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 Title: |
US4915669:
Ball with swingable internal weight
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Russell, Gordon K.; Islington, Canada
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| Assignee: |
Pressers International Products Inc., Mississauga, Canada
other patents from PRESSERS INTERNATIONAL PRODUCTS INC. (452165) (approx. 2)
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| Published / Filed: |
1990-04-10
/ 1989-03-17
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| Application Number: |
US1989000325163
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| IPC Code: |
Advanced:
A63B 43/04;
Core:
A63B 43/00;
IPC-7:
A63B 37/00;
A63H 3/06;
A63H 17/00;
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| U.S. Class: |
Current:
446/221;
446/431;
473/610;
Original:
446/221;
446/431;
273/058.BA;
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| Field of Search: |
446/221,220,222,224,325,326,437,431,396
273/58 B,58 BA,58 E,58 F,65 C,65 D,65 EC,65 R,55 A,55 R
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| Priority Number: |
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| Abstract: |
A ball having an outer chamber and a first center of volume contains an inner chamber which is substantially smaller than the outer chamber. The inner chamber has a body portion and a neck portion, the neck portion extending between the body portion and the outer skin of the outer chamber. The neck portion is the only connection between the inner and outer chambers and comprises a flexible tube for permitting the inner chamber to swing back and forth within the outer chamber about the connection. The inner chamber contains a selected amount of a medium much denser than air and when the ball is in use the ball has eccentric and unpredictable flight characteristics.
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| Attorney, Agent or Firm: |
Rogers, Bereskin & Parr ;
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| Primary / Asst. Examiners: |
Hafer, Robert A.; Muir, D. Neal
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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| Parent Case: |
FIELD OF THE INVENTION
This is a continuation of United States patent application Ser. No. 175,979 filed 04/01/88, allowed as amended. Now U.S. Pat. No. 4,842,563.
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| Designated Country: |
AT BE CH DE ES FR GB GR IT LI LU NL SE
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| Family: |
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First Claim:
Show all 8 claims |
I claim:
1. A ball comprising an outer chamber having an outer skin and a first center of volume, an inner chamber, the inner chamber being substantially smaller than the outer chamber and being contained therein, the inner chamber having a second center of volume displaced from said first center of volume, the inner chamber having a body portion and a neck portion, the neck portion extending between the body portion and the outer skin, the neck portion being the only connection between said inner and outer chambers and being flexible for permitting said inner chamber to swing back and forth within said outer chamber about said connection between said inner and outer chambers when said ball is in use, said outer chamber containing air and said inner chamber containing a selected amount of a medium much denser than air, whereby said ball has eccentric and unpredictable flight characteristics.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 9 U.S. patent(s) that reference this one
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