Patents Assigned to Bradshaw Medical Inc.
  • Patent number: 7806027
    Abstract: A limiter torque wrench and method having a handle and a jaw pivotally connected together along an axis and for pivoting of the handle upon applying a quantifiable torque. A cam and spring-loaded follower are interconnected between the handle and the jaw. A ratchet is connected to the cam for return of the cam to a starting position and with minimal torque and after application of the limited torque. There is a second ratchet engagable with a workpiece and a pawl engages the second ratchet and a pusher engages the pawl offset from the axis for optimum engagement force on the engaged pawl.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: October 5, 2010
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: 7793573
    Abstract: A torque-limiting driver. The driver comprises a handle having a housing, a drive assembly located the housing. The drive assembly comprises a drive, a drive clutch member supported by the drive shaft and secured to the housing, a camming clutch member supported by the drive shaft and interacting with and biased against the drive clutch member. The camming clutch member is coupled to the drive shaft. The housing has a first open end and a second open end. The drive assembly is locked or secured together at the first open end, and the drive assembly is connected to a tool at the second opening.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: September 14, 2010
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: 7740249
    Abstract: A holder for replaceable tools, including a body with an axial opening extending along an axis and for releasably receiving the tools and having two radial openings with balls therein extending into the axial opening. Two ramps are movable on the body and they engage the balls for forcing the balls onto the tool being held in the body and thereby radially and axially stabilize the tool in the body. Two separate springs engage the ramps for movement of the ramps separate from each other.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: June 22, 2010
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: 7516676
    Abstract: A torque limiting and ratcheting driver having a housing and a torque limiting assembly located within the housing. The torque limiting assembly includes a cam member, a plunger, and a roller supported by the plunger that interacts with the cam member. The ratcheting assembly is located interiorly of the cam member.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: April 14, 2009
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: 7467576
    Abstract: A clutch assembly for use with a torque limiting driver. The clutch assembly comprises two relatively roatable clutch plates, a driving plate and a camming plate, that face one another, with a plurality of rolling members housed between the two members. When the rolling members are in the override position, the recesses form individual housings for the rolling members that include a gap located between the rolling members and a respective curvilinear base area of the drive plate. The clutch assembly is secured to a drive shaft by a pin, which is supported by a pair of wheels located on opposing sides of the pin.
    Type: Grant
    Filed: July 16, 2007
    Date of Patent: December 23, 2008
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: 7389700
    Abstract: An adjustable, torque-limiting driver for a tool having a radially extending handle that houses a cam member and a pair of plungers. The plungers are biased against the housing and provide variable resistance for the cam member. The arrangement of the cam member and the plungers reduces the wear on the various parts of the driver and extends the life of the driver.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: June 24, 2008
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: 7343824
    Abstract: An adjustable, torque-limiting driver for a tool having a radially extending handle that houses a cam member and a pair of plungers. The plungers are biased against the housing and provide variable resistance for the cam member. The arrangement of the cam member and the plungers reduces the wear on the various parts of the driver and extends the life of the driver.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: March 18, 2008
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: 7334509
    Abstract: A method for assembling a torque-limiting driver, and the resulting drive. The method comprises the steps of providing a handle having a housing, drive assembly, and a testing assembly. The drive assembly is assembled, inserted into the testing assembly and calibrated. The drive assembly is then removed and inserted into the housing of the handle and secured to the handle.
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: February 26, 2008
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: D543433
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: May 29, 2007
    Assignee: Bradshaw Medical Inc.
    Inventor: Hua Gao
  • Patent number: D557584
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: December 18, 2007
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: D562665
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: February 26, 2008
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: D566271
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: April 8, 2008
    Assignee: Bradshaw Medical, Inc.
    Inventors: Hua Gao, Joseph A. Post
  • Patent number: D580730
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: November 18, 2008
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: D582811
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: December 16, 2008
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: D596293
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: July 14, 2009
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao
  • Patent number: D604584
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: November 24, 2009
    Assignee: Bradshaw Medical, Inc.
    Inventor: Hua Gao