1. An air intake device for an internal combustion engine, comprising:
a first air chamber formed with a first opening for aspirating air into said first air chamber;
a first induction duct extending between an inlet opening leading into said first air chamber and an outlet opening through which said first induction duct communicates with an inlet duct of a cylinder head of the internal combustion engine;
a second induction duct;
a second air chamber formed with a second opening, said second air chamber being coupled to said second induction duct and being pivotally mounted together with said second induction duct into a first pivot position in which said first air chamber communicates with said first opening and into a second pivot position in which said second opening communicates to aspirate air from said first opening and substantially closes said first opening relative to said first air chamber;
wherein:
in the first pivot position of said second induction duct, air to be inducted by the internal combustion engine flows through said first opening into said first air chamber and into said first induction duct; and
in the second pivot position of said second induction duct, said first opening and said second opening are coupled to each other and form a seal, air to be inducted flows through said first opening and directly through said second opening into said second air chamber, and through said second induction duct into said first induction duct.
2. The air intake device according to claim 1, which further comprises a third induction duct, and wherein, in the first pivot position of said second induction duct, the air to be inducted either flows from said first air chamber directly into said first induction duct or flows from said first air chamber through said third induction duct into said first induction duct, and, in the second pivot position, the air flows through said second induction duct, through said third Induction duct, and subsequently through said first induction duct.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. The combination comprising:
at least one scuba diver’s compressed air cylinder;
a backpack for holding said at least one cylinder on a scuba diver’s body; and
a buckle assembly for securing said at least one cylinder to said backpack, said assembly having first and second strap bands and a buckle receiving respective first ends of said bands in tightened engagement around said at least one cylinder, respective opposed second ends of said bands being affixed to said backpack;
one of said first ends of said bands being affixed to said buckle and the other of said first ends of said bands having a plurality of sequential grooved teeth, said buckle having a ratchet lever for engaging said teeth.
2. The combination recited in claim 1 wherein said buckle further comprises a spring for biasing said ratchet lever into forceful engagement with said teeth.
3. The combination recited in claim 1 wherein said ratchet lever is configured for selective elevation about a pin to disengage said lever from said teeth for releasing said at least one cylinder from said backpack.
4. The combination recited in claim 1 wherein said buckle further comprises a cam-shaped cover for closure of said buckle, said cover positioned for both covering said ratchet lever and tightening said band affixed to said buckle around said at least one cylinder upon closure of said buckle.
5. The combination recited in claim 1 wherein said first and second strap bands are made of a material which resists stretching under tension even when wet.
6. The combination comprising:
a compressed gas container;
a backpack for holding said container on a person’s body; and
a buckle assembly for securing said container to said backpack, said assembly having at least one strap band affixed to said backpack and a buckle receiving respective opposed ends of said at least one strap in tightened engagement around said container, one of said respective opposed ends of said at least one strap band being affixed to said buckle and another of said respective opposed ends having a plurality of sequential grooved teeth, said buckle having a ratchet lever for engaging said teeth.
7. The combination recited in claim 6 wherein said buckle further comprises a spring for biasing said ratchet lever into forceful engagement with said teeth.
8. The combination recited in claim 6 wherein said ratchet lever is configured for selective elevation about a pin to disengage said lever from said teeth for releasing said container from said backpack.
9. The combination recited in claim 6 wherein said buckle further comprises a cam-shaped cover for closure of said buckle, said cover positioned for both covering said ratchet lever and tightening said band affixed to said buckle around said container upon closure of said buckle.
10. The combination recited in claim 6 wherein said at least one strap band is made of a material which resists stretching under tension even when wet.