Patent US870806A successfully refreshed from Google Patents.
US5076371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for use in a hand power device
Assignee: Robert Bosch GmbH
•
Filing: 1989-07-19
•
Granted: 1991-12-31
•
Expires: 2009-07-19
Abstract
Abstract A tool for use in a hand power tool has a tool shank to be received in the hand power tool and two diametrically opposite recesses formed in the tool shank for receiving locking bodies of the power tool, and at least three rotary driving grooves open at a rear end surface of the tool shank and located on both sides of said longitudinal plane passing through the two recesses, and symmetrically relative to a plane of symmetry that extends transverse to the longitudinal plane for receiving strip-shaped rotary drivers of the hand power tool. The at least three rotary driving grooves are distributed along a circumference of the tool shank in such a manner that two rotary driving grooves are never located diametrically opposite to each other. The sum of cross-sections of rotary drive grooves located on one side of the longitudinal plane is substantially equal to a sum of cross-sections of rotary drive grooves located on another side of the longitudinal plane.
Inventors
- 👤 Josef Obermeier
- 👤 Gerhard Rumpp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:18
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/08; B25D17/084; B25D17/088; B25D2217/00; B25D2217/003; B25D2217/0034; B25D2217/0038; B25D2217/0049; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042; Y10T279/17068; Y10T279/17666; Y10T279/17692; Y10T279/17743; Y10T279/17752; Y10T408/00; Y10T408/89; Y10T408/907
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
197 words
A hand power tool assembly, comprising a housing; a tool received in said housing; two locking bodies for retaining said tool in said housing; and strip-shaped rotary drivers for driving said tool; said tool comprising a tool shank received in said housing, two diametrically opposite recesses formed in said tool shank for receiving said locking bodies, said two diametrically opposite recesses being closed at opposite axial ends thereof, a longitudinal plane passing through said two diametrically opposite recesses, a plane of symmetry extending transverse to said longitudinal plane, and at least three rotary driving grooves open at a rear end surface of said tool shank and located on both sides of said longitudinal plane symmetrically relative to said plane of symmetry for receiving said strip-shaped rotary drivers, said at least three rotary driving grooves being distributed along a circumference of said tool shank in such a manner that two rotary driving grooves are never located diametrically opposite to each other, and a sum of cross-sections of rotary drive grooves located on one side of said longitudinal plane being substantially equal to a sum of cross-sections of rotary drive grooves located on another side of said longitudinal plane.
Claim 2
Dependent Claim
197 words
A hand power tool assembly, comprising a housing; a tool received in said housing; two locking bodies for retaining said tool in said housing; and strip-shaped rotary drivers for driving said tool; said tool comprising a tool shank received in said housing, two diametrically opposite recesses formed in said tool shank for receiving said locking bodies, said two diametrically opposite recesses being closed at opposite axial ends thereof, a longitudinal plane passing through said two diametrically opposite recesses, a plane of symmetry extending transverse to said longitudinal plane, and at least three rotary driving grooves open at a rear end surface of said tool shank and located on both sides of said longitudinal plane symmetrically relative to said plane of symmetry for receiving said strip-shaped rotary drivers, said at least three rotary driving grooves being distributed along a circumference of said tool shank in such a manner that two rotary driving grooves are never located diametrically opposite to each other, and a sum of cross-sections of rotary drive grooves located on one side of said longitudinal plane being substantially equal to a sum of cross-sections of rotary drive grooves located on another side of said longitudinal plane.
Claim 3
Dependent Claim
184 words
A tool for use in a hand power tool, comprising a tool shank to be received in the hand power tool; two diametrically opposite recesses formed in said tool shank for receiving locking bodies of the hand power tool, said two diametrically opposite recesses being closed at opposite axial ends thereof; a longitudinal plane passing through said two diametrically opposite recesses; a plane of symmetry extending transverse to said longitudinal plane; and at least three rotary driving grooves open at a rear end surface of said tool shank and located on both sides of said longitudinal plane symmetrically relative to said plane of symmetry for receiving strip-shaped rotary drivers of the hand power tool, said at least three rotary driving grooves being distributed along a circumference of said tool shank in such a manner that two rotary driving grooves are never located diametrically opposite to each other, and a sum of cross-sections of rotary drive grooves located on one side of said longitudinal plane being substantially equal to a sum of cross-sections of rotary drive grooves located on another side of said longitudinal plane.
Claim 4
Dependent Claim
184 words
A tool for use in a hand power tool, comprising a tool shank to be received in the hand power tool; two diametrically opposite recesses formed in said tool shank for receiving locking bodies of the hand power tool, said two diametrically opposite recesses being closed at opposite axial ends thereof; a longitudinal plane passing through said two diametrically opposite recesses; a plane of symmetry extending transverse to said longitudinal plane; and at least three rotary driving grooves open at a rear end surface of said tool shank and located on both sides of said longitudinal plane symmetrically relative to said plane of symmetry for receiving strip-shaped rotary drivers of the hand power tool, said at least three rotary driving grooves being distributed along a circumference of said tool shank in such a manner that two rotary driving grooves are never located diametrically opposite to each other, and a sum of cross-sections of rotary drive grooves located on one side of said longitudinal plane being substantially equal to a sum of cross-sections of rotary drive grooves located on another side of said longitudinal plane.
Claim 5
Dependent Claim
40 words
A tool as set forth in claim 2, wherein a number of rotary driving grooves located on one side of said longitudinal plane is greater than a number of rotary driving grooves located on another side of said longitudinal plane.
Claim 6
Dependent Claim
17 words
A tool as set forth in claim 2, wherein said rotary driving grooves have the same length.
Claim 7
Dependent Claim
42 words
A tool as set forth in claim 2, further comprising a center web extending between two adjacent rotary drive grooves and intersected by said plane of symmetry, said center web being arranged at an angle of 0°-15° to said plane of symmetry.
References Cited (Backward Citations)
DE2405938A1
Cited
FR2282323A1
Cited
FR2331410A1
Cited
US4107949A
Cited
US4131165A
Cited
GB2096045A
Cited
EP0071821A2
Cited
US4512692A
Cited
DE3716915A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |