Cutting tool for flexible plastic conduit

• US 4,336,652 A
• Filed: 08/01/1980
• Issued: 06/29/1982
• Est. Priority Date: 08/01/1980
• Status: Expired due to Term

• Current Assignee: Duane D. Robertson
• Original Assignee: Duane D. Robertson
• Inventors: Robertson, Duane D.
• Primary Examiner(s): Kunin, Stephen G.
• Assistant Examiner(s): Zatarga, J. T.
• Application Number:
  US06/174,727
• Time in Patent Office: 697 Days
• Field of Search: 30/90.1, 30/258, 30/250, 30/252, 30/92, 30/341
• US Class Current: 30/258
• CPC Class Codes: B26B 13/00 Hand shears; Scissors
• CPC Class Codes: B26D 3/169 Hand held tube cutters

Abstract

A cutting tool for cutting flexible plastic conduit, formed by a pair of handled jaws pivotally connected intermediate their ends. One jaw is box shaped in cross-section and forms a handle which supports a knife blade, which has a longitudinal cutting edge. The other jaw is generally channel-shaped in cross-section and forms a handle with a semi-circular concave anvil at one end. The anvil has an axially extending slot therein for receiving the cutting edge of the knife blade when the handles are closed together with the box-shaped handle nested within the channel-shaped handle. A conduit supported in the semi-circular anvil is cut by the knife blade as the handles are squeezed together.

Claims

1. A cutting tool for cutting flexible plastic conduit comprising a pair of handled jaws pivotally connected intermediate their ends, one of said jaws having a handle at one end and a knife blade extending from the other end thereof opposite to said handle, said knife blade having a longitudinal cutting edge, the other of said jaws defining a channel-shaped handle at one end and a semi-circular concave anvil at the other end, said anvil having an axially extending slot therein for receiving the cutting edge of said knife blade when said handles are closed together with the said one handle nested within said channel-shaped handle, whereby a conduit supported in said semi-circular anvil can be cut readily by said knife blade upon squeezing said handles together while swinging said tool relative to said conduit and said conduit being completely severed as said knife blade edge is received in said slot.

2. A cutting tool for cutting flexible plastic conduit comprising a pair of handled jaws pivotally connected intermediate their ends, one of said jaws being generally box shaped in cross-section and having a handle at one end and a knife blade extending from the other end thereof opposite to said handle, said knife blade having a longitudinal cutting edge, the other of said jaws being generally channel shaped in cross-section and defining a handle at one end and a semi-circular concave anvil at the other end, said anvil having an axially extending slot therein for receiving the cutting edge of said knife blade when said handles are closed together with said box-shaped handle nested within said channel-shaped handle, whereby a conduit supported in said semi-circular anvil can be cut by said knife blade upon squeezing said handles together while swinging said tool relative to said conduit and said conduit being completely severed as said knife blade edge is received in said slot.

3. A cutting tool for cutting flexible plastic conduit comprising a pair of handled jaws pivotally connected intermediate their ends, one of said jaws being generally box shaped in cross-section and having a handle at one end and a knife blade extending from the other end thereof opposite to said handle, said knife blade having a longitudinal cutting edge, the other of said jaws being generally channel shaped in cross-section and defining a handle at one end and a semi-circular concave anvil at the other end, said anvil having an axially extending slot therein for receiving the cutting edge of said knife blade when the handles are closed together with said box-shaped handle nested within said channel-shaped handle, reinforcing ribs within the anvil section of said channel on each side of said knife receiving slot for stiffening said anvil section adjacent thereto, and said slot having an enlarged opening at the end thereof opposite the corresponding handle to accommodate flexing of said knife blade, whereby a conduit supported in said semi-circular anvil can be cut by said knife blade upon squeezing said handles together while swinging said tool relative to said conduit and said conduit being completely severed as said knife blade edge is received in said slot.

4. A cutting tool for cutting flexible plastic conduit comprising a pair of handled jaws pivotally connected intermediate their ends, one of said jaws being generally box shaped in cross-section and having a handle at one end and a knife blade removably mounted thereon and extending from the other end thereof opposite to said handle, said knife blade having a longitudinal, sharpened cutting edge, the other of said jaws being generally channel-shaped in cross-section and defining a handle at one end and a semi-circular concave anvil at the other end, said jaw having an aperture therein for receiving the knife end of said one jaw when said jaws are pivoted together, said anvil having an axially extending slot therein for receiving the cutting edge of the knife blade when said handles are closed together with said box-shaped handle nested within said channel-shaped handle, reinforcing ribs within the anvil section of said channel on each side of said knife receiving slot for stiffening the anvil section adjacent thereto, and said slot having an enlarged opening at the end thereof opposite the corresponding handle to accommodate flexing of said knife blade, whereby a conduit supported in said semi-circular anvil can be cut by said knife blade upon squeezing said handles together while swinging said tool relative to said conduit and said conduit being completely severed as said knife blade edge is received in said slot.

5. A cutting tool for cutting flexible plastic conduit comprising a pair of handled jaws pivotally connected intermediate their ends, one of said jaws being generally box-shaped in cross-section and having a handle at one end and a knife blade removably mounted thereon and extending from the other end thereof opposite to said handle, said knife blade having a longitudinal, sharpened cutting edge, said box-shaped handle comprising a generally channel-shaped member having a top panel and depending side walls, a plurality of slotted webs joining said walls and top panel, and a cover plate spanning said walls in spaced relationship to said top panel to form an enclosed box structure, said cover plate having a plurality of pins engageable with said slotted webs to secure said cover plate to said channel member, the other of said jaws being generally channel-shaped in cross-section and defining a handle at one end and a semi-circular concave anvil at the other end, said jaw having an aperture therein for receiving the knife end of said one jaw when said jaws are pivoted together, said anvil having an axially extending slot therein for receiving the cutting edge of the knife blade when said handles are closed together with said box-shaped handle nested within said channel-shaped handle, reinforcing ribs within the anvil section of said channel on each side of said knife receiving slot for stiffening the anvil section adjacent thereto, and said slot having an enlarged opening at the end thereof opposite the corresponding handle to accommodate flexing of said knife blade, whereby a conduit supported in said semi-circular anvil can be cut by said knife blade upon squeezing said handles together while swinging said tool relative to said conduit and said conduit being completely severed as said knife blade edge is received in said slot.

6. A cutting tool for cutting flexible plastic conduit comprising a pair of handled jaws pivotally connected intermediate their ends, one of said jaws being generally box-shaped in cross-section and having a handle at one end and knife blade removably mounted thereon and extending from the other end thereof opposite to said handle, said knife blade having a longitudinal, sharpened cutting edge, said box-shaped handle comprising a generally channel-shaped member having a top panel and depending side walls, a plurality of slotted webs joining said walls and top panel, a pair of spaced internal panels intermediate and parallel with said depending side walls adjacent the knife end of said handle and defining with each other a knife blade supporting slot and defining with said side walls a pair of elongated sockets, and a cover plate spanning said walls in spaced relationship to said top panel to form an enclosed box structure, said cover plate having a plurality of pins engageable with said slotted webs to secure said cover plate to said channel and having a pair of spaced ribs adapted to be snugly received within said elongated sockets, the other of said jaws being generally channel-shaped in cross-section and defining a handle at one end and a semi-circular concave anvil at the other end, said jaw having an aperture therein for receiving the knife end of said one jaw when said jaws are pivoted together, said anvil having an axially extending slot therein for receiving the cutting edge of the knife blade when said handles are closed together with said box-shaped handle nested within said channel-shaped handle, reinforcing ribs within the anvil section of said channel on each side of said knife receiving slot for stiffening the anvil section adjacent thereto, and said slot having an enlarged opening at the end thereof opposite the corresponding handle to accommodate flexing of said knife blade, whereby a conduit supported in said semi-circular anvil can be cut by said knife blade upon squeezing said handles together while swinging said tool relative to said conduit and said conduit being completely severed as said knife blade edge is received in said slot.

7. A cutting tool for cutting flexible plastic conduit comprising a pair of handled jaws pivotally connected intermediate their ends, one of said jaws having a handle at one end and a knife blade extending from the other end thereof opposite to said handle, said knife blade having a longitudinal cutting edge, the other of said jaws defining a handle at one end and a semi-circular concave anvil at the other end, said anvil having an axially extending slot therein for receiving the cutting edge of the knife blade when the handles are closed together, said slot having an enlarged opening at the end thereof opposite the corresponding handle to accommodate flexing of the knife blade, whereby a conduit supported in said semi-circular handle can be cut by said knife blade upon squeezing said handles together while swinging said shears relative to said conduit and said conduit being completely severed as said knife blade edge is received in said slot.