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  Liquid-fillable heavy training bagUSPTO Application #: 20080096733Title: Liquid-fillable heavy training bag Abstract: A liquid-fillable heavy training bag includes a cylindrical flexible outer shell having top and bottom walls to form a generally closed cylindrical inner surface. Suitable support is provided for suspending the cylindrical outer shell from an upper support member, such as a ceiling. A generally cylindrical liquid-impermeable flexible liner is provided within the outer shell for receiving and containing a liquid medium such as water. The liner is configured and dimensioned to generally conform to the shape of the inner surface of the outer shell when the liner is fully expanded, such as when filled with water. An intermediate layer is provided made of compressible material and arranged between and contacting the outer shell and the liner when the liner is filled with liquid. The intermediate layer forms a cushion for absorbing external impacts to the outer shell and absorbs and attenuates shock waves imparted to the liquid medium within the liner to protect the liner and better simulate the feel of a conventional, non-liquid filled heavy bag. (end of abstract)
Agent: Lackenbach Siegel, LLP - Scarsdale, NY, US Inventor: Joseph W. Epstein USPTO Applicaton #: 20080096733 - Class: 482083000 (USPTO) Related Patent Categories: Exercise Devices, Striking The Patent Description & Claims data below is from USPTO Patent Application 20080096733. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The invention generally relates to heavy training bags and, more specifically, to a liquid-fillable heavy training bag. [0003] 2. Description of the Prior Art [0004] Heavy training bags, sometimes referred to as simply heavy bags or training bags, have been used for many years. These types of bags, also commonly called punching bags, are generally sturdy bags designed to be repeatedly punched or kicked for use for exercise or physical training. Such heavy training bags are typically used to improve one or more of the following: physical strength, cardiac fitness, punching techniques or martial arts skills. [0005] While some punching bags may be designed to look at least abstractly realistic as an opponent and assume the human or partial human form, such bags are typically in the form of an elongate cylindrical outer shell and suspended from a chain or other attachment means to secure the heavy bag in a vertical or upright position suspended from an upper support. Such bags can be, for example, 32''-45'' long, approximately 14'' wide and typically weigh 70-100 pounds. Many of these bags are stuffed with a specially blended filler material to absorb punches or kicks without excessive lateral movements as it is intended that these bags provide resilient shock absorbency to somewhat stimulate the shock absorbing properties of an opponent. Depending on the intended feel of the bag, the outer cover may be stuffed with different filler materials. In some cases, dual bag shock absorption systems are provided by including a foam layer or lining in addition to the filler material. [0006] A disadvantage of conventional heavy or training bags is that they are heavy when filled with filler material and are bulky. Most such bags are in their fully expanded conditions, that they assume during use, so that a purchaser can simply remove the bag from the box or other packaging, hang up the bag and start using it. However, while this is convenient for the end user, these bags are heavy and expensive to ship, display, store by retailers and all of these issues increase the cost of the item. One approach that has been proposed to eliminate at least some of these problems is to provide a heavy or training bag that is initially in a collapsed form that can be expanded by the ultimate purchaser or user prior to use. One common design is to provide a bag that has all of the common dimensions of conventional bags but has an inside liner or bladder that can be filled with water or other fluid. The water or liquid is sufficiently heavy so that when the bag is filled up it has the weight and shock absorbent properties that simulate those of conventional fiber-filled bags. These bags have the advantage that they can be shipped and stored in a collapsed form and can also be emptied of the water or fluid when the bag is not to be used for an extended period of time to facilitate storage of the bag. While many liquid filled bags have been proposed, many suffer a number of disadvantages. One disadvantage is that the punches or kicks applied to the bag provide substantial shock waves within the water or liquid and these, especially over time, can have the effect of weakening and ultimately breaking the liner or bladder. This is especially true when the liner or bladder is held in place within a confined space and there is no real area for expansion as a result of punching or kicking actions on the bag. The water or liquid, in such cases, will tend to be displaced in the path of least resistance. This, frequently, is the position in which a closure is provided through which water or liquid can be introduced. If such closure is damaged the bag becomes essentially useless because punches or kicks to the bag will simply cause the water or liquid to be expelled through the damaged closure. Therefore, while water or liquid filled bags have solved some problems they have raised others. SUMMARY OF THE INVENTION [0007] Accordingly, it is an object of the invention to provide a heavy training bag that does not have the disadvantages of prior art of known heavy training bags. [0008] It is another object of the invention to provide a heavy training bag which is simple in construction and economical to manufacture. [0009] It is still another object of the invention to provide heavy training bag of the type on the discussion that can be shipped and stored in a fully collapsed state and expanded to a suitable form once filled with water or another fluid. [0010] It is yet another object of the invention to provide a heavy training bag as in the previous objects that protects the internal liner filled with water or fluid to accommodate the shocks transmitted through the water or fluid without damaging the liner over extended use. [0011] It is a further object of the invention to provide a heavy training bag as in the previous objects that provides the look and feel of a conventional heavy training bag. [0012] It is still a further object of the present invention to provide a heavy training bag as in the last object that can be shipped disassembled but can be conveniently and quickly assembled by an end user. [0013] It is yet a further object of the invention to provide a heavy training bag of the type under discussion that significantly reduces the cost of manufacturing conventional heavy training bags without compromising their characteristics or properties to the end user. BRIEF DESCRIPTION OF THE DRAWINGS [0014] Various further objects, features and advantages of present invention will be more fully appreciated and the invention will be better understood in light of the accompanying figures, in which: [0015] FIG. 1 is a perspective view of a heavy training bag in accordance with the present invention, shown suspended from a support surface and ready for use. [0016] FIG. 2 is a cross-sectional view of the heavy training bag shown in FIG. 1 taken along a longitudinal section line 2-2. [0017] FIG. 3 is a cross-sectional view of the bag shown in FIG. 2, taken along a transverse section along line 3-3. [0018] FIG. 4 is a elevational view of a section of the interior surface of the heavy training bag, as viewed along the region 4-4 in FIG. 3. [0019] FIG. 5 is a perspective view of a section of the heavy training bag shown in FIG. 4. DESCRIPTION OF PREFERRED EMBODIMENT [0020] Referring now specifically to the figures, in which identical or similar parts are designated by the same reference numerals throughout, and first referring to FIG. 1, a liquid-fillable heavy training bag in accordance with the present invention is generally designated by the reference numeral 10. Continue reading... Full patent description for Liquid-fillable heavy training bag Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Liquid-fillable heavy training bag patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. 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