Chassis with locking device

Claim 2

Apparatus comprising a chassis, a bolster on said chassis, said chassis being mounted on wheels at at least one end thereof, said bolster having first and second aligned holes with the first hole being above the elevation of the second hole, a locking device, said locking device having an annular collar fixedly secured to said bolster at said first hole, a rotatable lock member supported above said collar, said lock member having a shank extending through said collar and into the second hole to thereby provide two bearing surfaces for said shank, a handle having one end coupled to the shank for rotating said member through an arc of 90* , said shank having a slot therethrough, said handle having a portion at one end which extends through said shank slot, a spring surrounding said shank, said spring biasing said handle in a direction along the shank away from said collar, and each of said lock member and collar having at least one flat thereon.

Claim 3

Apparatus in accordance with claim 1 wherein said chassis has first and second bolsters adjacent opposite ends thereof, each bolster being generally perpendicular to the longitudinal axis of the chassis, and each end of said bolster containing said locking device.

Claim 4

Apparatus in accordance with claim 1 wherein said bolster includes a wall having a slot therein, said wall slot having first and second niches defining the operative and inoperative positions of said locking member, said handle extending through said wall slot and being biased into one of said niches by said spring.

Claim 5

Apparatus in accordance with claim 3 wherein said handle is generally perpendicular to said bolster in one operative position of said locking member, said wall having a detent for receiving said handle in the other operative position of said locking member.

Claim 6

Apparatus comprising a chassis bolster, a locking device supported by said bolster, said bolster having a top plate having a hole therein, said locking device including a collar affixed to the top plate and extending through the hole, a rotatable lock member supported by tHe collar, said lock member having a slot therethrough, a handle having one end extending through the slot for rotating said lock member through an arc of 90* , said slot being on a shank portion of the lock member and being elongated in an axial direction of the shank, a spring surrounding said shank, said spring biasing said handle in an axial direction along the shank away from the collar, said handle being removable from the shank slot by an upward movement compressing said spring, said shank being vertically disposed, said handle having an upwardly facing notch receiving a portion of said spring, and said lock member having a dimension transversely greater than the corresponding dimension of said collar in one rotative disposition of said lock member.

Claim 7

Apparatus comprising a chassis bolster, a locking device supported by said bolster, said bolster having a top plate having a hole therein, said locking device including a collar affixed to the top plate and extending through the hole, a rotatable lock member supported by tHe collar, said lock member having a slot therethrough, a handle having one end extending through the slot for rotating said lock member through an arc of 90* , said slot being on a shank portion of the lock member and being elongated in an axial direction of the shank, a spring surrounding said shank, said spring biasing said handle in an axial direction along the shank away from the collar, said handle being removable from the shank slot by an upward movement compressing said spring, said shank being vertically disposed, said handle having an upwardly facing notch receiving a portion of said spring, and said lock member having a dimension transversely greater than the corresponding dimension of said collar in one rotative disposition of said lock member.