Patent US3590895A successfully refreshed from Google Patents.
US3590895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Offset screwdriver with interchangeable heads
Assignee: United States Department of the Air Force
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Filing: 1969-03-18
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Granted: 1971-07-06
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Expires: 1989-03-18
Abstract
Abstract A flat bar having an extended flat surface is recessed adjacent one of its ends to receive any one of a plurality of screwdriver heads of complementary configuration. The configuration is preferably a regular hexagon having vertical walls. Some of the walls of the recess are provided with springs which are adapted to mesh with recesses present in all of the walls of each head so that each head is capable of a multiplicity of angular positions. Each head is provided with a differently designed screwdriver tip.
Inventors
- 👤 Theodore E Wirtanen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:09
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/16; B25B15/00; B25B15/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
In an offset screwdriver, a handle comprising a bar having an extended flat surface, a recess adjacent one end of said bar, said recess being of regular polygonal configuration, walls in said recess in perpendicular relationship to the flat surface of said bar, a spring member located in at least one of said walls for exerting pressure on a head element placed therein to maintain said head element firmly seated within said recess, a head for attachment to said bar, said head being of a configuration complementary to said recess and insertable therein in a plurality of angular positions, said head having a flat surface which presents a continuation of the flat surface of said bar, said head having a screwdriver tip extending outwardly therefrom.
Claim 2
Dependent Claim
125 words
In an offset screwdriver, a handle comprising a bar having an extended flat surface, a recess adjacent one end of said bar, said recess being of regular polygonal configuration, walls in said recess in perpendicular relationship to the flat surface of said bar, a spring member located in at least one of said walls for exerting pressure on a head element placed therein to maintain said head element firmly seated within said recess, a head for attachment to said bar, said head being of a configuration complementary to said recess and insertable therein in a plurality of angular positions, said head having a flat surface which presents a continuation of the flat surface of said bar, said head having a screwdriver tip extending outwardly therefrom.
Claim 3
Dependent Claim
23 words
An offset screwdriver as claimed in claim 1, wherein said regular polygonal configuration of said recess and said head is a regular hexagon.
References Cited (Backward Citations)
US398986A
Cited
US2696859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |