Mechanical guns and projectors – Element – For archery projector
Reexamination Certificate
1999-03-31
2001-09-04
Ricci, John A. (Department: 3712)
Mechanical guns and projectors
Element
For archery projector
Reexamination Certificate
active
06283109
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a stabilizer for an archery bow, a crossbow or similar weapon where vibrations occur in use, and which is formed by housing which is provided with a coupling at one of its ends in order to enable releasable interconnection of the stabilizer and the weapon. A material is received in the interior of the housing which material consists of foam plastic with a damper body contained therein consisting of material, for example lead or other material, which presents a larger density then foam plastic.
2. Description of Related Art
Stabilizers for archery bows are know which are intended to be used for the purpose of competition and hunting, i.e. so called 3-D archery bows. Prior art stabilizers are formed by tubes filled with damping means consisting of oil or other suitable hydraulic fluid or mercury, or consisting of tubes with mill-out patterns. The ability to provide stability varies for those bows used in cooperation with these prior art stabilizers.
U.S. Pat. No. 5,339,793 shows a stabilizer for archery bows and which comprises a hosing with a metal damper rod inside which is embedded in foam plastic material. However, the damper rod which extends along a substantial part of the housing, has during testing not fulfilled expectations of damping efficiency. A contributing reason for this is that the damper rod, because of its weight, compresses the pliant foam plastic material at the bottom of the damper rod. The fact is that the gam plastic material of said known stabilizers is very easy to compress because its density is very small. Also, the longitudinal damper rod is received loosely within the foam plastic material body in the housing, but may be held fixed by means of a clamp ring at its respective end.
BRIEF SUMMARY OF THE INVENTION
The main object of the present invention is therefore in the first hand to solve said problem with simple and effective functioning means, and to provide a stabilizer which serves to dampen vibrations and disturbing movements in all directions.
This object is achieved by means of a stabilizer according to the present invention which principally is characterized in that several balls or similar small damper bodies are contained in and attached to the foam plastic material, which consists of an inertia elastic polyurethane foam plastic with open cells.
Another object of the invention is to provide a stabilizer of the above described kind which also is compact.
This further object of the invention is achieved by means of a stabilizer according to the present invention which principally is characterized in that several balls or similar smaller damper bodies are received as a damper body in a common layer among a common plane between a number of foam plastic bodies received in the housing and being attached to the foam plastic material, which consists of an inertia elastic polyurethane foam plastic with open cells.
REFERENCES:
patent: 3342172 (1967-09-01), Sanders
patent: 3658157 (1972-04-01), Lee
patent: 4706788 (1987-11-01), Inman et al.
patent: 4893606 (1990-01-01), Sisko
patent: 5016602 (1991-05-01), Mizek
patent: 5339793 (1994-08-01), Findley
patent: 5388563 (1995-02-01), Hsu
patent: 5595168 (1997-01-01), Martin
patent: 5595169 (1997-01-01), Brown, Jr.
patent: 5735257 (1998-04-01), Walk
patent: 5975070 (1999-11-01), Sands
patent: 1296201 (1972-11-01), None
Wiseby Dennis
Wiseby Tony
Orum & Roth
Ricci John A.
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