The present invention relates generally to a valve lock assembly and more particularly to a valve lock assembly that is highly tamper resistant and easy to install.
Utilities, such as water, are provided to customers through lines that include valves. These valves, which are commonly referred to as “stops” or “cocks,” are used to control the flow of water through the line. Such valves are well known and generally include a body portion having an inlet and outlet that are separated by a rotatable plug. The plug has a handle or knob that may be rotated to control fluid flow.
As will be appreciated, it is generally desirable to secure such utility valves so that they cannot be opened to provide gas or water to an unauthorized customer. Typically, securing such valves involves partially enclosing the valve with a shroud so that the handle or knob cannot be accessed. The shroud is secured in place over the valve with, for example, a pad lock.
In a known locking assembly, a shroud is locked about a water valve through the use of a pad lock that includes an exposed, accessible shackle which, in some circumstances, may be cut with bolt cutters or the like. While such assemblies are generally quite effective at securing utility valves, a valve lock having a shackle portion that cannot be accessed to be cut is desirable.
Moreover, known valve locks are relatively difficult to remove or install, as they are located in subterranean water meter boxes that are relatively small and cramped. Known valve locks also have a somewhat limited range of motion when installed making insertion of a key challenging, particularly in the cramped confines of a meter box.
Known valve locks also include shrouds that are relatively expensive to manufacture, as they must be stamped, folded and then welded to form a box. As will be appreciated, a valve lock assembly that includes a shroud or cover that provides an ease of manufacture is desirable.
It is an object of the present invention to provide a valve lock assembly.
It is an additional object of the present invention to provide a valve lock assembly that is highly tamper resistant.
It is an additional object of the present invention to provide a valve lock assembly that is easy to install and remove.
It is an additional object of the present invention to provide a valve lock assembly that may be easily manufactured.
An embodiment of the inventive valve lock assembly includes a cover for selective placement over a valve. The cover has opposing sidewalls, each sidewall including at least one cover aperture. The assembly further includes a strap to secure the cover to the valve, the strap having opposing end portions each of which include at least one strap aperture. A locking pin is placed through both the strap apertures and the cover apertures when they are aligned. The assembly also includes a lock body, which features a first bore to receive the locking pin, and a second bore which receives a locking mechanism that prevents removal of the locking pin from the lock body. The lock body is freely rotatable about the locking pin so that the valve lock assembly may be installed or removed from a wide range of angles.
An addition embodiment of the inventive valve lock assembly includes a cover for selective placement over a valve, the cover having opposing sidewalls each of which includes at least one cover aperture. The assembly further includes a strap having opposing end portions each of which include at least one strap aperture. A locking pin which may be placed through both the strap apertures and the cover apertures, when the strap and cover apertures are aligned, is also included. The assembly further includes a lock body having both a through bore to receive the locking pin and a blind bore. A locking mechanism is also included which is received by the blind bore to prevent removal of the locking pin from the lock body. The lock body is freely rotatable about the locking pin so that the valve lock assembly may be installed or removed from a range of angles and the cover at least partially covers the locking pin thereby protecting it from tampering.
Yet another embodiment of the inventive valve assembly includes a cover for selective placement over a valve. The cover having opposing sidewalls, each sidewall including a plurality of cover apertures. The cover having an upper surface having two slots and two radiused edge portions. A substantially U-shaped strap having opposing end portions each of which include a plurality of strap apertures is also included. The end portions pass through the slots of the cover to attach the cover to a valve. The assembly also includes a locking pin, which may be placed through both the strap apertures and the cover apertures, when the strap and cover apertures are in alignment, to removably secure the cover to the valve. The locking pin having an end flange to limit its travel through the apertures. A circular lock body in further included which has a through bore to receive the locking pin. The lock body further included a blind bore. A barrel lock is included which is removably received by the blind bore to prevent removal of the locking pin from the lock body. The lock body is freely rotatable about the locking pin so that the valve lock assembly may be installed or removed from a range of angles and the cover at least partially covers the locking pin thereby protecting it from tampering.
In particular, the valve lock assembly 10 includes a shroud 40 that is secured over a valve 50 through the use of a strap portion 60, which extends through slots 70 in an upper surface of the shroud 40 (
A potential drawback of this known valve lock assembly 10 is that when the water meter box cover 90 is removed, the shackle 30 of the pad lock 20 is exposed. As will be appreciated, the exposed shackle 30 may be cut with bolt cutters or the like and the assembly 10 may be removed from the valve 50. The valve 50 can then be manipulated to initiate the flow of water.
Moreover, as shown in
In particular, as shown in
As discussed in greater detail below, the inventive valve lock assembly addresses these potential issues and more.
Turning now to
Referring now to both
As will be appreciated, the cover 220 has five walls, a top wall 350, which contains the slots 340, a front wall 360, a rear wall 370, and two sidewalls 380. The cover 220 is open on the bottom so that it may be placed over a valve 240. The front and rear walls 360, 370, both include concave, radiused edges 390, that are configured to receive curved surfaces of the valve 240 (
In one embodiment, the cover 220 is preferably manufactured from a one-piece stamping. As stated previously, known valve locks include shrouds, such as shroud 40 (
As will be appreciated, the cover 220 should be manufactured from a suitably hard material, such as, for example, hardened steel.
Turning now to
In use, the strap 260 allows the cover 220 to be removably secured to the valve 240 by inserting the end portions of the strap 260 through the slots 340 of the cover. The strap apertures 400 are then aligned with the cover apertures 330 and a locking pin 300 (
The locking pin 300 is shown in detail in
As stated above, in use, the locking pin 300 is inserted into a through bore 460 in the substantially circular lock body 280. Referring to
When the locking pin is inserted into the lock body, the flange end of the pin limits its travel such that the neck portion 430 of the pin is located at the point of intersection of the bores 460, 470 in the lock body 280. The reduced size of the neck portion allows a barrel lock 320, for example, to be inserted into the lock body and locked in place thereby preventing the pin from being removed from the lock body 280. As will be appreciated, the larger head portion 420 cannot pass by the barrel lock 320 when it is in bore 470, and the locking pin 300 cannot be removed.
The neck portion 430 of the pin need not extend annularly around a circumference of the locking pin 300. Alternatively, in another embodiment, the neck portion 430 may be a notch or cutaway in the pin that is sized or shaped to accommodate a barrel lock while preventing pin removal when assembled as described above.
An important aspect of the present invention is that the lock body 280 may freely rotate about the locking pin. This is significant, in that it is often difficult to install a lock on a valve that is located in a subterranean box having a restricted area. Known designs, such as the valve lock 10 depicted in
To this end, it will be appreciated that the lock body 280 need not be round as shown. Other shapes may be used as long as the body 280 allows for free rotation about a locking pin when assembled as described herein.
Moreover, known valve locks include relatively long pad locks that are difficult to install in the limited space of a box. The inventive assembly 200 includes a relatively compact and short locking pin 300 with an equally compact lock body 280 that are spaced apart from the walls of the box to an extent greater than with known valve locks.
Another important feature of the present invention is that it is tamper resistant. That is, known valve locks include a pad lock 20 with a large shackle 30. As shown in
It is to be understood that the above description is intended to be illustrative, and not restrictive. For example, the above-described embodiments (and/or aspects thereof) may be used in combination with each other. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. While the dimensions and types of materials described herein are intended to define the parameters of the invention, they are by no means limiting and are exemplary embodiments. Many other embodiments will be apparent to those of skill in the art upon reviewing the above description. The scope of the invention should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
In the appended claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein.” Moreover, in the following claims, the terms “first,” “second,” “third,” “upper,” “lower,” “bottom,” “top,” “up,” “down,” etc. are used merely as labels, and are not intended to impose numerical or positional requirements on their objects. Further, the limitations of the following claims are not written in means-plus-function format and are not intended to be interpreted based on 35 U.S.C. §112, sixth paragraph, unless and until such claim limitations expressly use the phrase “means for” followed by a statement of function void of further structure.
This written description uses examples to disclose several embodiments of the invention, including the best mode, and also to enable any person skilled in the art to practice the embodiments of invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
As used herein, an element or step recited in the singular and proceeded with the word “a” or “an” should be understood as not excluding plural of said elements or steps, unless such exclusion is explicitly stated. Furthermore, references to “one embodiment” of the present invention are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features. Moreover, unless explicitly stated to the contrary, embodiments “comprising,” “including,” or “having” an element or a plurality of elements having a particular property may include additional such elements not having that property.
Since certain changes may be made in the above-described valve lock assembly, without departing from the spirit and scope of the invention herein involved, it is intended that all of the subject matter of the above description or shown in the accompanying drawings shall be interpreted merely as examples illustrating the inventive concept herein and shall not be construed as limiting the invention.