Bizarre Patents
An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 7293617 | Polycrystaline diamond compact insert reaming tool A reaming tool including a body adapted to couple to a drill string at both axial ends thereof, the body including a plurality of reaming blades affixed at azimuthally spaced apart locations around the circumference of the body, wherein selected ones of the pluralit... | 11/13/2007 |
| 7055829 | Antiextrusion device An elastomeric seal having an antiextrusion device molded integrally into or onto the low pressure side of the seal. The antiextrusion of a corrugated strip into an elastomeric seal. One embodiment of the invention has the strip positioned with the midplane of its c... | 06/06/2006 |
| 6406029 | Seal assembly having an encapsulated cone spring A seal ring having a frustoconical spring completely encapsulated within an annular body provides a bias force to an annular lip seal of the annular body to assure positive contact with an opposed face of an adjacently disposed member of a joint assembly.... | 06/18/2002 |
| 5772217 | Liquid pump seal A liquid seal unit having a seal ring with an annular end face cooperating with a seal mating ring on an associated component to form a liquid-tight dynamic seal. A composite multi-functional member with a flexible finger spring embedded in a unitary elas... | 06/30/1998 |
| 5605338 | Liquid pump seal A liquid seal unit having a seal ring with an annular end face cooperating with a seal mating ring on an associated component to form a liquid-tight dynamic seal. A composite multi-functional member with a flexible finger spring embedded in a unitary elas... | 02/25/1997 |
| 5513715 | Flat seal for a roller cone rock bit A flat seal (32) for a roller cone rock bit (10) is provided. Flat seal (32) includes a ring-shaped metallic spring (80). Metallic spring (80) has an inner face (88) with an annular inner edge (92) for contacting a sealing surface (72) of a cone (18) in a... | 05/07/1996 |
| 5348312 | Cassette seal A cassette seal for sealing off the gap between a bore hole and a shaft. The seal includes an inner ring which is secured to the shaft and has a groove open radially to the outside. The seal also includes an outer ring secured in the bore hole with a radi... | 09/20/1994 |
| 5192085 | Rubber drive system mechanical seal A mechanical seal particularly well suited to use in rotary equipment handling abrasive slurries. The seal comprises a split rotary face biased toward a split stationary face by a cone spring. The cone spring is encased in elastomeric material which inclu... | 03/09/1993 |
| 5161806 | Spring-loaded, hollow, elliptical ring seal A canted-coil spring-loaded ring seal assembly including a plurality of coils having a major and a minor axis and canted along a center line defined by an intersection of the major and minor axes along with an elastic material, disposed around and between... | 11/10/1992 |
| 5072951 | Pressure balanced mechanical seal assembly with encapsulated double-disk spring biassing element A mechanical seal arrangement for use in association with a pump casing structure and a drive shaft for driving a pump impeller which is housed in the pump casing structure. The mechanical seal arrangement has a rotatable seal ring with a seal face mounta... | 12/17/1991 |
| 5011164 | Double-disk, spring-biased mechanical seal assembly A mechanical seal arrangement for use in association with a pump casing structure and a drive shaft for driving a pump impeller which is housed in the pump casing structure. The mechanical seal arrangement has a rotatable seal ring with a seal face mounta... | 04/30/1991 |
| 4822057 | Mechanical face seal for rock bits A metal-to-metal Belleville seal for a rotary cone rock bit consists of pre-lapped metal sealing surfaces formed on opposing seal rings prior to assembly of the seal rings into seal cavities formed between the rotary cones and their respective journal bea... | 04/18/1989 |
| 4722404 | Drill bit bearing seal The invention includes a low-friction seal assembly for use with a rotary drill bit having bit cutters manufactured by casting. The seal assembly includes a seal element having a bellville spring element surrounded by an elastomeric material. The seal ele... | 02/02/1988 |
| 4703939 | Mechanical seal with radially disposed bias component A mechanical seal assembly disposed within a pump housing for retarding the flow and leakage of fluids and other matter from being pumped along the motor drive shaft. The mechanical seal assembly of the present invention includes a non-rotating seal ring ... | 11/03/1987 |
| 4632401 | Hermetically welded belleville seal for rock bits A belleville seal for a sealed bearing rotary cone rock bit. The inner static ring portion of the annular belleville seal is metal and is interference fitted over the base of a journal bearing. The separation joint formed between the inner diameter of the... | 12/30/1986 |
| 4560175 | Hermetically welded belleville seal for rocks bits This invention relates to a belleville seal for a sealed bearing rotary cone rock bit. The inner static ring portion of the annular belleville seal is metal and is interference fitted over the base of a journal bearing. The separation joint formed between... | 12/24/1985 |
| 4392657 | Belleville spring loaded seal Sealing structure (10,110) for a sealing a first joint member (11,111) to a second joint member (12,112) across a variable space therebetween. The sealing structure includes a frustoconical Belleville spring (17,117) and an annular support spring (18,118)... | 07/12/1983 |
| 4319757 | End face thrust seals An end face thrust seal, particularly for an automobile water pump, and comprising an annular elastomeric ring having inner and outer rims interconnected by a frustoconical portion. A diaphragm spring is embedded in the elastomeric ring so that the outer ... | 03/16/1982 |
| 4214764 | Axial-type sealing device arranged to provide the seal between a stationary and a rotatable element A sealing device arranged to provide the seal for a fluid, in particular a liquid, between an ambient and the inside of a cavity comprised between a stationary member and a rotating member is described. The main feature of this sealing device is that it compri... | 07/29/1980 |
| 4061345 | Seal for a rotating shaft Seal for the purpose of carrying a rotating shaft throught a wall and which comprises a rotating seal ring and a stationary seal ring abutting thereagainst, whereof one has been connected with the shaft and the other with the wall and whereof one is locat... | 12/06/1977 |
