GB927467A - Improvements in or relating to equipment for mounting pneumatic tyres on, and dismounting them from, vehicle wheels - Google Patents

Abstract

927,467. Tyre mounting equipment. J. BROCKHOUSE & CO. Ltd. May 26, 1961 [June 1, 1960], No. 19433/60. Class 144 (1). In a tyre mounting and dismounting apparatus the wheel 8 is supported horizontally on a flanged inverted conical member 6, carried by a vertical fulcrum port 2, by means of an inverted conical clamping member 13 slidably received on the port 2 and held against axial displacement away from the wheel by an adjusting member 17 which is also slidably received on the post 2 and held against axial movement away from the member 13 by means of a pin 20 engaged in the appropriate one of a series of transverse holes 19 through the post 2, the members 13, 17 having co-operating helical cam surfaces 15, 16 whereby rotation of the adjusting member 17 effects final clamping of the wheel on the member 6 by the member 13. As shown, the post 2 comprises a tube 3 welded to a base-plate 1 and extended by a solid post 4 pinned within its upper end by a pin 5. The wheel-supporting member 6 is sleeved on to the post 4 and is radially ribbed at 10 for strength, a slot 9 being provided therein to receive a pin 11 carried by the clamping member 13 and engaged through a hole in the wheel body to prevent rotation of the wheel on the support. The cam surface 15 is formed on the end of a boss upstanding from the lower end of the clamping member 13 and lying wholly therewithin, and the adjusting member 17 is radially winged to facilitate manual rotation thereof. For use with wheels having non- standard wheel centres, an adaptor plate 23 may be pinned to the flange 7 of the support 6. A bead-breaking tool 34, Fig. 5, for use with the apparatus comprises a lever 35 with a hook 36 at one end for engagement in one of a series of holes 37 in the tube 3, and a handle 42 at the other end, a pair of spade-carrying bars 39 being pivoted to the lever towards the hook end thereof whereby, with a tyred wheel located by a stud 41 on the base-plate 1 and the lever hook engaged in a suitable hole 37, the spade 40 depends into engagement with the tyre bead for bead-breaking operation by the lever 35, as shown in Fig. 7. Loops 43, 44 welded to the tube 3 serve to support the bead-breaking tool 34, and also the conventional tyre manipulating tool 26, Fig. 2, when not in use.