Famous Patents
The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 7294222 | External pipe cleaner Disclosed is a pipe cleaner apparatus that is attached to a pipe fusion machine. The pipe cleaner removes dirt, snow, mud, and other debris from the outer surface of pipe sections prior to the butt fusion process. The pipe cleaner may be a wiper through which the pi... | 11/13/2007 |
| 7017915 | Stem or shaft seal arrangement An improved seal arrangement in an assembly such as a valve assembly in which a compression member is provided to press a seal between the compression member and the valve body. In a preferred form, the compression member includes a recess which receives a first por... | 03/28/2006 |
| 6098986 | Seal A seal (14) for use between a pair of substantially concentric elements (10 and 11) capable of relative movement with respect to each other, said seal comprising a sealing element (17) having a configuration of a helix wherein the opposed axial faces of t... | 08/08/2000 |
| 5927685 | Sealing device for a valve stem of a valve A valve includes a column having an outer end portion defining a threaded bore, an outer mediate portion defining a first receiving recess communicating with the threaded bore, an inner mediate portion defining a passage communicating with the first recei... | 07/27/1999 |
| 5711535 | Valve spool seal with one-piece housing ring having an arcuate side wall and a stepped side wall An annular sealing unit for multiway valves. It comprises an integral housing ring, wherein an elastic sealing element is arranged. The housing ring possesses a cylindrical holding wall for attachment in a recess in the valve housing with a press fit. Fur... | 01/27/1998 |
| 5599173 | Blood pump system A pump system is described which is particularly suited for use as a left ventricular assist device for internal use in humans. The pump system generally includes a pump having a deformable sac formed in a seamless piece of flexible resilient material hav... | 02/04/1997 |
| 5524902 | Method and cartridge seal for packaging a valve A packing system, for providing a seal around a valve stem, including a packing cartridge and a bushing. The packing cartridge includes a sleeve which has a tapered central passage. The sleeve also has external male threads and a hex head. Packing materia... | 06/11/1996 |
| 5346037 | Packing nut and rod guide for piston paint pumps A combined packing nut and rod guide for piston paint pumps has a body with a central bore therethrough and at least one relief extending axially along the bore providing a lubricating passageway and paint leakage path. An annular reservoir is formed at a... | 09/13/1994 |
| 4967785 | Valve actuator A valve actuator is disclosed which is encased in a housing with a bonnet mounted at one end and an end cap on the other end. Inside, an actuator shaft is slidably mounted through a bore on a guide connected to the bonnet. A piston is slidably mounted wit... | 11/06/1990 |
| 4911202 | Valve construction A hot and cold water control valve having a body for supporting first and second liquid conduits having respective first and second valve closure members. Each of the valve closure members has an actuating member controlled by a handle that is secured to ... | 03/27/1990 |
| 4778150 | Non-rotating stem valve A rising stem valve comprising a valve body, a two part valve stem and a stem guide washer. The valve body has a valve seat in a passage between an inlet and outlet port. The two part valve stem comprising a rotating stem and a non-rotating stem and the r... | 10/18/1988 |
| 4729673 | Add-on bearing protector A bearing protector apparatus inserted on a rotating shaft between a machine housing and its original bearing assembly. The invention comprises a cylindrical body which is attachably bolted to the housing of the machine and, in turn, having attached to it... | 03/08/1988 |
| 4516752 | Mechanically preloaded packing assembly A pressure energized mechanically preloaded packing assembly (48, 68) of a high pressure gate valve (10). The packing assemblies are positioned in an annular space about the valve stems (36, 64) for sealing between the valve stems and bonnet (38) or valve... | 05/14/1985 |
| 4480841 | Apparatus and method for sealing a tube joint An apparatus for sealing a joint between two substantially collinear tubes (12,14) is provided. Particularly useful for repairing a welded joint which has developed a crack (20) in the area of the weld (18), the apparatus provides a sleeve (26) which fits... | 11/06/1984 |
| 4327586 | Stuffing box for introducing instrument into high pressure conduit A stuffing box comprising a housing member having a threaded passage therethrough and having an internally threaded recess, an externally threaded stem which is threaded into and passes through the threaded passage, a gland nut which is disposed in said r... | 05/04/1982 |
| 4205767 | Cannula injection device An injection device for use with a fluid transporting cannula and a female fitting for a liquid system. The cannula is surrounded by a first sleeve which in itself is surrounded by a second sleeve. The end portion of the second sleeve places within the fe... | 06/03/1980 |
