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Sheath and conductor strippers

[Category : - Tools]
[Viewed 1358 times]

The sheath and conductor strippers embodiments relate to primarily ergonomic handle assemblies with upper and lower jaw portions lateral to the jaw-arms and handle-members. The elongated handle-members can be straight (13, 14), off-set T (27), and pistol grip (15, 21, 23) in configuration. The handle assembly is hinged (72, 74) with lateral limiting motion. The handle-members are resiliently urged and have a push-button latch assembly (39). The hand tools manually engaging jaw portions cut wire, strip insulation, slit sheathing, grasp, and crimp. The jaw engaging portions arranged for specific tasks processes.
The cutting blade and cutting disk (186) can be either fixed position or adjustable blade carriage (68,70, 126) depending on the configuration of the cutting blade casing (140,170,172) and blade covers (37, 53) for cutting sheathing placed in an integral passageway (31,32,88) with various tongue attachments (16), passageway adaptors (104, 106), and sheath cutting slots (140). An alternative embodiment is an ergonomic crossed handle wire stripper (25) where the handle-members rotate longitudinal, with the upper and lower jaws lateral to the handle-members in engaging the work-piece. The jaw-members have wire cutting edges, conductor stripping slots, a cutting blade casing (148), sheath cutting slots (182), and adjustable stepped guides (174, 184). The cross handle wire stripper is leaf spring (152) urged, has a swivel latch (154), and handles with ergonomic contours (164).
A utility knife with a blade guard (212) having a friction blade guide (220) and coil spring (226) another device.


Financial information

Most safety cutters don’t consider over strike. A tendon cut in a runaway strike is medically expensive. With an estimate of a $6-$7 wholesale price: injury vs. cost benefit. With 97% of businesses having less than 50 employees. The expense would not be burdensome.

The Guard Knives ™are niche products. The shop drawing pattern shows the simplicity in design and assembly.

__ The safety knives’ features are a blade guard, and a non-retracting blade.
__ An integral friction insert requires one less assembly step.
__ The blade guard tip can be modified for curved conductor sheathing or a flange attached to gauge cutting the top off boxes. As designed… ideal for cutting carpet?
__ The razor version is an expensive box cutter... injury vs. cost benefit.
__ An X acto version might not be practical.
__ In contacting retailers inquiring if the safety knives are in the best interest of employees. I got the runaround.
Workmen comp and emergency room visit utility knife injury statistics are murky.

Most safety cutters, in my opinion, don’t consider over strike. A tendon cut in a runaway strike is medically expensive. With an estimate of a $6-$7 wholesale price: injury vs. cost benefit. With 97% of businesses having less than 50 employees. Of which only a few use a utility knife, the expense would not be to burdensome.

The safety cutter is ideal in repetitive scoring jobs such as sheet rocking, roofing, box cutting, etc. saving time retracting the blade.


Been notified by the “Office” the patent is expired. The situation is unintentional.











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