Granted Patent B2

US 12,605,858 · App. 18/453,948 · Granted Apr 21, 2026

Inventors: Frank Lülfing (Wietze, DE); Viatcheslav Maik Seibel (Bremen, DE)

Assignee: SafeWorks, LLC

B26D1/08B26D3/003B26D5/02

Abstract

Claims (32)

1 . A portable belt cutting device, comprising:

a cutting head;

a cutting blade configured to cut a belt, the cutting blade including an integrally-formed blade connecting element with the cutting blade configured to be moveably arranged on the cutting head and supported by the cutting head such that the cutting blade is moveable between a retracted position and an extended position;

a cutting base, the cutting head coupled to the cutting base, the cutting base including two walls and a bottom portion defining an aperture to receive the belt; and

a locking unit for securing the cutting head to the cutting base;

wherein the cutting head comprises a drive spindle for moving the cutting blade from the retracted position to the extended position toward and in contact with the bottom portion, the drive spindle comprises a drive spindle connecting element integrally formed at an end portion of the drive spindle, and the drive spindle connecting element is rotatable with, and directly coupled to, the cutting blade connecting element;

wherein after removal of the cutting base, the cutting blade is removable from the drive spindle without the aid of additional parts;

wherein in the retracted position a gap is defined between at least one of the two walls and the cutting blade, and in the extended position the cutting blade is configured to interface with the two walls; and

wherein removing the locking unit enables the cutting head to pivot with respect to the cutting base.

2 . The cutting device of claim 1 , wherein:

the drive spindle engages a thread formed in the cutting head, the drive spindle being bi-directionally moveable relative to said thread,

the end portion of the drive spindle is a first end portion, and

the drive spindle comprises a second end portion opposite of the first end portion, the second end portion comprising a torque input geometry.

3 . The cutting device of claim 2 , wherein the torque input geometry is formed as a polygonal recess or a polygonal projection, said recess or said projection configured to accept correspondingly shaped male or female tools for applying torque, in both rotational directions.

4 . The cutting device of claim 2 , wherein the torque input geometry is formed as a male or a female hexalobular pattern.

5 . The cutting device of claim 1 , wherein the locking unit comprises a locking pin mounted to the cutting base, and the cutting head comprises a recess, said recess being dimensioned to except the locking pin when in the closed position.

6 . The cutting device of claim 1 , further comprising a handle portion mounted to the cutting base.

7 . The cutting device of claim 1 , wherein the cutting blade comprises at least one cutting edge, said cutting edge being oriented non perpendicularly to the direction of movement of the cutting blade between the retracted position and the extended position.

8 . The cutting device of claim 7 , wherein the cutting blade comprises a first blade section and a second blade section, the first and second blade sections being angled oppositely to one another;

wherein the cutting blade comprises a first lateral side and a second lateral side opposite the first lateral side, and a center portion extending between the first and second lateral sides, and

wherein the first and second blade sections project further towards the extended position at the lateral sides than in the center portion such that upon contact between belt and blade, the belt is cut from its periphery towards its center.

9 . The cutting device of claim 1 , wherein the cutting head comprises a cutting head body extending between a first end and a second end, the first end of the cutting head body coupled to one of the walls, the second end of the cutting head body offset from the two walls.

10 . The cutting device of claim 1 , wherein one of the walls includes a first end defining a first width and a second end defining a second width, the second width greater than the first width, the second end configured to interface with the cutting blade in the extended position, the gap defined between the first end and the cutting blade in the retracted position.

11 . A portable belt cutting device, comprising:

a cutting head;

a cutting blade configured to cut a belt, the cutting blade including an integrally-formed blade connecting element with the cutting blade configured to be moveably arranged on the cutting head and supported by the cutting head such that the cutting blade is moveable between a retracted position and an extended position;

a cutting base, the cutting head coupled to the cutting base, the cutting base including a first wall, a second wall, and a bottom portion defining an aperture to receive the belt; and

a locking unit for securing the cutting head to the cutting base, the first wall located closer to the locking unit than the second wall;

wherein the cutting head comprises a drive spindle for moving the cutting blade from the retracted position to the extended position toward and in contact with the bottom portion,

wherein the coupling between the cutting blade and the drive spindle is only two parts,

wherein in the retracted position a gap is defined between at least one of the two walls and the cutting blade and the cutting blade is enabled to move with respect to the two walls, and in the extended position the cutting blade is configured to interface with the two walls, and

wherein the cutting head is pivotably mounted to the cutting base, and the gap enables the cutting head to pivot when the locking unit is removed.

Assignments (3)

Continuity (3)

References Cited (55)