Class 172/271 - Frangible lock (e.g., shear pin, etc.)

Subclass of Class 172 - Earth working
Definition: Apparatus wherein the element is rigidly held in place by
No. of patents: 40
Last issue date: 04/17/2007

Number	Title	Issue Date
7204318	Tracking hitch assembly utilizing tractor lift arms as stabilizers A tracking hitch assembly couples to the drawbar of the tractor in a conventional manner. To prevent the hitch from pivoting with respect to the drawbar, the hitch includes an adjustable hitch stabilizer which engages the lift arms of the tractor. When a pivoting fo...	04/17/2007
7156186	Strip-till conditioning rotary reel These and other objects and objectives are attained by providing an soil conditioning rotary reel for a strip-till primary tillage system, the rotary reel having a particular cross-sectional profile that forms the soil into a uniform raised berm ideally suited for p...	01/02/2007
6915728	Mine detonating apparatus and vehicle including such apparatus A mine detonating apparatus to be mounted to an armoured personnel carrier (1) is disclosed. A front roller assembly (4) is mounted at the front of a vehicle body (2) of the armoured personnel carrier (1) to apply pressure to the ground f...	07/12/2005
6606956	Planter coulter apparatus with mechanical overload protection A mechanical overload member apparatus for use with a planter apparatus including a coulter bar and coulter/fertilizer units mounted thereto, the coulter bar pivotally mounted to the underside of a wheel supported carrier frame designed for transport in a...	08/19/2003
6263976	Field marker for agricultural implement A field marker for mounting on an agricultural implement includes an elongated arm adapted to project outwardly laterally of the implement when in its operating position and is adapted to carry a field marking device at its outer distal end for making a s...	07/24/2001
5957216	Resettable breakaway system A breakaway system which is easily reset by a user and does not utilize shear pins or spring loaded tension devices. The inventive device includes a support member having a U-shaped cross-sectional area, an inner member attached to the support member, an ...	09/28/1999
5785128	Field marker A field marker for attachment to a farm implement to form a groove in the ground for guiding a farmer as the implement is towed or driven across a field includes an inner wing section pivotally connected to a lateral end of the implement and an outer arm ...	07/28/1998
5727636	Shank assembly with a shear release assembly for a row cultivator A row cultivator (10) includes a row following system (12) coupled to a toolbar (13) employing frame members (17) and (18) constrained to remain parallel by a cross member (21). Coulter wheels (30) and (31) secured to the frame members (17) and (18) are n...	03/17/1998
5695012	Adjustable subsoiler with staged shanks A deep subsoiler (50) consists of a plurality of carriages (58) abreast on a frame (52) and a plurality of shanks (60) mounted on each of said carriages. The mounting for each of said shanks provides a fail-safe mechanism consisting of a pair of rosettes ...	12/09/1997
5603380	Row following system for a row cultivator A row cultivator (10) includes a row following system (12) coupled to a toolbar (13) employing frame members (17) and (18) constrained to remain parallel by a cross member (21). Coulter wheels (30) and (31) secured to the frame members (17) and (18) are n...	02/18/1997
5560130	Excavation apparatus for attachment to the rear of a tractor A trenching apparatus for attachment to a three-point hitch on a tractor includes a bucket pivotally mounted on the lower end of a mounting post. The mounting post is held in position by a pair of spaced apart generally horizontal beams connected to a fra...	10/01/1996
5443126	Grubber tine The invention relates to a grubber tine of a tubular cross-section which, as compared to known grubber tines, give reduced weight and larger flexure and vibrations when moved through the soil, which gives reduced tractive power. The grubber tine is adapte...	08/22/1995
5409068	Dual penetration combination sweep with ripper An agricultural plow implement includes a number of upright supports, with each support supporting a shallow tillage V-shaped sweep blade. A mounting plate is attached to the rear of each upright support and a specially adapted ripper shank, with an attac...	04/25/1995
5195597	Shear pin assembly A soil penetrating tool assembly for mounting to a tool bar of a soil penetrating implement including a shank member which has an elongate body, a soil penetrating tool which is located on the first end of the body and a facing plate located on a second e...	03/23/1993
5191941	Suspension device for a plow In a plow, particularly a reversible plow, one has aimed at a plow enabling plowing in hard soil affording very heavy resistance against the plow bodies (2), using comparatively small material dimensions and corresponding light weight of the plow. For thi...	03/09/1993
5078217	Reversible plow A reversible plow comprising a three point hitch, a pivotally mounted tool bar provided with a plurality of adjustable plow gangs, and gauge wheels wherein said tool bar can be shifted from left of center to right of center, and back, by a hydraulic pisto...	01/07/1992
5076368	Reversible plow A reversible plow comprising a three point hitch, a pivotally mounted tool bar provided with a plurality of adjustable plow gangs, and gauge wheels wherein said tool bar can be shifted from left of center to right of center, and back, by a hydraulic pisto...	12/31/1991
5040616	Shank attachment A shank attachment device for holding either a deep-tilling ripper shank or a leveling finishing tool includes two vertical plates fixedly attached to a tool bar and adapted to sandwich a ground-working tool therebetween. A ripper shank holding assembly i...	08/20/1991
5000267	Reversible plow A reversible plow comprising a three point hitch, a pivotally mounted tool bar provided with a plurality of adjustable plow gangs, and gauge wheels wherein said tool bar can be shifted from left of center to right of center, and back, by a hydraulic pisto...	03/19/1991
4895211	Land clearing root plow and soil aerator A plow having a forwardly facing V-notched digger blade, lifting wings, side arms, frame members, ears for attaching a hitch and breakable attachment of the hitch to the tow vehicle is provided. In use the plow cuts or digs out subterranean plant roots, a...	01/23/1990
4825957	Breakaway mechanism for a row marker An improved breakaway assembly for preventing damage to markers for agricultural equipment when such markers encounter obstacles during use. The improved breakaway assembly includes an elongated member for holding the marker in place, imparting only tensi...	05/02/1989
4585073	Rotary disk tool assembly and implements An agricultural tool assembly (21) disclosed is usable on a variety of implements in place of shovels, blades, tines or sweeps and on novel cultivating or crop root undercutting implements and the like. Assembly (21) includes a rotary disk (23) mounted on...	04/29/1986
4418761	Adjustable tillage implement positioning apparatus A mounting/positioning apparatus for attaching an agricultural implement such as a reel unit or a rotary packer assembly to the frame of a tillage machine is disclosed. The apparatus includes two opposing end portions rigidly coupled together by means of ...	12/06/1983
4418760	Subsoil planar tool and shear bolt therefor A subsoil cultivating tool is sickel-shaped and planar with front and rear edges configured the same to facilitate manufacture. A plurality of such tools can be stamped or punched from a single sheet or plate and waste is minimized. The tool has an upper ...	12/06/1983
4339003	Soil cultivating implements An implement mounts a row of rotatable members, having resilient tines, that are rotatable about upwardly extending shafts. The frame portion is pivoted to a forward coupling member at several points, a lower one of which is a shear pin that allows the fr...	07/13/1982
4316510	Soil cultivating machine with interconnected pivoted members A soil cultivating machine has a beamed frame, and working members arranged in pairs. Two working members are mounted one behind the other, preferably on a common carrier beam which is releasably secured to transverse beams of the frame. Thus the two work...	02/23/1982
4316508	Automatic ripper reset mechanism The improved automatic ripper reset mechanism of the present invention includes a punch fixedly disposed on the distal free end of a ripper blade head for downward arcuate motion in response to the ripper blade striking an obstruction, a die having a matc...	02/23/1982
4262751	Tension failure trip for subsoil ripping shanks In an agricultural implement for use in ground breaking procedures including a frame adapted to be moved over the underlying terrain in a given direction, at least one ground breaking tool, a pivot connecting the tool to the frame for pivotal movement the...	04/21/1981
4231305	Soil cultivating machine A cultivating machine includes a forward row of subsoil tools and a plurality of elongated cultivating rollers having support plates to which soil penetrating T-section bars or knife edged bars are attached. To the rear of the cultivating rollers, a trail...	11/04/1980
4230054	Earth-working implement An earth-working implement and a method utilizing such an implement for preparing soil for planting seeds and concurrently planting the seeds wherein a plate-like plow stock penetrates the soil to a substantial depth below ground level, and the soil is co...	10/28/1980
4214635	Implement An implement mounts a plurality of working members through couplings, each coupling having a first member that can turn relative to a second member, upon overload. A shear pin normally prevents relative turning between the two members until overload and t...	07/29/1980
4210209	Agricultural implement An implement is connectable to the lifting hitch of a tractor and at least one rotary tool is driven to rotate about an upwardly extending axis. The tool or a trestle frame has an overload connection that allows the tool or frame to pivot to an inoperativ...	07/01/1980
4199031	Soil cultivating machines A cultivating machine has a row of soil working members rotatable about upwardly extending axes and each member includes a carrier from which tools detachably depend. The lower tool ends have blades that are adjustable and detachable from the remainder of...	04/22/1980
4183231	Rotary harrows A safety coupling between a driving coupling and a driven coupling has a shear pin operative connection that shears upon overload, allowing relative movement between the two couplings. The shear pin is urged to establish a second operative connection afte...	01/15/1980
4147305	Spray drawbar An extendible, collapsible spray drawbar device is disclosed comprising a triangular shaped frame structure adapted at the forward apex end for pivotal attachment to a prime mover and having wheels at the rear base end, transverse spray bar elements pivot...	04/03/1979
4079789	Earth working tool An earth-working tool has mounting means at one end for attachment of the tool to the frame of an agricultural implement, a tool blade down the forward edge of the tool and attachment means at the other end of the tool for securing a tool point. The mount...	03/21/1978
4057112	Subsoil plow A subsoil plow having a plurality of forwardly facing C-shaped plow teeth arranged on a rigid frame in a generally V-shaped array. Each plow tooth has an upper portion, a curved shank portion, and a bottom tip and is mounted on the frame by a so-called pi...	11/08/1977
4006917	Energy absorbing pull hook for construction vehicles A construction vehicle has a pull hook arrangement mounted on a rearward end of a frame thereof for towing purposes. Such arrangement comprises a pull hook and energy absorbing means normally secured between the frame and the pull hook and adapted to brea...	02/08/1977
3998276	Plow and earth fragmentation machine This invention relates to earth processing equipment and, more particularly, to a scarifier or plow apparatus capable of deep soil penetration which has an attached earth fragmentation assembly. The apparatus comprises a frame mounting on its forward end,...	12/21/1976
3985187	Two-way plow with carrying bracket therefor The plow carrying brackets are employed in pairs, each comprising a L-shaped shank pivotally mounted at one of their ends to the drawbar of a plow frame, the interior vertex of the shank engaging a rest which issues sidewardly from the drawbar and secured...	10/12/1976

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Class 172/271 - Frangible lock (e.g., shear pin, etc.)