GB2171141A

GB2171141A - Lifting hook

Info

Publication number: GB2171141A
Application number: GB08502969A
Authority: GB
Inventors: Raymond Walter Oliver; Joseph Guest
Original assignee: SHAREBEX WILLETTS Ltd
Current assignee: SHAREBEX WILLETTS Ltd
Priority date: 1985-02-06
Filing date: 1985-02-06
Publication date: 1986-08-20
Also published as: GB8502967D0

Abstract

A lifting hook to provide a releasable connection between an object to be lifted and a lifting means, comprises a body (11) having an attachment means (17) at the, in use, upper end (16) thereof for connection to a lifting means, and a connector member (23) such as a pin, at the, in use, lower end thereof which extends transversely of a longitudinal axis of the body (11) extending between said ends, and having a free end (25), a hand- engageable member (30) slidably mounted on the body (11) for reciprocation longitudinally of the body (11), an obturating member (33) connected to the hand-engageable member (30) and movable therewith between a "closed position" which it occupies when the hand-engageable member (30) is in its lowermost position, and in which position access to the free end (25) of the connector member (23) is prevented, and an "open position" occupied when the hand-engageable member (30) is moved upwardly from said lowermost position in which access to the free end (35) of the connector member (23) is permitted. <IMAGE>

Description

SPECIFICATION Lifting Attachment Description of Invention This invention relates to a lifting attachmentto provide a releasable connection between an object to be lifted and a lifting means.

An object of the invention is to provide a lifting attachment which can be safely and easily releasably connectd to an object to be lifted.

According to one aspect of the invention, we provide a lifting attachment comprising a body having an attachment means at the, in use, upper end thereof for connection to a lifting means, and a connector member at the, in use, lower end thereof which extends transversely of a longitudinal axis of the body extending between said ends, and having a free end, a hand-engageable member slidably mounted on the body for reciprocation longitudinally of the body, an obturating member connected to the hand-engageable member and movable therewith between a "closed position" which it occupies when the hand-engageable member is in its lowermost position, and in which position access to the free end of the connector member is prevented, and an "open position" occupied when the hand-engageable member is moved upwardly from said lowermost position in which access to the free end of the connector member is permitted.

The connector member may comprise a pin fixed at one end to an extension member projecting longitudinally from the lower end of the body so as to extend spaced from and below the body.

The obturating member may have a part adapted to extend transversely across the free end of the pin in a direction transverse to the longitudinal axis of the pin.

The obturating member may be of generally channel configuration, said transversely extending part comprising the base of the channel and the limbs of the channel being adapted to overlap laterally opposite side parts of the pin.

The body may be tubular and the handengageable member may comprise a sleeve slidably mounted thereon.

The attachment means may comprise a lug apertured to receive a fastener such as a shackle pin.

The invention will now be described in more detail by way of example, with reference to the accompanying drawings, wherein: Figure 1 is a side elevation of a lifting attachment shown connected to an object to be lifted; Figure 2 is a similar view to that of Figure 1 but showing the lifting attachment disconnected from the object; and Figure 3 is a section on the line 3-3 of Figure 2.

Referring to the drawings, a lifting attachment is indicated generally at 10 and comprises a tubular body 11,the majority of which is of cylindrical internal and external configuration, as indicated at 12 and 13 but having an upper portion of frustoconical external and internal configuration as indicated at 14, 15.

At the upper end of the frusto-conical portion is a lug 16 apertured as indicated at 17 to receive a pin 18 of a suitable shackle 19 provided on a lifting means, such as a crarie.

Welded within a slot formed in the body 10 is an extension bar 20 having a part-cylindrical surface 21 and having a lower end part 22 of right parallelepiped configuration with a connector pin 23 extending horizontal therefrom, the pin 23 being of cylindrical external configuration except for a conical nose portion 24 having a free end 25. The pin 23 is thus mounted in a cantilever on the part 22 so as to extend transversely of and below the body 10 perpendicular to the longitudinal axis L-Lthereof.

The connector pin 23 is adapted to be received in a bore 26 provided in a lug 27 provided on an item to be lifted. As shown in Figure 2, the connector 23 is engaged with the bore 26 by relative movement between the lug 27 and the pin 23 in a direction parallel to the longitudinal axis X-X of the pin 23 until the pin is in the position shown in Figure 1 relative to the lug.

Atubular sleeve 30 having a cylindrical internal surface 31 and a cylindrical external surface 32 is slidably mounted on the body 10. The diameter of the surface 31 is such as to make the sleeve 30 a sliding fit on the external surface 12 of the body 10.

The sleeve 30 carries an obturating member 33 in the form of a generally channel shaped member having a base part 34 and spaced limb parts 35.

The base part 34, as shown in Figure 1, engages over the free end 25 of the pin 23 and hence prevents access being gained thereto and hence prevents movement of the lug 27 over the free end 25, and in particular disengagement of the pin 23 from the passage 26. The limbs 35 overlap laterally opposite side parts of the pin 23 with sufficient clearance to receive therebetween the lug 27 when provided with side webs 38 having a downwardly and outwardly inclined upper surface.

The sleeve 30 is provided with an inwardly projecting pin 36 which is received in a slot 37 formed in the wall of the body to restrict the extent of longitudinal movement of the sleeve.

1. A lifting attachment comprising a body having an attachment means at the, in use, upper end thereof for connection to a lifting means, and a connector member at the, in use, lower end thereof which extends transversely of a longitudinal axis of the body extending between said ends, and having a free end, a hand-engageable member slidably mounted on the body for reciprocation longitudinally of the body, an obturating member connected to the hand-engageable member and movable therewith between a "closed position" which it occupies when the hand-engageable member is in its lowermost position, and in which position access to the free end of the connector member is prevented, and an "open position" occupied when the hand-engageable member is moved upwardly from said lowermost position in which access to the free end of the connector member is permitted.

2. An attachment according to Claim 1 wherein

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Lifting Attachment Description of Invention This invention relates to a lifting attachmentto provide a releasable connection between an object to be lifted and a lifting means. An object of the invention is to provide a lifting attachment which can be safely and easily releasably connectd to an object to be lifted. According to one aspect of the invention, we provide a lifting attachment comprising a body having an attachment means at the, in use, upper end thereof for connection to a lifting means, and a connector member at the, in use, lower end thereof which extends transversely of a longitudinal axis of the body extending between said ends, and having a free end, a hand-engageable member slidably mounted on the body for reciprocation longitudinally of the body, an obturating member connected to the hand-engageable member and movable therewith between a "closed position" which it occupies when the hand-engageable member is in its lowermost position, and in which position access to the free end of the connector member is prevented, and an "open position" occupied when the hand-engageable member is moved upwardly from said lowermost position in which access to the free end of the connector member is permitted. The connector member may comprise a pin fixed at one end to an extension member projecting longitudinally from the lower end of the body so as to extend spaced from and below the body. The obturating member may have a part adapted to extend transversely across the free end of the pin in a direction transverse to the longitudinal axis of the pin. The obturating member may be of generally channel configuration, said transversely extending part comprising the base of the channel and the limbs of the channel being adapted to overlap laterally opposite side parts of the pin. The body may be tubular and the handengageable member may comprise a sleeve slidably mounted thereon. The attachment means may comprise a lug apertured to receive a fastener such as a shackle pin. The invention will now be described in more detail by way of example, with reference to the accompanying drawings, wherein: Figure 1 is a side elevation of a lifting attachment shown connected to an object to be lifted; Figure 2 is a similar view to that of Figure 1 but showing the lifting attachment disconnected from the object; and Figure 3 is a section on the line 3-3 of Figure 2. Referring to the drawings, a lifting attachment is indicated generally at 10 and comprises a tubular body 11,the majority of which is of cylindrical internal and external configuration, as indicated at 12 and 13 but having an upper portion of frustoconical external and internal configuration as indicated at 14, 15. At the upper end of the frusto-conical portion is a lug 16 apertured as indicated at 17 to receive a pin 18 of a suitable shackle 19 provided on a lifting means, such as a crarie. Welded within a slot formed in the body 10 is an extension bar 20 having a part-cylindrical surface 21 and having a lower end part 22 of right parallelepiped configuration with a connector pin 23 extending horizontal therefrom, the pin 23 being of cylindrical external configuration except for a conical nose portion 24 having a free end 25. The pin 23 is thus mounted in a cantilever on the part 22 so as to extend transversely of and below the body 10 perpendicular to the longitudinal axis L-Lthereof. The connector pin 23 is adapted to be received in a bore 26 provided in a lug 27 provided on an item to be lifted. As shown in Figure 2, the connector 23 is engaged with the bore 26 by relative movement between the lug 27 and the pin 23 in a direction parallel to the longitudinal axis X-X of the pin 23 until the pin is in the position shown in Figure 1 relative to the lug. Atubular sleeve 30 having a cylindrical internal surface 31 and a cylindrical external surface 32 is slidably mounted on the body 10. The diameter of the surface 31 is such as to make the sleeve 30 a sliding fit on the external surface 12 of the body 10. The sleeve 30 carries an obturating member 33 in the form of a generally channel shaped member having a base part 34 and spaced limb parts 35. The base part 34, as shown in Figure 1, engages over the free end 25 of the pin 23 and hence prevents access being gained thereto and hence prevents movement of the lug 27 over the free end 25, and in particular disengagement of the pin 23 from the passage 26. The limbs 35 overlap laterally opposite side parts of the pin 23 with sufficient clearance to receive therebetween the lug 27 when provided with side webs 38 having a downwardly and outwardly inclined upper surface. The sleeve 30 is provided with an inwardly projecting pin 36 which is received in a slot 37 formed in the wall of the body to restrict the extent of longitudinal movement of the sleeve. CLAIMS

2. An attachment according to Claim 1 wherein the connector member comprises a pin fixed at one end to an extension member projecting longitudinally from the lower end of the body so as to extend spaced from and below the body.

3. An attachment according to Claim 2 wherein the obturating member has a part adapted to extend transversely across the free end of the pin in a direction transverse to the longitudinal axis of the pin.

4. An attachment according to Claim 3 wherein tne obturating member is of generally channel configuration, said transversely extending part comprising the base of the channel and the limbs of the channel being adapted to overlap laterally opposite side parts of the pin.

5. An attachment according to any one of Claims 1 to 4 wherein the body is tubular and the hand engageable member comprises a sleeve slidably mounted thereon.

6. An attachment according to any one of Claims 1 to 5 wherein the attachment means comprises a lug apertured to receive a fastener.

7. A lifting attachment substantially as hereinbefore described with reference to and as shown in the accompanying drawings.

8. Any novel feature or novel combination of features disclosed herein and/or shown in the accompanying drawings.