Air transfer system

• US 4,974,881 A
• Filed: 04/20/1989
• Issued: 12/04/1990
• Est. Priority Date: 04/27/1988
• Status: Expired due to Fees

• Current Assignee: Donaldson Company Incorporated
• Original Assignee: Donaldson Company Incorporated
• Inventors: Engel, Donald F., Gieseke, Steven S.
• Primary Examiner(s): Reese, Randolph A.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/340,909
• Time in Patent Office: 593 Days
• Field of Search: 285/181, 285/253, 285/903, 285/259
• US Class Current: 285/181
• CPC Class Codes: F02M 35/10137 Flexible ducts, e.g. bellows or hoses
• CPC Class Codes: F02M 35/10144 Connections of intake ducts to each other or to another device
• CPC Class Codes: F02M 35/164 Heavy duty vehicles, e.g. trucks, trains, agricultural or construction machines
• CPC Class Codes: F16L 37/084 combined with automatic locking
• CPC Class Codes: Y10S 285/903 Corrugated

Abstract

An air flow conduit system is presented for air flow communication between an air filter mechanism and an engine intake manifold. The conduit system comprises first, second and third substantially rigid conduit members. Engagement between conduit members is provided by a rib system on a narrow end of a conduit member being received within a broad end of a next adjacent conduit member. Sealing engagement occurs by an elastomeric seal member positioned between the ribs and an end of a conduit member within which the ribs are received. A preferred rib arrangement is provided, to insure a flexible, multi-point, seal system.

Claims

1. A conduit member for use in an air flow conduit system;

said conduit member comprising;

(a) a substantially rigid tubular member having;

an inner surface defining an internal passageway;

an outer surface; and

, a connector end portion; and

,

(b) a plurality of spaced annular ribs oriented on said tubular member outer surface;

each of said ribs being spaced between about 0.125 inches and 0.5 inches from the next adjacent rib;

each of said ribs having a sharply defined central ridge.

2. A conduit member according to claim 1 wherein:

(a) said tubular member connector end portion defines a central longitudinal axis;

(b) each of said ribs independently projects outwardly from said tubular member outer surface with a central ridge thereof generally oriented in a plane substantially perpendicular to said longitudinal axis; and

,

(c) said spaced annular ribs project in planes substantially parallel to one another.

3. A conduit member according to claim 1 wherein:

(a) said tubular member connector end portion defines a central longitudinal axis; and

,

(b) said ribs each have a forward side and a rearward side defining one of said central ridges therebetween.

4. A conduit member according to claim 3 wherein:

(a) said tubular member connector end portion defines a central longitudinal axis.

5. A conduit member according to claim 1 wherein:

(a) said tubular member includes a second end opposite said connector end;

said second end being a broad end portion constructed and arranged for receipt therein of a portion of an air conduit system.

6. A conduit member according to claim 1 wherein:

(a) said ribs each have a forward side and a rearward side defining one of said central ridges therebetween;

(i) said rib forward sides generally each facing away from said member outer surface connector end, and each projecting outwardly from said tubular member outer surface at a first obtuse angle with respect to said first longitudinal axis; and

,

(ii) said rearward sides each facing generally oppositely from said forward facing sides and projecting outwardly from said tubular member outer surface at a second obtuse angle with respect to said longitudinal axis.

7. A conduit member/seal combination for use in an air flow conduit system;

said combination comprising;

(a) a substantially rigid tubular member having;

an inner surface defining an internal passageway;

an outer surface; and

, a connector end portion with a first internal passageway.

(b) a plurality of spaced annular ribs oriented on said tubular member outer surface;

each of said ribs being spaced between about 0.125 inches and 0.5 inches from the next adjacent rib;

each of said ribs having a sharply defined central ridge; and

,

(c) an elastomeric seal member positionable in surrounding and overlapping engagement with said spaced annular ribs.

8. A combination according to claim 7 wherein:

(a) said tubular member connector end portion defines a central longitudinal axis; and

,

(b) said ribs each have a forward side and a rearward side defining one of said central ridges therebetween;

(i) said rib forward sides generally each facing away from said tubular member outer surface connector end, and each projecting outwardly from said tubular member outer surface at a first obtuse angle with respect to said first longitudinal axis; and

,

(ii) said rearward sides each facing generally oppositely from said forward facing sides and projecting outwardly from said tubular member outer surface at a second obtuse angle with respect to said longitudinal axis.

9. A combination according to claim 8 wherein:

(a) said second obtuse angle is greater than said first obtuse angle.

10. An engagement arrangement for providing engagement between first and second conduit segments of a conduit system;

said engagement arrangement comprising;

(a) a member having;

an internal surface defining an inner tubular passageway having a central longitudinal axis; and

, an outer surface with a connector end and with a plurality of spaced annular ribs thereon, each of said ribs having a forward side and a rearward side defining a central ridge therebetween;

(i) said rib forward sides generally each facing away from said member outer surface connector end, and each projecting outwardly from said tubular member outer surface at a first obtuse angle of between about 95° and

about 115°

with respect to said first longitudinal axis;

(ii) said rearward sides each facing generally oppositely from said forward facing sides and projecting outwardly from said tubular member outer surface and a second obtuse angle of between about 120° and

about 130°

with respect to said longitudinal axis

(b) whereby sealing engagement between first and second conduit segments of a conduit system is facilitated by orienting said plurality of said spaced annular ribs therebetween.

11. An engagement arrangement for providing engagement between first and second conduit segments of a conduit system;

said engagement arrangement comprising;

(a) a member having;

an internal surface defining an inner tubular passageway; and

, an outer surface with a connector end and with a plurality of spaced annular ribs thereon, each of said ribs being spaced between about 0.125 inches and 0.5 inches from the next adjacent rib, and each of said ribs having a sharply defined central ridge;

(b) whereby sealing engagement between first and second conduit segments of a conduit system is facilitated by orienting said plurality of spaced annular ribs therebetween.

12. An engagement arrangement for providing engagement between first and second conduit segments of a conduit system;

said engagement arrangement comprising;

(a) a member having;

an internal surface defining an inner tubular passageway; and

, an outer surface with a connector end and with a plurality of spaced annular ribs thereon, each said rib projecting outwardly between about 0.07 and 0.11 inches from said tubular member outer surface, and each of said ribs having a sharply defined central ridge;

(b) whereby sealing engagement between first and second conduit segments of a conduit system is facilitated by orienting said plurality of said spaced annular ribs therebetween.