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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 8146677 | Hydraulic breaker assembly A hydraulic breaker assembly including a head cap, a cylinder, and a front head, which are mounted in a casing, wherein corresponding faces of the front head and the cylinder are connected by connecting pins, wherein the cylinder and the head cap located above the c... | 04/03/2012 |
| 7762347 | Impact power tool with a precision controlled drive system An improved impact power tool for carving and engraving an article comprises an air delivery system operable to communicate with a pressurized air source; a drive assembly operable to receive air from the pressurized air source via the air delivery system; a hand he... | 07/27/2010 |
| 7413027 | Impact power tool with a precision controlled drive system An improved impact power tool for carving and engraving an article comprises an air delivery system operable to communicate with a pressurized air source; a drive assembly operable to receive air from the pressurized air source via the air delivery system; a hand he... | 08/19/2008 |
| 7270182 | Earth loop installed with sonic apparatus A method for installing a heat exchange pipe loop in a borehole, the method, in at least certain aspects, including drilling a borehole with a sonic drill system having a head and casing connected thereto, a drill apparatus on a lower end of the casing movable by th... | 09/18/2007 |
| 7156190 | Impact tool An impact tool has a slidable hammer that is driven by hydraulic oil under pressure inside a chamber. The hydraulic oil is pressurized by a piston driven by compressed gas on the opposite side of the piston from the hydraulic oil. The gas in the gas chamber is compr... | 01/02/2007 |
| 7140450 | Percussion tool A percussion tool is described and which includes a housing mounting a tool bit; a reciprocally moveable hammer borne by the housing and which is operable to repeatedly strike the tool bit; and a reciprocally moveable piston enclosed within the hammer and which impa... | 11/28/2006 |
| 7093657 | Earth loop installed with sonic apparatus A method for installing a heat exchange pipe loop in a borehole, the method, in at least certain aspects, including drilling a borehole with a sonic drill system having a head and casing connected thereto, a drill apparatus on a lower end of the casing movable by th... | 08/22/2006 |
| 7048073 | Fastener installation systems A fastener installation tool to install fasteners, such as rivets, risers, standoffs, and other types of fasteners operates upon vacuum and air pressure. Fasteners are installed with minimal reactive forces to the operator's hand, thus reducing the risk of repetitiv... | 05/23/2006 |
| 7040417 | Drilling systems The present invention discloses, in certain aspects, systems and methods for producing cyclical impacts and, in certain aspects for moving a drilling apparatus for drilling a borehole in a formation, the system in certain embodiments including a housing with a longi... | 05/09/2006 |
| 6968989 | Manually operable device for driving nails A manually operable device for driving nails into material includes a barrel having a bore into which nails can be placed or dropped and the barrel capable of reaching difficult, narrow, tight spaces that are unreachable by a hammer. Disposed within the bore is a dr... | 11/29/2005 |
| 6966390 | Pile hammer A power tool (1) has a percussive driving implement for driving an impact tool (8). The driving implement, which may be hydraulic or pneumatic, retracts the impact tool (8) on its return stroke, against the force developed by heavy-duty elastic ... | 11/22/2005 |
| 6959967 | Hammer with high pressure shut-off A fluid-powered impact vibrator (5), in particular a hydraulic hammer, comprising a fluid-powered percussion hammer (8) with a percussion piston (18) that is moved back and forth under the effect of a control means (10) and comprising a g... | 11/01/2005 |
| 6955219 | Earth loop installation with sonic drilling A method for installing a heat exchange pipe loop in a borehole, the method in at least certain aspects, including drilling a borehole with a sonic drill system having a head and casing connected thereto, a drill shoe on a lower end of the casing movable by the soni... | 10/18/2005 |
| 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 |
| 6913088 | Hammer drill and /or percussion hammer with no-load operation control that depends on application pressure A percussion hammer drill and/or percussion hammer that can be guided by a handgrip comprises a pneumatic spring striking mechanism with a reciprocating drive piston and with a percussion piston that can be operated by the drive piston. A cavity for accommodating a ... | 07/05/2005 |
| 6907943 | Electric hammer It is, accordingly, an object of the present invention to provide an electric hammer with improved construction, while ensuring the vibration reduction performance. According to the present invention, a representative electric hammer may include a hammer bit, a driv... | 06/21/2005 |
| 6902012 | Percussion electrical hand-held tool An electrical hand held tool for producing at least a percussion movement of a working tool includes an electrical drive, a first, oscillating subassembly including a percussion mechanism (2) and a rotor (5) of the electrical drive for transmitting tor... | 06/07/2005 |
| 6691798 | Variable hand pressure activated power tool A hand-held power tool for use in hand working operations including a hand pressure sensing element for adjusting the power of the tool. More specifically, the invention provides a hand engraving power tool that is activated from absence of power to much ... | 02/17/2004 |
| 6672403 | Method and apparatus for protecting a fluid-operated percussion device against no-load strokes Depending on the working and application conditions, it may be desirable to equip fluid-operated percussion devices with a mechanism that protects against no-load strokes, particularly in the interest of avoiding undesired stress. In the present case, thi... | 01/06/2004 |
| 6619407 | Air-operated hammer The subject invention pertains to an improved air-operated hammer which can utilize a pressurized air reservoir located near a pressurized air entrance of the hammer. This pressurized air reservoir can continue to receive pressurized air even when the ham... | 09/16/2003 |
| 6530435 | Apparatus for a hand-held pneumatic impact tool An apparatus for a hand-held pneumatic impact tool for use in fine hand working operations includes a handpiece, a foot-operated flow control valve with exhaust and two hand operated flow control valves. The handpiece includes a housing having a cavity an... | 03/11/2003 |
| 6520266 | Percussion electrical hand-held tool A percussion electrical hand-held tool including a housing (10), a percussion element (2) located in the housing, and a planetary gear unit (5) located in the housing (10) for converting a rotational movement (107) of the drive shaft (ω) of the hand-held... | 02/18/2003 |
| 6508315 | Small impact power tool A hand-held pneumatic impact tool for use in fine hand working operations includes a mechanism for adjusting impacting characteristics of the device that is conveniently located and adjusted by the user. The mechanism includes an annular band protruding a... | 01/21/2003 |
| 6488102 | Hand-held pneumatic impact power tool A hand-held pneumatic impact tool for use in fine hand working operations includes a mechanism for adjusting impacting characteristics of the device that is conveniently located and adjusted by the user. The mechanism includes an annular band protruding a... | 12/03/2002 |
| 6439317 | Device for breaking concrete The present invention provides a device for breaking up a paved surface which attaches to a host transport, such as a skid steer or backhoe, having a hydraulic power supply and preferably comprises a closed hydraulic system which includes a regenerative a... | 08/27/2002 |
| 6334495 | Fluid operated percussion device A fluid-operated percussion device (1) having a percussive piston (3), which alternately executes a work stroke and a return stroke due to the effect of a control. To avoid no-load strikes, in one embodiment of the percussion device (1), the percussive pi... | 01/01/2002 |
| 6315060 | Collet assembly for power tools A collet assembly is provided that securely holds tool bit shafts therein while allowing them to be readily and easily interchanged. The collet assembly herein has a very few number of parts and is easily assembled without the need for any special tools o... | 11/13/2001 |
| 6095256 | Hand-held pneumatic impact tool and method of controlling the same A hand-held pneumatic impact tool and method of controlling the same for use in fine hand working operations includes a handpiece, a foot-operated flow control valve and a hand operated flow control needle valve. The handpiece includes a housing having a ... | 08/01/2000 |
| 6029753 | Increased efficiency percussion piston and method for operating same A percussion piston for use in a drilling apparatus includes a drill bit and at least three tubular parts which increase in diameter in a direction extending from the drill bit toward a rear end of the piston. The piston further includes flanges positione... | 02/29/2000 |
| 5984021 | Porting system for back chamber of pneumatic hammer A pneumatic downhole impact drill has a porting system for automatically supplying pneumatic pressure fluid from a fluid delivery tube received within an axial bore in the impact piston to the opposite ends of the piston operating cylinder as the piston r... | 11/16/1999 |
| 5715724 | Adaptive, self-regulating forging hammer control system In forging hammers, according to the present invention, more than one inlet valve is employed and more than one exhaust may be employed. The force of impact for a particular blow is controlled by the number of valves employed and the timing of the opening... | 02/10/1998 |
| 5662175 | Sea water pile hammer A pile hammer for driving down hollow piles from an upper end thereof includes a hollow pile cap adapted to rest and support the hammer on a upper end of the pile being driven. The cap has an anvil surface for receiving blows from a ram which is slidably ... | 09/02/1997 |
| 5529132 | Hydraulic control circuit for pile driver A pile driver arrangement including a reciprocal impact member connected to a piston rod which is also connected to a reciprocal piston located in a hydraulic cylinder having a lower rod end and an upper blind end. A hydraulic fluid tank and a pump for su... | 06/25/1996 |
| 5515930 | Handheld pneumatic power tool apparatus A handheld pneumatic power tool apparatus is provided for use with a supply of pressurized air. The apparatus includes a handpiece and a pressure regulator assembly for regulating the pressure of air supplied to the handpiece. The handpiece includes a cyl... | 05/14/1996 |
| 5474138 | Hydraulic control circuit for pile driver A pile driver arrangement including a reciprocal impact member connected to a piston rod which is also connected to a reciprocal piston located in a hydraulic cylinder having a lower rod end and an upper blind end. A hydraulic fluid tank and a pump for su... | 12/12/1995 |
| 5419403 | Pneumatic hammer A pneumatic hammer is provided which includes a working piston (16) movable in a working cylinder (22) and defining therewith front and rear cylinder working chambers (23, 24, respectively). The working piston (16) impacts upon an anvil (15) to drive a dr... | 05/30/1995 |
| 5407017 | Hammer for removing gates or risers from castings An air-operated hammer is provided for removing risers or gates from castings. The hammer includes a piston having a rod to which an impact member is releasably latched. Operation of the piston is controlled by a pneumatic logic control circuit, the opera... | 04/18/1995 |
| 5086849 | Apparatus useful in driving electrical ground rods Three tubular elements are rigidly bundled together so as to have, in use, a common upper end elevation. The first element is closed at its upper end by a rigid cap element and depnds from the common upper end by approximately 30 centimeters (approximatel... | 02/11/1992 |
| 4951757 | Hydraulic striking device with impact frequency control In the hydraulic breaker according to the present invention, oil pressure at a fixed value always flows in the circuit at a low pressure side whenever the piston is raised or lowered, to prevent the need for an accumulator in the circuit at the low pressu... | 08/28/1990 |
| 4817737 | Hydraulic striking device with impact frequency control In the hydraulic breaker according to the present invention, oil pressure at a fixed value always flows in the circuit at a low pressure side whenever the piston is raised or lowered, to prevent the need for an accumulator in the circuit at the low pressu... | 04/04/1989 |
