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    • 7. 发明专利
    • Quick coupler for bucket excavators
    • GB2330570A
    • 1999-04-28
    • GB9819598
    • 1998-09-08
    • MILLER RONALD KEITHMILLER GARYMILLER DOREEN JACQUELINE
    • MILLER GARY
    • E02F3/40E02F3/36
    • A coupler for connecting a dipper arm 3 of an excavator to a bucket without the need for the operator of the excavator to leave the cab of the excavator, the coupler having means for connecting it to the end of the dipper arm, and means, including a latching hook 17 for connecting it to one of a plurality of different buckets and wherein locking means 25 is provided to prevent inadvertent unlatching of the latching hook, said locking means being operable from the cab. The locking means may be gravity operated as shown and include resiliently deformable means 27 thereon to prevent unlatching when the coupler is inverted. Alternatively, it may be spring operated (71, Fig 13) in which case, further means (73 or 75) is provided to move the locking means against the bias of the spring. The further means may be a cord and pulley (73) or hydraulic cylinder (75). The hook 17 may have one or more steps (41, Fig 8) to engage with a locking bar. Preferably the lock is released by gravity, as the bracket reaches full curl position. Preferably the latch is hydraulically actuated 19. Preferably, the hook has a special internal profile so that when it is supporting the weight of a bucket, it will tend to move to a latching position, not to an unlatching position.
    • 9. 发明专利
    • Universal coupler for bucket excavators
    • GB2359062B
    • 2002-01-02
    • GB0003267
    • 2000-02-11
    • MILLER RONALD KEITHMILLER GARYMILLER DOREEN JACQUELINE
    • MILLER GARYMILLER RONALD KEITHMAGUIRE PAUL
    • E02F3/40E02F3/36
    • The coupler has a pair of spaced side frames ( 25 a) in each of which a first hook like aperture ( 13 ) is provided for engagement with a first pivot pin provided on an excavator bucket and wherein a locking pin ( 23 ) is moveable from and into a locking position in which it prevents the latching hook ( 17 a) from disengage from a second pivot pin ( 9 a), ( 9 b) or ( 9 c) on the bucket there being a plurality of locking positions for the pin to accommodate different buckets. Preferably, a plurality of spaced apertures ( 27 ), ( 29 ), ( 31 ) are formed on each of the side frames ( 25 a), those in one frame being transversely aligned with those in the other frames, and preferably also a plurality of spaced apertures ( 33, 35 ) and/or latching surfaces are formed on the latching hook or on an extension thereof, through or against which the locking pin ( 23 ) can be passed or can bear to prevent relative movement between the hook ( 17 a) and side frames. Preferably, the piston end cylinder device ( 19 a) for operating the latching hook has a much longer stroke than usual and the side frames ( 25 a) of the coupler are longer than those of known couplers, there being a downwardly opening recess ( 15 a) in the side frames which is much wider than usual to accommodate different pin spacings on the buckets of different manufacturers.