Non-removeable safety pin

a safety pin and non-removable technology, applied in the direction of key-type connections, soil-shifting machines/dredgers, fastening means, etc., can solve the problems of presenting a significant health and safety risk both to the operator and those around the excavators, and many operators forgetting to remove and then lose the pin. , the effect of reducing the chance of an operator removing and then losing the pin

Inactive Publication Date: 2011-09-22
MILLER UK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The safety pin design significantly reduces the likelihood of operators forgetting or losing the safety pin, as it is securely locked in place and visible in its non-safe position, enhancing operator safety and preventing accidental disengagement of latching hooks.

Problems solved by technology

However, because the safety pin has to be inserted manually, in practice it is found that many excavator operators either forget to use it or simply refuse to use it.
This presents a significant health and safety risk both to the operator and to those around the excavator.

Method used

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  • Non-removeable safety pin
  • Non-removeable safety pin
  • Non-removeable safety pin

Examples

Experimental program
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Effect test

second embodiment

[0081]Referring now to FIGS. 3, 4 and 5, safety pin 20 is shown. It also comprises a head 26, a shaft 24 and a distal end 22. Further, the distal end has a transverse hole 30 therethrough for a lynch pin or R-clip. However, in this embodiment, the head 26 is removable from the shaft 24.

[0082]The head 26 is a bolt 46 with an integral washer 48 and an integral shaft (not shown) that is screwed into the shaft 24 of the safety pin 20.

[0083]The distal end 22 is integrally formed as a single piece with the shaft 24. It has the transverse hole 30 drilled therethrough. However, the distal end 22, instead of being cylindrical, is now flattened. For example, it may be stamped to form two flat faces and two transversely extending sides. The two transversely extending sides extend radially outward relative to the shaft 24.

[0084]The shaft is cylindrical along its length.

first embodiment

[0085]As shown in FIGS. 4 and 5, and similar to the first embodiment, the safety pin 20 is provided in a coupler 10 and it extends between two holes 36 in the side plates 38 of the coupler. However, the hole 36 is provided with a boss 54. The boss 54 provides a flat surface for the washer 48 to rest against. Further, it makes the side plate's thickness T thicker at that point by the depth D of the boss 54, as shown in FIG. 6. The additional thickness provides for a larger space for housing the distal end 22 of the safety pin 20 upon retracting the safety pin 20 into the non-safe position. Therefore, as before, prior to accessory release (or coupling), the safety pin is pulled from the coupler until it is retracted into the designed housing within the coupler frame to avoid any interference with the internal operating components of the coupler.

[0086]The housing 58 comprises a mortise that is centred over the first hole 36. It is larger in width than the hole—the housing receives the ...

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Abstract

A non-removable safety pin (20) for an excavator coupler for securing a latching hook thereof. The safety pin (20) comprises a head (26), a shaft (24), a distal end (22) and a longitudinal axis starting at the head (26), extending along the shaft (24) and terminating at the distal end (22), wherein either or both of the shaft (24) and the distal end (22) are keyed so as to have an element thereon that extends relative to a side of the shaft. The element prevents removal of the safety pin from a hole (36) in which the safety pin (20) is inserted.

Description

RELATED APPLICATION[0001]This application is a divisional of U.S. patent application Ser. No. 11 / 349,491 filed Feb. 7, 2006, which is hereby incorporated by reference. This application is related to U.K. Design Patent Application GB3022197, filed Aug. 17, 2005.FIELD OF INVENTION[0002]The present invention relates to a non-removable safety pin, for example for use to secure the engagement of pivoting or sliding latching hooks, or other moving elements, in a bucket or accessory coupler for an excavator. Such couplers may be for coupling a bucket, or some other accessory, to an excavator arm of an excavator.BACKGROUND[0003]It is well known in the art of excavators to provide a coupler between an end of an excavator arm of the excavator and an accessory for that excavator, such as digging buckets for that excavator. Couplers are generally mounted to the arm of the excavator with coupler pins. Then, for coupling a bucket thereto, at the bottom of the coupler, a fixed pair of hooks and ei...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): F16B3/00
CPCE02F3/3604E02F3/3609Y10T403/581Y10T403/7026Y10T403/598Y10T403/32893Y10T292/1028F16B2200/69
InventorMILLER, GARY
OwnerMILLER UK