Matches 1 - 50 out of 59 1 2 >
Match Document Document Title
7080950 Pencil with buffering effect for preventing a pencil lead from breaking  
A pencil with buffering effect for prevent a pencil lead from breaking comprises a head tube; a stepped element installed within the head tube and resisting against a front end of the spring; a...
6854909 Lead propelling device  
The lead propelling device of the invention is a lead propelling device having a structure for gripping and releasing the lead by a lead gripping mechanism by knocking operation, not transmitting...
6783292 Double-chuck mechanical pencil  
A double-chuck mechanical pencil comprises a barrel, a barrel cap detachably attached to a front end of the barrel, a lead tank inserted in the barrel, a feed chuck for feeding leads, combined with...
6517272 Double-chuck mechanical pencil  
A double-chuck mechanical pencil having a front lead chuck for holding a lead and a back lead chuck for advancing a lead which is composed of a barrel, a lead tank connected to the back lead chuck,...
6334728 Double-chuck mechanical pencil  
A double-chuck mechanical pencil includes a barrel having an open front end part, an inner tube inserted in the barrel, a front chuck having a first chucking head and supported on a front end part...
6247863 Press type mechanical pencil  
A press type mechanical pencil includes an upper barrel, a press device, a refill tube, an abutting rod, a clamp/release device and a lower barrel. An insert post of the clamp/release device has a...
6203226 Side-knock type mechanical pencil  
A side-knock type mechanical pencil comprising a barrel having an opening in a side wall, a chuck mechanism housed in the forepart of the barrel, a slider moved back and forth within the barrel to...
6089775 Retractable-lead mechanical pencil  
A slider type mechanical pencil has an outer tubular member having a front end and a rear end. An inner tubular member is disposed in the outer tubular member for axial movement therein and has a...
6039484 Writing instrument  
A writing instrument comprises a barrel provided with a tip element at the front thereof, a writing mechanism provided longitudinally movably within the barrel, a resilient element for biasing the...
5846009 Writing tool  
A writing tool in which flexible pieces 24a projecting diametrically outward are provided in sleeve 24 of writing shaft body 11, while holding holes 10a are provided in outer case 10. By inserting...
5340224 Push-type writing instrument  
A push-type writing instrument, particularly a pencil, includes a retaining collar downwardly protruded from a pair of radially opposed fingers provided on a tapered forward portion of an outer...
5052838 Mechanical pencil  
A mechanical lead pencil having the capability of feeding different diameter leads. A first collet is disposed in the pencil barrel for feeding the lead and a second collet is located at the barrel...
5022772 Rotary knock type mechanical pencil  
A rotary knock type mechanical pencil in which the forward and rearward outer cylindrical are relatively rotated, a cam movement converting mechanism stored in the forward outer cylinder converts...
5004362 Mechanical pencil  
A mechanical pencil which employs the concept of inverting the configuration of a conventional mechanical pencil by designating the depressible end as the writing end and the stationary end as the...
4979839 Mechanical pencil having an automatic lead extending mechanism  
A mechanical pencil having an automatic lead extending mechanism which has a radially displaceable member disposed on an entire circumference of the pencil body. The lead protrudes from a tip end...
4872776 Lead chuck of mechanical pencil  
A lead chuck of a mechanical pencil to be assembled into a lead feeding mechanism of a rear end knock type, an automatic lead feeding type and an extremity end knock type mechanical pencil in which...
4840508 Mechanical pencil capable of automatically propelling successive lengths of lead  
A mechanical pencil has a body with a lead storage chamber defined therein for housing spare lengths of lead, and a tubular lead guide receiving a length of lead and coaxially mounted in the body...
4838721 Automatic lead advance for mechanical pencils  
An automatic lead advance for a mechanical pencil having a tubular casing, a conical member joined to the front end portion of the tubular casing, a ring fixed to the inner surface of the conical...
4729684 Mechanical pencil  
Mechanical pencil in which a chuck assembly for gripping a lead is formed with plural chuck elements mutually combined with each other. The chuck assembly has an internal longitudinal hole to...
4720203 Push-button type mechanical pencil  
A push-button type mechanical pencil consisting of a barrel which is composed of a clip-carrying upper barrel member and a metal tip-carrying lower barrel member, which barrel members are engaged...
4705419 Mechanical pencil with automatic lead advance  
A mechanical pencil for automatic drawing machines is disclosed which feeds lead segments to the writing surface as the pencil is alternately pressed against and lifted from the writing surface....
4663846 Cutter having a retractable and removable blade  
A blade is removably supported on one end of a shank which is axially movably disposed in a tubular holder. The shank has an axially extending slit terminating at the end thereof for supporting the...
4659327 Multiple dosage syringe  
A multiple, metered dosage device having an elongated body provided adjacent one end with a compartment or an ampule to contain material to be dispensed, a piston movable against the material to...
4650359 Mechanical pencil with automatic lead advance  
A mechanical pencil having a chuck mechanism which permits the lead to advance but prevents the lead from retracting, a first slider, a second slider which is retractable progressively as a writing...
4627756 Lead propelling mechanism for a mechanical pencil  
A lead propelling mechanism for a mechanical pencil includes a lead chuck, a ring fitted loosely about the chuck for tightening its head, a sleeve having a front end contacting the ring, and an...
4595306 Pencil with sharpener  
An automatic pencil with a lead-sharpening device, has a pencil lead of a diameter of 2 mm inserted into the pipe sleeve of the pencil case in which a lead-sharpening knife holder is attached....
4573817 Mechanical pencil  
A mechanical pencil having a cylindrical barrel (1) and a sheath (2) in axial relationship is disclosed. A spiral member (4) in fixed relationship with the sheath and in axially sliding...
4571105 Lead engaging chuck mechanism for mechanical pencil  
A chuck mechanism incorporated in a mechanical pencil has a plurality of chuck elements in a longitudinal confronting relation. The chuck elements have a pivotal support or fulcrum at their...
4544295 Mechanical pencil with self-contained insert  
A mechanical pencil comprising a pencil barrel, a cam cylinder mounted in the pencil barrel at a front portion thereof and having a cam wall formed on an inner circumferential surface, a...
4538934 Automatic lead advancing mechanism for a mechanical pencil  
An automatic lead advancing mechanism for a mechanical pencil has at its writing point a lead guide tube which is movable axially against a clamping member to cause radially movable components of...
4500220 Mechanical pencil with removable lead feed cover  
A mechanical pencil includes a removable tubular cover which has functions to protect a tip of the pencil and also to advance automatically the lead therein a tiny increment to project from the...
4490061 Writing instrument for automatic advancement and feed of leads  
A writing instrument with automatic advancement and feed of successive leads has a housing having a tip part, a lead protecting pipe having an axis and movable in an axial direction, a lead...
4478529 Writing implement with automatic lead projection  
A propelling or automatic writing implement having a lead which can be projected from the implement without pushing. An inner frame having a chuck assembly for permitting advance of the lead but...
4452544 Mechanical pencil with automatic lead feed  
A mechanical pencil with automatic lead feed has a clamping mechanism for clamping a lead in such a manner that it holds the lead steadily against rearward movement but easily permits the lead to...
4386865 Automatic sharp pencil  
A knock type sharp pencil provided in its outer cylinder with a core holding mechanism composed of an inner cylinder coaxially arranged in the outer cylinder, a lead chuck inserted in the inner...
4382706 Mechanical pencil  
A mechanical pencil including a main body divided into first and second members which are rotatable relative to one another. An inner mechanism is provided, primarily in the first member of the...
4358210 Mechanical pencil with chuck closing by normal writing grip  
A mechanical pencil in which the lead is advanced by squeezing a cylindrical depression member provided at the position of the writer's fingers during normal writing operations. The pencil includes...
4346392 Plotting head for use in drawing machine  
A plotting head for use in a drawing machine comprising a housing attached to said drawing machine; a lead holding means installed for vertical movement within said housing and having a vertical...
4343558 Mechanical pencil  
A mechanical pencil including a buffer spring is disclosed. The mechanical pencil has a chuck whose chucking point is elongated in the direction towards the front of the pencil so that if the lead...
4264227 Press-out type writing tool  
A press-out type writing tool having a holder body and a mechanism disposed in the holder body for pressing out pencil lead. The mechanism includes a depressing tube, a chuck for clamping the lead...
4240759 Mechanical pencil having guides to match guides on a refill cartridge  
A mechanical pencil includes a casing, a chuck for holding a lead, a lead passage connected with the chuck, a lead cartridge and a push button for advancing the lead. A cylindrical body is...
4230413 Mechanical pencil having collet guide  
A mechanical pencil of the type in which a lead is gripped in a collet clamped about the lead by engagement between cooperating conical faces of a clamping ring and respective movable ends of two...
4205924 Mechanical pencil with lead-feeding device operable by forward shake of pencil  
A lead-feeding mechanism comprising a lead reservoir, a connector, and a chuck in a mechanical pencil is held by a front spring in a normal rear position, at which the chuck is clamping a lead...
4180339 Mechanical pencil with automatic lead feed  
A mechanical pencil with a lead feed, automatically produced by pressure during use of the pencil, comprises a tubular lead magazine closed at an outer end by a removable actuating button and being...
4172673 Writing instrument using thin refill leads  
A writing instrument for thin lead refills comprising a housing and a lead feed mechanism located within the housing and wherein the feed of the lead refills is effected by a lead collet slidable...
4149813 Mechanical pencil with automatic and manual lead advance  
A mechanical pencil has an axially elongated hollow pencil body in which is slidable a tubular seat member. A lead-protecting sleeve is axially displaceable in the pencil body between a front...
4106874 Mechanical pencil  
A mechanical pencil having a mouth piece 5 extendable and retractable in and out of the end portion 3 of a main body 1, and a tip sleeve 14 extendable and retractable in and out of the end portion...
4003664 Mechanical pencil with lead feed responsive to writing pressure  
A mechanical pencil, especially for thin leads, in which a tubular guide projects from and is guided for movement in axial direction in one end of a tubular casing. Lead is automatically advanced...
3914059 Mechanical pencil  
A mechanical pencil has a lead container movably incorporated therein. The lower terminal portion of the pencil proper contains a lead protecting tube through which the lead extends in light...
3892495 Push type mechanical pencil  
A push type mechanical pencil with which a user can push out a lead with a fingertip work while keeping a writing posture and a grasping position unchanged. In this mechanical pencil, a hole is...
Matches 1 - 50 out of 59 1 2 >