Spring Making Patents (Class 29/896.9)
For vehicle or clutch (Class 29/896.91)
For human comfort (Class 29/896.92)
Resilient shock or vibration absorber utility (Class 29/896.93)
  • Valve spring
    Patent number: 6371464
    Abstract: A method of making a spring are described. The spring is made by etching or cutting at least one spiral arm in a flat substrate leaving residual material around the arm. The intermediate residual material is either pushed or lifted to form a conical spring.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: April 16, 2002
    Assignee: Medtronic, Inc.
    Inventors: Leonard Porche, William Jeff Bertrand, Mitchell Solis
  • Solid girdle hoop for an air spring and method of assembly
    Patent number: 6361028
    Abstract: A fluid device such as an air spring includes a pair of parallel spaced end members and an elastomeric sleeve interposed therebetween to define a fluid pressure chamber therein. A girdle hoop is formed of cold rolled solid steel in a toroidal configuration and is molded into the elastomeric sleeve parallel and preferably spaced equidistant from the end plates.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: March 26, 2002
    Assignee: Bridgestone/Firestone, Inc.
    Inventor: Randall R. Hubbell
  • Method for improved split ring assembly
    Patent number: 6293015
    Abstract: A split ring assembly method includes rotating a drive spindle within the bore of a cylindrical housing, the spindle having a drive pin adapted to engage the gap in one face of the split ring positioned axially on one end of the spindle to rotate the ring. An opening wedge is biased into engagement with the opposite face of the split ring and has an edge positioned to enter the other ring gap in response to ring rotation to cause the ring to progressively open along its split.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: September 25, 2001
    Assignee: Worth Manufacturing Company
    Inventor: Eugene G. Piotrowski