Tool End Cap

Tool End Cap

End Cap for a Hydraulic Fitting

An end cap for an open end of a hydraulic fitting having a peripheral flange can be provided by a threaded ring and a threaded insert. The threaded insert can be rotatably engaged with the threaded ring to move axially back and forth.

The threaded insert has a forward end face which can engage the open end of the hydraulic fitting to close the hydraulic fitting end or to couple with it. The threaded ring includes a locking member to embrace and engage the peripheral flange. The end cap can be used to prevent loss of oil from the hydraulic fitting during service of equipment on which the hydraulic fitting is utilized, and for other purposes.

There are a variety of circumstances in which it may be desirable to close or seal the open end of a hydraulic, pneumatic or other fitting. For example, when hydraulic equipment such as a construction vehicle or the like, is being serviced, oil-filled hydraulic lines, pipes and fittings are often disassembled during service and maintenance procedures. Much of the oil, or other working fluid, can be drained from many of these components without undue difficulty but a residue will often remain within the lines, pipes or fittings. This residual oil is prone to drip or drain from open fitting ends during service procedures, and may contaminate equipment surfaces, floors and other surfaces in the vicinity of the work area creating dirty, slippery and perhaps dangerous conditions.

It is accordingly desirable to provide an end cap to close such open ends that can be easily manipulated in a service bay, a workshop or in the field and can be assembled with an open ended fitting to close or seal it either by manual manipulation or by the use of simple tools. The presence of an annular flange around the end of some fittings may complicate the end closure problem.

To attempt to solve this problem it is known to provide a plastic cap to cover the fitting end. One example of such a plastic cap is a simple, lightweight, dish-shaped resilient cap which is a close fit over a flanged pipe end and has a modest retaining lip engagesble under the flange. Such plastic caps appear to be intended to keep out dirt and may retain some oil within the pipe they may not be satisfactory for some purposes because they are readily removed and cannot hold pressure. These shortcomings can be problematic in some cases, for example when it is desired to pressurize a flanged hydraulic fitting for test purposes or other reasons.

Nevertheless, there is a need for an end cap that can be used to cap a flanged hydraulic fitting and which can be employed in a hydraulic equipment service facility and for other purposes.

The foregoing description of background art may include insights, discoveries, understandings or disclosures, or associations together of disclosures, that were not known to the relevant art prior to the present invention but which were provided by the invention. Some such contributions of the invention may have been specifically pointed out herein, whereas other such contributions of the invention will be apparent from their context. Merely because a document may have been cited here, no admission is made that the field of the document, which may be quite different from that of the invention, is analogous to the field or fields of the present invention.

The locking member can define with the threaded ring a lateral opening to receive the hydraulic fitting annular flange in a direction transverse to the axis. If desired, the threaded ring can comprise a side wall and the locking member can comprise a forward portion of the side wall.

In another aspect, the invention provides a two-piece end cap for an open flanged end of a hydraulic pipe or hose fitting, the end cap comprising a ring having a slot and an internal thread, wherein the ring can slide over the flange in a direction radially of the hydraulic fitting with the slot in the ring receiving and accommodating the flanging of the flanged end and comprising a threaded plug wherein the threaded plug can be screwed into the ring to seal the open flanged end of the hydraulic fitting.

The hydraulic fitting can comprise a hydraulic pipe or hose end fitting and the invention includes a hydraulic system comprising the hydraulic fitting and an end cap according to the invention wherein the end cap caps the hydraulic fitting.

About the Author

Our company has formed featured products of Pneumatic Guns Fittings and Hydraulic Fitting as main products including Hose Barb Fitting,Quick Connector,Hose elbow 90 DEG,Barb Fitting,Pneumatic Fitting,Push in fitting,Swivel 45DEG,DOT Brass Fitting,M12 thrust washer,M22 thrust washer,M16 thrust washer,Unequal hex nipple and general and comprehensive series.

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