# US 4,930,801 A · Front mounted implement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,930,801 A - Document ID: US4930801A - Status: Granted - Kind: A - Application number: 07/098,483 - Filed: 1987-09-18 - Granted: 1990-06-05 - Earliest claimed: 1987-09-18 - Assignees: Mathews Company - Inventors: Ronald D. Gillund - Web page: https://patentgrep.com/patent/US4930801A ## CPC - A01B 59/048: having pulling or pushing means arranged on the front part of the tractor - B62D 49/04: modified to take pushing devices - Y10S 56/10: Uneven terrain compensation - A01B: SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL (making or covering furrows or holes for sowing, planting or manuring A01C5/00; mowers convertible to soil working apparatus or capable of soil working A01D42/04; mowers combined with soil working implements A01D43/12; soil working for engineering purposes E01, E02, E21) - B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract An implement adapted for connection to a vehicle three point hitch on the front of a pushing vehicle wherein the implement is provided with at least one forward ground contacting rolling support means mounted to a forward portion of the implement frame, at least one rear ground contacting rolling support means mounted to a rear portion of the implement frame, and a rear upper implement hitch connection which provides a vertically pivotal and longitudinally floating link means. The implement and hitch connection of this invention provides an implement capable of being pushed by a vehicle over uneven terrain while providing implement treatment at a predetermined even distance above the uneven terrain. ## Claims ### Claim 1 An implement adapted for connection to a front of a pushing vehicle comprising: the pushing vehicle having a vehicle three point hitch with two horizontally spaced forwardly extending vehicle lower hitch brackets defining two lower hitch points and a vehicle upper hitch bracket defining an upper hitch point, the implement comprising: an implement frame; at least one forward ground contacting rolling support means mounted to a forward portion of said implement frame; at least one rear ground contacting rolling support means mounted to a rear portion of said implement frame; two horizontally spaced implement lower hitch brackets rigidly mounted on a rear portion of said implement frame; each said implement lower hitch bracket mounted to a forward portion of a corresponding said vehicle lower hitch bracket; an implement upper hitch bracket secured to said implement frame at a rear portion of the implement, an adjustable link means having one end attached to said implement upper hitch bracket and an opposite end pivotally attached to said vehicle upper hitch bracket, and said adjustable link means allowing longitudinal floating displacement of said implement upper hitch bracket along an axis of said adjustable link means for maintaining said at least one rear ground contacting rolling support means in continuous contact with the terrain while the pushing vehicle is in operation; and an implement hoisting hydraulic cylinder having one cylinder end pivotally secured to one of said vehicle lower hitch brackets and an opposite cylinder end secured to said vehicle upper hitch bracket. ### Claim 2 (depends on 1) An implement according to claim 1 wherein said forward ground contacting rolling support means comprises at least one caster. ### Claim 3 (depends on 1) An implement according to claim 1 wherein said forward ground contacting rolling support means comprises two horizontally spaced casters. ### Claim 4 (depends on 1) An implement according to claim 1 wherein said rear ground contacting support means comprises at least one caster. ### Claim 5 (depends on 1) An implement according to claim 1 wherein said rear ground contacting support means comprises two horizontally spaced casters. ### Claim 6 (depends on 1) An implement according to claim 1 wherein said adjustable link means comprises a hydraulic cylinder/piston assembly operating on low hydraulic pressure. ### Claim 7 (depends on 1) An implement according to claim 1 wherein said forward ground contacting rolling support means comprises at least one caster and said rear ground contacting support means comprises at least one caster. ### Claim 8 (depends on 1) An implement according to claim 1 wherein said forward ground contacting rolling support means comprises two horizontally spaced casters and said rear ground contacting support means comprises two horizontally spaced casters. ### Claim 9 (depends on 8) An implement according to claim 8 wherein said adjustable link means comprises a hydraulic cylinder/piston operating on low hydraulic pressure. ### Claim 10 (depends on 1) An implement according to claim 1 wherein said lower vehicle hitch brackets and said lower implement hitch brackets are connected by floating link means allowing vertical movement therebetween. ### Claim 11 (depends on 1) An implement according to claim 1 wherein said forward ground contacting rolling support means comprises two horizontally spaced forward casters, said rear ground contacting support means comprises two horizontally spaced rear casters, and said adjustable link means comprises a hydraulic cylinder/piston assembly operating on low hydraulic pressure. ### Claim 12 In an implement for attachment to the front of a pushing vehicle, the improvement comprising: said implement having at least one forward ground contacting rolling support means mounted to a forward portion of an implement frame and at least one rear ground contacting rolling support means mounted to a rear portion of said implement frame; two horizontally spaced implement lower hitch brackets rigidly mounted on a rear portion of said implement frame; each said implement lower hitch bracket mounted to a forward portion of a corresponding vehicle lower hitch bracket; an implement upper hitch bracket secured to said implement frame at a rear portion of the implement, an adjustable link means having one end attached to said implement upper hitch bracket and an opposite end pivotally attached to said vehicle upper hitch bracket, said adjustable link means allowing longitudinal floating displacement of said implement upper hitch bracket along an axis of said adjustable link means for maintaining said at least one rear ground contacting rolling support means in continuous contact with a terrain while the pushing vehicle is in operation; and an implement hoisting hydraulic cylinder having one cylinder end pivotally secured to one of said vehicle lower hitch brackets and an opposite cylinder end secured to said vehicle upper hitch bracket. ### Claim 13 (depends on 1) An implement according to claim 1 wherein said at least one rear ground contacting rolling support means comprises a roller. ### Claim 14 (depends on 1) An implement according to claim 1 wherein said adjustable link means comprises a spring rod pivotally mounted at a central portion to said implement upper hitch bracket and having a spring mounted on each end portion and adapted to apply force to each side of said implement upper hitch bracket. ### Claim 15 (depends on 1) An implement according to claim 1 wherein said at least one forward ground contacting rolling support means comprises at least one caster mounted to said implement frame and said rear ground contacting support means comprises a roller mounted to said implement frame. ### Claim 16 (depends on 1) An implement according to claim 1 wherein said at least one forward ground contacting rolling support means comprises two horizontally spaced casters mounted to said implement frame and said rear ground contacting support means comprises a roller mounted to said implement frame. ### Claim 17 (depends on 16) An implement according to claim 16, wherein said adjustable link means comprises a hydraulic cylinder/piston assembly operating on low hydraulic pressure. ### Claim 18 (depends on 16) An implement according to claim 16 wherein said adjustable link means comprises a spring rod pivotally mounted at a central portion to said implement upper hitch bracket and having a spring mounted on each end portion and adapted to apply force to each side of said implement upper hitch bracket.