Valve shaft end float control

• US 4,509,720 A
• Filed: 07/07/1983
• Issued: 04/09/1985
• Est. Priority Date: 07/07/1983
• Status: Expired due to Term

• Current Assignee: General Motors Corporation (General Motors Company)
• Original Assignee: General Motors Corporation (General Motors Company)
• Inventors: Griffin, Michael D., Lamirande, Donald J., Gural, John A.
• Primary Examiner(s): Scott, Samuel
• Assistant Examiner(s): ANDERSON, GERALD A
• Application Number:
  US06/511,534
• Time in Patent Office: 642 Days
• Field of Search: 251/305, 251/308, 251/307, 411/116, 411/119, 411/187, 411/188, 411/189, 411/417, 411/427, 403/97, 403/257, 403/259, 403/261, 403/383, 464/187
• US Class Current: 251/308
• CPC Class Codes: F02M 19/12 External control gear, e.g. having dash-pots dampening means in later stages of multi-stage carburettors F02M11/04
• CPC Class Codes: F16B 2200/406 Clamping parts being collars, bushings or wedges
• CPC Class Codes: Y10T 403/32368 including radial interengaging tongue and slot or serrations

Abstract

A throttle valve shaft projecting from a boss on an internal combustion engine throttle body has a nut which is adjustable for establishing a selected clearance between the nut and the boss to thereby limit end float or axial displacement of the shaft. A lever or other retainer secured to the shaft has an interfering engagement with the nut to prevent rotation of the nut about the shaft and thereby maintain the selected clearance between the nut and the boss.

Claims

1. A valve assembly comprising a valve body defining a fluid flow passage, a valve shaft journalled for rotation in said body and extending across said passage, a valve member in said passage secured to said shaft and rotatable with said shaft to control flow through said passage, said body having an external boss, and wherein said shaft has a threaded end projecting from said boss, a nut is threaded on said end of said shaft, the position of said nut on said shaft being adjustable during assembly for establishing a selected clearance between said nut and said boss to thereby limit end float of said shaft, a retainer is secured to and rotatable with said shaft, and said retainer has an interfering engagement with said nut for preventing rotation of said nut about said shaft and consequent axial movement of said nut along said shaft to thereby maintain said clearance.

2. A valve assembly comprising a valve body defining a fluid flow passage, a valve shaft journalled for rotation in said body and extending across said passage, a valve member in said passage secured to said shaft and rotatable with said shaft to control flow through said passage, and a valve lever secured to and rotatable with said shaft, said body having an external boss, and wherein said shaft has a threaded end projecting from said boss, a nut is threaded on said end of said shaft, the position of said nut on said shaft being adjustable during assembly for establishing a selected clearance between said nut and said boss to thereby limit end float of said shaft, and a retainer is disposed about said shaft between said nut and said lever, said retainer being secured to and rotatable with said shaft and having a splined engagement with said nut for preventing rotation of said nut about said shaft and consequent axial movement of said nut along said shaft to thereby maintain said clearance.