Tamper-proof adjustment screw arrangement for vehicle fuel suppl

Details Tamper-proof adjustment screw arrangement for vehicle fuel suppl Tamper-proof adjustment screw arrangement for vehicle fuel suppl

1986-09-23

1988-01-12

Smith, Leonard E.

Pumps

Combined

123198E, 137382, 261DIG84, 292307B, 411431, 411910, F04B 2100, F02M 5944

Patent

active

047188286

ABSTRACT:
A tamper-proof adjustment screw arrangement for a vehicle fuel supply system for preventing tampering with the setting of an adjustment screw that is situated in a common recess with a component requiring the availability of continued access. In a preferred embodiment, a tamper-proofing shield coacts with the configuration of a portion of a recess having a stepped bottom wall and with a spanner jam nut on the adjustment screw to create a press fit mounting of the shield that makes it exceedingly difficult to pry off the tamper-proofing shield. As an additional safeguard, the spanner nut is designed to require a special tool for loosening thereof.

REFERENCES:
patent: 4209000 (1980-06-01), Ivie
patent: 4246929 (1981-01-01), Wakeman
patent: 4271095 (1981-06-01), Maeda
patent: 4272458 (1981-06-01), Ruth et al .
patent: 4273730 (1981-06-01), Byrnes
patent: 4308220 (1981-12-01), Tateno
patent: 4470769 (1984-09-01), Owens
patent: 4621230 (1986-11-01), Crouch et al.
patent: 4645422 (1987-02-01), Brushaber

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