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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 8181970 | Unitized bi-directional seal assembly A seal assembly is provided including a pair of end rings axially spaced from one another. A pair of annular seals are each engaged with a respective one of the pair of end rings. A locking ring is engaged with each of the pair of annular seals to connect the opposi... | 05/22/2012 |
| 7314218 | Externally mountable spiral adaptor An adaptor that can be used with rotary fluid equipment will protect mechanical seals and/or packing material adjacent a seal cavity (18) of the equipment. The adaptor includes an annular body (30) with a central bore (32) adapted to receive a s... | 01/01/2008 |
| 7193156 | Cable bushing A cable bushing which is small, simple and cost-effective as possible, having a cable, a housing, through which the cable is led, and which has a radially inwardly extending step at its first end, a first sleeve, which engages around the cable and which has a first ... | 03/20/2007 |
| 7121551 | Bushing arrangement for seal cavity protection in rotating fluid equipment An arrangement (120) of members for a throat bushing for rotary fluid equipment includes a first member (122) that is useful for seal cavities that contain conventional packing, and a second bushing member (132) that will be used in conjunction ... | 10/17/2006 |
| 7118114 | Dynamic sealing arrangement for movable shaft A dynamic sealing arrangement for preventing leakage of a fluid along a shaft includes multiple seals and pressurized barrier sealant. According to one aspect, at least three seals are arranged along the shaft with pressurized barrier sealant between the first and s... | 10/10/2006 |
| 7108058 | Packing assembly for rotary drilling swivels and pumps having rotating shafts A packing assembly for use with a rotary drilling swivel having a cylindrical wash pipe comprising a housing assembly including a packing gland forming a sealing assembly chamber around the wash pipe, the packing gland including an injection port in open communicati... | 09/19/2006 |
| 6834862 | Shaft sealing system for a rotary mechanical device A sealing system to be inserted into the seal cavity of a rotary mechanical device to provide a seal and a bearing surface to eliminate whip in a rotating shaft. The sealing system includes a split bushing element to allow easy installation over the shaft. The bushi... | 12/28/2004 |
| 6721381 | Seal arrangement for in-core instrument housing A seal arrangement for providing a seal between a nuclear reactor in-core instrument housing and an instrument contained within the housing includes a lower seal assembly surrounding an outer portion of the in-core instrument housing, an upper seal assembly surround... | 04/13/2004 |
| 6522708 | Seal arrangement for in-core instrument housing A seal arrangement for providing a seal between a nuclear reactor in-core instrument housing and an instrument contained within the housing includes a lower seal assembly surrounding an outer portion of the in-core instrument housing, an upper seal assemb... | 02/18/2003 |
| 6504888 | Apparatus and methods of flow measurement for a boiling water reactor internal pump A reactor pressure vessel (RPV) for a nuclear reactor that permits measurement of the flow through each reactor internal pump (RIP) is described. The reactor pressure vessel also includes at least one reactor internal pump that includes an impeller and a ... | 01/07/2003 |
| 6382633 | Shaft seal device using gland packing A shaft seal apparatus that exhibits a good and reliable sealing performance, even when a rotating shaft undergoes axial vibration, eccentric revolution, or the like. This shaft seal apparatus has gland packings (2) stuffed in a sealed space (10) formed b... | 05/07/2002 |
| 6126171 | Sealing cartridge An improved sealing cartridge for use in a reciprocating plunger pump which includes a low pressure seal, a vacuum seal, and an oil seal within a unitized cartridge assembly to facilitate servicing and/or replacing the various seals with minimal effort an... | 10/03/2000 |
| 6062570 | Stem sealing system for broad temperature ranges A stem seal having first and second wiping members circumjacent a stem is disposed within a bore. A lubricant-bearing ring is disposed about the stem within the bore between the wiping members, under compression therefrom. Projections from the wiping memb... | 05/16/2000 |
| 5979483 | Valve assembly and method Disclosed is a valve assembly having a slidable valve stem that passes through a bushing enclosed in a bonnet. At least one circumferential stem seal seals the valve stem to the bushing. At least one passageway is provided through the bushing for injectin... | 11/09/1999 |
| 5921554 | Anti-pack out seal An anti-pack out seal for use between fluid containing cylinders and pistons which are axially slideable therein and which extend through an opening in the end of such pistons. This seal has an annular channel adjacent to a resilient elastomeric seal ring... | 07/13/1999 |
| 5772218 | Uniform compression gland seal assembly A gland seal assembly for a slurry pump comprising a main body having a bore therethrough for receiving a rotatable shaft, a packing receiving zone within the bore, the packing including at least two packing rings and a packing sleeve surrounding the pack... | 06/30/1998 |
| 5730446 | Sealing strip suitable for sealing a hem flange A sealing strip (5) for a hem flange between two panels (for example, the inner and outer panels (1, 3) of a vehicle door) comprises an inner portion (9) of a tacky, sealing material with an outer part (10) of a non-tacky material, providing the strip wit... | 03/24/1998 |
| 5647598 | Stuffing box seal having braided packings and lip seal rings in combination with a shaft sleeve A sealing device for a shaft rotating relative to a frame, particularly for a pump shaft, wherein a protective sleeve surrounding the shaft is fixedly mounted for rotation with the shaft; a collar step surrounding the sleeve is fixedly mounted on the fram... | 07/15/1997 |
| 5642892 | Gland seal assembly housing A housing for a gland seal assembly, the housing comprising a main body having a bore therethrough for receiving a rotatable shaft. The main body includes first and second parts each having a packing receiving zone within the bore, each of said first and ... | 07/01/1997 |
| 5636688 | Self aligning stuffing box for pumpjack units A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of a borehole. The stuffing box has a main body that terminates in a tubing adaptor a... | 06/10/1997 |
| 5636849 | Translatable bearing stuffing box The invention relates to a diffuser (1), comprising a substantially cylindrical, vertical container (2), through which cellulose pulp is arranged to be transported, nozzle arms (6, 7) for delivering a fluid, such as washing liquid, to the pulp, concentric... | 06/10/1997 |
| 5593166 | Low friction packing A two-part, low friction, live loaded packing system for fire safety and low fugitive emission sealing (less than 500 ppm) of a valve stem at operating temperatures up to 450° F. (232° C.). One lower packing ring set around the valve stem has PTFE washe... | 01/14/1997 |
| 5538080 | Self aligning stuffing box for pumpjack units A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of a borehole. The stuffing box has a main body that terminates in a tubing adaptor a... | 07/23/1996 |
| 5356157 | Internal live loading packing gland Live loading is applied on each end of both the secondary and the primary packing of a packing gland. After installing the primary packing assembly and a lantern ring, the primary packing is compressed to proper specifications. While the primary gland is ... | 10/18/1994 |
| 5305854 | Stuffing box lubricator Apparatus for lubricating pistons having a pressure metered lubrication reservoir in fluid flow attachment with the piston through a lantern port in the wall of the stuffing box surrounding the piston. A check valve in fluid flow alignment between the stu... | 04/26/1994 |
| 5290046 | Internal live loading packing gland Live loading is applied on each end of both the secondary and the primary packing of a packing gland. After installing the primary packing assembly and a lantern ring, the primary packing is compressed to proper specifications. While the primary gland is ... | 03/01/1994 |
| 5230498 | Live load packing system An improved live load packing system for sealing an operating valve member in a fluid valve A packing follower includes a base and a guide sleeve adapted for slidable engagement on the operating valve member. A series of Belleville disk springs slidably e... | 07/27/1993 |
| 5171022 | Shaft seal of a mixing and kneading machine A sealing arrangement is provided between the shaft of a mixing tool and the wall of a housing of a mixing and kneading machine, the sealing arrangement having a housing liner and a gland member which can be axially displaced against a support ring arrang... | 12/15/1992 |
| 5129625 | Live load packing system An improved live load packing system for sealing an operating valve member in a fluid valve. A packing follower includes a base and a guide sleeve with a non-metallic inner liner adapted for slidable engagement on the operating valve member. A series of B... | 07/14/1992 |
| 5056757 | Packing containment for live loaded fugitive emission seals A fluid valve for use in high pressure and high temperature operating conditions where the operating fluid is chemically reactive. V-type PTFE packing members are backed up with anti-extrusion wiper rings of silica filled PTFE or barium sulfate filled PTF... | 10/15/1991 |
| 5024453 | Liveload assembly for rotary or reciprocating shaft packing A liveload assembly including an stack guide, compressed belleville washers stacked inside the stack guide and a retainer to hold the compressed washers in the stack guide. A longitudinal slot in the wall of the stack guide permits visual checking of the ... | 06/18/1991 |
| 5014998 | Shaft seal A shaft seal for sealing a rotating shaft relative to a panel or wall of a device from which the shaft extends. The shaft seal has a tubular housing including a packing gland for shaft packings which is floatingly mounted to a wall or panel of the device ... | 05/14/1991 |
| 5013053 | Universal seal cage lantern ring with double-sided slotted land structure A universal seal cage lantern ring (USCLR) is provided with a slotted land type structure on both sides of a flexible central web, with the USCLR being constructed in a continuous undefined length, so that lantern rings can be cut to size therefrom, with ... | 05/07/1991 |
| 4981174 | Leakproof stuffing box with external lubrication for polish rod A stuffing box for an oil well pump which utilizes a separate lubricating fluid chamber for the polish rod rather than using the crude oil that is being pumped as the lubricating fluid.... | 01/01/1991 |
| 4886241 | Valve stem packing containment for high pressure, high temperature A fluid valve for use in elevated pressure and temperature conditions. Composition material wiper rings are provided in the packing bore between the packing follower and the packing box ring. The composition wiper rings have an inner diameter substantiall... | 12/12/1989 |
| 4844479 | Structure of a gland packing box A structure of a gland packing box is enhanced in the lubricating function and cooling function of the seal part, by forming at least one disclocating part for partly dislocating in the axial direction a gland packing of the gland packing box. The disloca... | 07/04/1989 |
| 4737087 | Drive shaft seal for gear pump and method A seal for the drive shaft of a gear pump for polymeric materials dissolved in a fluid solvent is disclosed, and which is adapted to prevent the polymeric material from leaking and hardening on the drive shaft. The seal includes a pair of axially spaced a... | 04/12/1988 |
| 4647050 | Stuffing box for a sucker rod pump assembly A stuffing box for a sucker rod pump assembly is disclosed that utilizes natural convection currents generated in a lubricating fluid reservoir mounted on the housing of the stuffing box and in fluid communication with the interior of the housing to conti... | 03/03/1987 |
| 4613140 | Self-aligning lubricating stuffing box A self-aligning and self-lubricating stuffing box for oil well polish rods, pump rods and the like, and comprising a housing disposed around the outer periphery of the rod and having an internal cooling chamber surrounding the outer periphery of the rod f... | 09/23/1986 |
| 4572519 | Packing assembly for use in a plunger bore In plunger-type pumps a packing assembly is installed around the plunger to prevent fluid from leaking past the moving plunger. The packing assembly includes male and female adaptor rings, which are in face-to-face contact with the packing rings, but prov... | 02/25/1986 |
