FLUID CONDUIT COUPLING

• US 3,574,359 A
• Filed: 07/22/1969
• Issued: 04/13/1971
• Est. Priority Date: 07/22/1969
• Status: Expired due to Term

• Current Assignee: Lee F. Klein
• Original Assignee: Lee F. Klein
• Inventors: Klein, Lee F.
• Application Number:
  US04/843,622
• Time in Patent Office: 630 Days
• US Class Current: 285/86
• CPC Class Codes: F16L 37/144 the securing element being U-shaped
• CPC Class Codes: F16L 55/09 Air conditioning, e.g. de-watering, in pneumatic systems
• CPC Class Codes: Y10S 285/924 Vented

Abstract

A readily detachable coupling for conduits for fluid under pressure embodies a socket and a plug which is inserted into the socket and which is in sealing relation with the socket when fully inserted. The socket has a sleeve threaded to its outer surface which serves to retain two axially spaced sets of detents of horseshoe shape, one set of detents retaining the plug in fully inserted position. To disconnect the system, the sleeve is unscrewed and the first set of detents is removed. This allows the plug to move outwardly to an unsealed position to bleed the system, after which the sleeve is further unscrewed to release the second set of detents and allow disconnection of the coupling.

Claims

1. A fluid conduit coupling comprising, in combination, an outer member defining a receptacle, an inner member slidably received in the receptacle and in sealing relation to the outer member when fully inserted, means defining a shoulder on the inner member, means defining two disengageable positive detent means on the outer member, a first detent means engageable with the shoulder when the inner member is fully inserted to hold the coupling engaged and sealed and a second detent means engageable with the shoulder to retain the inner member within but in nonsealing contact with the outer member to bleed the conduit, and retainer means on the outer member effective to retain both detent means in operative position to engage the shoulder, the retainer means being movable to free sequentially the first detent means and then the second detent means, each detent means including two U-shaped detents spaced circumferentially of the coupling and having legs engageable with the said shoulder, the outer member defining external grooves in which the detents are located and defining external grooves in which the detents are located and defining openings through the outer member for the legs of the detents.

2. A coupling as recited in claim 1 in which the detents are of a spring type and the shoulder has a ramped inner surface so that the coupling can be engaged with the detents in operative position.

3. A coupling as recited in claim 1 in which the retainer means is a sleeve threaded on the outer member.

4. A coupling as recited in claim 1 in which the two said members define between them a restricted passage for bleed of fluid when the shoulder engages the second detent means.