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US 11,794,122 B1Granted
Crane arm extension mechanism for toy truck
AssigneeMaison Battat Inc.
InventorMan Wa Choi
Life of this patent
Estimating the term…
Abstract
A toy truck having a crane arm, comprising multiple telescopic components to form a crane extension mechanism. The crane arm extension mechanism includes a crane arm that is capable of telescopically extending based on the air pressure manually provided to fill telescopic members of the crane arm. To telescopically extend the crane arm, a crank is rotated which causes an air pump to pump air into the crane arm. As the air pressure in the crane arm increases, the crane arm telescopically extends.
Claims10
An extendable crane arm mechanism for a toy truck having a flatbed section, the extendable crane arm mechanism comprising:
- a plurality of telescopic extension members, at least one of said telescopic extension members being slidably held within a hollow interior of an adjacent telescopic extension member, the plurality of extension members together being capable of moving from a retracted position to an extended length projecting position;
- said extension members providing and defining a closed air channel from a first
- proximal one of said extension members with respect to said flatbed section to a second and distal one of said extension members with respect to said flatbed section and having a one way valve for selectively maintaining air within said closed air channel when air is pumped therein;
- a plurality of individual boom members, said plurality of boom members being slidable over and holding said extension members;
- said plurality of boom members also being capable of moving from a retracted position
- to an extended position with respect to said flatbed section;
- an operable air pump to press air into said plurality of extension members to telescopically move from the retracted position to the extended position wherein a winding mechanism is also provided to said air pump, such that rotation of said winding mechanism causes said air pump to repeatedly press air into said plurality of extension members, said winding mechanism also comprising a winding spool attached to a first end of a length of cord, said cord having a second and distal end,
- wherein said cord is capable of being wound or unwound around said winding spool, and a hand crank attached to said winding mechanism, wherein rotation of said crank in a first direction causes the plurality of extension
- members to move from the retracted position to the extended position and causes said cord to unwind from around the winding spool, and wherein rotation of the crank in a second direction causes the plurality of extension members to move from the extended position to the retracted position as said cord rewinds around said winding spool.
6 more elements
A toy truck comprising:
- a cab and a flatbed body and a set of wheels for supporting said cab and said flatbed body;
- and an extendable crane arm mechanism connected to the flatbed body, the extendable crane arm mechanism comprising:
- a plurality of extension members each having two opposed ends, a first of said extension members being secured on a first of its two ends to said flatbed body and the second of said ends being outwardly projected, with additional extension members being connected to the first of said extension members to define a set of adjacent extension members distal of said first extension member, each of the plurality of distal extension members being telescopically slidably held within a hollow interior of an adjacent extension member, the plurality of distal extension members being capable of moving from a retracted position to an extended position with respect to said flatbed body, said extension members having a continuous sealed interior air chamber;
- a plurality of boom members, with at least one of said boom members being telescopically slidably held within a hollow interior of an adjacent boom member, the plurality of boom members being capable of moving from a retracted position to an extended position with respect to said flatbed body and supporting said extension members during extension thereof;
- an air pump attached to said air chamber of said extension members which can be operated to provide air into said air chamber to cause the plurality of extension members to move from the retracted position to the extended position,
- wherein the extendable crane arm mechanism further comprises a hand crank attached to a spool wherein manual rotation of said crank in a first direction
- causes air to flow into said air chamber of said extension members and results in extension of said crane arm and
- movement of said distal extension members from their retracted position to their extended position and also causes a cord to unwind from around said spool and wherein rotation of said crank in a second direction causes the plurality of said distal extension members to move from their extended position to their retracted position and also causes said cord to wind around said spool.
5 more elements
Dependencies are inferred from the claim text.