Patent US4364564A successfully refreshed from Google Patents.
US4364564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorber for tennis players
Assignee: Individual
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Filing: 1979-12-10
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Granted: 1982-12-21
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Expires: 1999-12-10
Abstract
Abstract There is disclosed a shock absorber for reducing the physiological effects on the arm and shoulder as normally experienced in tennis, racquetball or the like. The absorber includes a hollow housing in which is disposed a predetermined amount of liquid of predetermined density and means for securing the liquid filled housing to the player's arm. The preferred embodiment calls for liquid mercury disposed in the hollow portion of the housing, the mercury absorbing the vibrational effects resulting from the contacting of the ball with the racquet to thus reduce or eliminate the possible adverse effects on portions of the arm, such as the elbow or the shoulder.
Inventors
- 👤 David Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:41
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A shock absorber for reducing the physiological effects on the arm or shoulder associated with the contact of a ball or the like with an instrument held by the hand, comprising: (a) a hollow housing; (b) approximately 0.13 cubic inches of liquid mercury disposed in the hollow portion of said housing, where the volume of said hollow portion is approximately 0.39 inches; and (c) means of securing the housing to the player's arm.
Claim 2
Dependent Claim
73 words
A shock absorber for reducing the physiological effects on the arm or shoulder associated with the contact of a ball or the like with an instrument held by the hand, comprising: (a) a hollow housing; (b) approximately 0.13 cubic inches of liquid mercury disposed in the hollow portion of said housing, where the volume of said hollow portion is approximately 0.39 inches; and (c) means of securing the housing to the player's arm.
Claim 3
Dependent Claim
73 words
A shock absorber for reducing the physiological effects on the arm or shoulder associated with contact of a ball or the like with a playing racquet held by the hand comprising: (a) a hollow housing; (b) approximately 0.13 cubic inches of liquid mercury disposed in the hollow portion of said housing, where the volume of said hollow portion is approximately 0.39 inches and (c) means for securing the housing to the player's wrist.
Claim 4
Dependent Claim
73 words
A shock absorber for reducing the physiological effects on the arm or shoulder associated with contact of a ball or the like with a playing racquet held by the hand comprising: (a) a hollow housing; (b) approximately 0.13 cubic inches of liquid mercury disposed in the hollow portion of said housing, where the volume of said hollow portion is approximately 0.39 inches and (c) means for securing the housing to the player's wrist.
Claim 5
Dependent Claim
24 words
The device claimed in either claim 1 or claim 2 wherein the means for holding the housing to the arm is a valcro strap.
Claim 6
Dependent Claim
40 words
The device claimed in either claim 1 or claim 2 wherein the inside surface of the hollow portion of said housing is contoured so as to direct any liquid displaced by vibration back into the common reservoir of such liquid.
Claim 7
Dependent Claim
22 words
The device claimed in either claim 1 or claim 2 wherein the hollow portion of said housing has a spherically-shaped, inside surface.
Claim 8
Dependent Claim
17 words
The device claimed in either claim 1 or claim 2 wherein the housing is molded from plastic.
Claim 9
Dependent Claim
47 words
The device claimed in either claim 1 or claim 2 wherein the housing is molded from plastic in one piece, said one piece, plastic housing after molding having an opening for filling thereof with said liquid, said opening capable of sealing after said liquid has been inserted.
Claim 10
Dependent Claim
30 words
The device claimed in either claim 1 or claim 2 wherein the housing is molded from non-brittle plastic such that it will not fracture when submitted to normal intended usage.
References Cited (Backward Citations)
US3269729A
Cited
US3342172A
Cited
US3383772A
Cited
US3490766A
Cited
US3490768A
Cited
US3528664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |