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US3884282A Expired / Lapsed US ⏱️ 0.0 years remaining

Screwdriver with integral magnetic screw starter

Assignee: Individual
•
Filing: 1974-04-29
•
Granted: 1975-05-20
•
Expires: 1994-04-29
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Abstract

Abstract A screwdriver having an integral magnetic screw starter to accommodate the same size and type of screws as the cooperative screwdriver head. The driver head of the magnetic screw starter matches the associated driver head of the screwdriver size and type. The magnetic screw starter comprises a high magnetic strength permanent magnet for securely holding the screw to be started. In one embodiment the magnetic screw starter is constructed with a magnetic starterhead having an area comparable in size to the screw to be started, and a slightly raised portion for engaging the slot in the head of the screw to be started. The magnetic screw starter is recessed in the screwdriver handle for protection and for limiting the size of screw which it can accommodate. The disclosed construction provides a magnetic screw starter for securely holding selected size and types of magnetizable fasteners. The teaching of this invention can be applied to screwdrivers having various type of heads such as clutch, Phillips, socket, hex, or the like. The recess in the screwdriver handle and the diameter of the permanent magnet can provide additional help for supporting the screw to be started.

Inventors

  • 👤 Stephen Stanley Dobrosielski

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 12:41
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/02; B25B23/08; B25B23/12

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 113 words
A screwdriver with integral, magnetic screw starter comprising: an elongated handle; a shank formed of a first material attached to and extending from one end of said elongated handle; a first driver head formed at the free end of said shank; an elongated magnetic screw starter, longitudinally aligned with said shank, formed of a second material having superior magnetizable properties and attached to the other end of said elongated handle opposite said shank; and, a second driver head formed at the exposed end of said magnetic screw starter and being constructed for use in cooperation with said first driver by only accommodating the same size and type of screw as said first driver.
Claim 2
Dependent Claim 113 words
A screwdriver with integral, magnetic screw starter comprising: an elongated handle; a shank formed of a first material attached to and extending from one end of said elongated handle; a first driver head formed at the free end of said shank; an elongated magnetic screw starter, longitudinally aligned with said shank, formed of a second material having superior magnetizable properties and attached to the other end of said elongated handle opposite said shank; and, a second driver head formed at the exposed end of said magnetic screw starter and being constructed for use in cooperation with said first driver by only accommodating the same size and type of screw as said first driver.
Claim 3
Dependent Claim 46 words
A screwdriver as claimed in claim 1, wherein: said elongated handle is formed from a non-metallic material and has an opening formed therein; and, said magnetic screw starter comprises an elongated unitary body portion recessed and permanently secured in the opening formed in said elongated handle.
Claim 4
Dependent Claim 72 words
A screwdriver as claimed in claim 2, wherein: said second driver head is formed at the exposed end of said elongated body portion of said magnetic screw starter and is recessed and does not extend beyond the end of said elongated handle; and, said second driver head extends from said magnetic screw starter a length less than the depth of the recess in the screw head of the screw to be started.
Claim 5
Dependent Claim 43 words
A screwdriver as claimed in claim 3, wherein: said elongated handle has an opening formed therein in which said magentic screw starter is recessed, of a size and shape to only accommodate the fasteners which said first driver head is designed to handle.
Claim 6
Dependent Claim 28 words
A screwdriver a claimed in claim 3, wherein: said elongated magnetic screw starter is cylindrical shaped with a diameter equal to the width of said second driver. Pg,12
Claim 7
Dependent Claim 64 words
A screwdriver as claimed in claim 1, wherein: said magnetic screw starter comprises a unitary magnetic member; said second driver extends from a flat planar surface formed at the exposed end of said magnetic screw starter; and said second driver being of a small length so that the head of the screw to be started can contact the flat planar surface which is magnetized.
Claim 8
Dependent Claim 125 words
A screwdriver as claimed in claim 6, wherein: said magnetic screw starter comprises a unitary magnetic member which is recessed and permanently secured in said elongated handle; a counter bore is formed around the exposed end of said magnetic screw starter to limit the size and type of screw head which can be accommodated by said magnetic screw starter to conform to the size and type of screw which said first driver is formed to handle; said counter bore is constructed to contact the head of the screw to be retained when the screw to be started is held by said magnetic screw starter in contact with said flat planar surface of said magnetic screw starter; and, said handle is formed from a nonmetallic material.

References Cited (Backward Citations)

US2260055A Cited
US2271887A Cited
US2794462A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-05-19 1978-11-18 1979-05-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-05-19 1982-11-18 1983-05-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-05-19 1986-11-18 1987-05-20 $7700.00 Window Closed / Lapsed

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