US 12,202,056 B2
Drill for drilling railway sleepers
Gualtiero Barezzani, Brescia (IT); and Michele Orizio, Brescia (IT)
Assigned to Cembre S.p.A., Brescia (IT)
Appl. No. 17/047,983
Filed by Cembre S.p.A., Brescia (IT)
PCT Filed Apr. 17, 2019, PCT No. PCT/IB2019/053182
§ 371(c)(1), (2) Date Oct. 15, 2020,
PCT Pub. No. WO2019/207424, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 102018000004792 (IT), filed on Apr. 23, 2018.
Prior Publication US 2021/0170501 A1, Jun. 10, 2021
Int. Cl. E01B 31/24 (2006.01); B23B 45/00 (2006.01); B25F 5/02 (2006.01); E01B 31/06 (2006.01)
CPC B23B 45/001 (2013.01) [B25F 5/02 (2013.01); E01B 31/06 (2013.01); E01B 31/24 (2013.01); B23B 2260/024 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A drill for drilling railway sleepers, comprising:
a support structure,
a motor assembly supported by the support structure,
a handle connected to the support structure,
at least one control member arranged on the handle for operating the motor,
a spindle supported by the support structure and operable by the motor to rotate about a spindle axis,
a protective casing connected to the support structure and surrounding both the spindle and a drilling tip coupled to said spindle, said protective casing comprising a movable casing portion sliding in the direction of the spindle axis between an axially protracted position, in which it envelops the tip, and an axially retracted position, in which the tip protrudes out from the protective casing,
wherein:
the handle comprises two gripping portions for the two hands of the user, located on two diametrically opposite sides of the drill with respect to the spindle axis, the two gripping portions each having a free end, and
the motor assembly comprises an electric motor, which can be powered by a rechargeable and replaceable battery; and
wherein the drill further comprises:
a lighting system with two light sources arranged at the free ends of the gripping portions facing away from the user in a use position of the drill, the two light sources being spaced apart from each other and arranged on two opposite sides with respect to a hypothetical work plane containing the spindle axis, wherein optical axes of two light cones generated by the light sources mutually converge in an axial direction towards the tip and converge together towards the spindle axis from a side of the drill opposite the user, forming two illuminated fields overlapping at least in a drilling region of the drill, wherein said overlapping of the two illuminated fields axially extends along a complete stroke of a free end of the movable casing portion between the protracted position and the retracted position.