Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 5953750 | Torso warmer for a buoyancy compensator A diving jacket for retaining warmth of a diver's torso is provided with an inner surface and an outer surface. The outer surface of the diving jacket is formed from first and second front torso portions fastened to a back portion. A releasable fastener f... | 09/21/1999 |
| 5683279 | Multi-part diving fin A multi-part diving fin includes a blade portion having a tip and a shoe end opposite the tip, the shoe end at least partially defining a foot pocket, and a foot plate formed as a separate piece from the blade portion and having a formation for releasably... | 11/04/1997 |
| 5657493 | Diving mask with quick-release strap attachment A diving mask includes a frame with a front portion and first and second side portions and enclosing at least one lens, a flexible skirt secured to the frame and constructed and arranged to provide a water-tight seal between the frame and the user's face,... | 08/19/1997 |
| 5630775 | Kick stroke simulator A device provides improved kick stroke simulation for the design and development of diving fins. The device includes a mechanical leg which provides the simulated kicking action and a controller for controlling the kicking action. The device is capable of... | 05/20/1997 |
| 5529057 | Snorkel splash protector An apparatus for use with a snorkel having a breathing tube with an upper end, the apparatus being constructed and arranged to prevent splash water from entering the snorkel tube, and including a tubular housing portion defining a Z-axis and a cylindrical... | 06/25/1996 |
| 5522679 | Buoyancy compensator having attached backpack A buoyancy compensator assembly for a diver is provided with a vest having an inner gas impermeable layer adapted to face a wearer and a congruently shaped opposing gas impermeable outer layer. The peripheral edges of the inner and outer layers are sealin... | 06/04/1996 |
| 5457284 | Interactive dive computer An interactive apparatus for use by a scuba diver to provide for diver control of a specified dive-related parameter. The diver enters into the apparatus a desired parameter value, such as air reserve available at the completion of a dive, and the apparat... | 10/10/1995 |
| 5313712 | Scuba diving instrument console having swivelling compass assembly An instrument console for use in scuba diving includes a console body having a first end adapted for connection to a pressurized air line, and a second end opposite the first end, at least one instrument being secured within the console body, a compass ha... | 05/24/1994 |
| 5265591 | Mask strap retainer clip for threaded snorkel tube A combination snorkel breathing tube and mask strap retainer clip includes a snorkel breathing tube having an externally threaded portion, a tubular barrel configured to circumscribe the threaded breathing tube, a tooth disposed on the tubular barrel for ... | 11/30/1993 |
| 5233976 | Second stage regulator hose with built-in cone adjusting tool A built-in regulator cone adjusting tool for a second stage regulator having a housing, an inlet port in the housing, and a cone having a front end and being disposed in the inlet port for reciprocal axial movement, the tool including a tubular body confi... | 08/10/1993 |
| 5222490 | Breathing regulator having air injector feature A breathing system regulator for a demand breathing system has adjusting apparatus for adjusting the demand required to open the air inlet valve to permit the user to increase or decrease the tension on the biasing spring urging the valve closed, and to d... | 06/29/1993 |
| 5199422 | Modular snorkel A modular snorkel includes a breathing tube, a snorkel body, a connector tube matingly and sealingly connecting the tube and the body. The breathing tube is rotatable relative to the snorkel body and has a plurality of vertically spaced ribs to which a ma... | 04/06/1993 |
| 5176169 | Pressure regulator for underwater breathing system A first stage SCUBA diving regulator has a removable cartridge containing the pressure regulating mechanism and a plurality of intermediate pressure outlet ports extending at acute angles from the body of the regulator. A plurality of rotatable intermedia... | 01/05/1993 |
| 5097860 | Pressure regulator for underwater breathing apparatus The first stage regulator of a two-stage underwater breathing apparatus utilizes an imperforate force transfer mechanism to automatically increase the rate at which breathing air is delivered from a high pressure supply to the second stage regulator as th... | 03/24/1992 |
| 4664109 | Mouthpiece A mouthpiece for use with a breathing device has a pliable lip flange which fits between the lips and teeth of the user and a pair of bite lugs which extend from the lip flange between the user's teeth and wherein the upper and lower bite surfaces of the ... | 05/12/1987 |
| 4616645 | Diving regulator with anti free-flow vane A demand regulator for use in underwater breathing apparatus employs a vane member dividing the mouthpiece tube into two adjacent air passageways. An interior end of the vane is configured as an air deflector for conducting pressurized air out of the mout... | 10/14/1986 |
| 4446859 | Breathing apparatus A demand regulator for use in underwater breathing employs a longitudinally movable tubular valve member having a transversely opening outlet orifice which is moved relative to the breathing port of the regulator as the valve member is moved axially betwe... | 05/08/1984 |
| 4214580 | Breathing apparatus The venturi action in a demand regulator is controlled by moving a baffle across an air inlet into the regulator chamber as the inlet valve is opened.... | 07/29/1980 |
| 4182323 | Breathing apparatus A demand regulator for use in underwater breathing employs a deflector carried by a valve operating lever for movement between the air outlet in the breathing chamber and the mouthpiece tube to reduce the portion of air supplied directly to the mouthpiece... | 01/08/1980 |
| 4140113 | Breathing apparatus A demand regulator for use in underwater breathing employs a deflector carried by a valve operating lever for movement between the air outlet in the breathing chamber and the mouthpiece tube to reduce the portion of air supplied directly to the mouthpiece... | 02/20/1979 |
| 4140112 | Diving regulator An imperforate clip is slidable on the air inlet housing in a diving regulator for movement over one of a plurality of valve outlet ports to adjust the ratio of the air flow into the breathing chamber to the air flow directly into the mouthpiece.... | 02/20/1979 |
| 4114389 | Constant volume buoyancy compensator A diver's buoyancy compensator employs a constant volume chamber which is controllably pressurized with air from the diver's SCUBA tank, and water is admitted to or emitted from the tank by one or the other of two manually operated valves.... | 09/19/1978 |
| 4098110 | Depth gauge A capillary depth gauge employs a transparent cover member having an annular magnifying lens portion overlying the capillary passageway to facilitate reading of the gauge.... | 07/04/1978 |
| 4068657 | Constant volume buoyancy compensation system A diver's buoyancy compensator employs a constant volume chamber which is controllably pressurized with air from the diver's SCUBA tank, and water is admitted to or emitted from the tank by a manually operated valve.... | 01/17/1978 |
| 4035857 | Divers buoyancy vest An inflatable buoyancy vest employs an open weave elastic gusset between the front and rear panels of the vest to hold the vest in a compact condition when the vest is deflated.... | 07/19/1977 |
| 4032311 | Tank filter A filter formed of minute fibers of borosilicate glass is mounted to the inlet-outlet valve of a rechargeable pressure vessel to remove entrained particles from fluid entering and exiting the vessel.... | 06/28/1977 |
| 4010746 | Regulator with water fill mechanism to prevent free flow The inhalation tube of a pressure regulator is divided by means of a baffle curved at its inner end adjacent the side wall of the chamber so that when the regulator is in the water with the mouthpiece open, water is channeled into the regulator chamber th... | 03/08/1977 |
| 3993060 | Diving snorkel with convoluted tube A diving snorkel has a flexible, tubular section having a substantially smooth inner surface to permit laminar air flow therethrough.... | 11/23/1976 |
