GB1323803A - Ball throwing machines - Google Patents

Ball throwing machines

Info

Publication number
GB1323803A
GB1323803A GB3972271A GB3972271A GB1323803A GB 1323803 A GB1323803 A GB 1323803A GB 3972271 A GB3972271 A GB 3972271A GB 3972271 A GB3972271 A GB 3972271A GB 1323803 A GB1323803 A GB 1323803A
Authority
GB
United Kingdom
Prior art keywords
ball
barrel
chamber
air
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3972271A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sweeton D C
Original Assignee
Sweeton D C
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sweeton D C filed Critical Sweeton D C
Publication of GB1323803A publication Critical patent/GB1323803A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N3/00—Preparing for use and conserving printing surfaces
    • B41N3/03—Chemical or electrical pretreatment
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/40—Stationarily-arranged devices for projecting balls or other bodies
    • A63B69/409—Stationarily-arranged devices for projecting balls or other bodies with pneumatic ball- or body-propelling means

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Feeding Of Articles To Conveyors (AREA)
GB3972271A 1970-08-24 1971-08-24 Ball throwing machines Expired GB1323803A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6644770A 1970-08-24 1970-08-24

Publications (1)

Publication Number Publication Date
GB1323803A true GB1323803A (en) 1973-07-18

Family

ID=22069550

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3972271A Expired GB1323803A (en) 1970-08-24 1971-08-24 Ball throwing machines

Country Status (4)

Country Link
JP (1) JPS554427B1 (enExample)
DE (1) DE2142416C2 (enExample)
FR (1) FR2105904A5 (enExample)
GB (1) GB1323803A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5581371U (enExample) * 1978-11-30 1980-06-04
CN110478880A (zh) * 2019-08-23 2019-11-22 商丘师范学院 一种网球训练矫正装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3210828C2 (de) * 1982-03-24 1986-03-13 Dieter 8900 Augsburg Miehlich Vereinzelungsvorrichtung für eine Ballwurfmaschine, insbesondere für Squashbälle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508461A (en) * 1946-11-05 1950-05-23 Lemon George Apparatus for practicing ping-pong and the like
US2574408A (en) * 1946-12-23 1951-11-06 Andrew S Moe Automatic ball pitching machine
US3018769A (en) * 1959-07-02 1962-01-30 Frank L Parsoneault Baseball pitching and fielding practice device
DE1845897U (de) * 1960-04-23 1962-02-01 Baumgarten K G Luftregulierer bei staubsaugern.
DE1185096B (de) * 1960-09-20 1965-01-07 Helmut Hoesselbarth Wurfgeraet fuer Tennisbaelle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5581371U (enExample) * 1978-11-30 1980-06-04
CN110478880A (zh) * 2019-08-23 2019-11-22 商丘师范学院 一种网球训练矫正装置

Also Published As

Publication number Publication date
FR2105904A5 (enExample) 1972-04-28
DE2142416A1 (de) 1972-03-02
DE2142416C2 (de) 1983-08-25
JPS554427B1 (enExample) 1980-01-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee