Multifunctional Geological Hammer with Detachable Handles and Built-In Tools

The problem

Geological survey work requires breaking rock, prying samples, measuring orientations, marking locations, and sometimes working in low light. Carrying a standard rock hammer alongside separate saws, screwdrivers, flashlights, compasses, and marking pins adds significant weight to a field kit. When multiple single-function tools are packed together, items can be lost or take time to locate during active sampling. Furthermore, repeated striking against hard rock transmits vibration through a rigid handle, causing hand discomfort over long periods of use. A tool that consolidates these functions while remaining easy to carry addresses the practical limits of field equipment.

The solution

This design centers on a hammer body (1) that serves as the main hub. An extension handle (2) and a grip handle (3) attach to it using threaded joints—a first threaded joint (21) and a second threaded joint (31). Users can assemble just the grip handle for close work, add the extension handle for reach, or carry the parts separately.

The hammer body incorporates several fixed tools: a sawtooth (15) along the top edge, a vertically mounted detachable screwdriver (11) in the middle, a striking face (tup, 13) at the bottom, and a curved hook-shaped crowbar (14) on the inner side of the striking face. An LED (12) is embedded in the body for illumination.

The grip handle features a vibration-absorbing rubber sleeve (32) on the outside. Inside, a volumetric bin holds a pin for carving characters (34), which is pushed by a spring (33) and secured behind a hinged bonnet (35). A lanyard (36) attaches to the end. The extension handle can be fitted with a compass (22), a magnifier (23), a horizon rule (24), or a miniature compass, and its upper and lower faces carry engraved or printed rulers.

Who it is for

• Geological equipment brands looking to expand their field-tool catalog with a multi-function hammer that reduces the number of separate items a surveyor must buy.
• Mining exploration companies equipping field crews who need durable striking, prying, and measuring tools in a single portable package.
• University earth science departments outfitting students for field camps where minimizing pack weight while retaining essential functions is a priority.
• Outdoor and survey tool distributors supplying professionals who require modular hand tools that adapt to different site conditions.

How it works

The main parts

Operating steps

1. Transport configuration: Unscrew the connection handle and hammer handle from the hammer body. Pack the three pieces separately to save space.
2. Assembly: Thread the first threaded joint (21) of the connection handle into the hammer body. Thread the second threaded joint (31) of the hammer handle into either the connection handle or directly into the hammer body, depending on the required length.
3. Marking: Open the hinged bonnet (35) on the hammer handle. The spring (33) pushes the pin for carving characters (34) outward. Use the pin to mark the target position on the rock, then press it back into the bin and close the bonnet.
4. Striking and prying: Hold the hammer handle by the vibration-absorbing rubber sleeve (32). Turn on the embedded LED (12) if light is needed. Strike the rock with the tup (13) or use the curved hook-shaped crowbar (14) to lever up material.
5. Cutting and turning screws: Use the sawtooth (15) on the top of the hammer body to cut stone or wood. Unscrew the detachable screwdriver (11) from the middle of the body to turn screws on field equipment.

Applications

Mineral exploration camps

Exploration geologists move across rough terrain daily, carrying sample bags, maps, and instruments. Consolidating the hammer, pry bar, saw, and marking pin into one modular unit reduces the number of loose items in a field vest or pack.

University field mapping courses

Students learning structural geology need to measure strike and dip while collecting hand samples. The connection handle’s integrated compass, horizon rule, and engraved rulers allow orientation measurements without switching to a separate pocket transit for basic checks.

Quarry and construction site inspection

Engineers inspecting rock faces or concrete structures often need to chip away surface material and check fasteners. The hardmetal detachable screwdriver and the striking face serve both purposes without requiring a return to a toolbox.

Nighttime or underground surveys

Working in tunnels, caves, or after sunset limits visibility when positioning strikes. The embedded LED provides directed light exactly where the hammer body contacts the surface, keeping one hand free to hold the tool rather than a flashlight.

Environmental soil sampling

Technicians collecting shallow core samples or clearing surface debris use the curved hook-shaped crowbar to pry up compacted earth. The vibration-absorbing rubber sleeve reduces fatigue when repeatedly driving the tool into hard ground.

Where it is less suitable

• Heavy demolition work - the modular threaded joints and built-in compartments are designed for geological sampling, not continuous high-impact structural demolition.
• Precision machining environments - while the screwdriver handles field adjustments, dedicated insulated or precision tool sets remain necessary for sensitive laboratory equipment.
• Deep underwater surveys - the patent does not describe waterproof sealing for the volumetric bin or LED compartment, so submersion applications would require further engineering.