Rotor bit removal device

Patent metadata

Field	Value
Publication number	US-11203103-B2
Application number	US-201815995420-A
Country	US
Kind code	B2
Filing date	Jun 1, 2018
Priority date	Jun 1, 2018
Publication date	Dec 21, 2021
Grant date	Dec 21, 2021

Abstract

A bit removal device may include a support, an extractor coupled to the support, and an actuator. The support is configured to engage a bit holder from a front side of the bit holder. The extractor is configured to engage a bit from the front side of the bit holder. The actuator is configured to move the extractor relative to the support to extract the bit from the bit holder.

First claim

What is claimed is:

1. A rotor bit removal device comprising:
a support configured to engage a bit holder of a paving machine rotor, wherein the support is configured to engage a neck portion of the bit holder from a front side of the bit holder;
an extractor coupled to the support, the extractor configured to engage a bit from the front side of the bit holder; and
an actuator configured to move the extractor relative to the support to extract the bit from the bit holder.

2. The bit removal device of claim 1 , wherein the extractor is configured to engage a washer or a collar of the bit.

3. The bit removal device of claim 1 , wherein the extractor includes an arcuate bracket configured to engage the bit behind a collar or washer of the bit.

4. The bit removal device of claim 1 , wherein the support includes an arcuate bracket for placement around the neck portion of the bit holder.

5. The bit removal device of claim 1 , further comprising:
a user interface, wherein the actuator is configured to receive a signal from the user interface to control movement of the extractor.

6. The bit removal device of claim 5 , wherein the user interface includes one or more triggers or buttons.

7. The bit removal device of claim 5 , further comprising:
a handle, wherein at least a portion of the user interface is positioned on the handle.

8. The bit removal device of claim 1 , wherein the actuator includes a hydraulic or electric power source.

9. The bit removal device of claim 1 , further comprising:
a leadscrew including a longitudinal axis, wherein the actuator is configured to cause the leadscrew to rotate, moving the extractor relative to the support in an axial direction along the longitudinal axis.

10. The bit removal device of claim 1 , wherein the extractor includes a pair of arms configured to be opened and closed.

11. The bit removal device of claim 10 , wherein the support includes a pair of arms configured to be opened and closed.

12. The bit removal device of claim 10 , wherein the support includes a sleeve that houses at least a portion of the extractor.

13. The bit removal device of claim 1 , wherein the extractor includes a lever configured to tilt such that an end of the lever engages further behind the bit.

14. The bit removal device of claim 1 , wherein the extractor includes a lever configured to engage the bit in a first position and to automatically move into a second position as the bit is removed.

15. The bit removal device of claim 14 , wherein a greater portion of the lever is in contact with the bit in the second position than in the first position.

16. A rotor bit removal system comprising:
an extractor configured to engage a bit from a front side of a bit holder of a paving machine rotor to extract the bit from the bit holder;
a support coupled to the extractor and including a pair of arms configured to be opened and closed to engage the bit holder to support the extractor as it extracts the bit from the bit holder;
an actuator configured to move the extractor relative to the support such that the support remains engaged with the bit holder while the extractor removes the bit from the bit holder.

17. The bit removal system of claim 16 , further comprising:
a connector configured to connect the actuator to a power source.

18. The bit removal system of claim 16 , wherein the actuator is a hydraulic actuator or an electric actuator.

19. A method of manufacturing a rotor bit removal device, the method comprising:
providing a support configured to engage a bit holder of a paving machine rotor, wherein the support is configured to engage a neck portion of the bit holder from a front side of the bit holder;
providing an extractor configured to engage a bit from the front side of the bit holder; and
coupling the support to the extractor with an actuator configured to move the extractor relative to the support to extract the bit from the bit holder.

20. The method of claim 19 , further comprising:
providing the actuator with a hydraulic or electric power source.

Assignees

• Caterpillar Paving Products Inc

Inventors

• Sansone Dario
• Persano Mario
• Ciardullo Danilo
• Magee Kevin J
• Virgi Prasad S
• Cesari Marco

Classifications

• E01C23/088

  Rotary tools, e.g. milling drums {(for forming recesses to receive marking materials E01C23/0946)} · CPC title

• B25B27/10

  inserting fittings into hoses · CPC title

• E21C35/188

  characterised by adaptations to use an extraction tool · CPC title

• B25B27/026 Primary

  fluid driven · CPC title

• B23P19/00

  Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation {(connecting metal parts or objects by metal-working procedures B21J, B23K)}; Tools or devices therefor so far as not provided for in other classes (hand tools in general B25) · CPC title