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US 4,226,322 AGranted
Machine tool guard door assembly
AssigneeHardinge Brothers, Inc.
InventorJohn M. Peris
Life of this patent
Estimating the term…
Abstract
An automatic programmed machine tool having guard doors is shut down by an interlock system whenever a guard door is opened.
Claims8
A guard door assembly for a machine tool, comprising-
- (a) a support on which a headstock assembly and machine tool turret assembly are mounted and including two spaced horizontal support rods along the front and rear top surface of the support, at least one of which has a central pneumatic passage and is connected to a pneumatic source
- (b) a plurality of transparent movable guard doors slidably mounted on the support rods and enclosing the headstock and machine tool turret assemblies
- (c) operating means for operating the machine tool
- (d) sensing means for sensing when the guard doors are opened
- (e) deactivating means associated with the sensing means for automatically deactivating the operating means when the guard doors are opened, and
- (f) the sensing means having an element which pneumatically co-acts with one of the support rods and which is both inaccessible to the operator and gives no outward appearance of its function.
3 more elements
A machine tool guard door sensing assembly, comprising:
- (a) a machine tool having a plurality of horizontally movable guard doors
- (b) an elongated rod having a through central passage which is disposed parallel to the line of movement of the slidable guard doors
- (c) a single sleeve member associated with each guard door and individually movable therewith
- (d) each of the sleeve members being disposed on the activating rod member, and
- (e) a port on the rod connected to the central passage and disposed so as to be covered by a sleeve member when that sleeve member is disposed in the closed position for its guard door.
2 more elements
Dependencies are inferred from the claim text.