U.S. patents available from 1976 to present.
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Patent No. 5823572

Self Defense Weapon With Memo

A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.

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Class 172/266 - Including toggle linkage


Subclass of Class 172 - Earth working
Definition: Apparatus including two links pivoted to one another, one
No. of patents: 23
Last issue date: 10/11/2005


NumberTitleIssue Date
6952998Minimum till seeding knife
The present invention relates to a knife for and a method of zero till or minimum till seeding and fertilizing. The knife is particularly adpated for dray land conditions producing minimum soil disturbance and very shallow operation. The knife has a high penetration...
10/11/2005
6926093Mechanism for mounting a soil leveling device
A mechanism for mounting a soil leveling device to the mounting arm of a leveling attachment operates in either a fixed setting or a floating setting. The mechanism includes a rearwardly extending carrier arm which carries the soil leveling device at its distal end....
08/09/2005
5605196Multi-piece subsoiler unit for an agricultural implement
An agricultural implement that includes a plurality of ground penetrating units for shattering the hard pan in a relatively wide pattern as the implement is drawn across the field while causing minimum disturbance to the top surface of the ground. Each gr...
02/25/1997
5560433Dual action earth working implement
An earth working implement including a frame having at least one earth working tool mounted thereon. A spring biased linkage assembly connects the tool to the frame to allow for vertical "floating" and "tripping" movements of the tool. The linkage assembl...
10/01/1996
5398770Cultivator
A chisel cultivator for post-planting cultivation. The cultivator includes a main frame. A chisel member has one end portion coupled to the frame and a second end portion spaced from the first end portion along a longitudinal axis of the chisel member for...
03/21/1995
5333694Strip-till seed bed preparation apparatus
Seed bed preparation apparatus for the no-till preparation of longitudinal strips of soil for the planting of seeds in longitudinal rows including plurality of laterally spaced apart gang assemblies which are individually mounted on a draft vehicle such a...
08/02/1994
5072793Trip assembly
A trip assembly for a ground-working implement includes a rigid toggle member and a spring toggle member that are pinned, respectively, at a first point to a ground-engaging tool and at a second point to a frame. The rigid toggle member and the spring tog...
12/17/1991
4865132Tillage implement having independent depth control mechanism
A tillage implement is provided which is of the type that has a plurality of working components that perform a multiple number of different soil treatment operations during a single trip across an agricultural field. One of these working components is a d...
09/12/1989
4609051Trip shank mechanism
A trip shank mechanism including a tool bar, an upper support member fixedly attached to the upper side of the tool bar, a lower support member fixedly attached to the lower side of the tool bar and a bracket pivotally connected to the lower support membe...
09/02/1986
4580507Drill for applying seed and fertilizer
A drill for applying seed and fertilizer, with a frame, reservoirs, sowing shares with at least two separate inlets for seed and fertilizer, and a depth-adjustment or pressure roller mounted behind each share, in which the materials to be applied are conv...
04/08/1986
4532790Spring-loaded ground engaging tool
A ground working assembly has an inclined arm swingable up and down on a tool bar of an agricultural implement, the assembly being yieldably biased downwardly by a cushioning spring associated with a bracket which mounts the assembly on the tool bar. A to...
08/06/1985
4519461Two-way plow with offset trips
A plow that has a plurality of equally spaced right hand plows and left hand plows that are mounted one above the other on a beam of the plow support structure. Each right hand plow has trip linkage that is offset from the trip linkage of the left hand pl...
05/28/1985
4452317Trip mechanism
A trip mechanism for a ground working tool connected to a frame. The frame is connected to a carriage using a three point connection. A pivotal member is provided in the frame and a tension member is connected between one arm of the pivotal member and the...
06/05/1984
4318524Bent bolt clamp
A bent bolt clamping arrangement for clamping a mechanism to a beam of rectangular cross-section. Three beam engaging elements lying substantially in a plane are arranged to form a U-shaped configuration to snugly fit three faces of the beam. One of the e...
03/09/1982
4312407Spring trip mechanism for plows
A trip mechanism 41 for a plow standard 11 includes a pair of toggle links 46, 61 having their remote ends pivotally connected, respectively, to a plow frame 15 and the standard 11. Link 61 includes a leaf spring 63 with a rolled end 86 pivotally connecte...
01/26/1982
4249615Two-stage trip release shank assembly
An implement shank is pivotally attached to the frame of the implement and normally is maintained in the soil by a heavy duty coil spring reacting between the shank and a support extending from the frame. The spring mount and shank holder are connected to...
02/10/1981
4236583Toggle link trip and reset mechanism for earthworking tool
A moldboard plow bottom unit having a frame mount on a beam. A standard attached to a moldboard plow bottom is pivotally connected to the frame to provide movement of the moldboard plow bottom from a normal earthworking position to an elevated trip positi...
12/02/1980
4161986Plow and plow mounting bracket therefor
A plow mounting bracket for variable width plows including a mounting post having a free end that extends upwardly from a hub portion and is pivotally received by the plow main frame. The plow bracket can be used for plows that are secured at selected wid...
07/24/1979
4128130Tool support
An earthworking tool suspension system composed of a pair of vertically disposed and fore-and-aft extending four bar linkages in which the coupler link of the front linkage is the base link of the rear linkage, the tool standard has an upper part that is ...
12/05/1978
4116280Spring reset mechanism
A safety trip mechanism for a ground working tool utilizes a roller pin engageable with a notched and spring biased latch to resist collapse of a toggle linkage and rotation of the tool supporting standard as obstacles are encountered by the tool. The rol...
09/26/1978
4102404Articulated cultivator
A cultivator section comprises an articulated frame supported by castor wheels and having both hinge connections and universal ball joint connections so that the frame can articulate when transversing uneven ground, gullies, etc. and maintaining the culti...
07/25/1978
4040491Automatic reset plow
A linkage assembly supports a moldboard plow. A cam member having a seat engaging a roller is pivotally connected to the linkage assembly. A spring assembly is pivotally connected between the cam member and the linkage assembly to urge the plow in a norma...
08/09/1977
3972374Trip mechanism for ground working implement
A spring bias safety trip mechanism for holding a ground working tool in a fixed position with respect to a support frame is disclosed herein. The spring bias safety trip mechanism consists of a plurality of links that are interconnected in such a manner ...
08/03/1976
 
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