| Patent Number |
Title Of Patent |
Date Issued |
| RE36825 |
Resilient edges for power operated doors |
August 22, 2000 |
| A pair of flexible interlocking edges for power operated doors primarily used on mass transit vehicles such as subway cars. If door closing is prevented, edge design allows withdrawal of obstructions, including deformable objects caught in the interstices of mating edges. |
| D246976 |
Positive displacement pump |
January 17, 1978 |
|
| D244681 |
Fluid pump or similar article |
June 14, 1977 |
|
| 5845609 |
Fluid heater coils |
December 8, 1998 |
| A fluid carrying coil for compact fluid heater utilizing dual lengths of metallic tubing wound in a bifilar manner to establish fluid flow internal of each tubing length such that when terminated from the coil outer periphery flow in the coil portion of each tubing length is in oppositio |
| 5775232 |
Bridge plate for a mass transit vehicle |
July 7, 1998 |
| A power operated retractable floor extension, extending outward from the floor of a mass transit vehicle. When extended, the floor portion bridges any gap between the vehicle floor and adjacent platform, thereby providing improved passenger access to the vehicle. Generally speaking, the |
| 4901474 |
Pneumatic door operator having novel pneumatic actuator and lock |
February 20, 1990 |
| A power door operator for transit vehicles utilizing a rodless pneumatic cylinder as a prime mover in opening and closing doors in the sidewall of a transit vehicles. Door movement having a controlled, predetermined door edge force is achieved through mechanical coupling an external pist |
| 4882876 |
Door operator with locking mechanism |
November 28, 1989 |
| Disclosed is an operator for a door mounted by frame means so as to be slidable along a track between open and closed positions. The door has a peripheral edge which is engaged to provide a positive locking of the door. The operator includes a shaft rotatably mounted alongside the door. |
| 4804910 |
Traction load meter system |
February 14, 1989 |
| A traction load meter system for displaying information concerning the amount of current energizing electric motors which drive a locomotive. These motors have power and braking modes and have a continuous current rating. The system includes a current-to-frequency converter for providing |
| 4722361 |
Modulating pressure operated pilot relief valve |
February 2, 1988 |
| The pilot valve 206 disclosed utilizes a piston 226 operating intermediate a pressure setting spring 234 and main valve head volume 222 vent valve, and having a single pressure sensing chamber 235. The operating piston includes an elongated extension 229 of reduced diameter extending fro |
| 4704870 |
Thermoelectric cooler |
November 10, 1987 |
| A thermoelectric cooler (10) having a storage compartment (36) with insulated inside walls forming an access opening on one side opposite a back wall (42a) of substantially the same size includes an insulated door (40) movable between a closed position sealing said access opening and an |
| 4653227 |
Door operating assembly |
March 31, 1987 |
| A door operating assembly for opening and closing vehicle doors at a constant door edge force includes a frame. A teeter lever assembly is pivotally mounted on the frame and is connected to a connecting rod assembly connecting the teeter lever assembly and the vehicle doors. A cylind |
| 4628835 |
Waste fluid incinerator having heat recovery means |
December 16, 1986 |
| An incinerator particularly suited for disposal of waste fluids containing undesirable chemicals and hydrocarbons including sodium cyanide. A novel dual fuel combustion system wherein the waste fluid is injected intermediate an inner high temperature flame and an outer somewhat lower |
| 4627242 |
Thermoelectric cooler |
December 9, 1986 |
| A thermoelectric cooler of rugged construction for use in cabs of a railway locomotive includes a housing with a storage compartment mounted therein surrounded by insulation. The compartment is fabricated of thermoconductive material and includes flat sides without protuberances. A p |
| 4621592 |
Boiler having improved heat absorption |
November 11, 1986 |
| A flash boiler or steam generator includes a shell defining a combustion chamber. A coil bank is mounted adjacent to the combustion chamber and includes an inner coil defining a heat absorption chamber. An intermediate coil is positioned in the chamber surrounding the inner coil. An oute |
| 4620490 |
Door seal |
November 4, 1986 |
| A seal for an access door (44) mounted on a combustion chamber of a fluid heater includes a gasket pad (56) that is sealed to the interior surface of the door (52) by adhesive material. The gasket pad is secured to the door by first applying adhesive material to the interior surface of t |
| 4616528 |
Valve actuator with continuous manual override |
October 14, 1986 |
| A valve actuator with manual override includes an input shaft for receiving input torque. The input shaft drives an epicyclic gear train sun gear and in turn is motor driven through a non-reversible gear set. The sun gear is in driving engagement with first, second and third planetary ge |
| 4615356 |
Modulating pressure operated pilot relief valve |
October 7, 1986 |
| A main valve includes a product pressure inlet, an outlet, a movable closure member and a pressurized head volume above the closure member. Product pressure relief flow through the main valve is controlled by a modulating, pressure operated pilot relief valve that includes a piston c |
| 4611104 |
Electromechanical switch actuator having high security key actuator |
September 9, 1986 |
| An electromechanical switch actuator operated by a detachable, mechanical key providing security against unauthorized operation. The switch actuator disclosed is of particularly rugged construction, arranged to provide rotary torque for operating axially coupled electromechanical rotary |
| 4593654 |
Combustion and feedwater controller for a flash boiler |
June 10, 1986 |
| A feedwater controller for a flash type water tube boiler wherein feedwater flow through steam generating coils heated by combustion gases is compensated and adjusted, in order to provide proper combustion heat input over a broad range of boiler operating pressures and feedwater temp |
| 4583466 |
Step lift for railway cars |
April 22, 1986 |
| Apparatus for railway cars to handle the ingress and egress of passengers through a door opening where the apparatus selectively provides at the exterior of the car at the door opening an adjustable height platform, steps or a ground-to-car floor platform lift. The apparatus is storable |
| 4556083 |
Pressure relief valve and method for modification thereof |
December 3, 1985 |
| A pressure relief valve operable in large transient pressure conditions includes a valve body. A valve seat is movably mounted on the body. A valve disc or pallet is pivotally connected to the valve body by a valve arm and aligned to engage the valve seat in a valve closed position. The |
| 4552335 |
Ball valve |
November 12, 1985 |
| A high pressure ball valve including a valve body with inlet and outlet ports, a ball having a passageway therethrough disposed between the ports, and seats between the ball and the ports guidably supporting the ball. Each seat includes a core of polyethersulphone having a ball engaging |
| 4538551 |
Refractory choke for a high intensity combustor |
September 3, 1985 |
| A boiler includes a high intensity combustor mounted in a shell that defines the boiler housing. A coil bank is mounted in the boiler and spaced from the combustor. A fire pot is positioned in the combustor and defines a combustion chamber with a combustion throat at one end and a ch |
| 4515179 |
Pressure relief valve with adjustment for set pressure |
May 7, 1985 |
| A pressure relief valve includes a housing defining an internal valve chamber. A valve seat is positioned within the chamber, and a valve pallet is reciprocally mounted within the chamber to engage the seat in a valve closed mode. A spring is mounted within the housing to bias the valve |
| 4491917 |
Door control systems |
January 1, 1985 |
| A door control system, particularly suited for multiple door rapid transit vehicles wherein car operating parameters including car speed sensing (5), traction propulsion sensing (7), and other indications of internal circuitry establish and continuously test for predetermined conditions |
| 4490941 |
Spindle door operator |
January 1, 1985 |
| A door operator for opening and closing doors on transit vehicles and the like includes an actuator (50) secured to the transit vehicle (10). The actuator houses a worm drive and a reciprocating air cylinder (52) for imparting rectilinear motion to the worm drive. A door shaft (18) is |
| 4450854 |
Lubricated split plug valve |
May 29, 1984 |
| A lubricated split plug valve includes a valve body defining a chamber with fluid ports therethrough. A valve stem is rotatably mounted in the body and engages a split cylindrical valve member. The valve member includes a cylindrical passage with first and second inlets. The valve member |
| 4445023 |
Electric thermal storage heater system for heating fluids |
April 24, 1984 |
| A thermal storage heater system for heating fluids includes a storage tank for accumulating and storing energy in the form of a quantity liquid heated to a high temperature by an electric immersion heating element in the tank. A source of a first fluid to be heated is connected to the |
| 4422387 |
Door seal |
December 27, 1983 |
| A seal for an access door (44) mounted on a combustion chamber of a fluid heater includes a gasket pad (56) that is sealed to the interior surface of the door (52) by adhesive material. The gasket pad is secured to the door by first applying adhesive material to the interior surface of t |
| 4410005 |
Pilot operated relief valve |
October 18, 1983 |
| A pilot operated relief valve for use on medium and high pressure vessels, conduits, and the like.A two-stage, non-flowing valve (5) operates a main relief valve (7) of substantially greater capacity. Flow control elements provided by (35), (36), (38), and (39) associated with the first |
| 4407623 |
Lift assembly including a reaction switch |
October 4, 1983 |
| A lift system for a transit vehicle includes a stationary main frame secured within a door recess of the vehicle and a side frame that is movable relative to the main frame. An articulated platform including steps pivotally secured to the side frame and scissor linkage pivotally and |
| 4402341 |
Pilot operated relief valve |
September 6, 1983 |
| A pilot operated relief valve for use on medium and high pressure vessels, conduits and the like.A two-stage, non-flowing valve (5) operates a main relief valve (7) of substantially greater capacity. Flow control elements provided by (35), (36), (38), and (39) associated with the first s |
| 4393893 |
Lubricated split plug valve |
July 19, 1983 |
| A lubricated split plug valve includes a valve body defining a chamber with fluid ports therethrough. A valve stem is rotatably mounted in the body and engages a split cylindrical valve member. The valve member includes a cylindrical passage with first and second inlets. The valve member |
| 4390041 |
Pilot operated relief valve |
June 28, 1983 |
| A pilot operated relief valve for use on medium and high pressure vessels, conduits, and the like. A unique two-stage, non-flowing pilot valve operates a main relief valve of substantially greater capacity. In a preferred embodiment main valve is mounted directly onto the pressure ve |
| 4379680 |
Ambient air timing device |
April 12, 1983 |
| An air timing device for a high pressure reciprocating injector pump 14 employing a piston or movable wall 50 and orifice 48 combination that is mechanically reset on the suction stroke of the pump includes a bellows 42 defining a variable volume chamber 44 including at least one movable |
| 4371762 |
Contactless pressure sensitive switch |
February 1, 1983 |
| A contactless pressure switch 10 sensitive to fluid pressure rates of change includes a housing 36 and a diaphragm 42 secured in the housing defining first and second chambers. Ports 48, 50 are included in the first and second chambers to vent the chambers. A magnet 52 is secured to the |
| 4369344 |
Sensitive door edge Wiegand module switch assembly |
January 18, 1983 |
| A sensitive edge 10 for door systems, lifts, doors, or other moving portions of transit vehicles that come into contact with articles or passengers includes a body defining a resilient deformable leading edge portion 30 and a base portion 32 within which is defined an internal chambe |
| 4362949 |
Load controller having time integrated demand |
December 7, 1982 |
| A load controller, primarily intended for use in systems having geographically distributed, energy utilizing loads, and employing stored energy heating apparatus. The controller (1, 10) disclosed, in conjunction with a stored energy heater (3, 4), when installed on an energy distribu |
| 4355657 |
Pilot operated relief valve |
October 26, 1982 |
| A pilot operated relief valve for use on medium and high pressure vessels, conduits, and the like.A unique two-stage, non-flowing pilot valve (5) operates a main relief valve (7) of substantially greater capacity. Flow control elements provided by 35, 36, 38, and 39 associated with the f |
| 4341398 |
System for controlling the kneeling operation of air suspension equipped transit vehicles |
July 27, 1982 |
| A system for controlling the kneeling operation of air suspension equipped transit vehicles includes air suspension members (20, 22, 24, 26, 28, 30) mounted at the wheels of the transit vehicle (10) and a fluid reservoir (32). A fluid circuit is included that communicates the reservoir w |
| 4316598 |
Balanced relief valve with novel seal |
February 23, 1982 |
| A pilot operated pressure relief valve for use on medium and high pressure vessels, conduits, and the like. A two-stage, non-flowing pilot valve operates a main relief valve of substantially greater capacity. In a preferred embodiment the main valve is mounted directly onto the pressure |
| 4305005 |
Load controller |
December 8, 1981 |
| A load controller, primarily intended for use in systems having geographically distributed, energy utilizing loads, and employing stored energy heating apparatus. The controller (1, 10) disclosed, in conjunction with a stored energy heater (3, 4), when installed on an energy distribu |
| 4303003 |
Switching valve |
December 1, 1981 |
| A pilot operated switching valve includes a sliding spool that is actuated by pilot pressure to control fluid through the valve to a prime mover. The ends of the spool are exposed to pilot pressure that moves the spool within the valve housing to control fluid flow through passages to an |
| 4302159 |
Ambient air timing device |
November 24, 1981 |
| An air timing device for a high pressure reciprocating injector pump 14 employing a piston or movable wall 50 and orifice 48 combination that is mechanically reset on the suction stroke of the pump includes a bellows 42 defining a variable volume chamber 44 including at least one movable |
| 4275664 |
Step-platform operation |
June 30, 1981 |
| A step-platform operator 17 for transit vehicles for driving a step 19 and a platform 18 between open and closed positions, includes a reversible drive motor 42 driving the step and platform through a lever and linkage for providing differential motion between step and platform during th |
| 4273307 |
Clutch for valve actuator |
June 16, 1981 |
| A valve actuator utilizing a drive motor and a stored energy device to operate valves primarily in safety related applications is disclosed. The actuator operates on signal or loss of power to return a driven valve to a predetermined position. The actuator in particular utilizes unidirec |
| 4266485 |
Control system for economic operation of multiple locomotive trains |
May 12, 1981 |
| A system for controlling tractive effort in diesel electric locomotives when train hauling requirements are such that multiple locomotives are required. Equipment and method of operation disclosed provides individual control of lead and trailing units, utilizing relatively simple, reliab |
| 4253489 |
Magnetic latch for pressure relief valve |
March 3, 1981 |
| A magnetic latch for a pressure or vacuum relief valve is disclosed. The pressure or vacuum relief valve includes a cover hingedly connected to a body and a valve seat defined on the body. The latch includes a housing having an open end and connected to either the valve cover or the body |
| 4249885 |
Heavy fuel oil nozzle |
February 10, 1981 |
| An atomizing nozzle particularly suited for your use in compact combustion chambers. Successful combustion of liquid fuels having generally high viscosity and widely varying properties such as distillation temperatures, distillation rates and impurities, including "heavy" and waste oil. |
| 4247266 |
Fluid pump drive system |
January 27, 1981 |
| A pump drive system (10) for pumping high temperature fluid includes a fluid pump (12) defined by a housing. The pump includes a fluid piston (16) for developing an impulse for pumping the fluid through the system (18). A fluid column (24) is included that is in fluid communication with |
