of said cylindrical part, said upper portion of said cylindrical part being disposed lower than said annular shoulder of said shaft hole of said bushing portion with said stem projecting above said annular shoulder, an annular seal ring being mounted on a center of said cylindrical part of said spindle and sealingly abutting said narrowed diameter portion of said shaft hole of said bushing portion, said stem has a top thereof disposed at a level between said upper and lower edges of said L-shaped recess remote from said lowermost recess portion,

a handle having a disc shaped end portion, the latter having a diameter substantially equal to but slightly smaller than that of said uppermost portion of said shaft hole and formed with a square opening complementary to said stem, the latter extending therethrough with said disc shaped end portion axially moveable relative thereto, said handle including a substantially flat neck portion substantially coplanar with said disc shaped end portion and passing through said L-shaped recess, and a handle grip extending from said neck portion and bent upwardly relative thereto, said neck portion having a thickness substantially the same as but slightly smaller than the spacing of said upper edge of said L-shaped recess from said lower edge at the portions thereof remote from said lowermost recess portion of said L-shaped recess, said neck portion having a rectangular cross-section substantially complementary to that of said rectangular shaped lowermost recess portion of said L-shaped recess,

said uppermost portion of said shaft hole is formed with an annular recess, a disc being disposed in said annular recess, and a C-shaped stop ring disposed in said annular recess adjacent and above said disc,

a cylindrical columnar insert disposed abuttingly between said disc and the top of said stem of said spindle maintaining a constant engagement of said protuberance of said spindle in said slot of said valve body,

a compression spring disposed around said columnar insert and abutting said disc at one end and pressing on said disc shaped end portion of said handle at the other end in a circular engagement thereagainst,

a retainer disposed in said hollow base body adjacent said outlet end and formed with a central opening therethrough and with a stepped annular surface facing one side of said valve body, an annular seal disposed in said stepped annular surface of said retainer sealingly abutting said one side of said valve body,

said hollow base block being formed with a stepped sealing surface facing another side of said valve body, another annular seal disposed in said stepped sealing surface sealingly abutting the other side of said valve body, said hollow base block being formed adjacent said retainer with an annular groove, an O-ring disposed in said annular groove pressing against said retainer.

said hollow base block having another annular groove adjacent said outlet end, a C-shaped stopper ring disposed in said another annular groove abutting said retainer,

said handle and said valve body being operatively coordinated via said spindle such that said handle is positioned between said upper edge and said lower edge at portions remote from said lowermost recess portion of said L-shaped recess with said disc shaped end portion of said handle adjacent the top of said stem and a bottom of said columnar insert when said valve body is rotated by said handle and said spindle such that said central opening thereof is in communication with said inlet end and outlet end of said hollow base block in an open condition of the extractor,

said disc shaped end portion of said handle abuts said annular shoulder of said shaft hole and said neck portion extends through said lowermost recess portion of said L-shaped recess when said central opening of said valve body is rotated by said handle and said spindle so as to be out of communication with said inlet end and said outlet end of said hollow base block in a closed condition of the extractor.