Mini diving system

Disclosed is a mini diving device that provides diving in a limited depth of water of extended periods of time. The diving device (FIG. 1) is comprised of a low pressure regulator (FIG. 2). An air intake line which includes an expandable hose. Attached to the air intake line is a waterproof vessel container enclosing a battery operated air pump. The pump draws air from the surface of the water through a vertical extended tubing.

BACKGROUND OF THE INVENTION 
The desire to probe under water for recreational purposes or emergencies or 
maintenance care of boats is an ongoing need. The first interest being 
well stated in numerous patents. Between the limitation of snorkels and 
the complication of scuba systems, several attempts to find a solution to 
limited diving between the two aforementioned have resulted in the 
following approaches: Prior art cites gasoline engines, motors, pumps, 
batteries, trailing pressure tanks and an assortment of these well known 
items being placed on ties, flotation devices and other assorted vessels. 
These assortments of well known machinery were all intended to generate 
pressurized air which would be conveyed by a hose or tubing to a standard 
diving regulator. 
All the flotation systems cited suffer from a number of disadvantages: 
(a) The most underlying problem is the complication and pressure demanded 
by available scuba regulators. 
(b) The size and bulk requires large and unwieldy flotation devices, none 
of which could be easily transported. 
(c) The combined costs for all the required pieces of equipment would have 
excluded it from the recreational market. 
(d) Systems citing the use of gasoline engines incur dangers with 
complicated engines emitting toxic fumes in close proximity of air intakes 
for divers. 
(e) Any battery system that could provide the necessary liters per minute 
of air on demand would be enormous and not portable in the realistic 
sense. 
There is one exception to this effort to find a middle solution to diving, 
that being U.S. Pat. No. 4,938,211 by Takahashe et al. It is both very 
novel and workable. It operates on a very different principle than the 
present invention however, using a closed system avoiding the standard 
regulator. The basic drawback is the need to change cartridges every 10 to 
20 minutes. And again retail sales price limits the market.

DESCRIPTION OF INVENTION 
With reference now to the drawings, and in particular to FIG. 1 thereof, 
herein shall be described a new underwater breathing device embodying the 
principles and concepts of the present invention and generally designated 
by the reference numeral 1. More specifically, it will be noted that the 
breathing device FIG. 2 essentially comprises a hollow chamber 20 with 
three ports: mouthpiece port 40, intake port 22 and exhaust port 39. 
Intake housing 22 supports a fixed intake tube 24 which has a 
circumferential line of ports 25. Tube 24 slideably supports axially 
moveable sleeve 26 which also has a circumferential line of ports 27. Cap 
28 seals the end of sleeve 26 opposite to tube 24. Connected to the cap 28 
by fastener 36 is a rubber diaphram 32 which is secured by tube 30 and 
retainer ring 34. 
Axial movement of diaphram 32, secured to coaxial sleeve 26 causes sleeve 
26 to slide along coaxial fixed tube 24. When diaphram 32 is fully 
depressed as a result of air being inhaled through mouthpiece port 40 
sleeve 26 slides along tube 24 allowing circumferential ports 27 on tube 
26 to align with circumferential ports 25 on sleeve 24, releasing air from 
intake housing 22 through tube 24 to mouthpiece port 40. 
As a result of air being exhaled through mouthpiece port 40 diaphram 32 
expands out, moving sleeve 26 axially along tube 24 and thereby 
misaligning circumferential holes 27 on tube 26 with circumferential holes 
25 on sleeve 24. Exhaled air is therefore blocked from back-flowing to 
intake housing 22 and instead is expelled through conventional check valve 
38 and out through exhaust port 39. 
Covered buoyant container 14 houses a conventional electric-motor powered 
air pump and battery, the source of air to intake housing 22. Extending 
through waterproof lid 15 of container 14 are battery posts 42, a 
conventional toggle switch 44 to control the electric motor, and intake 
tube 16 to supply air to air pump. The air from the air pump reaches 
regulator intake housing 22 through an arrangement of connected flexible 
tubes. Ordinary flexible tubing 12 carries air from the air pump to 
accumulator tubing 10. Tubing 10 connects to corrugated hose 4 at a clip 
connection 8 which secures tubings 10 and 4 to vest 6. Corrugated hose 4 
carries air to intake housing 22. 
While there have been described what is at present considered to be the 
preferred embodiment of a mini diving system, it will be obvious to those 
skilled in the art that various changes and modifications may be made 
therein without departing from the invention. It is aimed therefore in the 
appended claims to cover all such changes and modifications as fall within 
the true spirit and scope of the invention so that others may, by applying 
current and future knowledge, adopt the same for use under various 
conditions of service.