Rear furrow wheel locking structure for disk tillers and the like

Claim 2

In an agricultural implement having a frame member, a support member carrying a ground-engaging wheel adapted to support the frame member, said support member pivotally connected with the frame member for swinging movement about an upright axis and an improved means between the frame member and support member for securing one said member in either a first or second position relative to the other said member comprising: an elongated link means carried by said one member; guide means carried by said other member and supporting the link means for reciprocable movement between a first and second position as the one member moves between its first and second position relative to the other member; first locking means between the link means and the other member for engagably locking the link means in its first position and the one member in its first position relative to the other member; second locking means between the link means and the other member for engagably locking the link means in its second position and the one member in its second position relative to the other member; and means cooperative with the first and second locking means for selectably urging either of said first or second locking means into engagement with said link means.

Claim 3

In an agricultural implement having a frame member, a support member including a ground-engaging wheel adapted to support the frame member, said support member pivotally connected to the frame member and adapted for swinging movement about an upright axis, and an improved means between the frame member and support member for securing one said member in either a first or second position relative to the other said member comprising: a generally horizontal elongated link means carried by said one member and having a pair of first and second spaced apart abutment surfaces; guide means carried by said other member and supporting the link means for reciprocable movement between a first and second position as the one member moves between its first and second positions relative to the other member; locking means carried by the other member for securing the link means in either its first or second position including latch means mounted substantially perpendicularly to the link means for reciprocable movement between a first position permitting engagement with the abutment surfaces of the link means and a second position not permitting said engagement, said latch means including a surface engagable with the first of each pair of abutment surfaces when the latch means is in its first position to limit reciprocable movement of the link means in one direction; and stop means registrable with the second of each pair of abutment surfaces on said link means to limit movement of the link means in the other direction.

Claim 4

In an agricultural implement having a frame member, a support member including a ground-engaging wheel adapted to support the frame member, said support member pivotally connected to the frame member and adapted for swinging movement about an upright axis, and an improved means between the frame member and support member for securing one said member in either a first or second position relative to the other said member comprising: a generally horizontal elongated link means carried by said one member and having a pair of first and second spaced apart abutment surfaces; guide means carried by said other member and supporting the link means for reciprocable movement between a first and second position as the one member moves between its first and second positions relative to the other member; locking means carried by the other member for securing the link means in either its first or second position including latch means mounted substantially perpendicularly to the link means for reciprocable movement between a first position permitting engagement with the abutment surfaces of the link means and a second position not permitting said engagement, said latch means including a surface engagable with the first of each pair of abutment surfaces when the latch means is in its first position to limit reciprocable movement of the link means in one direction; and stop means registrable with the second of each pair of abutment surfaces on said link means to limit movement of the link means in the other direction.

Claim 5

The invention defined in claim 2 further including means for releasably maintaining said latch means in either its first position or its second position.

Claim 6

The invention defined in claim 2 further including a housing carried by the guide means, and the latch means includes a pair of spaced apart latch members slidably mounted for reciprocable movement in said housing and the means for releasably maintaining said latch members in their first and second position includes springs means acting on each latch member and urging it towards the link means.

Claim 7

The invention defined in claim 4 wherein the means for releasably maintaining said latch means in either its first or second position further includes a lever arm pivotally supported between its ends and between the latch members, coupled by lost motion connection to each said latch member and a pin means insertable through openings in either latch member and engageable with the housing to restrict movement of said member.

Claim 8

In an agricultural implement having a frame member, a wheel support member pivotally connected to the frame member and adapted for swinging movement about an upright axis, a groundengaging wheel carried by the support member, and an improved locking means between the frame member and support member for securing said members in either a first position relative to one another or a second position relative to one another comprising: a generally horizontal elongated link means carried by one said member; a pair of first and second horizontally spaced abutment surfaces carried on and projecting from the link means; guide means carried by the other said member and supporting the link means for reciprocable movement between the pairs of spaced apart abutment surfaces; first and second stop surfaces adjacent the guide means to alternatively limit movement of the link means in opposite directions upon one of said first abutment surfaces moving into engagement with one of said stop surfaces; and latching means carried by the other member including first and second latch members, one said latch member horizontally spaced from each said stop surface and engagable with a respective one of said second abutment surfaces of the link means when said one first abutment surface is engaged with one of said stop surfaces to restrict movement of the link means in the other direction; and means for selectively and releasably engaging each said latch member with its respective second abutment surface.

Claim 9

In an agricultural implement having a frame member, a wheel support member pivotally connected to the frame member and adapted for swinging movement about an upright axis, a groundengaging wheel carried by the support member, and an improved locking means between the frame member and support member for securing said members in either a first position relative to one another or a second position relative to one another comprising: a generally horizontal elongated link means carried by one said member; a pair of first and second horizontally spaced abutment surfaces carried on and projecting from the link means; guide means carried by the other said member and supporting the link means for reciprocable movement between the pairs of spaced apart abutment surfaces; first and second stop surfaces adjacent the guide means to alternatively limit movement of the link means in opposite directions upon one of said first abutment surfaces moving into engagement with one of said stop surfaces; and latching means carried by the other member including first and second latch members, one said latch member horizontally spaced from each said stop surface and engagable with a respective one of said second abutment surfaces of the link means when said one first abutment surface is engaged with one of said stop surfaces to restrict movement of the link means in the other direction; and means for selectively and releasably engaging each said latch member with its respective second abutment surface.

Claim 10

The invention defined in claim 6 wherein an inclined surface extends between one of said pair of first and second abutment surfaces on the guide means and the latch member which is engageable with said second abutment surface includes a complementary inclined surface.

Claim 11

In an agricultural implement having a frame member, a wheel support member pivotally connected to the frame member and adapted for swinging movement about an upright axis, a groundengaging wheel carried by the support member, and an improved locking means between the frame member and support member for securing said members in either a first position relative to one another or a second position relative to one another comprising: a generally horizontal link means carried by one said member, said link means having horizontally spaced apart abutment surfaces; guide means carried by the other said member and supporting the link means for reciprocable movement between first and second positions; latching means carried by the other member, including first and second horizontally spaced apart latch members, each said latch member slidably mounted in a housing for reciprocable movement between first and second positions; biasing means urging said latch members towards their first position; lever means for moving said latch members from their first position including a lever arm pivotally carried on a fulcrum supported by the other member between the latch members, said lever arm coupled to each latch member with a lost motion connection; and releasable means on the other member for securing each said latch member in its second position.

Claim 12

In an agricultural implement having a frame member, a wheel support member pivotally connected to the frame member and adapted for swinging movement about an upright axis, a groundengaging wheel carried by the support member, and an improved locking means between the frame member and support member for securing said members in either a first position relative to one another or a second position relative to one another comprising: a generally horizontal link means carried by one said member, said link means having horizontally spaced apart abutment surfaces; guide means carried by the other said member and supporting the link means for reciprocable movement between first and second positions; latching means carried by the other member, including first and second horizontally spaced apart latch members, each said latch member slidably mounted in a housing for reciprocable movement between first and second positions; biasing means urging said latch members towards their first position; lever means for moving said latch members from their first position including a lever arm pivotally carried on a fulcrum supported by the other member between the latch members, said lever arm coupled to each latch member with a lost motion connection; and releasable means on the other member for securing each said latch member in its second position.