"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 7992303 | Hair clipper with improved blade control structures An electric hair clipper with improved blade control structures for adjusting a scissors kit includes a combination housing provides a knob fitting portion, a pivot portion, an axial guiding slot, a motor receiving portion and a motor fixing portion. An adjusting kn... | 08/09/2011 |
| 7818884 | Shaving apparatus A shaving apparatus comprising a first shaving unit, including a first outer cutter (101,102) and a first undercutter (20) which cooperate together, a skin agitation member (12), a housing and a drive source (58) mounted in the housing. T... | 10/26/2010 |
| 7757404 | Personal trimming system A personal trimming system includes a main body having a motor and a part of a driving unit for converting a rotation of the motor into a reciprocating motion; and a head portion having a driven member moving in a reciprocating motion. The head portion is pivotably ... | 07/20/2010 |
| 7698820 | High speed link type reciprocating electric shaver Disclosed is a high speed link type reciprocating electric shaver in which an outer cutter and an inner cutter reciprocate in the right-to-left direction oppositely to each other so that reciprocating effect can be doubled due to only same vibration speed of a motor... | 04/20/2010 |
| 7464471 | Reciprocation type electric shaver In a reciprocation type electric shaver having an outside blade unit detachable from a main body, the outside blade unit comprises a main blade, a slit blade and an outside blade holder for holding the main blade and the slit blade capable of floating up and down. A... | 12/16/2008 |
| 7249416 | Comb-vibration preventing structure for hair cutter Disclosed is a comb-vibration preventing structure for a hair cutter including a cutter body and a cutting-length adjusting comb adapted to be fitted on an upper portion of the cutter body and vertically moved in a sliding manner so as to adjust a cutting length. Th... | 07/31/2007 |
| 7237339 | Dry shaving apparatus Dry shaving apparatus includes a drive source provided in a housing, a first shaving unit having a first outer cutter and a first undercutter coupled to the drive source and mounted for movement beneath the first outer cutter, and a second shaving unit having a seco... | 07/03/2007 |
| 7171751 | Electric shaver An electric shaver including first and second oscillators that convert rotational driving, which is supplied from a driving motor via joint portions that are connected to each other in a plurality of locations in the height direction of the shaver, into reciprocatin... | 02/06/2007 |
| 7022195 | Method of manufacturing inner blade for electric razor An inner cutter for a dry shaver is fabricated from a metal plate to have a plurality of blades each provided with cutting edges. The metal plate includes a plurality of parallel straight slits to leave an array of straight beams each defined between the adjacent on... | 04/04/2006 |
| 6958554 | Reciprocating linear actuator A reciprocating linear actuator capable of reciprocatingly driving a plurality of movable elements (2 and 2) by a single stator (1). The movable elements (2 and 2) are connected to each other through a connection body (3) ha... | 10/25/2005 |
| 6933630 | Drive mechanisms for small electric appliances A small electric appliance drive mechanism includes a first drive component, a second drive component, and a coil configured to produce a magnetic field extending from the first drive component and acting on the second drive component. The first drive component and ... | 08/23/2005 |
| 6886255 | Fixed head clipper and disposable blade assembly A hair clipper includes a handle portion having a drive end with a first coupler formation, and a blade assembly. The blade assembly includes a housing at least partially enclosing a reciprocating blade and a fixed blade, and having a top, bottom, and at least two s... | 05/03/2005 |
| 6684508 | Shaving head with drivable hair manipulator and drivable cutting member A shaving head comprises a cutting member a hair manipulator. The cutting member has a cutting edge which extends in a direction perpendicular to a shaving direction of the shaving head. The hair manipulator is arranged in front of the cutting edge, seen ... | 02/03/2004 |
| 6615492 | Dry shaving apparatus Dry shaving apparatus comprises a drive source provided in a housing; a first shaving unit (111) having a first outer cutter and a first undercutter coupled to the drive source and mounted for movement beneath said first outer cutter, and a second shaving... | 09/09/2003 |
| 6308414 | Dry shaving apparatus Dry shaving apparatus comprises a drive source provided in a housing; a first shaving unit (111) having a first outer cutter and a first undercutter coupled to the drive source and mounted for movement beneath said first outer cutter, and a second shaving... | 10/30/2001 |
| 6223438 | Dry shaving apparatus Dry shaving apparatus comprises a first individual shaving unit (111) having at least two first cutters cooperating together, including a first outer cutter and a first undercutter; at least a second individual shaving unit (112, 113) having at least two ... | 05/01/2001 |
| 6154962 | Head having elliptical blades for an electric shaver A head for attachment to the body of the electric shaver. The head comprises a guard comb that attaches to the body of the electric shaver, a rotary shaft that extends axially in the guard comb, a plurality of blades that are individual, parallels incline... | 12/05/2000 |
| 6098288 | Reciprocating-type electric shaver An electromagnetic linear actuator including a stator having an electromagnetic coil, and at least one movable element made of a permanent magnet or a magnetizable material and operable to reciprocate the movable element in a linear direction, and a cutte... | 08/08/2000 |
| 5704126 | Dry shaving apparatus with a pivotally mounted long-hair trimmer A dry shaving apparatus includes housing structure, a drive mechanism in the housing structure; at least two elongated cutter heads (SK1, SK2) that extend in longitudinal directions essentially parallel with each other, each cutter head comprising an oute... | 01/06/1998 |
| 5685077 | Electric shaver An electric shaver comprises a pivoting swing end, and an oscillator which is coupled to the swing end through a transmission. The transmission transmits a pivotal movement of the swing end to a horizontally reciprocating movement of the oscillator. An in... | 11/11/1997 |
| 5653025 | Thermally assisted shaving system A battery-operated thermal shaver is provided which includes an impeller for directing a stream of heated air to the line of contact between a razor blade and the hair to be cut by the shaver. The impeller is a fan located within an air chamber of the sha... | 08/05/1997 |
| 5564191 | Electric shaver An electric shaver having a shaving head which can pivot and be depressed into the housing of the shaver. The shaving head is mounted on pivot shafts that can be moved toward the inside of the shaver housing, thus allowing the shaving head to be pressed i... | 10/15/1996 |
| 5557850 | Reciprocal electric shaver A reciprocal electric shaver includes a pair of cutters which are reciprocated in mutually opposite directions by a drive mechanism. The drive mechanism includes a motor and a drive gear affixed to an output shaft of the motor. A pair of driven gears are ... | 09/24/1996 |
| 5490328 | Dry shaver A dry shaver has a housing with a head frame floatingly supporting an outer shearing foil. An associated inner cutter is driven to move in hair shearing engagement with the outer shearing foil. The head frame is formed with a stopper which is in use adapt... | 02/13/1996 |
| 5367771 | Electric shaver with two rows of outer blades A electric shaver of this invention has two rows of outer blade holders. These two rows of outer blade holders connect with links allowing independent vertical movement. The links connect with a frame in a manner allowing them to move freely up and down i... | 11/29/1994 |
| 5343621 | Shaving apparatus The invention is directed to an electric shaving apparatus having a housing and a shaving head assembly which is adapted to pivot relative to the housing about a pivotal axis Z and is comprised of a shaving head frame, a shaving plane formed by at least o... | 09/06/1994 |
| 5257456 | Shaving apparatus The invention is directed to an electric shaving apparatus having a housing and a shaving head assembly which is adapted to pivot relative to the housing about a pivotal axis Z and is comprised of a shaving plane formed by at least one outer cutter having... | 11/02/1993 |
| 5207731 | Electric shaver An electric shaver (1) is provided comprising a housing (2), a shaving head (5) comprising a shaving foil (7) and a cutter assembly (8) with cutter lamellae (19), and a motor (23) of the rotary type as well as a transmission mechanism (31) acting between ... | 05/04/1993 |
| 5201781 | Coupling for the cutter assembly of twin-head shavers The invention is directed to a dry shaving apparatus comprising a pair of parallel shaving heads having their inner cutters resiliently mounted on a common coupling member which is adapted to be coupled to the drive member of the electric drive by means o... | 04/13/1993 |
| 5193275 | Flat-shaped dry shaver A dry shaver has a flat casing mounting a flat cutter head composed of an outer shear foil and an inner cutter assembly. The inner cutter assembly is driven by a flat motor accommodated within the casing to reciprocate in hair shearing engagement with the... | 03/16/1993 |
| 5163227 | Exchangeable frame for a shaving apparatus The invention is directed to an exchangeable frame for the shaving head of a dry shaving apparatus, comprising two longitudinal frame members in parallel arrangement and end walls connecting the longitudinal frame members at their respective ends, as well... | 11/17/1992 |
| 5159755 | Hinged frames for a dry shaving apparatus The invention is directed to a twin-head shaver comprising a first hinged frame arranged in the shaving head frame and carrying the upper cutters, for control of a parallel relative movement of the upper cutters in the vertical direction, and a second hin... | 11/03/1992 |
| 5131148 | Electric shaver with flexible cutter holder The dry electric shaver includes a pair of movable cutter blocks reciprocatively movable by a drive bar with respect to a fixed perforated comb. The cutter blocks are coupled to the drive bar by a unitary one-piece plastic cutter support having a central ... | 07/21/1992 |
| 4922608 | Shaving apparatus with a pivoted shearing head system The invention is directed to an electric shaving apparatus having a housing (1), a drive assembly and a shearing head (2) movable about a pivot axis (Z) and including an arcuate short hair cutter assembly (K) and a long hair cutter assembly (L) associated... | 05/08/1990 |
| 4700476 | Shaver for a medical treatment preparation procedure An improved method and apparatus for preparing a body site prior to the application of medical treatment at the site is disclosed. The apparatus and method provide for the use of a hand-held, electrically-energized clipper having a disposable cutter head ... | 10/20/1987 |
| 4631825 | Washable electric shaver A washable electric shaver apparatus an outer blade frame of which is mounted on the top of the shaver so as to be movable by a limited distance away in parallel from the top of an outer casing in response to the depression of a pair of releasable push bu... | 12/30/1986 |
| 4619048 | Method for forming composite part comprising a plastic frame and a perforated metal foil A shaving head for dry razors in which a perforated shaving foil is connected to a plastic frame is produced by placing the shaving foil in an injection mould and holding it in thermal contact with the wall of the injection mould on one side while the pla... | 10/28/1986 |
| 4589205 | Inner cutter for electric shavers An inner cutter for electric shavers is disclosed. The inner cutter comprises a plurality of inner blades mounted on a base member to be driven to move in sliding engagement with an outer shearing plate having a number of perforations therein. Each inner ... | 05/20/1986 |
| 4575941 | Dry shavers An inner cutter for a dry shaver is formed from a tube of hardenable steel which is slotted transversely to form a series of bridge members on which individual teeth are formed by shallow annular grooves which locally reduce the thickness of the bridge me... | 03/18/1986 |
| 4570499 | Swing bridge In a swing bridge for conversion of rotary motion of an eccentric driven by a motor shaft into a reciprocating movement of the power output for a tool in electrically powered appliances, consisting of a bridge yoke comprising the power output and mounted ... | 02/18/1986 |