# US 8,540,034 B2 · Pneumatic drill device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,034 B2 - Document ID: US8540034B2 - Status: Granted - Kind: B2 - Application number: 12/864,922 - Filed: 2009-01-30 - Published: 2011-06-30 - Granted: 2013-09-24 - Earliest claimed: 2008-01-31 - Assignees: Sullair Corporation - Applicants: Julien Poncet; Alain Mucig; Patrice Charlat - Inventors: Julien Poncet; Alain Mucig; Patrice Charlat - Web page: https://patentgrep.com/patent/US8540034B2 ## CPC - B25D 17/00: Details of, or accessories for, portable power-driven percussive tools {(details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00)} - B25D 9/04: of the hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member - B25D 17/04: Handles; Handle mountings - B25D 17/11: Arrangements of noise-damping means {(noise damping in general G10K11/16)} - B25D 2222/54: Plastics - B25D 2250/065: Details regarding assembling of the tool - B25D 2250/121: Housing details - B25D 2250/181: Pneumatic tool components - B25D 2250/365: Use of seals - B25D: PERCUSSIVE TOOLS {(percussive machines for forging B21J; hand-held drilling machines, in general B23B45/00, for wood B27C3/08; drilling machines, used for mining or quarrying, with reciprocating tool which is turned intermittently when out of contact with the working face E21B1/00)} ## Abstract Pneumatic drill device comprising an outer casing, an assembly of a cylinder and a movable piston actuating a pick element, a device for supplying the cylinder with compressed air, an air exhaust device and an operational control device, wherein the outer casing is formed from two complementary sections adapted to fit into one another in order to enclose, in addition to the cylinder and piston assembly, the said devices for supplying the cylinder, for air exhaust and for operational control. ## Claims ### Claim 1 A pneumatic drill device comprising: an assembly and an outer casing, said assembly including a cylinder defining a bore and a movable piston, said piston in said bore configured to actuate a pick element, a supply device for supplying the bore with compressed air, and an operational control device, said outer casing being formed from two complementary sections defining an internal cavity enclosing said assembly, said outer casing defining at least one channel in fluid communication with said bore, said at least one channel extending from said internal cavity and formed partially through the thickness of at least one of the casing sections. ### Claim 2 (depends on 1) The pneumatic drill device according to claim 1, wherein said assembly is rigidly fixed between said casing sections which are clamped against one another in sealed manner. ### Claim 3 (depends on 1) The pneumatic drill device according to claim 1, wherein said casing sections are adapted in shape so as to house, in their linked portion, said assembly, which are thus sandwiched between the two assembled casing sections. ### Claim 4 (depends on 1) The pneumatic drill device according to claim 1, wherein said casing sections comprise at least one layer of material adapted to insulate vibrations and operating noise from the assembly. ### Claim 5 (depends on 1) The pneumatic drill device according to claim 1, wherein said casing sections are formed by moulding of synthetic materials. ### Claim 6 (depends on 1) The pneumatic drill device according to claim 1, wherein said casing sections are adapted to the use of a small lightweight drill for finish drilling or drilling with limited access. ### Claim 7 (depends on 1) The pneumatic drill device according to claim 1, wherein said casing sections are two half-shells made of plastics. ### Claim 8 (depends on 1) The pneumatic drill device according to claim 1, wherein one of said casing sections includes a peripheral bead received in a corresponding groove defined by the other said casing section. ### Claim 9 (depends on 1) The pneumatic drill device according to claim 1, wherein said casing sections define at least one operating handle configured to receive the operational control device. ### Claim 10 (depends on 9) The pneumatic drill device according to claim 9, wherein the handle is offset from the axis of the cylinder and includes a front branch and a rear branch configured in the shape of a “D”, the front branch configured to protect the operator's hand. ### Claim 11 (depends on 10) The pneumatic drill device according to claim 10, wherein said at least one channel is a first exhaust baffle configured to vent air out of the bore without interfering with the operator's hand. ### Claim 12 (depends on 11) The pneumatic drill device according to claim 11, wherein the casing sections define a residual cavity extending from the internal cavity and in fluid communication with said at least one channel for collecting any air leaks from said assembly. ### Claim 13 (depends on 10) The pneumatic drill device according to claim 10, wherein the rear branch incorporates a supply tubing at an outer end and a supply valve connected to the control device, said supply tubing in fluid communication with said at least one channel. ### Claim 14 (depends on 1) The pneumatic drill device according to claim 1, wherein said at least one channel is configured to vent an amount of air between said piston and said pick element towards the pick element. ### Claim 15 (depends on 1) A pneumatic drill device according to claim 1, wherein said casing sections are symmetrical. ### Claim 16 (depends on 1) A pneumatic drill device according to claim 1, wherein said at least one channel is elongated in a direction from a proximal end and a distal end of said cylinder and is configured to selectively communicate an amount of air from said supply device to said bore when said piston is positioned near said distal end.