Patent US4473948A successfully refreshed from Google Patents.
US4473948A
Expired / Lapsed
US
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Tire puncturing device
Assignee: Individual
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Filing: 1982-09-13
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Granted: 1984-10-02
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Expires: 2002-09-13
Abstract
Abstract A tire puncturing device includes a plurality of drive pins which are mounted on a base plate. The pins can be forced into an automobile tire in order to puncture the tire and thus prevent the automobile from being driven. The drive pins are normally Teflon coated in order to prevent the tire from sealing onto the pins. The device is intended primarily for law enforcement officers.
Inventors
- 👤 Thomas L. Chadwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:48
CPC Classifications
E; E01; E01F; E01F13/00; E01F13/12; B; B26; B26F; B26F1/00; B26F1/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
A tire puncturing device comprising a base plate having a plurality of equal length drive pins whose axes are formed in a plane perpendicular to the plane of the base plate; said drive pins including a free end which forms a piercing point, said drive pins having a cylindrical base at their other ends whose height is approximately equal to the thickness of said base plate, each of said drive pins cylindrical bases being secured in an aperture formed in the base plate, said drive pin bases having a diameter greater than the diameter of the other portions of said drive pins, said drive pins being coated with polytetrafluoroethylene to prevent sealing of the pins in an automobile tire when punctured.
Claim 2
Dependent Claim
121 words
A tire puncturing device comprising a base plate having a plurality of equal length drive pins whose axes are formed in a plane perpendicular to the plane of the base plate; said drive pins including a free end which forms a piercing point, said drive pins having a cylindrical base at their other ends whose height is approximately equal to the thickness of said base plate, each of said drive pins cylindrical bases being secured in an aperture formed in the base plate, said drive pin bases having a diameter greater than the diameter of the other portions of said drive pins, said drive pins being coated with polytetrafluoroethylene to prevent sealing of the pins in an automobile tire when punctured.
Claim 3
Dependent Claim
164 words
A tire puncturing device comprising a base plate having a plurality of equal length drive pins whose axes are formed in a plane perpendicular to the plane of the base plate; said drive pins including a free end which forms a piercing point, said drive pins having a cylindrical base at their other ends whose height is approximately equal to the thickness of said base plate, each of said drive pins cylindrical bases being secured in an aperture formed in the base plate, said drive pin bases having a diameter greater than the diameter of the other portions of said drive pins, said drive pins being formed of a pair of rows extending along the longitudinal plane of said base plate, said drive pins of one of said rows being offset from the drive pins of the adjacent rows and wherein said non-adjacent surfaces of said base plate are flat for enabling a pair of said puncturing devices to be carried in a pouch.
Claim 4
Dependent Claim
164 words
A tire puncturing device comprising a base plate having a plurality of equal length drive pins whose axes are formed in a plane perpendicular to the plane of the base plate; said drive pins including a free end which forms a piercing point, said drive pins having a cylindrical base at their other ends whose height is approximately equal to the thickness of said base plate, each of said drive pins cylindrical bases being secured in an aperture formed in the base plate, said drive pin bases having a diameter greater than the diameter of the other portions of said drive pins, said drive pins being formed of a pair of rows extending along the longitudinal plane of said base plate, said drive pins of one of said rows being offset from the drive pins of the adjacent rows and wherein said non-adjacent surfaces of said base plate are flat for enabling a pair of said puncturing devices to be carried in a pouch.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |