This class includes implements or apparatus for applying a pushing or pulling force directly to either (a) an object to be moved, or (b) a generally stationary object upon which pressure or tension is to be exerted. It comprises jacks (including lifting jacks, floor jacks, and analogous implements), extracting apparatus (including stump pullers and nail extractors), tensioning apparatus (including belt, carpet and wire stretchers), hoist trucks, and cable-type load hauling or hoisting apparatus. Also included in this class is the subcombination of a cable guide which (1) is a component of, or used in combination with, an implement or an apparatus of this class, and (2) is intended to guide a cable which is directly connected to either the object or an object-supporting or -engaging member.
This class does not include the power-applying elements of machines, such as pump or presses, nor the adjusting elements of articles such as tables and chairs. It may, however, include supports of general application not elsewhere classifiable when they comprise means for hoisting the load-carrying portion of the support.
Implements for performing compressing operations upon material, e.g., clamps and bundling devices, are excluded, also devices for merely grasping or engaging with something
to be moved.
LINES WITH OTHER CLASSES
Pushing or pulling implements of the jack or crowbar type, including those having special engaging features which engage between spring elements only, will be classified in Class 254. Those implements which engage between a spring and other structure to move or guide the spring into assembled or disassembled position will be classified in Class 29, subclasses 700+.
Patents that disclose a general use and state the implement can be used on an engine valve spring whether they coact with other structure for assembly or disassembly will be grouped as an art collection in Class 29, subclasses 215+.
Patents to an implement for spreading elements of a leaf spring are classified in Class 81, subclass 3.7.
REFERENCES TO OTHER CLASSESSEE OR SEARCH CLASS
29, Metal Working,
700+, for pushing and pulling implements specially designed for assembling and disassembling purposes.
40, Card, Picture, or Sign Exhibiting,
349+, for a copyholder including means to elevate a platen to move copy supported by the platen relative to a line guide.
81, Tools, appropriate subclasses for a hand manipulatable tool for exerting a push or pull, but having no force multiplier or energy transducer to develop the pushing or pulling force. See particularly
9.4, for a tool having means for pulling an insulating sheath from a wire, subclasses 300+ for pliers, subclass 485 for spreaders, subclass 486 for a resilient article tensioner or compressor, and subclass 487 for a tool having clamping jaws for gripping an article to be pulled.
173, Tool Driving or Impacting,
141+, and see the search notes therein for an advance causing or controlling means for a tool driving or impacting means.
187, Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle,
203+, for a stationary lift for a roadway vehicle which elevates the entire vehicle to a significantly higher level where it is inspected or repaired and appropriate subclasses for an elevator for lifting a load from a charging level to a