Bizarre Patents
A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7458356 | Spring apparatus and valve train of internal combustion engine using the same A bellows unit and a compression coil spring are located in series with each other between a first member and a second member. The bellows unit has an inner bellows, an outer bellows, and first and second end members. A sealed space is defined in the bellows unit. A... | 12/02/2008 |
| 7134410 | Detachable connection for coupling a gas exchange valve of an internal combustion engine to an actuator Disclosed is a simple, easy-to-produce, and reliable connection between a shaft of a gas exchange valve and an actuator. This connection is detachable and, as a result, can be connected and disconnected multiple times. It is also possible to dispose the coupling pie... | 11/14/2006 |
| 6789790 | Helical coil spring damper assembly A device for reducing the resonant vibrations of a helical valve spring of an internal combustion engine includes a member, such as a tension cable, attached between one end of the spring and a coil mid-section of the spring for limiting the movement of the coil mid... | 09/14/2004 |
| 6341588 | Valve spring retainer and a valve operating mechanism A valve spring retainer is mounted to the upper end of a poppet valve via a pair of cotters in an internal combustion engine of an automobile. The valve spring retainer has an intermediate portion and an outer flange which is engaged with the upper end of... | 01/29/2002 |
| 6338325 | Valve operating mechanism of an internal combustion engine To operate a poppet valve in an internal combustion engine, a valve operating mechanism comprises a valve spring retainer which has a taper bore, a pair of cotters which is inserted in the bore to support the poppet valve, and a valve spring between the v... | 01/15/2002 |
| 6311661 | Valve spring retainer and a valve operating mechanism A valve spring retainer is mounted to the upper end of a poppet valve via a pair of cotters in an internal combustion engine of an automobile. The valve spring retainer has an intermediate portion and an outer flange which is engaged with the upper end of... | 11/06/2001 |
| 6293240 | Valve spring retainer and a valve operating mechanism A valve spring retainer is mounted to the upper end of a poppet valve via a pair of cotters in an internal combustion engine of an automobile. The valve spring retainer has an intermediate portion and an outer flange which is engaged with the upper end of... | 09/25/2001 |
| 6279526 | Valve gear for an internal-combustion engine A valve gear controls a gas exchange in an internal-combustion engine with a valve spring which holds a valve in its required position at all times and is clamped between a valve head and a valve-spring support. The valve spring support is adjustable in t... | 08/28/2001 |
| 6082315 | Electromagnetic valve actuator An electromagnetic valve actuator is disclosed. The actuator includes an upper electromagnet and a lower electromagnet placed in a mirror relationship to each other about a central vertical axis, an armature element disposed intermediate the upper and low... | 07/04/2000 |
| 5873563 | Valve Lock An improved valve lock comprises a plurality of tapered arcuate sections that fit together to provide a sleeve that fits on the tip of a valve stem, with the inner surfaces of the arcuate sections having raised ridges thereon that mate with corresponding ... | 02/23/1999 |
| 5619961 | Poppet valve retainer system for internal combustion engine A retainer system for securing a poppet valve within a cylinder head of an internal combustion engine includes a retainer washer having a tapered bore, and a valve stem having annular grooves with different axial lengths which match lands formed on the in... | 04/15/1997 |
| 5596964 | Intake and exhaust valves and intake port of internal combustion engine Each of intake and exhaust valves of an internal combustion engine has a valve retainer provided with a center hole through which the upper portion of each valve stem passes, a flange and a raised portion surrounded by the flange and around the center hol... | 01/28/1997 |
| 5497740 | Ceramic valve for internal combustion engines having a reduced tendency to stress fracture The invention concerns a ceramic valve for internal combustion engines whose spring retainer is frictionally linked to the valve stem, and whose cylindrical valve stem (2) is surrounded by a collet (3) having a conical outer profile (4). The spring retain... | 03/12/1996 |
| 5381765 | Valve spring retainer A keyless valve spring retainer for an internal combustion engine. The valve spring retainer has a high load strength yet can be easily assembled or unassembled on a valve stem. It includes a curved arm portion which permits the spring retainer to be loca... | 01/17/1995 |
| 5357918 | Valve operating mechanism for internal-combustion engines A valve operating mechanism for internal-combustion engines has a valve and a pressure spring which is to move the valve into a closed end position and which is supported on a spring plate. For the reduction of the valve operating masses, at least the val... | 10/25/1994 |
| 5322039 | Valve spring top collar A valve spring top collar is formed by a unitary body having a circular top face and a bottom surface, with a first circular shoulder extending downwardly from the bottom surface of the body and a second inwardly spaced circular shoulder. The shoulders ar... | 06/21/1994 |
| 5293848 | Spring retainer for a poppet valve and method of assembling A spring retainer (10) for a poppet valve (18) which is biased by a valve spring (16) and a method of assembling the spring retainer (10) the poppet valve (18) and a valve spring (16). The spring retainer (10) has first and second body portions (30, 32). ... | 03/15/1994 |
| 5255640 | Bi-plastic self-locking valve spring retainer A self-locking valve spring retainer (30) operatively retaining a return spring (28) on the stem (20) of a poppet valve (16) comprises an annular base ring (48) from which three flexible arms (52) upwardly extend. A locking step (66) projects radially inw... | 10/26/1993 |
| 5072950 | Valve stem assembly A valve stem seal assembly comprises a valve stem seal having an external flange and a sealing lip, a washer having a tapered axial bore therein, a spring extending between the external flange of the seal and the washer, and a member engaging the seal and... | 12/17/1991 |
| 4977869 | Valve assembly for internal-combustion engines Valve assembly (22) intended for closing a combustion chamber (14) of an internal-combustion engine and comprising a valve (36) and a valve seat (42), the valve lifting off from its seat in order to open the combustion chamber (14) by moving away from the... | 12/18/1990 |
| 4879978 | Poppet valve spring retainer An engine (10) is provided including a poppet valve (14) for regulating the flow of gases to and from a combustion chamber (13). The poppet valve (14) includes an elongated stem (18). A return spring (20) is connected to the stem (18) and urges the poppet... | 11/14/1989 |
| 4665869 | Valve spring retainer and process for its production In order to adjust the fiber orientation of a valve spring retainer made of arbon fiber reinforced synthetic material to the stresses appearing in practical operation, it is suggested that several stacked carbon fiber tissue layers be bedded into the valve... | 05/19/1987 |
| 4653726 | Valve spring retainer/locking assembly A valve spring retainer and locking assembly comprising a locking member which is made screen-like and engages at least one peripheral groove of a valve stem end in a manner known per se employing a bulge, and is pressed against the valve stem end via a c... | 03/31/1987 |
| 4590900 | Valve supporting arrangement of an internal combustion engine The upper retainer for retaining an upper portion of a valve spring is shaped like a perforated spinning top and is axially dividable into two identical elements which are coaxially disposed about the upper portion of the valve stem when assuming its oper... | 05/27/1986 |
| 4538563 | Helical coil spring damper assemblies An improved spring damper assembly is disclosed which comprises a helical coil spring having a generally cylindrically shaped sleeve member fitted thereto. The sleeve member has resilient sidewall portions which are designed to frictionally engage surface... | 09/03/1985 |
| 4515346 | Valve spring retainer assembly A valve spring retainer assembly includes a valve stem for reciprocation with respect to an engine head. A valve spring retainer provides a thrust surface against which a valve spring biases the valve stem into a closed position. The retainer includes an ... | 05/07/1985 |
| 4432311 | Composite valve spring retainer and process A lightweight composite valve spring retainer is provided to decrease fuel consumption, attenuate noise, and permit increased speed of operation.... | 02/21/1984 |
