US3586080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screwdriver with handle
Assignee: Stephan Witte GmbH and Co KG
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Filing: 1968-10-28
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Granted: 1971-06-22
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Expires: 1988-10-28
Abstract
Abstract The disclosure is of a screwdriver having a handle for receiving and holding fast a tool shank, in which said handle comprises in combination a rear first portion which is of approximately triangular cross section throughout, a second portion adjoining said rear first portion in direction to said tool shank, said second portion being of round cross section for grasping with the fingers for the purpose of fine rotation when the ball of the hand is pressing on said rear first portion, and a gradual transition between said rear first portion and said second portion.
Inventors
- 👤 Erich Slany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:52
CPC Classifications
B; B25; B25G; B25G1/00; B25G1/10; B25G1/105; Y; Y10; Y10S; Y10S16/00; Y10S16/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
A screwdriver comprising a handle for receiving and holding fast a tool shank, said handle having a first portion for gripping with the ball of the hand during use of the screwdriver for a tight screwing operation and a second portion adjoining said first portion in direction toward said tool shank to be grasped by the fingers during use of the screwdriver for light screwing operation, said first portion extending in axial direction over a major portion of the handle and having in direction transverse to the axial direction a substantially regularly triangular cross Section which is substantially uniform over the whole length of said first portion, and the sides of the triangle of said substantially triangular cross section being slightly convexly curved, said second section being of substantially circular cross section.
Claim 2
Dependent Claim
132 words
A screwdriver comprising a handle for receiving and holding fast a tool shank, said handle having a first portion for gripping with the ball of the hand during use of the screwdriver for a tight screwing operation and a second portion adjoining said first portion in direction toward said tool shank to be grasped by the fingers during use of the screwdriver for light screwing operation, said first portion extending in axial direction over a major portion of the handle and having in direction transverse to the axial direction a substantially regularly triangular cross Section which is substantially uniform over the whole length of said first portion, and the sides of the triangle of said substantially triangular cross section being slightly convexly curved, said second section being of substantially circular cross section.
Claim 3
Dependent Claim
23 words
A screwdriver as defined in claim 1, wherein said first section extends over substantially the rear two-thirds of the length of the handle.
Claim 4
Dependent Claim
35 words
A screwdriver as defined in claim 1, in which said substantially regularly triangular cross section of said first portion increases slightly along the length of said first portion forwardly in direction toward said tool shank.
Claim 5
Dependent Claim
62 words
A screwdriver as defined in claim 1 comprising in said first portion areas each provided with a plurality of shallow grooves extending substantially in the longitudinal direction of said handle and lying closely side by side with a spacing in the order of the magnitude of about 0.2-2 mm. and with depths in the order of the magnitude of about 0.2-1 mm.
Claim 6
Dependent Claim
16 words
A screwdriver as defined in claim 4, in which said grooves lie parallel with one another.
Claim 7
Dependent Claim
19 words
A screwdriver as defined in claim 4, in which said grooves lie slightly obliquely in relation to one another.
Claim 8
Dependent Claim
34 words
A screwdriver as defined in claim 6, in which said grooves are in the form of individually mutually separate groove sections lying one behind the other substantially in the longitudinal direction of said handle.
Claim 9
Dependent Claim
18 words
A screwdriver as defined in claim 6, in which said grooves lie irregularly in relation to one another.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |