Dental apparatus with instrument holder

Details Dental apparatus with instrument holder Dental apparatus with instrument holder

1977-10-17

1979-05-01

Mancene, Louis G.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242107, 13735519, 137, A61C 1902

Patent

active

041516486

ABSTRACT:
A dental apparatus retracts supply hoses connected to associated dental instruments. A coil spring is used within a housing. The hose is interposed between the windings of the spring. When the hose is extended, the radius of the coil contracts causing control switches to be activated. A ratchet engages dogs on the spring preventing unwanted retraction. Upon release of the ratchet, the coil spring expands drawing the hose into the housing.

REFERENCES:
patent: 840200 (1907-01-01), Craft
patent: 1102164 (1914-06-01), Parker
patent: 1491739 (1924-04-01), Russell
patent: 1649251 (1927-11-01), Pieper
patent: 2261325 (1941-11-01), Angell
patent: 3705962 (1972-12-01), Banister

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