Chemically active decay attacking liquid administering apparatus and fatigue relieving connection therefor

• US 3,921,297 A
• Filed: 10/15/1974
• Issued: 11/25/1975
• Est. Priority Date: 10/15/1974
• Status: Expired due to Term

• Current Assignee: Jaroslav Vit
• Original Assignee: Jaroslav Vit
• Inventors: Vit, Jaroslav
• Primary Examiner(s): Callaghan, Thomas F.
• Application Number:
  US05/515,091
• Time in Patent Office: 406 Days
• Field of Search: 285/174,281,280,98,276,321 32/22,4R 204/81
• US Class Current: 433/80
• CPC Class Codes: A61C 3/00 Dental tools or instruments implanting tools A61C8/00; tools for fastening artificial teeth A61C13/12; visual inspection devices, e.g. dental mirrors, A61B1/24

Abstract

Apparatus for administering chemically active decay attacking liquid including an applicator and handle therefor, a delivery hose, and a rotary coupling between the delivery hose and handle for relieving fatigue of materials connecting the hose and handle. The rotary coupling includes first and second connecting members, one member (preferably the one connected to the delivery hose) having an elongated tubular portion thereof that extends completely through the opening in the other connecting member and is held in that position by a retaining means. Disposed between cooperating shoulder portions of the connecting members and surrounding the elongated tubular portion is an anti-friction and sealing ring, such as a Teflon ring, and a spring retaining means for securing the ring around the elongated portion. A friction free liquid-tight coupling between two relatively rotatable members is thus provided.

Claims

1. Apparatus for administering chemically active decay attacking liquid to dental caries comprising a. a fluid delivery member adapted to be connected to a source of chemically active decay attacking liquid, b. an applicator, c. an elongated tubular handle connected at one end with said applicator, said handle having exterior surface means for manual engagement by an operator to facilitate maneuverability of said applicator, and interior passage means for delivering fluid from said fluid delivery member to said applicator, and d. means for coupling said tubular handle at an opposite end thereof with said fluid delivery member and for allowing rotary movement of said handle relative to said fluid delivery member without the transmittal of fatiguing torque thereto, said coupling means including (1) a first tubular connecting member connected to said fluid delivery member and having a first shoulder portion disposed substantially perpendicular to the axis of said first tubular connecting member, (2) a second tubular connecting member connected to said tubular handle and having a second shoulder portion disposed substantially parallel to said first shoulder portion, (3) an elongated tubular portion extending from the shoulder portion of said first tubular connecting member, said second connecting member having an opening extending from the shoulder thereof therethrough and receiving said elongated tubular portion for rotation therein in a fixed position wherein a part of said elongated tubular portion extends completely through the opening in said second member, (4) means engaging said part of said elongated tubular portion for retaining said elongated portion in said position without hindering relative rotational movement between said connecting members, and (5) an antifriction and sealing member encircling said elongated tubular portion and disposed between said shouLder portions and operatively engaging both of said shoulder portions when said elongated portion is in said position, said member comprising a ring of anti-friction material, said ring being the only accessory sealing and anti-friction means disposed between said first connecting member and said second connecting member.

2. Apparatus as recited in claim 1 further comprising spring retaining means for retaining said anti-friction and sealing ring encircling said elongated tubular portion.

3. Apparatus as recited in claim 2 wherein said anti-friction and sealing ring has a U-shaped cross-section, the closed bottom of said U-shaped cross-section abutting said shoulder portion having said elongated tubular portion extending therefrom, and the open top of said U-shaped cross-section receiving said spring retaining means.

4. Apparatus as recited in claim 3 wherein said anti-friction and sealing member is formed of Teflon.

5. Apparatus as recited in claim 1 wherein said means engaging said part of said elongated tubular portion includes a spring-clip, and wherein said part of said elongated tubular portion has a groove formed therein to receive said spring-clip.

6. Apparatus as recited in claim 1 wherein said applicator includes a tubular member having a spoon-excavator tip formed at the end thereof remote from the connection to said handle.

7. Apparatus as recited in claim 1 wherein said fluid delivery means includes a flexible hose.

8. Apparatus as recited in claim 2 wherein said second shoulder has a lip extending therearound for positively retaining said spring retaining means.

9. Apparatus as recited in claim 1 wherein said first connecting member and said fluid delivery means and said second connecting member and said handle are respectively connected to each other by the engagement of screw-threaded portions formed respectively thereon.