(19)
(11) EP 0 119 007 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.12.1984 Bulletin 1984/49

(43) Date of publication A2:
19.09.1984 Bulletin 1984/38

(21) Application number: 84300814

(22) Date of filing: 09.02.1984
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 10.02.1983 GB 8303633

(71) Applicant: ARMSTRONG FASTENINGS LIMITED
 ()

(72) Inventor:
  • Stephens, Ronald Bertram
     ()

   


(54) Apparatus for installing rivet nuts


(57) ) Apparatus for installing rivet nuts comprises a body (9) having therein a spindle (5) which is drivable in the forward and reverse directions and a threaded mandrel (29) for receiving the rivet nut, and an anvil (35) against which the rivet nut abuts.
In order to avoid damaging of the rivet nut when crimping it in position, a clutch (45, 47) is disposed between the spindle and threaded mandrel to prevent rotation of the latter when a predetermined torque is reached. The mandrel is engaged by a pull sleeve (21) and an axial load is applied to the mandrel and hence to the rivet nut by way of a pull nut (19) which is received threadingly on the spindle and which co-operates with the pull sleeve (21).







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