US 12,214,354 B2
Restraining of service access to HSI crusher chamber
Juhamatti Heikkilä, Tampere (FI); and Marko Lamminmäki, Tampere (FI)
Assigned to Metso Finland Oy, Espoo (FI)
Appl. No. 17/909,008
Filed by Metso Outotec Finland Oy, Tampere (FI)
PCT Filed Feb. 25, 2021, PCT No. PCT/FI2021/050137
§ 371(c)(1), (2) Date Sep. 2, 2022,
PCT Pub. No. WO2021/176136, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 20205243 (FI), filed on Mar. 6, 2020.
Prior Publication US 2023/0092458 A1, Mar. 23, 2023
Int. Cl. B02C 13/31 (2006.01); B02C 13/02 (2006.01); B02C 13/26 (2006.01)
CPC B02C 13/31 (2013.01) [B02C 13/02 (2013.01); B02C 13/26 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A restraining apparatus for a horizontal shaft crusher that comprises a crushing chamber and a service hatch for opening and closing a service entry to the crushing chamber, the restraining apparatus comprising:
a first restraint movable along a first free trajectory between a blocking state and an access state in which the first restraint respectively restrains and allows opening of the service hatch; and
a second restraint movable along a second free trajectory between a running state and a control state, the second restraint comprising an engagement member;
wherein when the second restraint is in the control state, the engagement member is in a use position for restraining rotation of the horizontal shaft;
wherein when the second restraint is in the running state, the engagement member is in an idle position for not restraining the rotation of the horizontal shaft;
wherein the first and second restraints are collectively configured to:
prevent moving the first restraint from the blocking state to the access state if the second restraint is in the running state;
prevent moving the second restraint from the control state to the running state if the first restraint is in the access state;
allow moving the first restraint from the access state to the blocking state; and
allow moving the second restraint from the running state to the control state,
wherein the first restraint is configured to block the second free trajectory unless the first restraint is in the blocking state.