# US 2019/0316668 A1 · Roller lifter and method of manufacturing the same

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- Number: US 2019/0316668 A1
- Document ID: US20190316668A1
- Status: Published application
- Kind: A1
- Application number: 16/367,505
- Filed: 2019-03-28
- Published: 2019-10-17
- Earliest claimed: 2018-04-17
- Assignees: Otics Corporation
- Applicants: Otics Corporation
- Inventors: Satoshi SUZUKI; Eiichi NOZAKI; Akihiro SUZUKI
- Web page: https://patentgrep.com/patent/US20190316668A1

## CPC

- F16H 53/06: Cam-followers (F16H53/08 takes precedence)
- B21D 22/04: for dimpling (combined with perforating B21D28/24)
- B21D 28/26: in sheets or flat parts
- B21D 53/84: other parts for engines, e.g. connecting-rods
- F02M 59/102: {Mechanical drive, e.g. tappets or cams (F02M45/063 takes precedence)}
- F04B 1/0413: Cams
- F04B 1/0426: Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
- F04B 1/0439: Supporting or guiding means for the pistons
- F04B 1/053: with actuating or actuated elements at the inner ends of the cylinders
- F04B 9/042: {the means being cams}
- F01L 1/14: Tappets {(hydraulic tappets for automatically adjusting or compensating clearance F01L1/24)}; Push rods
- F02M 2200/8015: Provisions for assembly of fuel injection apparatus in a certain orientation, e.g. markings, notches or specially shaped sleeves other than a clip
- F02M 2200/852: provisions for mounting the fuel injection apparatus in a certain orientation, e.g. markings or notches
- F16H: GEARING
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES

## Abstract

A roller lifter includes a lifter body having a cylindrical peripheral wall with a sliding surface on an outer periphery thereof and a roller rotatably mounted via a shaft member on the lifter body and brought into contact with a cam. The sliding surface is reciprocally slid in a sliding hole of a lifter guide. The peripheral wall has a thicker part in a part thereof in a circumferential direction. The thicker part is shaped such that a thickening part is annexed to an outer wall part formed continuously with a constant thickness in the circumferential direction. The thicker part is formed with a rotation stopper bulging outward. The rotation stopper enters a guide groove communicating with the sliding hole of the lifter guide.

## Claims

### Claim 1

A roller lifter comprising:
a lifter body having a cylindrical peripheral wall with a sliding surface on an outer periphery thereof, the sliding surface being configured to reciprocally slide in a sliding hole of a lifter guide; and
a roller rotatably mounted via a shaft member on the lifter body and brought into contact with a cam,
wherein:
the peripheral wall has a thicker part in a part thereof in a circumferential direction;
the thicker part is shaped such that a thickening part is annexed to an outer wall part formed continuously with a constant thickness in the circumferential direction; and
the thicker part is formed with a rotation stopper bulging outward, the rotation stopper being configured to enter a guide groove communicating with the sliding hole of the lifter guide.

### Claim 2 (depends on 1)

The roller lifter according to claim 1, wherein an inner peripheral surface of the thicker part includes a part corresponding to the rotation stopper, the part being formed with a punch pushed recess, and the rotation stopper has a smaller width than the punch pushed recess.

### Claim 3 (depends on 1)

The roller lifter according to claim 1, wherein the thickening part is annexed to an inner periphery of the outer wall part and has a flat surface extending along a chordwise direction.

### Claim 4 (depends on 1)

The roller lifter according to claim 1, wherein the thickening part is annexed to a circumferentially middle side of the outer wall part.

### Claim 5 (depends on 1)

The roller lifter according to claim 1, wherein:
pair of the outer wall parts is provided on both radial sides of the peripheral wall;
the peripheral wall has a pair of opposed walls between the pair of the outer wall parts; and
the opposed walls have larger thicknesses than the outer wall parts.

### Claim 6 (depends on 1)

A method of manufacturing the roller lifter specified in claim 1, wherein the rotation stopper is formed by setting a receiving part on the outer peripheral surface of the peripheral wall and by pushing out a part of an inner peripheral surface of the peripheral wall to the receiving part side by a punching member for punch-pushing.

### Claim 7 (depends on 6)

The method according to claim 6, comprising a step of forming the rotation stopper setting the receiving part having a receiving-side recess on the outer peripheral surface of the peripheral wall and by pushing out the part of the inner peripheral surface of the peripheral wall into the receiving-side recess the pushing part of the punching member, wherein the receiving-side recess has a smaller width than the pushing part of the punching member.