Ratcheting screwdriver

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5535648
SERIAL NO

08394490

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A ratcheting screwdriver is operable in reverse ratcheting, forward ratcheting and locked non-ratcheting modes. The screwdriver includes a rotatable handle having along an end thereof a substantially cylindrical interior wall defining an annular base surface and an axial bore. The base surface includes two substantially arcuate grooves formed therein which communicate with the bore. An insert is received in the bore and includes longitudinally extending teeth equiangularly spaced around the outer periphery thereof. First and second balls are respectively positioned in the arcuate grooves and urged against the insert by first and second compression springs, respectively. In the locked mode, the first and second balls are wedged against teeth on the insert to prevent ratcheting of the handle relative to a bit regardless of direction of handle rotation. In each of reverse and forward ratcheting modes, a corresponding one of the balls is urged away from its wedged engagement with the teeth on the insert, to provide ratcheting of the bit in the associated direction of handle rotation, and rotation of the bit together with the handle in the opposite direction. In a second related embodiment, a left-right pawl/torsion spring assembly is used in place of the ball/compression spring assembly.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SNAP-ON TECHNOLOGIES, INC.CRYSTAL LAKE, IL196

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Braun, John A Kenilworth, NJ 6 128
Occidentale, Frank Elmwood Park, NJ 3 140

Cited Art Landscape

Patent Info (Count) # Cites Year
 
The Stanley Works (1)
* 4466523 Ratchet mechanism 33 1982
 
Patcore, Incorporated (1)
* 5152197 Toothless ratchet and clutch mechanisms 5 1991
 
WERA WERK HERMANN WERNER GMBH & CO. KG (1)
* RE34680 Screw tool 12 1991
 
SNAP-ON INCORPORATED (1)
* 4777852 Ratcheting screwdriver 66 1986
 
ROBERT SCHRODER GMBH & CO. KG (1)
* 5069091 Screwdriver with pivotal handle 45 1990
 
Rubicon Co., Ltd. (1)
* 4799407 Ratchet screwdriver 13 1987
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (7)
* 5752590 Ratchet tool 5 1996
* 6260446 Locking structure for screwdriver 16 2000
* 6543315 Ratchet structure of screwdriver 14 2002
* 7287448 Reversible high-torque screwdriver 3 2005
* 2006/0048,610 REVERSIBLE HIGH-TORQUE SCREWDRIVER 2 2005
* 7302876 Bi-sectional wrench 7 2007
* 2009/0038,449 Indicator for Torque Limiting Tool 0 2008
 
BLACK & DECKER INC. (2)
D449505 Ratcheting hand held tool 18 2000
6568693 Ratcheting hand held tool 14 2001
 
PHILLIPS SCREW COMPANY (2)
* 6152000 Driver bit and driver 6 1998
6609862 Tool bit 3 2001
 
EASCO HAND TOOLS, INC. (2)
7222557 Ratcheting tool driver 6 2005
* 2007/0062,340 RATCHETING TOOL DRIVER 1 2005
 
APEX BRANDS, INC. (2)
* 7137320 Ratcheting tool driver 5 2003
* 2004/0154,439 Ratcheting tool driver 4 2003
 
GREATBATCH MEDICAL S.A. (1)
7600451 Detachable surgical ratchet 5 2004
 
GREATBATCH LTD. (2)
7926390 Coupling device with configurable actuator 3 2006
* 2006/0248,988 Coupling device with configurable actuator 1 2006
 
ZIMMER SPINE, INC. (2)
* 7604640 Device and system for applying rotary impact 7 2007
* 2008/0308,600 DEVICE AND SYSTEM FOR APPLYING ROTARY IMPACT 10 2007
 
SNAP-ON TOOLS CORPORATION (1)
6260445 Ratcheting composite screwdriver 8 2001
 
SNAP-ON TECHNOLOGIES, INC. (1)
* 5685204 Miniature reversible ratcheting screwdriver 20 1996
 
Alltrade Tools LLC (1)
* 2008/0092,695 Bi-directional ratchet drive 4 2006
 
STANLEY BLACK & DECKER, INC. (1)
8820195 Bit or fastener driver 1 2010
 
TECOMET, INC. (2)
* 5873288 Ratcheting mechanism 9 1997
* 5943755 Ratcheting mechanism and process for making same 17 1998
 
Great Neck Saw Manufacturers, Inc. (1)
6854363 Ratchet driver 6 2004
 
TOLOMATIC, INC. (2)
* 9431868 Manual override device for an electric actuator and method for use 0 2011
* 2012/0019,109 MANUAL OVERRIDE DEVICE FOR AN ELECTRIC ACTUATOR AND METHOD FOR USE 0 2011
 
Bradshaw Medical, Inc. (4)
D580730 Fixed-torque limiting handle for a driver 8 2006
D562665 Ratcheting screwdriver assembly 9 2006
D557584 Handle for a driver for a tool 26 2006
7389700 Variable torque-limiting driver 11 2008
 
Gauthier Biomedical, Inc. (9)
6817458 Ratcheting mechanism 14 2003
7014023 No-play ratchet construction 9 2004
* 6948605 Ratcheting mechanism 8 2004
* 7156216 Ratcheting mechanism 5 2005
7430945 Ratcheting torque wrench 42 2007
* 2007/0209,486 Ratcheting Torque Wrench 0 2007
7806026 Indicator for torque limiting tool 2 2008
7913594 Ratcheting torque wrench 12 2008
8037790 Indicator for torque limiting tool 5 2010
 
PRECIMED S.A. (1)
* 2006/0248,987 Ratchet handle 3 2005
* Cited By Examiner