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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0725533 (1991-07-03) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 28 인용 특허 : 0 |
An economical relief pitcher in which there is employed a plurality of tubes, at least one of them being employed as a firing tube and at least one being employed for storing balls to be fired, the firing tube being connected with a high volume source of air. A remote push actuator can be employed t
A relief pitcher comprising: (a) a pair of tubes, one of said tubes being clear of balls for firing balls responsive to continuous flow of air therethrough and behind a ball the other of said tubes being available for storing balls; (b) air entry means provided in said other of said tubes and connec
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