Pliers with separately installed jaws
AssigneeSwanstrom Tools USA Inc.
InventorJohn E. Swanstrom, Jr.
Life of this patent
Estimating the term…
Abstract
A pliers having separate jaws secured to handles by interengagement of either a press-fitted boss and corresponding smooth bore or a threaded boss and threaded bore between the jaws and handles. In at least round nose and needle nose embodiments each jaw has a generally symmetric envelope about a central axis and the threaded member is located concentric to the central axis for ease and economy of manufacture. The long nose embodiment may also utilize the symmetric envelope with a portion of the generally conical jaw removed to form a flat, work engaging surface. Mating surfaces perpendicular to the central axis maintain alignment of the jaw to its respective handle. Round nose, long nose and needle nose pliers may be manufactured using the present invention.
Claims13
A method of manufacturing pliers comprising the steps of:
- a. forging a pair of handles each handle having a mediate region for mounting a pivot member, a grasping portion located on one side of the mediate region and a jaw support mount on the other side of the mediate region;
- b. machining one of a mounting boss and a mating bore in each of the jaw support mounts;
- c. machining each of a pair of jaws to have a generally circularly cylindrically symmetric envelope about a central axis, and machining the other of the mounting boss and mating bore at a proximal end of each jaw;
- d. attaching each jaw to a respective one of the pair of handles by engaging the boss with the bore;
- and
- e. pivotably attaching the mediate portions of the handles together.
A jaw and handle combination for a pliers formed by the method comprising the steps of:
- a. forming a handle having a jaw support mount;
- b. forming a jaw separate from the handle with the jaw having a generally conical exterior surface having a base and a central axis;
- c. attaching the jaw to the handle such that a portion of the jaw overhangs the jaw support mount of the handle in the region of the base;
- and forming a flat on the jaw aligned with a closing plane of the jaw and handle.
Dependencies are inferred from the claim text.