Abstract:
A drill gripping device is shown with an inexpensive and compact design. In one embodiment, an inexpensive and more compact design is possible through the use of a single actuator with a single gripping portion of a drill gripping device. Embodiments of drill gripping devices shown are further reduced in price and size due to a force amplification device such as a camming arm. Alternatively, an increased gripping force is possible using an existing size actuator. A drill gripping device is shown with increased precision in gripping. A pair of gripping jaws are synchronized to improve jaw centering capabilities.
Abstract:
One aspect of the present invention is directed to a door, and more specifically, to a door that includes a web and a rigid foamed core. In one embodiment, a door is disclosed which comprises a door shell having a generally planar construction with marginal edges and first and second door skins helping to define an interior door cavity, a web disposed within the interior door cavity, and a rigid foamed cementitious core disposed within the interior door cavity and cooperating with the web.
Abstract:
A pipe breaking assembly (100) is shown with a modular design that allows a user to more economically purchase a single base unit (110) that is adaptable using a number of elements. Combinations of elements such as blade portions (130) and expander cones (140), etc. allow the modualr assembly to be tailored to a variety of job conditions. A pipe breaking assembly (100) is shown that includes a particular configuration where a blade portion (130) is located in front of a shortened expander cone (140). The shortened expander cone (140) provides a lower contact area that in turn reduces friction.
Abstract:
Drill stem elements and connections are shown with advantages such as being mechanically robust. The absence of a side access window in a sonde housing is one design feature that provides robust mechanical properties. Further advantages of the sonde housings include being easy to disassemble for access to the sonde unit, or for insertion of the sonde unit. In one embodiment, a cap portion is easily secured or removed using a small allen wrench, or a hammer and a punch. The cap portion is not substantially affected or tightened by rotation of the drill stem during a drilling operation. A further advantage includes the ability to remove cap portions and pull back flexible product such as polyethylene pipe from a small exit pit.