| Patents for F04B 33 - Pumps specially adapted for elastic fluids actuated by muscle power, e.g. for inflating (2,403) |
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| 11/14/1991 | WO1991017064A1 Bicycle operated air pump |
| 11/12/1991 | US5064105 Decompression device for suction pumps |
| 11/06/1991 | CN2088176U Air-reserving and pressure-regulating rocker-arm air pump |
| 11/06/1991 | CN2088175U Air-reserving rocker-arm air pump |
| 11/06/1991 | CN2088174U High-pressure double-layer inflater |
| 10/23/1991 | EP0453387A1 A decompression device for suction pumps |
| 10/23/1991 | CN2087251U Tower-shaped pedal inflating pump |
| 10/23/1991 | CN1055583A Manual air-hydraulic press |
| 10/16/1991 | CN2086808U High-efficiency pen-type inflator |
| 10/16/1991 | CN1055412A Decompression device for suction pumps |
| 10/09/1991 | CN2086325U Hand inflator for bicycle |
| 10/02/1991 | CN1014132B Portable air pump for automative vehicle |
| 09/25/1991 | CN2085430U Cycle-mounted air storing type air pump with rocker |
| 09/24/1991 | US5051073 Bicycle pump |
| 09/03/1991 | CA1288401C Portable air pump assembly and detachable safety lamp for automotive vehicle |
| 08/14/1991 | CN1053772A Male type bicycle with inflator provided for oneself |
| 08/07/1991 | EP0440018A1 Bicycle with integrated air-pump |
| 07/30/1991 | US5035440 Pump |
| 07/17/1991 | CN2080999U High-pressure air pump with double piston and three tubes |
| 07/10/1991 | CN1052767A Compressed sprayer in additional use for inflator |
| 06/26/1991 | CN2079670U Single tube, high-pressure, labour-saving inflater |
| 06/25/1991 | US5026261 Compact air pump |
| 06/13/1991 | WO1991008365A1 Apparatus for securing mobile articles and inflater |
| 06/12/1991 | CN2078814U Portable box-type manpower inflating pump |
| 05/22/1991 | CN2077493U Multipurpose inflater |
| 05/21/1991 | US5016894 Combination seat post and air pump for bicycle |
| 04/30/1991 | US5011381 Hand-held vacuum pump vacuum release |
| 04/17/1991 | CN2075261U Convenient inflating pump of cycle |
| 03/13/1991 | CN2073039U Miniature foot-treaded inflater with air reservoir |
| 03/12/1991 | US4998633 Stopper for a container such as a bottle and including slit valve structure, for use with a pump for altering and thereafter maintaining altered pressure in the container |
| 03/06/1991 | CN2072607U Portable dual-tube booster inflator |
| 02/26/1991 | CA1280718C2 Pump and stopper apparatus |
| 02/21/1991 | WO1991002159A1 Pump |
| 01/09/1991 | CN2069036U Air inflating beam pump |
| 12/26/1990 | CN2068162U Backspin thread type piston pump for bicycle |
| 12/25/1990 | US4979883 Vacuum limiter for pump |
| 12/19/1990 | CN2067771U Hand-operated big-flow grease charger |
| 12/13/1990 | DE3918805A1 Pair of bellows for inflating air bed - has combination of two functionally different hollow inflatable sections |
| 12/12/1990 | CN2067330U Extraction inflator |
| 10/03/1990 | CN2063174U Pedal type pocket air pump |
| 09/04/1990 | US4954054 Hand-held vacuum and pressure pump |
| 08/29/1990 | CN2061216U Single-pipe lower-storage type inflator |
| 08/22/1990 | CN2060823U Pedal high pressure air pump with single arm and double cylinder |
| 08/22/1990 | CN2060822U Apparatus for supplying fuel to automobile |
| 08/15/1990 | CN2060481U Foot inflater with the function of air filling and air storing |
| 08/14/1990 | US4947696 Bellow pump for gas test tube |
| 07/18/1990 | CN2059462U Manual air pump |
| 07/18/1990 | CN2059461U High-pressure hand air pump with external valve |
| 06/12/1990 | US4932849 Manual air pump for two wheel tires |
| 06/06/1990 | CN2057965U Aerator of tyre |
| 06/05/1990 | US4930174 Pump assembly for air mattress |
| 05/30/1990 | CN2057707U Swaying type inflator |
| 05/23/1990 | CN2057468U High-pressure air pump without air storage tank |
| 05/23/1990 | CN1008129B Single cylinder effort-saving high-pressure air pump |
| 05/09/1990 | EP0366859A2 Piston air pump |
| 04/24/1990 | US4919600 Tire pump with a pressure gage |
| 03/27/1990 | US4911314 Stopper for a container such as a bottle, and a pump connectable thereto for extraction of gaseous medium from or pumping in thereof into the container |
| 03/21/1990 | CN2054841U Portable hand inflater carried on bicycle |
| 03/14/1990 | CN2054429U Bicycle with gas-filled function |
| 03/07/1990 | CN2054090U Short air storage pump |
| 02/14/1990 | CN2052827U Pedal inflater |
| 02/07/1990 | CN2052450U Lever power-saving inflater |
| 01/31/1990 | CN2052062U Pocket pedal inflator with an air tank |
| 01/31/1990 | CN2052061U Multi-purpose valved inflator with an air tank |
| 01/10/1990 | CN2050886U Portable air pump |
| 12/27/1989 | CN2050096U Piano type booster pump |
| 12/27/1989 | CN2050095U Dual-piston gas-filled device |
| 12/20/1989 | CN2049682U Portable auxiliary starter for motorcar |
| 12/13/1989 | CN2049279U Lightweight high-efficiency inflator |
| 12/06/1989 | CN2048904U High-pressure inflator |
| 11/29/1989 | CN2048521U Tyer pump with pressure gauge |
| 11/28/1989 | US4882978 Bellows pneumatic system |
| 11/08/1989 | CN2047311U Automatic pressure-control pump |
| 11/01/1989 | CN2046938U Micro-type manual large-displacement inflator |
| 10/26/1989 | DE3811499C1 Air pump for a bicycle |
| 10/11/1989 | CN2045788U Boxlike foot high-pressur inflator |
| 10/11/1989 | CN2045787U Dual-purpose air inflating and extracting pump |
| 10/11/1989 | CN1036173A Portable air pump assembly and detachable safety lamp for automotive vehicle |
| 08/22/1989 | US4858478 Bellows type hand-operated air sampling pump |
| 08/16/1989 | CN2042898U High-pressure inflator |
| 08/02/1989 | CN2042118U Clamped leather washer |
| 07/26/1989 | CN2041732U Separating joint inflator |
| 07/19/1989 | CN2041371U High pressure compensating type pedal inflator |
| 07/05/1989 | CN2040550U Pedal air pump |
| 07/05/1989 | CN2040482U Inclined beam inflator for bicycle |
| 06/28/1989 | CN2040173U High-pressure inflator |
| 06/28/1989 | CN2040172U Energetic inflator |
| 06/27/1989 | US4842489 Hand-operated pump changeable from dual action to single action |
| 06/27/1989 | US4842290 Combination seat post and air pump for bicycle |
| 06/21/1989 | CN2039759U Pneumatic fuel (liquid) pump |
| 05/31/1989 | CN2038562U Pedal type two-stage inflater |
| 05/10/1989 | CN2037400U Dual pedal air pump |
| 05/10/1989 | CN2037399U Handy bicycle pump with displaying air-pressure |
| 04/26/1989 | CN2036590U Multifunction air-extracting and -inflation pump |
| 04/25/1989 | US4824340 Bellows pneumatic system |
| 04/25/1989 | US4823968 Closure for carbonated beverage container with integral pump mechanism |
| 03/15/1989 | CN2034203U Two-use air pump |
| 02/28/1989 | US4807931 Air-controlled lumbar support device |
| 02/22/1989 | CN2033066U Hand air-blower |
| 02/21/1989 | US4806084 Hand-held vacuum pump |