Retraction mechanism for dental units and the like

Details Retraction mechanism for dental units and the like Retraction mechanism for dental units and the like

1980-04-21

1982-10-12

Peshock, Robert

Dentistry

Apparatus

Having storage or nonuse supporting means

A01C 114

Patent

active

043536956

ABSTRACT:
A pneumatically operated piston is used to move an extended utility line back into a dental unit. The unit has a vent valve which permits the free exhaust of air from the unit as the utility line is pulled from the unit. For retraction of the utility line, the application of pneumatic pressure to move the piston also operates to close the vent valve.

REFERENCES:
patent: 3427719 (1969-02-01), Gordon et al.
patent: 3722095 (1973-03-01), Gietschmann

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