Patent US4643604A successfully refreshed from Google Patents.
US4643604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic pen holder
Assignee: Individual
•
Filing: 1985-05-16
•
Granted: 1987-02-17
•
Expires: 2005-05-16
Abstract
Abstract Magnetic holder device for pens and the like. The device comprises a base provided with a cavity for introducing the front or writing end of a pen; a first annular-shaped permanent magnet is arranged in the base member around the aforesaid cavity, and a second permanent magnet on the pen is situated at a short distance from the tip end of the pen and the annular magnet; the magnetic polarities of the second magnet are orientated in an opposite direction to the polarities of the annular magnet so that the two magnetic fields interact to draw the pen towards the bottom of the base and to laterally support it in an upright position.
Inventors
- 👤 Bertin Enrico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:53
CPC Classifications
B; B43; B43M; B43M99/00; B43M99/001; B43M99/002; B43M99/003; B43K; B43K29/00; Y; Y10; Y10S; Y10S206/00; Y10S206/818; Y10S211/00; Y10S211/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
213 words
Magnetic supporting device for pens and the like, characterized by the fact that it comprises a pen and a base element, said base element being provided with a cavity for receiving the front end of the pen; a first annular-shaped permanent magnet situated in the base element around and coaxially to the aforesaid cavity, said first magnet having north and south poles for providing a first magnetic field with flux lines; and a second permanent magnet situated close to the front end of the pen, said second magnet having north and south poles for providing a second magnetic field with flux lines; the second magnet having its magnetic polarities oriented in the opposite direction to the polarities of the annular magnet in the supporting base; said pen having a rest position which it occupies when it is supported on said base element; said first and second magnets being located where the flux lines of their magnetic fields interact when the pen is in its rest position to exert an axial force of attraction and a radial force of repulsion, said axial force of attraction having a direction which forces the pen axially against the base member, and said radial force of repulsion having a direction which holds the pen in its rest position.
Claim 2
Dependent Claim
213 words
Magnetic supporting device for pens and the like, characterized by the fact that it comprises a pen and a base element, said base element being provided with a cavity for receiving the front end of the pen; a first annular-shaped permanent magnet situated in the base element around and coaxially to the aforesaid cavity, said first magnet having north and south poles for providing a first magnetic field with flux lines; and a second permanent magnet situated close to the front end of the pen, said second magnet having north and south poles for providing a second magnetic field with flux lines; the second magnet having its magnetic polarities oriented in the opposite direction to the polarities of the annular magnet in the supporting base; said pen having a rest position which it occupies when it is supported on said base element; said first and second magnets being located where the flux lines of their magnetic fields interact when the pen is in its rest position to exert an axial force of attraction and a radial force of repulsion, said axial force of attraction having a direction which forces the pen axially against the base member, and said radial force of repulsion having a direction which holds the pen in its rest position.
Claim 3
Dependent Claim
39 words
Device as claimed in claim 1, characterized by the fact that the second magnet lies above and at a short distance from the annular magnet when the tip of the pen rests in the cavity of the supporting base.
Claim 4
Dependent Claim
29 words
Device as claimed in claim 1, characterized by the fact that the magnet in the pen has a smaller external diameter than the internal diameter of the annular magnet.
Claim 5
Dependent Claim
31 words
Device as claimed in claim 3, characterized by the fact that the magnet in the pen has an external diameter equal to approximately half the internal diameter of the annular magnet.
Claim 6
Dependent Claim
39 words
Device as claimed in claim 1, characterized by the fact that the ratio between the internal diameter of the annular magnet and the distance existing between the opposing faces of the two magnets ranges from 2.5 to 3.5 approximately.
Claim 7
Dependent Claim
32 words
Device as claimed in claim 1, characterized by the fact that the cavity for introducing the pen, in the supporting base, is provided on the bottom with a cone-shaped surface converging downwards.
Claim 8
Dependent Claim
38 words
Device as claimed in claim 1, characterized by the fact that the central cavity in the supporting base defines a rest point for supporting the writing tip of the pen, situated on a plane below the annular magnet.
References Cited (Backward Citations)
US2693788A
Cited
FR1197465A
Cited
GB961725A
Cited
US3139865A
Cited
US3196566A
Cited
US3269528A
Cited
FR1539160A
Cited
US3785739A
Cited
US4168129A
Cited
US4451811A
Cited
US4414523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |