Tube coupling for shock absorbers

Claim 1

A COUPLING COMPRISING AN ELONGATED HOLDER MEMBER HAVING A BORE THERETHROUGH INCLUDING A FIRST THROUGH BORE AND A COUNTERBORE IN ONE END PORTION THEREOF DEFINING AN ANNULAR SHOULDER FACING IN THE DIRECTION OF SAID ONE END, SAID COUNTERBORE HAVING A FIRST SMOOTH PORTION ADJACENT SAID ANNULAR SHOULDER, A THREADED PORTION ADJACENT SAID SMOOTH PORTION AND AN ENLARGED SMOOTH PORTION BETWEEN THE THREADED PORTION AND SAID ONE END, A LENGTH OF FLEXIBLE PLASTIC TUBING OF A SIZE TO SLIDABLY ENGAGE WITHIN SAID FIRST THROUGH BORE, SAID FIRST THROUGH BORE BEING OF GREATER LENGTH THAN THE DIAMETER OF SAID TUBING, A SMOOTH BORE COLLAR RIGIDLY SECURED ABOUT SAID PLASTIC TUBING AT A POSITION SPACER INWARDLY FROM ONE END THEREOF AND BEING OF A SIZE TO BE RECEIVED WITHIN SAID COUNTERBORE IN ENGAGEMENT WITH SAID ANNULAR SHOULDER, A RIGID NIPPLE MEMBER HAVING AN INTERIOR PERIPHERY OF A SIZE TO RECEIVE THE ONE END OF SAID PLASTIC TUBING THEREIN THROUGH ONE END PORTION THEREOF, THE ONE END PORTION OF SAID NIPPLE MEMBER HAVING AN EXTERIOR PERIPHERY OF A SIZE TO ENGAGE WITHIN THE ENLARGED SMOOTH PORTION OF SAID COUNTERBORE, ANNULAR RESILIENT SEAL MEANS RADIALLY DEFORMABLE IN RESPONSE TO LONGITUDINAL COMPRESSION HAVING AN INTERIOR PERIPHERY OF A SIZE TO ENGAGE THE OUTER PERIPHERY OF SAID PLASTIC TUBING IN ABUTTING RELATION OUTWARDLY OF SAID COLLAR AND AN EXTERIOR PERIPHERY OF A SIZE TO ENGAGE WITHIN SAID FIRST SMOOTH COUNTERBORE PORTION, THE OUTER PERIPHERY OF SAID NIPPLE MEMBER HAVING THREADS THEREON INTERENGAGING WITH SAID THREADED PORTION OF SAID COUNTERBORE, THE ENLARGED SMOOTH PORTION OF SAID COUNTERBORE BEING OF GREATER LENGTH THAN THE THREADS ON SAID NIPPLE MEMBER TO PROVIDE A MECHANICALLY STRONG CONSTRUCTION, THE INTERENGAGEMENT OF SAID THREADS BEING OPERABLE IN RESPONSE TO A RELATIVE TURNING MOVEMENT BETWEEN SAID MEMBERS TO EFFECT A LONGITUDINAL COMPRESSION OF SAID SEAL MEANS BETWEEN SAID COLLAR AND THE END OF SAID NIPPLE MEMBER TO THEREBY RADIALLY DEFORM SAID SEAL MEANS INTO PRESSURE TIGHT ENGAGEMENT WITH SAID COUNTERBORE AND THE EXTERIOR PERIPHERY OF SAID TUBING, AND STOP MEANS ON THE EXTERIOR PERIPHERY OF SAID NIPPLE MEMBER SPACED FROM SAID ONE END THEREOF ENGAGEABLE BY THE ADJACENT END OF SAID HOLDER MEMBER FOR LIMITING THE AMOUNT OF LONGITUDINAL COMPRESSION OF SAID SEAL MEANS.