Sealed electrical connector and method of using same

• US 4,713,021 A
• Filed: 05/17/1985
• Issued: 12/15/1987
• Est. Priority Date: 05/17/1985
• Status: Expired due to Term

• Current Assignee: AMP Incorporated (Johnson Controls International plc)
• Original Assignee: AMP Incorporated (Johnson Controls International plc)
• Inventors: Kobler, Robert J.
• Primary Examiner(s): Weidenfeld, Gil
• Assistant Examiner(s): Pirlot, David
• Application Number:
  US06/735,416
• Time in Patent Office: 942 Days
• Field of Search: 339/91 R, 339/60 C, 339/60 R, 339/60 M, 339/94 R, 339/94 M, 339/94 C, 339/103 R, 339/103 M, 339/59 R, 339/59 M, 339/61 R, 339/61 M, 339/176 MP , 339/176 MF, 339/196 M
• US Class Current: 439/272
• CPC Class Codes: H01R 13/5205 Sealing means between cable and housing, e.g. grommet H01R13/5221 takes precedence

Abstract

A sealed electrical connector has a housing receiving terminated conductors therein, for mating to a corresponding connector. A camming member is latched to the rear of the housing with bores therethrough through which the conductors extend. Wire seals are disposed between the housing and the camming member around each conductor. A sequential latching provides a first or open position for the camming member which allows for insertion of the terminated conductors through bores of the camming member, through respective wire seals and into respective passageways of the housing wherein the terminals are seated. The camming member is then moved axially forward to a second or closed position which cams against the rear sections of the wire seals and urges and deforms them radially inwardly against the conductors so that a pressure-resistant seal is formed between the conductor, the wire seal, and the camming member. Several types of wire seals are usable with the sealed connector. A latching system for sequential latching of the housing member and camming member has two axially spaced projections on the housing which latch into a slot behind a collar in a first latching and a second latching upon urging the housing and camming members together.

Claims

1. A sealed connector assembly for receiving insertably thereinto and securing therewith electrical conductors having terminals terminated on ends thereof, comprising:

housing means, a rigid camming member secured to a rearward end of said housing means, and a plurality of individual wire seal members secured therebetween, defining a preassembled connector assembly prior to insertion of terminated conductors thereinto, wherein;

said housing means having a plurality of terminal-receiving cavities extending therethrough each to receive a respective terminated electrical conductor securely thereinto;

said plurality of individual wire seal members each associated with a said terminal-receiving cavity and said respective conductor, each said wire seal member being elongated and sleeve-like of relatively incompressible, deformable elastomeric material and having a conductor-receiving aperture extending therethrough for a said respective terminated conductor, each said wire seal member adapted to receive insertably therethrough a said terminated conductor and then initially loosely surround an insulated conductor portion therewithin substantially therealong, each said wire seal member having a forward seal portion disposed and held within a rearward section of a said associated terminal-receiving cavity and at least a rearward seal portion extending rearwardly from said cavity, said wire seal members held by said housing means prior to securing said camming member thereto;

said rigid camming member securable to said housing means in a first fixed position after said wire seal members are disposed within respective said terminal-receiving cavities of said housing means, said camming member exposing said rearward seal portions of said wire seal members for receiving said terminated ends of respective said conductors thereinto, said camming member being movable relatively towards said housing means from said first position to a second position; and

each said wire seal member including a camming surface portion on a radially outward surface thereof at least proximate a rearward end thereof, and said camming member having respective rigid cooperating camming means associated with said camming surface portion of each said wire seal member, all such that when said camming member is in said first position, a said terminated end of each said conductor is insertable into and through an associated said wire seal member and the terminal terminated to said conductor is securable in said associated terminal-receiving cavity, and when said camming member is moved to said second position, said camming surface portion of each said wire seal member is engaged by a said associated rigid cooperating camming means of said camming member and placed under force directed substantially radially inwardly, and the rearward section of each said wire seal member is radially deformed thereby into sealing engagement around an insulated portion of a said respective conductor, whereby said camming member cams the plurality of said wire seal members simultaneously into sealing engagement with respective said conductors.

2. A sealed connector assembly as set forth in claim 1 wherein each said wire seal member sealingly engages said housing means at least after said camming member is moved to said second position.

3. A sealed connector assembly as set forth in claim 1 wherein each said wire seal member is adapted to receive a conductor therethrough having one of several preselected outer diameters.

4. A sealed connector assembly as set forth in claim 1 wherein each said wire seal member comprises an elastomeric sleeve-like body adapted to engage a cooperating stop surface of said housing means when urged axially forwardly by said camming member, and is further adapted to be engaged by a camming means of said camming member into sealing engagement with a said conductor extending therethrough.

5. A sealed connector assembly as set forth in claim 1 wherein said camming member has a transverse section with at least one bore therethrough such that said conductors are insertable therethrough.

6. A sealed connector assembly as set forth in claim 5 wherein said camming member has a bore associated with each said at least one terminal-receiving cavity and a respective said wire seal member associated therewith, and substantially axially aligned therewith such that each said respective conductor is insertable therethrough.

7. A sealed connector assembly as set forth in claim 6 wherein each said wire seal member has a forward conductor-engaging section and a connector-engaging section rearwardly therefrom.

8. A sealed connector assembly as set forth in claim 6 wherein each said bore includes a respective said cooperating camming means engageable with a said camming surface portion on a rearward section of an associated said wire seal member when said camming member is moved from said first position to said second position, to deform said wire seal member into sealing engagement with a respective said conductor therethrough.

9. A sealed connector assembly as set forth in claim 8 wherein said rigid camming member provides strain relief against axial and lateral forces on said conductor after being moved into said second position.

10. A sealed connector assembly as set forth in claim 8 wherein said camming surface portion on said rearward section of each said wire seal member is substantially annular and is engageable by a said associated cooperating camming means of said camming member.

11. A sealed connector assembly as set forth in claim 10 wherein said second position of said camming member is axially forward of said first position thereof.

12. A sealed connector assembly as set forth in claim 11 wherein said camming member is an integral part, said cooperating camming means thereof comprises a substantially annular camming surface of a respective bore and faces forwardly and inwardly with respect to said respective bore, said camming surface portion of said rearward section of a respective said wire seal member is substantially annular and faces rearwardly and outwardly and is associated with a respective said camming surface of said bore, said wire seal member is stopped from axially forward movement along said conductor, and said camming surface of said bore engages said camming surface portion of said wire seal member and deforms said wire seal at least radially inwardly into sealing engagement with said conductor when said camming member is moved axially forwardly from said first position to said second position.

13. A sealed connector assembly as set forth in claim 12 wherein each said wire seal member has a stop shoulder proximate a forward end thereof which engages a cooperating stop surface of said housing means to stop forward axial movement of said wire seal member when said camming member is moved from said first position to said second position.

14. A sealed connector assembly as set forth in claim 12 wherein one of said camming member and said housing means has a first latching projection and a second latching projection and the other of said camming member and said housing means has a cooperating latching slot such that said camming member is in said first position when said first latching projection is in said cooperating latching slot and is in said second position when said second latching projection is in said cooperating latching slot.

15. A sealed connector assembly as set forth in claim 14 wherein said camming member is keyed by keying means to said housing means.

16. A camming member for a sealed connector assembly having a housing member with a plurality of terminal-receiving cavities extending axially therethrough with a wire seal positioned in a rearward section of each said cavity to receive therethrough a terminated conductor associated with said wire seal to be secured in said cavity forwardly of said wire seal, comprising a rigid article including:

a transverse section having an axial profiled bore therethrough corresponding to each said terminal-receiving cavity of said housing member;

a collet section forwardly of said transverse section and mountable on a rearward end of said housing member such that each said axial bore is aligned with an associated housing cavity;

a substantially annular camming surface in each said profiled bore associated with a cooperating portion of a respective said wire seal positioned in the associated housing cavity; and

slot means on said collet section cooperating with corresponding first and second projections on said housing member sequentially latchable within said slot means to position said camming member in a first position and in a second position spaced axially forwardly from said first position, whereby when said camming member is in said first position each said terminated conductor is insertable through a respective said axial bore through an associated said wire seal and into an associated terminal-receiving cavity and securable therein, and when said camming member is moved axially forwardly into said second position each said camming surface engages a said cooperating wire seal portion and cammingly urges it into sealing engagement with said conductor therewithin.

17. A method of sealing and strain relieving an electrical connector having conductors securable therein comprising the steps of:

selecting elastomeric wire seals for respective conductors having conductor-receiving apertures larger than the diameters of the respective conductors at least rearwardly from a forward end of said wire seals and being adapted to receive insertably thereinto and therethrough ends of respective conductors having terminals terminated thereon, and to initially loosely surround insulated portions of the conductors after insertion and substantially therealong;

positioning a forward section of a said wire seal in a rearward section of each of a plurality of terminal-receiving passageways of a connector against respective stop means of said passageways such that at least a rearward section of each said wire seal extends rearwardly from a respective one of said passageways;

securing a rigid camming member in a first position to a rearward end of said connector, said camming member having bores through a transverse section thereof corresponding with said passageways and said wire seals therein and exposing rearward ends of said wire seals, whereby said connector, said camming member and said wire seals comprise a complete preassembled connector assembly prior to insertion of terminated conductors thereinto;

inserting said terminated conductors through respective said bores and wire seals, and into said passageways wherein terminals on said conductors are secured; and

urging said camming member axially forwardly to a second position and into camming engagement with said rearward sections of said wire seals deformingly urging them radially inwardly engagingly and sealingly against respective said conductors extending therethrough, whereby sealing engagement and strain relieving engagement are obtained at least between each said wire seal and a respective said conductor, and between each said wire seal and said camming member.