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Cherry pitter
| Details |
Inventors: Cheung, Paul P. W.;
Assignee: Maxpat Trading & Marketing (Far East) Limited (HK)
Primary Examiner: Simone; Timothy F.
Assistant Examiner:
Attorney, Agent or Firm: Townsend and Townsend Khourie and Crew
A cherry pitter comprising a pitting station (24) adapted to support a cherry (88) having an opening 84 sized to allow passage of a pit (85), but not the cherry (88). A pit ejector (26) adapted to reciprocate along a longitudinal axis includes an elongate punch having a number of arms (50, 52, 54, 56) radiating out from the longitudinal axis, each arm extending beyond the proximal end of the punch to form a cruciform cross-section. One of the arms (56) has a substantially flat profile and the other three arms (50, 52, 54) have an undercut portion (66) of the same order of axial length as the diameter of a typical cherry. The punch is oriented so that the flat arm (56) projects towards a delivery passage (22). The delivery passage (22) has an arcuate channel that aligns the cherries and delivers them to the pitting station (24) one at a time. The elongate punch drives into the cherry (86) and pushes the pit through the outer flesh of the cherry (86) and through the opening (84) and into a pit chamber (94). The punch then pulls the cherry (86) back along the longitudinal axis so that the cherry (86) falls into a cherry bowl (13). |
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DETAILED DESCRIPTION According to the invention in one aspect a cherry pitter comprises a pitting station at which a cherry is supported over an opening of a size to allow passage of a pit, but not a cherry, and a pit ejector reciprocatable across that station to press into and through a cherry at the station and push the pit through the flesh of the cherry and out through the opening, the pit ejector comprising an elongate punch having a cross-shaped cross-section with a number of arms radiating out from its longitudinal axis along which it is reciprocatable, each arm having a pointed tip spaced outwardly from the axis and an end inclined such that the end of the punch has a hollowed centre, at least some of the arms having an undercut portion along their length, that is to say, in a direction away from the tip, an initial portion followed by a portion of reduced height, preferably thereafter followed by a portion of increased height.
We have found that with such a cross-section to the pit ejector, there is the minimum of damage to the flesh of the cherry yet at the same time the pit can be ejected very effectively.
Preferably the initial portion of an arm adjacent the end is of progressively increasing length outwardly from the axis.
The resulting inclined faces of the edges of the arms which are of increasing height from the axis cut gently through the flesh of the cherry.
Also the tip and sides of the arms of the ejector enter the flesh by cleanly cutting the flesh and substantially without damaging or squashing the flesh.
The hollowed end of the pit ejector will engage over and centre on the pit even though there will be considerable irregularities as between one cherry and another as to the position and size of a pit.
The initial portions of the arms need not be very long, indeed they are preferably relatively short, and will generally only need to be sufficiently long in the axial direction to ensure that the tip of the ejector engages the pit before these parts of the arms have fully penetrated the flesh of the cherry
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