Earth Working Patents (Class 172)
- Subsurface shears or nippers (Class 172/36)
- Tool rotated by attendant (Class 172/37)
- With obstruction feeling device for moving or releasing implement (Class 172/38)
- With cleaner or comminutor spaced from ground surface (Class 172/39)
- Vibrating tool (Class 172/40)
- Attendant supported tool (Class 172/41)
- Guided by walking attendant (Class 172/42)
- Subsurface shaft or bar (e.g., rod weeder) (Class 172/44)
- Flails (Class 172/45)
- Coaxial tools oppositely rotated (Class 172/46)
- With specific relationship of mast-type hitch (i.e., three-point hitch) to implement (Class 172/47)
- Plural driven tools (Class 172/48)
- Intermittent drive for tool (Class 172/61)
- With non-driven tool (e.g., plow, harrow, drag, scraper, knife or roll, etc.) (Class 172/63)
- With power take-off from tool drive to adjust tool (Class 172/74)
- Interconnected tool lift and drive control (Class 172/75)
- Implement with ground support for depth control (Class 172/76)
- With wheel substitute (e.g., runner, etc.) (Class 172/80)
- With plant deflector or protector (Class 172/81)
- Driven tool selectively shiftable along line of travel (Class 172/82)
- Simultaneously reciprocating and oscillating blade having elongated shank (Class 172/84)
- Irregular or off-center ground-engaging wheel or support (Class 172/90)
- Blade movable with respect to cyclically driven carrier (Class 172/91)
- Compound motion for tool (e.g., reciprocating and oscillating, reciprocating and rotating) (Class 172/97)
- Tool mounted for lateral shifting (Class 172/98)
- Blade on endless driven belt or chain (Class 172/100)
- Tool guided for rectilinear reciprocation (Class 172/101)
- With overload relief or clutch in drive train (e.g., overload release, etc.) (Class 172/103)
- Driven from rolling or driven ground wheel (Class 172/105)
- Tool driven about horizontal, longitudinal axis (Class 172/107)
- Tool driven about generally vertical axis (e.g., oscillating choppers, etc.) (Class 172/110)
- With deflector or shield for thrown material (Class 172/112)
- Specific propelling means (Class 172/114)
- Tool freely or yieldably mounted on chassis (Class 172/117)
- Tool driven about axis transverse to draft line (Class 172/118)
- Tool driven about diagonal axis (Class 172/124)
- Tool drive details (Class 172/125)
- With laterally offset inclined shoulder forming tool (Class 172/782)
- With scraper attached ground support (Class 172/783)
- With diverse tool or portion (Class 172/784)
- Plural scrapers (Class 172/786)
- Push frame for scrapers (Class 172/788)
- Actuator for bodily shifting scraper subframe draft connection (Class 172/789)
- Counterbalance means for scraper adjustment (Class 172/790)
- Three or more independently operable scraper actuators (Class 172/791)
- Spring biased into ground contact (Class 172/794)
- Specific actuator between frame and scraper (Class 172/795)
- Actuator for tilting wheel relative to vehicle frame (Class 172/798)
- Specific means for horizontally angling wheel relative to vehicle frame (Class 172/799)
- One located in path of implement wheel (Class 172/134)
- One implement surrounds another (Class 172/135)
- Tools usable alternately only (Class 172/136)
- With means to vary spacing of tools upon turning (Class 172/137)
- With interconnected vertical adjustment (Class 172/138)
- With independent means for vertical movement (Class 172/140)
- Interconnected adjustment of horizontal angle of rolling and position of diverse tool (Class 172/141)
- Including spring formed tool or standard (Class 172/142)
- Including intermittently rolling tool (Class 172/143)
- Colter, jointer and plow (Class 172/144)
- Three or more diverse implements following same path (A, B, C, or A, B, A,) (Class 172/145)
- At least four alternately diverse laterally spaced tools (A, B, A, B) (Class 172/152)
- Laterally spaced like tools with intermediate diverse tool (A, B, A) (Class 172/155)
- Including implement alternating for right or left hand operation (Class 172/161)
- Jointer and plow (Class 172/163)
- Including colter (Class 172/165)
- Fixed point or share with rotary moldboard (Class 172/167)
- Rotating tool with fixed moldboard (Class 172/168)
- Including tool rotatable about vertical axis (Class 172/169)
- Including smooth levelling roller (Class 172/170)
- Rolling and non-rolling (Class 172/174)
- Diverse rolling (Class 172/184)
- Runner attached (Class 172/188)
- Including fabric or flexible tool (Class 172/189)
- Including vertical, longitudinally oriented disc or blade (e.g., as stabilizer) (Class 172/190)
- Including horizontal knife or cutter (Class 172/192)
- First tool with spaced trailing sweep (Class 172/193)
- Second implement follows path of first (Class 172/195)
- Laterally spaced (Class 172/201)
- Draft revoluble on transverse axis (Class 172/205)
- Interrelated tool shift and lateral movement of draft member (Class 172/206)
- Interrelated tool lift and shift (Class 172/209)
- Interrelated tool shift and ground support manipulation (Class 172/212)
- Tools oriented for movement in opposite directions (Class 172/213)
- Shiftable moldboard (Class 172/218)
- Tool shifted for opposite throw (Class 172/219)
- Axially rotatable implement (Class 172/224)
- Parallel separate tools (Class 172/228)
- Oblique axis in longitudinal vertical plane (Class 172/232)
- With ground support (Class 172/298)
- Power actuator with cut-out or lock-out means (Class 172/299)
- With rearwardly mounted tool (Class 172/300)
- Power actuator with manual adjusting or supplemental manual actuating means (Class 172/303)
- Tools independently actuatable (Class 172/304)
- With means for moving tool laterally (Class 172/305)
- Connected to front axle (Class 172/306)
- Parallelogram type lift (Class 172/307)
- With push bar (Class 172/308)
- Pivoted on horizontal diagonal axis (Class 172/309)
- With seat for moving hitch (Class 172/330)
- Hitch guided relative to supporting frame (Class 172/331)
- Tool manipulated with respect to mounting frame (Class 172/332)
- Rolling tool (Class 172/349)
- Guided or propelled by walking attendant and with ground support or draft means (Class 172/351)
- With attendant attaching means (Class 172/370)
- Hand tool (Class 172/371)
- Vertically adjustable or selectively lockable hitch (Class 172/396)
- Tool land ground support moved together relative to frame (Class 172/397)
- With power take-off from plural wheels (Class 172/399)
- Actuator and interconnected means for adjusting wheels on different axles (Class 172/400)
- Power operated adjustment (Class 172/407)
- Flexible or lost motion connection to actuator (Class 172/414)
- Translating motion (Class 172/415)
- Plural ground supports vertically adjustable relative to each other and the frame (Class 172/421)
- Crank axle with angularly spaced wheel carrying arms (Class 172/422)
- With actuator (Class 172/423)
- Angled gangs liftable as a unit (Class 172/440)
- Struts on trailer or between implement parts (Class 172/443)
- Hitch quadrilateral modified during lift (Class 172/444)
- With means operated by vertical hitch movement (Class 172/445)
- Including blade, scraper, or smoother (Class 172/445.1)
- Laterally adjustable tool (Class 172/446)
- With auxiliary vertical adjustment (Class 172/448)
- Tool movable relative to mast while earth working (Class 172/449)
- Sway limiting means or swayable tool (Class 172/450)
- With tool frame or bar extending beyond sides of vehicle (Class 172/451)
- Actuator electrically powered (Class 172/453)
- Angled gangs lifted as a unit (Class 172/454)
- Central group liftable vertically, side groups movable inwardly (Class 172/456)
- With means to restrain lateral sway when raised (Class 172/457)
- Vertical movement interrelated with another (Class 172/458)
- Pivotable about longitudinal axis (e.g., lateral levelling, etc.) (Class 172/459)
- Tool lifted with respect to stationary or relatively movable cleaner (Class 172/461)
- Plural tools, individually spring biased down, lifted as unit (Class 172/462)
- Lift actuator moves with tool or forms removable unit therewith (Class 172/463)
- Servo-motor forces tool down (Class 172/464)
- Servo-motor with follow-up control (e.g., motion responsive position control, etc.) (Class 172/465)
- Tool held raised for relieving load on servo-motor (Class 172/466)
- With shiftable hitch causing vertical movement (Class 172/467)
- Plural tools, independently actuatable (Class 172/468)
- Plural tools simultaneously raised, individually lowered (Class 172/472)
- Tool differentially or sequentially lifted at longitudinally spaced points (Class 172/473)
- Tool rocked about independently vertically adjustable transverse axis (Class 172/474)
- With lateral adjustment (Class 172/476)
- Tool and lift actuator on opposite sides of transverse pivot axis (Class 172/478)
- Tool lifted forward of transverse pivot axis (Class 172/479)
- Tool swung about freely shiftable or delayed pivot (Class 172/480)
- With separate latch (Class 172/481)
- Tool swings about rock shaft axis (Class 172/482)
- Translatable tool (Class 172/483)
- Power actuator with manual adjusting or supplemental manual actuating means (Class 172/485)
- Single lift actuator for plural relatively movable tools (Class 172/488)
- Rotary drum actuator (Class 172/490)
- Servo-motor actuator (Class 172/491)
- With power take-off for actuator (Class 172/492)
- Overcenter or toggle holding means (Class 172/494)
- Foot operated actuator (Class 172/495)
- Tool spring biased during operation (Class 172/497)
- Lost motion connection between actuator and tool (Class 172/501)
- Actuator slidably connected to tool (Class 172/503)
- Screw actuator (Class 172/504)
- Tool connected to frame by bail (Class 172/505)
- Spring assisted or spring actuator (Class 172/506)
- Yieldable material rim (e.g., rubber, etc.) (Class 172/519)
- Tools on different axes in mutual driving relationship (Class 172/520)
- With power take-off from tool or wheel (Class 172/521)
- Axis substantially vertical (Class 172/522)
- Axis substantially longitudinal (Class 172/527)
- With means for stopping or retarding rotation (Class 172/528)
- Wobble discs (Class 172/531)
- Screw or spiral (Class 172/532)
- Clutch between shaft and rotating element (Class 172/533)
- Wheel or roller with peripherally spaced plant saving means (Class 172/534)
- Detachable rim for disk (Class 172/535)
- Wheel, roller or gauge and axially adjacent tool on same axis (Class 172/536)
- Corrugated surface rollers (Class 172/537)
- Paired press rims (e.g., planter press wheels, etc.) (Class 172/538)
- Smooth roller with groove, rim or disk (Class 172/539)
- Tool has circumferentially spaced teeth, tines, blades or the like (Class 172/540)
- Rim with spokes (Class 172/557)
- With disk cleaning means (Class 172/558)
- Disk gang and single disk on diverse axes (Class 172/567)
- Disk gang with movable or removable section (Class 172/568)
- Disks pivoted on vertical axes with interconnected means for moving them indentically (Class 172/569)
- With spring means other than for detent (Class 172/570)
- Plural disks with individual mount or axis (Class 172/574)
- Reversible group (Class 172/577)
- With wheel (not on motor vehicle) (Class 172/578)
- Plural groups of disks (Class 172/579)
- Disk gang (Class 172/599)
- Single disk freely swayable (Class 172/602)
- Disk horizontally angularly changeable (Class 172/603)
- Detailed disk structure per se (Class 172/604)
- Tool pivots on pivoted member when member moves (Class 172/614)
- Tools assume different angularity for opposite draft (Class 172/618)
- Plural tool groups relatively vertically movable because of operation (Class 172/619)
- Parallel, pivotally adjusted tool bars (Class 172/634)
- Tool group pivotally adjustable about horizontal axis (Class 172/640)
- Beam spreader of the pivoted yoke type (Class 172/641)
- Pair of tools cooperate to move earth to or from plant row (Class 172/642)
- Spring formed tool or standard (Class 172/643)
- Tools longitudinally adjustable to and from transverse alignment (Class 172/644)
- Tools relatively adjustable horizontally without causing vertical displacement (Class 172/645)
- Relatively movable because of operation (Class 172/657)
- Adjustable about spaced horizontal axes (Class 172/659)
- Vertically translatable tool (Class 172/661)
- Tool movable to non-use position (Class 172/662)
- Tool flexed to change contour (Class 172/682)
- Latched in earth working position (Class 172/683)
- Tool pivots on member when member moves (Class 172/684)
- Frame-supported blade, scraper, or smoother drawn by vehicle (Class 172/684.5)
- Plural tools (Class 172/685)
- Tool with laterally spaced standards (Class 172/698)
- Subsoilers (Class 172/699)
- Ridgers (Class 172/701)
- Tool is transversely elongated blade (e.g., bulldozer) (Class 172/701.1)
- Reversible part (Class 172/702)
- Spring biased or formed tool or tool part (Class 172/705)
- Tool assumes different position for opposite draft (Class 172/712)
- Tooth (Class 172/713)
- Plural earth engaging parts relatively movable because of operation (Class 172/714)
- With add-on cutting or wearing element applied directly over, or onto, the original cutting element (Class 172/719)
- Subsurface blade (e.g., weeder, etc.) (Class 172/720)
- Non-rectangular, symmetrical type (Class 172/721)
- Adjustable (Class 172/734)
- Welded (Class 172/745)
- With portion extended beyond landslide (Class 172/746)
- Specific material (Class 172/747)
- Pivoted tool (Class 172/748)
- Having separable parts interconnected without detachable fastening means (Class 172/749)
- With separable vertical planar longitudinal cutter (e.g., colter, etc.) (Class 172/752)
- Interlocked or interfitted parts (Class 172/753)
- Share and furrow slice inverting moldboard (Class 172/754)
- Specific tool and standard connection (Class 172/762)
- Specific standard and beam connection (Class 172/763)
- With separate runner, gauge, shoe or landslide (Class 172/764)
- Specific tool shape (Class 172/765)
- Removable tool portion (e.g., replaceable cutting or wearing element for tool) (Class 172/772)
- Specific standard (Class 172/773)
