Class 299/37.2 - Resonant vibrator driven

Subclass of Class 299 - Mining or in situ disintegration of hard material
Definition: Reciprocating or oscillating cutter which is of the nonlinear
No. of patents: 23
Last issue date: 02/19/2008

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Number	Title	Issue Date
7331636	Electric milling machine A milling machine comprising a housing including a frame, a front wheel assembly supporting the housing, at least a first rear wheel assembly and a second rear wheel assembly supporting the housing, a milling drum mounted within the housing and extending below the h...	02/19/2008
7234537	Sonic drill A sonic drilling apparatus having a work piston within a cylinder chamber to provide a vibratory force through the alternate application of fluid under pressure into the bore above and below the piston in a manner that the piston will be forced to reciprocate within...	06/26/2007
6932166	Pneumatic tool A pneumatic tool (20) for impacting a workpiece (22) is provided. The tool (20) comprises a casing (42) defining a chamber (48). A piston (54) is slidable within the chamber (48) along an operational axis (A). An exha...	08/23/2005
6609762	Walk behind floor stripping machine with hydraulic drive A hydraulically powered self-propelled stripping machine having an electric motor for providing oscillating motion to a cutting head member. The electric motor driving a hydraulic pump for pumping hydraulic fluid to a hydraulic motor for driving the wheel...	08/26/2003
6378951	Vibratory pavement breaker An electrohydraulic pavement breaker system having cavities (28, 30) which are filled with hydraulic fluid (oil) or gas, and which provide mass spring system which is resonant at a frequency which is especially adapted for breaking and rubblizing concrete...	04/30/2002
6033031	Milling machine with vibrating mechanism and rotary drum A milling machine is disclosed, which machine includes a frame, a drive mechanism for advancing the machine across a surface to be milled, and a milling assembly mounted on the frame of the machine for cutting a width of material from the surface in the p...	03/07/2000
5039170	Resonant beam suspension pads A pad (22) for isolating a weight (4) from vibration of a resonant beam (8) in a resonant beam support system (6) for dissipating heat. The pad is constructed of a rubberlike material having ridges (58) and grooves (60). The ridges and grooves include a t...	08/13/1991
4732506	Surface crushing apparatus This invention describes an apparatus for breaking a hard surface such as a concrete road or bridge deck and essentially consists of a support for a torsional spring which is horizontally fixed to the support with a spaced rotational journal so that the t...	03/22/1988
4515408	Counterweight support for resonantly driven tool The present invention provides an improved mechanism for positioning the weight relative to the resonant beam in resonantly driven impact systems....	05/07/1985
4511282	Pavement penetrating tool An improved penetrating tool for pavement breakers is disclosed. The tool of the present invention has a flange with a striking surface which extends in the direction of motion of the vehicle. The striking surface is curved so that the closing angle, defi...	04/16/1985
4444434	Continuous miner A continuous miner includes a pair of resonant beams for driving a cutting blade rigidly secured to their lower anti-nodes. By mounting the beams so that they can pivot about both upper and lower nodes, the miner may be operated to make either vertical or...	04/24/1984
4402629	Resonantly driven pavement crusher A pavement breaker including a mobile carrier vehicle is disclosed. A beam is provided having a resonant frequency with a pair of nodes spaced from the input and output ends of the beam and anti-nodes at each end and at the center. An oscillator is fixed ...	09/06/1983
4343514	Resonant tool driving system with gap A sonic generator produces a reciprocating force that is transmitted to a tool by a resonant or nonresonant force transmitting member having an output that reciprocates about a neutral position responsive to the force of the sonic generator. A continuous ...	08/10/1982
4340255	Resonantly driven vertical impact system A surface impact system including a mobile carrier vehicle is disclosed. A beam is provided having a resonant frequency with a pair of nodes spaced from the input and output ends of the beam and anti-nodes at each end and at the center. An oscillator is f...	07/20/1982
4330156	Resonant system speed control A resonant work performing apparatus is disclosed which includes a resonant system which is vibratory in resonance at an unloaded resonant frequency. The resonant system has a vibratory input at a frequency near the resonant frequency, and a vibratory out...	05/18/1982
4258956	Method and apparatus for driving a single transversely elongated tool with a plurality of force transmitting beams An elongated tool is mounted for reciprocal motion on a support frame. A plurality of resonant force transmitting beams each having an input, an output, and at least one resonant node, are supported by the frame so their outputs are spaced apart adjacent ...	03/31/1981
4257648	Non-resonant cyclic drive system employing rectification of the cyclic output A vibratory drive system for use in spalling a road surface, cutting rock, etc. Vibratory energy is generated by means of an orbiting mass oscillator, the output of which is rectified by means of a rectifier to provide unidirectional pulses to a cutting t...	03/24/1981
4252376	Ripping tool driving apparatus A ripping tool positioned below the earth's surface is driven by the output of a vibrating, preferably, resonant, force transmitting beam which has lateral dimensions smaller than those of the ripping tool and is positioned below the earth's surface. The ...	02/24/1981
4251111	Resonant beam for tool driving apparatus A force transmitting, preferably resonant, beam having a pair of straight divergent legs meeting at a juncture. A work tool is located adjacent to the end of one leg, which is the beam output. A sonic oscillator is coupled to the end of the other leg, whi...	02/17/1981
4250760	Drive assembly for pavement planing apparatus A pavement chipping tool uses a sonic oscillator which includes a housing integral with a resonant beam. The oscillator includes a rotating shaft journaled in two sets of bearings with an eccentric weight attached to the shaft between the two sets of bear...	02/17/1981
4230369	Pavement planing method and apparatus Asphalt or concrete pavement is removed from a road bed by an elongated cutter blade that extends in a downward and forward direction along a cutting plane to a cutting edge. The cutting plane forms an acute angle of between 45° and 55° with the surface...	10/28/1980
4229045	Resonant tool driving apparatus with tool stop A sonic generator produces a reciprocating force that is transmitted to a tool by a resonant or nonresonant force transmitting member having an output that reciprocates in forward and backward directions about a neutral position responsive to the force of...	10/21/1980
4053958	Surface preparation machine This device consists primarily of a tool (blade, chisel, or sanding attachment) which is attached to a tool holder. The tool holder in turn is attached by a bearing to a shaft which passes thru a flywheel, the shaft is offset from the center of the flywhe...	10/18/1977

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Class 299/37.2 - Resonant vibrator driven