Disc tiller |
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| 申请号 | US3703932D | 申请日 | 1970-08-31 | 公开(公告)号 | US3703932A | 公开(公告)日 | 1972-11-28 |
| 申请人 | FLOYD W TUTTLE; RALPH W TUTTLE; | 发明人 | TUTTLE FLOYD W; TUTTLE RALPH W; | ||||
| 摘要 | A single-unit and a multiple-unit earth worker are provided. An elongated frame has earth-working members supported therebelow. A transversely disposed support member is centrally and pivotally attached to the rear end of the frame to pivot in a horizontal plane. The forward end of the frame has a pivotally mounted hitch, and a pivotally mounted wheel. The rear support member has a caster wheel mounted on each end. A first link connects the rear support member and the forward wheel, the link restraining same in normal position and operable to horizontally angle the wheel. A second link connects the first link and is rigidly connected to the hitch. A restraining link connects the transverse support member at the rear and the frame to restrict the extent of pivotal movement of the frame about the transverse support member. Turning linkage connects the frame and the hitch member. In the multi-unit embodiment, a plurality of caster wheels is used, one on each end of the frame and on opposite sides thereof. Caster linkage is connected to the hitch and the end caster wheels, such being operable to position the caster wheels relative the frame. Angular linkage connects the hitch and the frame, with such operable to rotate the hitch to proper position in relation to the frame, and turning linkage connects the frame and the hitch. Numerous types of earth workers such as disc tillers are known in the prior art operable to be turned in either direction, to the right or left. However, these disc tillers are one normally operable to be pulled with the discs inclined in one direction and turn more easily in one direction than the other. Also, many of the prior art devices are adjustable for the depth of the cut by varying the height at the wheel supports; this is usually done by a hand adjustment. | ||||||
| 权利要求 | 1. Single-unit two-way earth working means comprising: a. an elongated horizontal frame member, having earth working members supported therebelow, b. a transverse support member pivotally attached at a center portion to a rear end portion of said horizontal frame member and operable to pivot horizontally, c. an elongated hitch member pivotally mounted on a forward end portion of said horizontal frame member and extending forwardly therefrom, d. pivotable wheel means mounted on the forward end of said horizontal frame member, e. caster wheels mounted on respective opposite end portions of said transverse support member, f. first linkage means connected with said transverse support member and said wheel means operable to horizontally angle said wheel means, and said castor wheels, g. second linkage means connected to said first linkage means, said frame member, and operably connected to said hitch member, h. a third linkage means connected with said transverse support member and said horizontal frame member restricting the extent of pivotal movement of said horizontal frame member about said transverse member, i. turning linkage means connected to said frame member and said hitch member operable to rotate said horizontal frame member relative to said hitch member from the earth working to the trailing position, j. said first linkage means is a bar linkage means that has two elongated bar members and one idler member, k. one of said elongated bar members is connected on k. end to said wheel means operable to angularly rotate said wheel means and pivotally connected on the other end to said idler member, l. the other one of said elongated bar members is connected at one end portion to said idler member and an opposite end portion is pivotally connected to said transverse support member, and m. said idler member is connected by a support member to said horizontal frame member whereby said first linkage means correlates pivotal movement of said wheel means and said caster wheels. 2. The earth working means described in Claim 1 wherein: a. said second linkage means includes a cable means connected to a wheel member mounted on said hitch member and said cable means is trained about said idler member, and b. said second linkage means is operable to actuate said first linkage means on actuation of said turning linkage means and movement of said horizontal frame member to position said forward wheel means and said transverse support member for trailing movement. 3. The earth working means described in Claim 2, wherein: a. said third linkage means has a chain member connected to said rear end portion of said horizontal frame member and to said caster wheels, and b. said third linkage means is operable to position said caster wheels in the forward motion position relative said hitch member and said horizontal frame member. 4. The earth working means described in Claim 3, wherein: a. said turning linkage means has a piston and cylinder means pivotally mounted on said horizontal frame member and pivotally mounted on said hitch member, and b. said piston and cylinder means is operable upon control from the vehicle normally pulling said earth working means to rotate said horizontal frame member relative to said hitch member, and c. said pivotable wheel means and said caster wheels have fluid control means operable to vary the height of said horizontal frame member above ground surface. 5. A multi-unit two-way earth worker comprising: a. an elongated frame means having an earth working means supported therebelow, b. a plurality of caster means including one of said caster means mounted on each end of said frame means and one each of said caster means mounted on opposed sides of a center portion of said frame means, c. hitch means pivotally mounted to a forward end portion of said frame means, d. cable linkage means connected to said hitch means and said caster means connected to opposite ends of said frame means operable to properly position said frame means relative to said hitch means, e. a turning linkage means connected to said frame means and said hitch means, f. said frame means has a hinge therein between the forward end portion and a rear end portion to allow flexural movement for movement over rough terrain, g. said cable linkage means includes a cable connected to said hitch means and to said caster means mounted on the rear of said frame means and a cable connected to said hitch means to said caster means mounted on the forward end of said frame means, and h. said turning linkage means includes piston and cylinder means pivotally attached to said frame means and to said hitch means operable to rotate said frame means relative said hitch means. 6. The earth worker as described in claim 5, wherein caster means mounted on opposite sides and centrally of said frame means having lock means connected to said frame means and engagable with said central said caster means to lock for roading condition aligned with said frame means. |
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