GAS CYLINGER
A gas cylinder, such as a scuba tank, is formed with raised ribs that extend longitudinally from near the top of the cylinder to near the bottom of the cylinder. The longitudinal ribs may be arcuate and equally spaced along the outside circumference of the cylinder so as to protect the body of the cylinder from damage. The gas cylinder may be made from steel or an aluminum alloy, such that the longitudinal ribs are formed by backward impact extrusion. The gas cylinder may be configured with a cylindrical neck at the top of the body so as to house a valve and valve stem. The gas cylinder may be transported using a wheeled pedestal having an adjustable strap for securing the cylinder to the pedestal. A valve protector with an optional handle and retaining clip is provided.
This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60/583,297, filed Jun. 24, 2004, the content of which is hereby incorporated herein by reference.
BACKGROUND OF THE INVENTIONThe present invention relates to gas cylinders, and more particularly to mixed gas cylinders, compressed air cylinders, oxygen cylinders, carbon dioxide cylinders and acetylene cylinders.
Gas cylinders, such as scuba tanks, are containers for compressed air and other gases, such as oxygen and carbon dioxide. Many gas cylinders are equipped at the top with a valve for regulating gas flow, and the type of a valve will depend on its intended use. Generally, gas cylinders are made of aluminum and/or steel. A steel cylinder is stronger and it can hold more gas per cubic foot than an aluminum cylinder. Steel, however, has some disadvantages, for example, steel is heavier than aluminum, steel rusts, and although the exterior can be galvanized to prevent corrosion, the interior cannot because the zinc used in the galvanizing process may adversely affect gas purity.
Gas cylinders made from aluminum provide an improvement over those made from steel because they are lighter. In addition, aluminum cylinders do not rust; instead, the aluminum oxidizes (i.e., anodizes) and forms a film which protects against corrosion. These advantages, however, are more than offset by the fact that aluminum is a relatively soft metal whose malleable properties make it susceptible to denting and gouging. Damage can also result when gas cylinders roll and hit against one another. Because of this “rolling” tendency, gas cylinders may be placed in a fabric or plastic sleeve; however, the use of such sleeves does not always prevent the tanks from becoming severely damaged.
Furthermore, aluminum cylinders have an exterior surface which (like steel), is smooth and featureless. This makes them difficult to grasp and carry. Accordingly, when they are moved from one location to another, the tendency is to hoist and carry them by the valve stem and this, when repeatedly done, will ultimately cause damage to the valve assembly.
A scuba cylinder has been disclosed in the prior art that is configured so that it does not roll. The cylinder includes a body that is triangular in cross section having sloped panels. The outer surface of the body is circumscribed with longitudinally extending channels that direct the flow of water evenly over its surface. Included on the cylinder body, on adjacent panels, are elongated recesses and cowls that serve as finger-gripping handles. However, the longitudinal channels do not prevent damage to the gas cylinder, and the handles must be molded, cast or otherwise formed into the body of the gas cylinder.
Accordingly, there is a need for a gas cylinder that is resistant to damage to the cylinder wall. Also, there is a need for a device that allows the cylinder to be easily lifted and moved from one location to another.
SUMMARY OF THE INVENTIONThe present invention is directed to gas cylinders such as, but not limited to, mixed gas cylinders, compressed air cylinders, oxygen cylinders, carbon dioxide cylinders and acetylene cylinders. Such gas cylinders that may be adapted with the present invention include, but are not limited to, scuba cylinders, medical cylinders, industrial cylinders and paintball cylinders.
The gas cylinder of the present invention includes ribs added to the outside diameter of the body of the cylinder, which may be made from an aluminum alloy, steel or other suitable material. The ribs run the longitudinal length of the gas cylinder, beginning at or near the shoulder (below the valve stem) of the gas cylinder. The ribs continue along the outside wall of the gas cylinder to proximate the base of the cylinder. The ribs may be formed on or within the wall of the gas cylinder by backward impact extrusion, or other suitable metallurgical processes known to those of ordinary skill in the art. The gas cylinder may be configured with various outside diameters (e.g., from about three inches to about ten inches) and with various lengths (e.g., from about nine inches to about fifty inches) so as to adapt the present invention to various uses of such cylinders.
Additional improvements to the prior art gas cylinders in accordance with the present invention include a valve protector and a carrier having a roller. The valve protector may also be used as a lifting handle. The valve protector is conical in shape, having an opening in the base (wider end) sufficient to fit over the valve stem of the gas cylinder. The top (narrow end) of the valve protector may also be open to engage the top of the valve stem, and may be removably secured to the valve stem by a split retaining ring. The valve protector further has a partial cutout on a first side of its body that connects to the valve protector's open base for easy connection of a hose or other connector to the valve. The valve protector may have a substantially rectangular cutout on a second side of the body of the valve protector. The valve protector may be made from any suitable material strong enough to protect the valve stem from damage, for example, aluminum alloys, steel alloys, and thermoplastics.
The gas cylinder carrier of the present invention includes a base having a cylindrical wheel, axle and a wheel support structure. The base and wheel are detachably secured around the outside circumference (wall) of the gas cylinder with a strap having a quick release attachment mechanism, such as hook-and-loop fasteners (VELCRO), a buckle or other suitable device. The wheel and base may be made from any suitable material strong enough to support the gas cylinder during movement, for example, aluminum alloys, steel alloys, thermoplastics and synthetic or natural rubber. The strap may be made from any suitable material strong enough to secure the gas cylinder to the wheel base during movement.
The advantages for configuring the gas cylinder with the ribs of the present invention include, but are not limited to: (i) better structure design than existing designs; (ii) the ribs will protect a foreign object hitting the outside diameter of the cylinder from being used in service; and (iii) handling the ribbed cylinder when wet or dry is easier than the existing design. The advantages for adding a valve protector include, but are not limited to: (i) increased safety when using a gas cylinder since the valve protector will protect the valve from being damaged or broken off thereby preventing a serious accident; (ii) carrying the cylinder or pulling the cylinder with a wheel support roller attached with a hook-and-loop fastener around the diameter proximate the bottom of cylinder; and (iii) helping a diver in distress by pulling the diver using the hand grip valve protector.
Other features and advantages of the invention will become apparent from the accompanying drawings, which illustrate, by way of example, the features of the invention.
The present invention is directed to gas cylinders such as, but not limited to, mixed gas cylinders, compressed air cylinders, oxygen cylinders, carbon dioxide cylinders and acetylene cylinders. Such gas cylinders that may be adapted with the present invention include, but are not limited to, scuba tanks, medical cylinders, industrial cylinders and paintball cylinders.
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While this specification describes particular embodiments of the present invention, those of ordinary skill can devise variations of the present invention, including different dimensions and materials of construction, without departing from the inventive concept. Accordingly, it is not intended that the invention be limited except by the appended claims.
Claims
1-15. (canceled)
16. An apparatus for transporting a cylinder having a body including a first end and a second end, a neck formed on the first end of the cylinder body, and a valve partially disposed in an opening of the neck, the apparatus comprising:
- a pedestal having a flange and configured to support the second end of the cylinder;
- a wheel; and
- means for rotatably securing the wheel to the pedestal.
17. The apparatus of claim 16, further comprising a strap and a fastening device configured so that the pedestal may be removably secured to the cylinder.
18. The apparatus of claim 16, further comprising a valve protector configured to fit over the valve.
19. The apparatus of claim 18, wherein the valve protector is configured with a conical shape.
20. The apparatus of claim 18, wherein the valve protector is configured with a handle portion.
Type: Application
Filed: Aug 25, 2010
Publication Date: Dec 23, 2010
Inventor: Ian Albert (Avalon, CA)
Application Number: 12/868,708
International Classification: B65D 25/20 (20060101); B65D 25/28 (20060101);