Lift truck safety mirror

• US 4,441,790 A
• Filed: 08/07/1981
• Issued: 04/10/1984
• Est. Priority Date: 08/07/1981
• Status: Expired due to Term

• Current Assignee: Gulf Research and Development Company
• Original Assignee: Gulf Research and Development Company
• Inventors: Williams, David M., Curtis, Charles L.
• Primary Examiner(s): Evans, F. L.
• Application Number:
  US06/290,853
• Time in Patent Office: 977 Days
• Field of Search: 350/289, 350/301, 350/302, 350/307
• US Class Current: 359/841
• CPC Class Codes: B60R 1/10 Front-view mirror arrangements; specially adapted for covering the peripheral part of the vehicle B60R1/002; Periscope arrangements , i.e. optical devices using combinations of mirrors, lenses, prisms or the like specially adapted for covering the peripheral part of the vehicle B60R1/002; for viewing traffic-lights B60R1/005; Other mirror arrangements giving a view from above or under the vehicle
• CPC Class Codes: B66F 9/07504 Accessories, e.g. for towing, charging, locking

Abstract

An over the load viewing system for lift trucks and the like, includes a first mirror fixed in position in the line of sight of the vehicle operator with a second mirror pivotally mounted on arms extending above the vehicle and moveable on the arms between a viewing position and retractable to a non-viewing position with latch means for latching the second mirror assembly in the viewing position and uni-directional drive means for rotating the mirror to the viewing position.

Claims

1. An overload viewing system for a fork lift truck type cargo handling vehicle for viewing forwardly over a forward positioned load, said viewing system comprising:

a first mirror in the line of sight of the vehicle operator,

a pivoting arm assembly, and a second mirror mounted on said pivoting arm assembly above said first mirror for pivotal movement between a viewing position to establish a line of sight from the operator via said first mirror and said second mirror forwardly over a normal forward positioned load of said vehicle, and a retracted position to permit passage of the vehicle beneath a low clearance.

2. The viewing system of claim 1 wherein said pivoting arm assembly includes a shaft mounted for rotation about a horizontal axis,

a pair of spaced apart mirror support arms secured at an inner end and extending radially outward from said shaft, and said mirror is mounted at the outer end of said arms, and said arms are pivotal on said shaft between a vertically extending position and a horizontally extending position.

3. The viewing system of claim 2 including detent means for releasably retaining said mirror support arms in said vertically extending position for retaining said second mirror in said viewing position.

4. The viewing system of claim 3 including unidirectional drive means for moving said mirror support arms to the vertical position for moving said second mirror into the viewing position.

5. The viewing system of claim 4 wherein said drive means includes a hand actuated lever movable from a retracted position to an extended position for moving said mirror support arms to said vertical position;

and

biasing means for normally biasing said lever arm to said retracted position.

6. The viewing system of claim 2 wherein said second mirror is mounted in a shielded position between said arms and aft of the front surface thereof.

7. The viewing system of claim 1 wherein said second mirror is moveable to said retracted position in response to an external force.

8. The viewing system of claim 5 wherein said detent means includes a detent arm secured to and extending radially outward from said shaft, and a spring biased friction member for frictional engagement of said detent arm when said mirror support arms are in the vertical position.

9. The viewing system of claim 8 wherein said drive means includes a first gear driven by said hand lever, and a second gear driven by said first gear and including lug means for unidirectional engagement and movement of said detent arm.

10. The viewing system of claim 9 wherein said second mirror is mounted in a shielded position between said arms and aft of the front surface thereof.

11. The viewing system of claim 12 wherein said second mirror is moveable to said retracted position in response to an external force.