Most fit exercise sledge hammer with head molded to and through handle

Abstract

A hammer with an elongate handle having a longitudinal axis, a proximal end and a distal end; a protrusion mounted at the distal end of the handle having a pin and a notch therethrough oriented along a transverse axis relative to the longitudinal axis and a flexible generally geometrically uniform mass affixed to the handle at the distal end thereof. The mass is molded onto the distal end of the handle whereby at least part of the mass extends through and fully occupies a channel in the handle and cooperates with the pin to secure the mass to the handle.

Claims

1. A sledge hammer comprising: an elongate handle having a longitudinal axis, a proximal end, and a distal end with a channel therethrough oriented along a transverse axis relative to said longitudinal axis; a protrusion mounted at said distal end of said handle having a pin therethrough oriented along said transverse axis relative to said longitudinal axis and a flexible generally geometrically uniform mass affixed to said handle at said distal end thereof, said mass being molded onto said distal end whereby at least part of the mass extends entirely through and fully occupies the channel such that the mass in the channel couples mass disposed on a first side of said handle, relative to said longitudinal axis, to mass disposed on a second side of said handle, relative to said longitudinal axis, diametrically opposed to said mass on said first side of said handle and thereby cooperates with the pin to secure the mass to the handle.

2. The sledge hammer of claim 1 wherein said mass is a ball.

3. The sledge hammer of claim 2 wherein said ball is round.

4. The sledge hammer of claim 2 wherein said ball is elastic.

5. The sledge hammer of claim 2 wherein said ball is urethane.

6. The sledge hammer of claim 1 wherein said protrusion is fiberglass.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a side view of an illustrative embodiment of the sledge hammer of the present invention.

(2) FIG. 2 is a simplified side view of an illustrative embodiment of an electronic striking target in accordance with an alternative embodiment of the present invention.

(3) FIG. 3 is a sectional front view of the hammer depicted in FIG. 1.

(4) FIG. 4 is a magnified view of the distal end of the handle of the hammer depicted in FIG. 3.

DESCRIPTION OF THE INVENTION

(5) Illustrative embodiments and exemplary applications will now be described with reference to the accompanying drawings to disclose the advantageous teachings of the present invention.

(6) While the present invention is described herein with reference to illustrative embodiments for particular applications, it should be understood that the invention is not limited thereto. Those having ordinary skill in the art and access to the teachings provided herein will recognize additional modifications, applications, and embodiments within the scope thereof and additional fields in which the present invention would be of significant utility.

(7) FIG. 1 is a frontal view of an illustrative embodiment of the sledge hammer of the present invention. The inventive hammer 10 includes an elongate handle 12 having a longitudinal axis, a transverse axis, a proximal end and a distal end. A flexible generally geometrically uniform mass 14 is affixed to the handle 12 at the distal end thereof. In the best mode, the handle 12 is fiberglass. However, wood, plastic, metal and other suitably stiff materials may be suitable. In any case, in the illustrative embodiment, the handle 12 is approximately three (3) feet (less than one (1) meter) in length and approximately 1.5 inches in diameter. A grip 13 is included at the proximal end of the handle 12. The grip 13 may be implemented with grooves cut into the handle or with tape wrapped around the handle 12.

(8) In the best mode, the mass 14 is a ball which may be perfectly round or have one or more flat surfaces. The ball 14 should have some dampening properties and may be elastic as well. Urethane would be an ideal material for the construction of the ball however the present invention is not limited thereto. Other materials, such as rubber, might be used without departing from the scope of the present invention.

(9) FIG. 2 is a sectional side view of the hammer depicted in FIG. 1.

(10) FIG. 3 is a sectional front view of the hammer depicted in FIG. 1.

(11) FIG. 4 is a magnified view of the distal end of the handle of the hammer depicted in FIG. 3.

(12) As shown in FIG. 2, in the illustrative embodiment, the ball 14 is secured to the handle with a protrusion 16 mounted at the distal end 20 of the handle 12. The protrusion 16 is an extension from the handle 12 and, in the best mode, is integral therewith.

(13) As shown in FIGS. 2-4, the protrusion 16 has a pin 18 extending therethrough. The pin 18 and a notch 26 are oriented along a transverse axis relative to the longitudinal axis of the handle 12. The pin 18 may be steel, aluminum, plastic or other suitable material. The pin 18 extends into the ball 14.

(14) An open channel 22 extends through the distal end of the handle 20. In the best mode, the ball 14 is molded onto the distal end 20 of the handle 12 and extends entirely through and fully occupies the open channel 22 through the handle 12. This interlocks the ball 14 to the handle 12 and, in conjunction with the pin 18, serves to secure the ball 14 to the handle 12.

(15) The distal end 20 of the handle 12 may be tapered as shown in FIG. 4. An optional hang hole 28 is included in the handle 12.

(16) In the illustrative embodiment, the handle 12 is cylindrical and approximately 32.5 inches in length, to the mass or ball 14, 1.278 inches in width, 1.125 inches in depth and has a urethane grip 13 covering along approximately 15.5 inches thereof. The protrusion 16 is a rectangular cylinder 1.389 inches in length, 1 inch in width and 0.6 inches in depth. The pin 18 is a rod 2.722 inches in length and 0.28 inches in diameter. The notch 26 is shown as an inverted trapezoid. However those of ordinary skill in the art will appreciate that the present invention is not limited thereto. The notch is approximately 0.25 inches in height, 0.75 inches in width and 0.25 inches from the end of the protrusion 16. The ball 14 is approximately seven (7) inches in diameter and weighs 6-15 pounds.

(17) Core Hammer Manufacturing Procedure

(18) In the best mode, the core hammer ball 10 is manufactured using a hot cast polyurethane resin and an open mold casting method. A polyurethane prepolymer and curative blend is used to achieve a proper low rebound physical characteristics required to safely mimic a sledge hammer/tire workout without the tire, while minimizing the impact transfer through the handle to the user's body. To achieve this, a polypropylene glycol based TDI terminated polyether prepolymer is combined with an amine blend diol curative and a polyol based pigment at proper ratios and temperatures using a meter/mix dispensing machine. The meter/mix machine should allow an air free mixture of the three components to be dispensed into the mold at a required casting temperature to produce the most structurally sound hammer possible.

(19) Before casting, the core hammer handle and hammer mold should be preheated to 212 to 230 degrees Fahrenheit in an industrial recirculating oven. The meter/mix machine vacuum degasses and heats the polyurethane prepolymer to approximately 180 degrees F. and combines it with the curative and pigment. The operator should then dispense the polyurethane mixture into the preheated hammer mold and place the filled mold into an oven for an initial cure. Once the polyurethane has set, approximately 45 minutes, the molded hammer should be removed from the mold and placed in a recirculating curing oven at 212 degrees F. for 12 to 16 hours. This completes the required post-cure needed to achieve the optimal physical properties of the polyurethane. After post-curing, the molded hammer is removed from the oven and allowed to cool to room temperature. An additional 72 hours at room temperature is required for the final rebound characteristics to be achieved.

(20) Thus, the present invention has been described herein with reference to a particular embodiment for a particular application. Those having ordinary skill in the art and access to the present teachings will recognize additional modifications, applications and embodiments within the scope thereof.

(21) It is therefore intended by the appended claims to cover any and all such applications, modifications and embodiments within the scope of the present invention.

(22) Accordingly,